[PATCH 00/23] PCI: refactor the Mobiveil driver and add PCIe support for NXP LX SoCs

[PATCH 00/23] PCI: refactor the Mobiveil driver and add PCIe support for NXP LX SoCs

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

This patch set is aim to refactor the Mobiveil driver and add
PCIe support for NXP LX series SoCs.

Hou Zhiqiang (23):
  PCI: mobiveil: uniform the register accessors
  PCI: mobiveil: format the code without function change
  PCI: mobiveil: correct the returned error number
  PCI: mobiveil: remove flag MSI_FLAG_MULTI_PCI_MSI
  PCI: mobiveil: correct PCI base address in MEM/IO outbound windows
  PCI: mobiveil: replace the resource list iteration function
  PCI: mobiveil: use WIN_NUM_0 explicitly for CFG outbound window
  PCI: mobiveil: use the 1st inbound window for MEM inbound transactions
  PCI: mobiveil: correct the inbound/outbound window setup routine
  PCI: mobiveil: fix the INTx process error
  PCI: mobiveil: only fixup the Class Code field
  PCI: mobiveil: move out the link up waiting from mobiveil_host_init
  PCI: mobiveil: move irq chained handler setup out of DT parse
  PCI: mobiveil: initialize Primary/Secondary/Subordinate bus number
  dt-bindings: pci: mobiveil: change gpio_slave and apb_csr to optional
  PCI: mobiveil: refactor the Mobiveil driver
  PCI: mobiveil: continue to initialize the host upon no PCIe link
  PCI: mobiveil: disabled IB and OB windows set by bootloader
  PCI: mobiveil: add Byte and Half-Word width register accessors
  PCI: mobiveil: change prototype of function mobiveil_host_init
  dt-bindings: pci: Add NXP LX SoCs PCIe controller
  PCI: mobiveil: add PCIe RC driver for NXP LX series SoCs
  arm64: dts: freescale: lx2160a: add pcie DT nodes

 .../devicetree/bindings/pci/lx-pci.txt        |  52 ++
 .../devicetree/bindings/pci/mobiveil-pcie.txt |   2 +
 MAINTAINERS                                   |  10 +-
 .../arm64/boot/dts/freescale/fsl-lx2160a.dtsi | 157 ++++
 drivers/pci/controller/Kconfig                |  11 +-
 drivers/pci/controller/Makefile               |   2 +-
 drivers/pci/controller/mobiveil/Kconfig       |  34 +
 drivers/pci/controller/mobiveil/Makefile      |   5 +
 drivers/pci/controller/mobiveil/pci-lx.c      | 222 +++++
 .../controller/mobiveil/pcie-mobiveil-host.c  | 622 +++++++++++++
 .../controller/mobiveil/pcie-mobiveil-plat.c  |  54 ++
 .../pci/controller/mobiveil/pcie-mobiveil.c   | 245 +++++
 .../pci/controller/mobiveil/pcie-mobiveil.h   | 221 +++++
 drivers/pci/controller/pcie-mobiveil.c        | 861 ------------------
 14 files changed, 1625 insertions(+), 873 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/pci/lx-pci.txt
 create mode 100644 drivers/pci/controller/mobiveil/Kconfig
 create mode 100644 drivers/pci/controller/mobiveil/Makefile
 create mode 100644 drivers/pci/controller/mobiveil/pci-lx.c
 create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
 create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil-plat.c
 create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil.c
 create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil.h
 delete mode 100644 drivers/pci/controller/pcie-mobiveil.c

-- 
2.17.1

[PATCH 01/23] PCI: mobiveil: uniform the register accessors

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

It's confused that R/W some registers by csr_readl()/csr_writel(),
while others by read_paged_register()/write_paged_register().
Actually the low 3KB of 4KB PCIe configure space can be accessed
directly and high 1KB is paging area. So this patch uniformed the
register accessors to csr_readl() and csr_writel() by comparing
the register offset with page access boundary 3KB in the accessor
internal.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 drivers/pci/controller/pcie-mobiveil.c | 179 +++++++++++++++++--------
 1 file changed, 124 insertions(+), 55 deletions(-)

diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index 77052a0712d0..d55c7e780c6e 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -47,7 +47,6 @@
 #define  PAGE_SEL_SHIFT	13
 #define  PAGE_SEL_MASK		0x3f
 #define  PAGE_LO_MASK		0x3ff
-#define  PAGE_SEL_EN		0xc00
 #define  PAGE_SEL_OFFSET_SHIFT	10
 
 #define PAB_AXI_PIO_CTRL	0x0840
@@ -117,6 +116,12 @@
 #define LINK_WAIT_MIN	90000
 #define LINK_WAIT_MAX	100000
 
+#define PAGED_ADDR_BNDRY			0xc00
+#define OFFSET_TO_PAGE_ADDR(off)		\
+	((off & PAGE_LO_MASK) | PAGED_ADDR_BNDRY)
+#define OFFSET_TO_PAGE_IDX(off)			\
+	((off >> PAGE_SEL_OFFSET_SHIFT) & PAGE_SEL_MASK)
+
 struct mobiveil_msi {			/* MSI information */
 	struct mutex lock;		/* protect bitmap variable */
 	struct irq_domain *msi_domain;
@@ -145,15 +150,119 @@ struct mobiveil_pcie {
 	struct mobiveil_msi msi;
 };
 
-static inline void csr_writel(struct mobiveil_pcie *pcie, const u32 value,
-		const u32 reg)
+/*
+ * mobiveil_pcie_sel_page - routine to access paged register
+ *
+ * Registers whose address greater than PAGED_ADDR_BNDRY (0xc00) are paged,
+ * for this scheme to work extracted higher 6 bits of the offset will be
+ * written to pg_sel field of PAB_CTRL register and rest of the lower 10
+ * bits enabled with PAGED_ADDR_BNDRY are used as offset of the register.
+ */
+static void mobiveil_pcie_sel_page(struct mobiveil_pcie *pcie, u8 pg_idx)
 {
-	writel_relaxed(value, pcie->csr_axi_slave_base + reg);
+	u32 val;
+
+	val = readl(pcie->csr_axi_slave_base + PAB_CTRL);
+	val &= ~(PAGE_SEL_MASK << PAGE_SEL_SHIFT);
+	val |= (pg_idx & PAGE_SEL_MASK) << PAGE_SEL_SHIFT;
+
+	writel(val, pcie->csr_axi_slave_base + PAB_CTRL);
 }
 
-static inline u32 csr_readl(struct mobiveil_pcie *pcie, const u32 reg)
+static void *mobiveil_pcie_comp_addr(struct mobiveil_pcie *pcie, u32 off)
 {
-	return readl_relaxed(pcie->csr_axi_slave_base + reg);
+	if (off < PAGED_ADDR_BNDRY) {
+		/* For directly accessed registers, clear the pg_sel field */
+		mobiveil_pcie_sel_page(pcie, 0);
+		return pcie->csr_axi_slave_base + off;
+	}
+
+	mobiveil_pcie_sel_page(pcie, OFFSET_TO_PAGE_IDX(off));
+	return pcie->csr_axi_slave_base + OFFSET_TO_PAGE_ADDR(off);
+}
+
+static int mobiveil_pcie_read(void __iomem *addr, int size, u32 *val)
+{
+	if ((uintptr_t)addr & (size - 1)) {
+		*val = 0;
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+	}
+
+	switch (size) {
+	case 4:
+		*val = readl(addr);
+		break;
+	case 2:
+		*val = readw(addr);
+		break;
+	case 1:
+		*val = readb(addr);
+		break;
+	default:
+		*val = 0;
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+	}
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int mobiveil_pcie_write(void __iomem *addr, int size, u32 val)
+{
+	if ((uintptr_t)addr & (size - 1))
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+
+	switch (size) {
+	case 4:
+		writel(val, addr);
+		break;
+	case 2:
+		writew(val, addr);
+		break;
+	case 1:
+		writeb(val, addr);
+		break;
+	default:
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+	}
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static u32 csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size)
+{
+	void *addr;
+	u32 val;
+	int ret;
+
+	addr = mobiveil_pcie_comp_addr(pcie, off);
+
+	ret = mobiveil_pcie_read(addr, size, &val);
+	if (ret)
+		dev_err(&pcie->pdev->dev, "read CSR address failed\n");
+
+	return val;
+}
+
+static void csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off, size_t size)
+{
+	void *addr;
+	int ret;
+
+	addr = mobiveil_pcie_comp_addr(pcie, off);
+
+	ret = mobiveil_pcie_write(addr, size, val);
+	if (ret)
+		dev_err(&pcie->pdev->dev, "write CSR address failed\n");
+}
+
+static u32 csr_readl(struct mobiveil_pcie *pcie, u32 off)
+{
+	return csr_read(pcie, off, 0x4);
+}
+
+static void csr_writel(struct mobiveil_pcie *pcie, u32 val, u32 off)
+{
+	csr_write(pcie, val, off, 0x4);
 }
 
 static bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie)
@@ -342,45 +451,6 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie)
 	return 0;
 }
 
-/*
- * select_paged_register - routine to access paged register of root complex
- *
- * registers of RC are paged, for this scheme to work
- * extracted higher 6 bits of the offset will be written to pg_sel
- * field of PAB_CTRL register and rest of the lower 10 bits enabled with
- * PAGE_SEL_EN are used as offset of the register.
- */
-static void select_paged_register(struct mobiveil_pcie *pcie, u32 offset)
-{
-	int pab_ctrl_dw, pg_sel;
-
-	/* clear pg_sel field */
-	pab_ctrl_dw = csr_readl(pcie, PAB_CTRL);
-	pab_ctrl_dw = (pab_ctrl_dw & ~(PAGE_SEL_MASK << PAGE_SEL_SHIFT));
-
-	/* set pg_sel field */
-	pg_sel = (offset >> PAGE_SEL_OFFSET_SHIFT) & PAGE_SEL_MASK;
-	pab_ctrl_dw |= ((pg_sel << PAGE_SEL_SHIFT));
-	csr_writel(pcie, pab_ctrl_dw, PAB_CTRL);
-}
-
-static void write_paged_register(struct mobiveil_pcie *pcie,
-		u32 val, u32 offset)
-{
-	u32 off = (offset & PAGE_LO_MASK) | PAGE_SEL_EN;
-
-	select_paged_register(pcie, offset);
-	csr_writel(pcie, val, off);
-}
-
-static u32 read_paged_register(struct mobiveil_pcie *pcie, u32 offset)
-{
-	u32 off = (offset & PAGE_LO_MASK) | PAGE_SEL_EN;
-
-	select_paged_register(pcie, offset);
-	return csr_readl(pcie, off);
-}
-
 static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num,
 		int pci_addr, u32 type, u64 size)
 {
@@ -397,19 +467,19 @@ static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num,
 	pio_ctrl_val = csr_readl(pcie, PAB_PEX_PIO_CTRL);
 	csr_writel(pcie,
 		pio_ctrl_val | (1 << PIO_ENABLE_SHIFT), PAB_PEX_PIO_CTRL);
-	amap_ctrl_dw = read_paged_register(pcie, PAB_PEX_AMAP_CTRL(win_num));
+	amap_ctrl_dw = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num));
 	amap_ctrl_dw = (amap_ctrl_dw | (type << AMAP_CTRL_TYPE_SHIFT));
 	amap_ctrl_dw = (amap_ctrl_dw | (1 << AMAP_CTRL_EN_SHIFT));
 
-	write_paged_register(pcie, amap_ctrl_dw | lower_32_bits(size64),
-				PAB_PEX_AMAP_CTRL(win_num));
+	csr_writel(pcie, amap_ctrl_dw | lower_32_bits(size64),
+		   PAB_PEX_AMAP_CTRL(win_num));
 
-	write_paged_register(pcie, upper_32_bits(size64),
-				PAB_EXT_PEX_AMAP_SIZEN(win_num));
+	csr_writel(pcie, upper_32_bits(size64),
+		   PAB_EXT_PEX_AMAP_SIZEN(win_num));
 
-	write_paged_register(pcie, pci_addr, PAB_PEX_AMAP_AXI_WIN(win_num));
-	write_paged_register(pcie, pci_addr, PAB_PEX_AMAP_PEX_WIN_L(win_num));
-	write_paged_register(pcie, 0, PAB_PEX_AMAP_PEX_WIN_H(win_num));
+	csr_writel(pcie, pci_addr, PAB_PEX_AMAP_AXI_WIN(win_num));
+	csr_writel(pcie, pci_addr, PAB_PEX_AMAP_PEX_WIN_L(win_num));
+	csr_writel(pcie, 0, PAB_PEX_AMAP_PEX_WIN_H(win_num));
 }
 
 /*
@@ -437,8 +507,7 @@ static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num,
 	csr_writel(pcie, 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT |
 			lower_32_bits(size64), PAB_AXI_AMAP_CTRL(win_num));
 
-	write_paged_register(pcie, upper_32_bits(size64),
-				PAB_EXT_AXI_AMAP_SIZE(win_num));
+	csr_writel(pcie, upper_32_bits(size64), PAB_EXT_AXI_AMAP_SIZE(win_num));
 
 	/*
 	 * program AXI window base with appropriate value in
-- 
2.17.1

[PATCH 02/23] PCI: mobiveil: format the code without function change

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

Just format the code without functionality change.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 drivers/pci/controller/pcie-mobiveil.c | 261 +++++++++++++------------
 1 file changed, 137 insertions(+), 124 deletions(-)

diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index d55c7e780c6e..b87471f08a40 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -31,38 +31,40 @@
  * translation tables are grouped into windows, each window registers are
  * grouped into blocks of 4 or 16 registers each
  */
-#define PAB_REG_BLOCK_SIZE	16
-#define PAB_EXT_REG_BLOCK_SIZE	4
+#define PAB_REG_BLOCK_SIZE		16
+#define PAB_EXT_REG_BLOCK_SIZE		4
 
-#define PAB_REG_ADDR(offset, win) (offset + (win * PAB_REG_BLOCK_SIZE))
-#define PAB_EXT_REG_ADDR(offset, win) (offset + (win * PAB_EXT_REG_BLOCK_SIZE))
+#define PAB_REG_ADDR(offset, win)	\
+	(offset + (win * PAB_REG_BLOCK_SIZE))
+#define PAB_EXT_REG_ADDR(offset, win)	\
+	(offset + (win * PAB_EXT_REG_BLOCK_SIZE))
 
-#define LTSSM_STATUS		0x0404
-#define  LTSSM_STATUS_L0_MASK	0x3f
-#define  LTSSM_STATUS_L0	0x2d
+#define LTSSM_STATUS			0x0404
+#define  LTSSM_STATUS_L0_MASK		0x3f
+#define  LTSSM_STATUS_L0		0x2d
 
-#define PAB_CTRL		0x0808
-#define  AMBA_PIO_ENABLE_SHIFT	0
-#define  PEX_PIO_ENABLE_SHIFT	1
-#define  PAGE_SEL_SHIFT	13
-#define  PAGE_SEL_MASK		0x3f
-#define  PAGE_LO_MASK		0x3ff
-#define  PAGE_SEL_OFFSET_SHIFT	10
+#define PAB_CTRL			0x0808
+#define  AMBA_PIO_ENABLE_SHIFT		0
+#define  PEX_PIO_ENABLE_SHIFT		1
+#define  PAGE_SEL_SHIFT			13
+#define  PAGE_SEL_MASK			0x3f
+#define  PAGE_LO_MASK			0x3ff
+#define  PAGE_SEL_OFFSET_SHIFT		10
 
-#define PAB_AXI_PIO_CTRL	0x0840
-#define  APIO_EN_MASK		0xf
+#define PAB_AXI_PIO_CTRL		0x0840
+#define  APIO_EN_MASK			0xf
 
-#define PAB_PEX_PIO_CTRL	0x08c0
-#define  PIO_ENABLE_SHIFT	0
+#define PAB_PEX_PIO_CTRL		0x08c0
+#define  PIO_ENABLE_SHIFT		0
 
 #define PAB_INTP_AMBA_MISC_ENB		0x0b0c
-#define PAB_INTP_AMBA_MISC_STAT	0x0b1c
+#define PAB_INTP_AMBA_MISC_STAT		0x0b1c
 #define  PAB_INTP_INTX_MASK		0x01e0
 #define  PAB_INTP_MSI_MASK		0x8
 
-#define PAB_AXI_AMAP_CTRL(win)	PAB_REG_ADDR(0x0ba0, win)
-#define  WIN_ENABLE_SHIFT	0
-#define  WIN_TYPE_SHIFT	1
+#define PAB_AXI_AMAP_CTRL(win)		PAB_REG_ADDR(0x0ba0, win)
+#define  WIN_ENABLE_SHIFT		0
+#define  WIN_TYPE_SHIFT			1
 
 #define PAB_EXT_AXI_AMAP_SIZE(win)	PAB_EXT_REG_ADDR(0xbaf0, win)
 
@@ -70,16 +72,16 @@
 #define  AXI_WINDOW_ALIGN_MASK		3
 
 #define PAB_AXI_AMAP_PEX_WIN_L(win)	PAB_REG_ADDR(0x0ba8, win)
-#define  PAB_BUS_SHIFT		24
-#define  PAB_DEVICE_SHIFT	19
-#define  PAB_FUNCTION_SHIFT	16
+#define  PAB_BUS_SHIFT			24
+#define  PAB_DEVICE_SHIFT		19
+#define  PAB_FUNCTION_SHIFT		16
 
 #define PAB_AXI_AMAP_PEX_WIN_H(win)	PAB_REG_ADDR(0x0bac, win)
 #define PAB_INTP_AXI_PIO_CLASS		0x474
 
-#define PAB_PEX_AMAP_CTRL(win)	PAB_REG_ADDR(0x4ba0, win)
-#define  AMAP_CTRL_EN_SHIFT	0
-#define  AMAP_CTRL_TYPE_SHIFT	1
+#define PAB_PEX_AMAP_CTRL(win)		PAB_REG_ADDR(0x4ba0, win)
+#define  AMAP_CTRL_EN_SHIFT		0
+#define  AMAP_CTRL_TYPE_SHIFT		1
 
 #define PAB_EXT_PEX_AMAP_SIZEN(win)	PAB_EXT_REG_ADDR(0xbef0, win)
 #define PAB_PEX_AMAP_AXI_WIN(win)	PAB_REG_ADDR(0x4ba4, win)
@@ -87,39 +89,39 @@
 #define PAB_PEX_AMAP_PEX_WIN_H(win)	PAB_REG_ADDR(0x4bac, win)
 
 /* starting offset of INTX bits in status register */
-#define PAB_INTX_START	5
+#define PAB_INTX_START			5
 
 /* supported number of MSI interrupts */
-#define PCI_NUM_MSI	16
+#define PCI_NUM_MSI			16
 
 /* MSI registers */
-#define MSI_BASE_LO_OFFSET	0x04
-#define MSI_BASE_HI_OFFSET	0x08
-#define MSI_SIZE_OFFSET	0x0c
-#define MSI_ENABLE_OFFSET	0x14
-#define MSI_STATUS_OFFSET	0x18
-#define MSI_DATA_OFFSET	0x20
-#define MSI_ADDR_L_OFFSET	0x24
-#define MSI_ADDR_H_OFFSET	0x28
+#define MSI_BASE_LO_OFFSET		0x04
+#define MSI_BASE_HI_OFFSET		0x08
+#define MSI_SIZE_OFFSET			0x0c
+#define MSI_ENABLE_OFFSET		0x14
+#define MSI_STATUS_OFFSET		0x18
+#define MSI_DATA_OFFSET			0x20
+#define MSI_ADDR_L_OFFSET		0x24
+#define MSI_ADDR_H_OFFSET		0x28
 
 /* outbound and inbound window definitions */
-#define WIN_NUM_0		0
-#define WIN_NUM_1		1
-#define CFG_WINDOW_TYPE	0
-#define IO_WINDOW_TYPE		1
-#define MEM_WINDOW_TYPE	2
-#define IB_WIN_SIZE		((u64)256 * 1024 * 1024 * 1024)
-#define MAX_PIO_WINDOWS	8
+#define WIN_NUM_0			0
+#define WIN_NUM_1			1
+#define CFG_WINDOW_TYPE			0
+#define IO_WINDOW_TYPE			1
+#define MEM_WINDOW_TYPE			2
+#define IB_WIN_SIZE			((u64)256 * 1024 * 1024 * 1024)
+#define MAX_PIO_WINDOWS			8
 
 /* Parameters for the waiting for link up routine */
-#define LINK_WAIT_MAX_RETRIES	10
-#define LINK_WAIT_MIN	90000
-#define LINK_WAIT_MAX	100000
+#define LINK_WAIT_MAX_RETRIES		10
+#define LINK_WAIT_MIN			90000
+#define LINK_WAIT_MAX			100000
 
-#define PAGED_ADDR_BNDRY			0xc00
-#define OFFSET_TO_PAGE_ADDR(off)		\
+#define PAGED_ADDR_BNDRY		0xc00
+#define OFFSET_TO_PAGE_ADDR(off)	\
 	((off & PAGE_LO_MASK) | PAGED_ADDR_BNDRY)
-#define OFFSET_TO_PAGE_IDX(off)			\
+#define OFFSET_TO_PAGE_IDX(off)		\
 	((off >> PAGE_SEL_OFFSET_SHIFT) & PAGE_SEL_MASK)
 
 struct mobiveil_msi {			/* MSI information */
@@ -297,14 +299,14 @@ static void __iomem *mobiveil_pcie_map_bus(struct pci_bus *bus,
 					unsigned int devfn, int where)
 {
 	struct mobiveil_pcie *pcie = bus->sysdata;
+	u32 value;
 
 	if (!mobiveil_pcie_valid_device(bus, devfn))
 		return NULL;
 
-	if (bus->number == pcie->root_bus_nr) {
-		/* RC config access */
+	/* RC config access */
+	if (bus->number == pcie->root_bus_nr)
 		return pcie->csr_axi_slave_base + where;
-	}
 
 	/*
 	 * EP config access (in Config/APIO space)
@@ -312,10 +314,12 @@ static void __iomem *mobiveil_pcie_map_bus(struct pci_bus *bus,
 	 * (BDF) in PAB_AXI_AMAP_PEX_WIN_L0 Register.
 	 * Relies on pci_lock serialization
 	 */
-	csr_writel(pcie, bus->number << PAB_BUS_SHIFT |
-			PCI_SLOT(devfn) << PAB_DEVICE_SHIFT |
-			PCI_FUNC(devfn) << PAB_FUNCTION_SHIFT,
-			PAB_AXI_AMAP_PEX_WIN_L(WIN_NUM_0));
+	value = bus->number << PAB_BUS_SHIFT |
+		PCI_SLOT(devfn) << PAB_DEVICE_SHIFT |
+		PCI_FUNC(devfn) << PAB_FUNCTION_SHIFT;
+
+	csr_writel(pcie, value, PAB_AXI_AMAP_PEX_WIN_L(WIN_NUM_0));
+
 	return pcie->config_axi_slave_base + where;
 }
 
@@ -350,22 +354,22 @@ static void mobiveil_pcie_isr(struct irq_desc *desc)
 
 	/* Handle INTx */
 	if (intr_status & PAB_INTP_INTX_MASK) {
-		shifted_status = csr_readl(pcie, PAB_INTP_AMBA_MISC_STAT) >>
-			PAB_INTX_START;
+		shifted_status = csr_readl(pcie, PAB_INTP_AMBA_MISC_STAT);
+		shifted_status >>= PAB_INTX_START;
 		do {
 			for_each_set_bit(bit, &shifted_status, PCI_NUM_INTX) {
 				virq = irq_find_mapping(pcie->intx_domain,
-						bit + 1);
+							bit + 1);
 				if (virq)
 					generic_handle_irq(virq);
 				else
-					dev_err_ratelimited(dev,
-						"unexpected IRQ, INT%d\n", bit);
+					dev_err_ratelimited(dev, "unexpected IRQ, INT%d\n",
+							    bit);
 
 				/* clear interrupt */
 				csr_writel(pcie,
-					shifted_status << PAB_INTX_START,
-					PAB_INTP_AMBA_MISC_STAT);
+					   shifted_status << PAB_INTX_START,
+					   PAB_INTP_AMBA_MISC_STAT);
 			}
 		} while ((shifted_status >> PAB_INTX_START) != 0);
 	}
@@ -375,8 +379,7 @@ static void mobiveil_pcie_isr(struct irq_desc *desc)
 
 	/* handle MSI interrupts */
 	while (msi_status & 1) {
-		msi_data = readl_relaxed(pcie->apb_csr_base
-				+ MSI_DATA_OFFSET);
+		msi_data = readl_relaxed(pcie->apb_csr_base + MSI_DATA_OFFSET);
 
 		/*
 		 * MSI_STATUS_OFFSET register gets updated to zero
@@ -385,18 +388,18 @@ static void mobiveil_pcie_isr(struct irq_desc *desc)
 		 * two dummy reads.
 		 */
 		msi_addr_lo = readl_relaxed(pcie->apb_csr_base +
-				MSI_ADDR_L_OFFSET);
+					    MSI_ADDR_L_OFFSET);
 		msi_addr_hi = readl_relaxed(pcie->apb_csr_base +
-				MSI_ADDR_H_OFFSET);
+					    MSI_ADDR_H_OFFSET);
 		dev_dbg(dev, "MSI registers, data: %08x, addr: %08x:%08x\n",
-				msi_data, msi_addr_hi, msi_addr_lo);
+			msi_data, msi_addr_hi, msi_addr_lo);
 
 		virq = irq_find_mapping(msi->dev_domain, msi_data);
 		if (virq)
 			generic_handle_irq(virq);
 
 		msi_status = readl_relaxed(pcie->apb_csr_base +
-				MSI_STATUS_OFFSET);
+					   MSI_STATUS_OFFSET);
 	}
 
 	/* Clear the interrupt status */
@@ -413,7 +416,7 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie)
 
 	/* map config resource */
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
-			"config_axi_slave");
+					   "config_axi_slave");
 	pcie->config_axi_slave_base = devm_pci_remap_cfg_resource(dev, res);
 	if (IS_ERR(pcie->config_axi_slave_base))
 		return PTR_ERR(pcie->config_axi_slave_base);
@@ -421,7 +424,7 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie)
 
 	/* map csr resource */
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
-			"csr_axi_slave");
+					   "csr_axi_slave");
 	pcie->csr_axi_slave_base = devm_pci_remap_cfg_resource(dev, res);
 	if (IS_ERR(pcie->csr_axi_slave_base))
 		return PTR_ERR(pcie->csr_axi_slave_base);
@@ -452,7 +455,7 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie)
 }
 
 static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num,
-		int pci_addr, u32 type, u64 size)
+			       int pci_addr, u32 type, u64 size)
 {
 	int pio_ctrl_val;
 	int amap_ctrl_dw;
@@ -465,19 +468,20 @@ static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num,
 	}
 
 	pio_ctrl_val = csr_readl(pcie, PAB_PEX_PIO_CTRL);
-	csr_writel(pcie,
-		pio_ctrl_val | (1 << PIO_ENABLE_SHIFT), PAB_PEX_PIO_CTRL);
-	amap_ctrl_dw = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num));
-	amap_ctrl_dw = (amap_ctrl_dw | (type << AMAP_CTRL_TYPE_SHIFT));
-	amap_ctrl_dw = (amap_ctrl_dw | (1 << AMAP_CTRL_EN_SHIFT));
+	pio_ctrl_val |= 1 << PIO_ENABLE_SHIFT;
+	csr_writel(pcie, pio_ctrl_val, PAB_PEX_PIO_CTRL);
 
-	csr_writel(pcie, amap_ctrl_dw | lower_32_bits(size64),
-		   PAB_PEX_AMAP_CTRL(win_num));
+	amap_ctrl_dw = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num));
+	amap_ctrl_dw |= (type << AMAP_CTRL_TYPE_SHIFT) |
+			(1 << AMAP_CTRL_EN_SHIFT) |
+			lower_32_bits(size64);
+	csr_writel(pcie, amap_ctrl_dw, PAB_PEX_AMAP_CTRL(win_num));
 
 	csr_writel(pcie, upper_32_bits(size64),
 		   PAB_EXT_PEX_AMAP_SIZEN(win_num));
 
 	csr_writel(pcie, pci_addr, PAB_PEX_AMAP_AXI_WIN(win_num));
+
 	csr_writel(pcie, pci_addr, PAB_PEX_AMAP_PEX_WIN_L(win_num));
 	csr_writel(pcie, 0, PAB_PEX_AMAP_PEX_WIN_H(win_num));
 }
@@ -486,7 +490,8 @@ static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num,
  * routine to program the outbound windows
  */
 static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num,
-		u64 cpu_addr, u64 pci_addr, u32 config_io_bit, u64 size)
+			       u64 cpu_addr, u64 pci_addr,
+			       u32 config_io_bit, u64 size)
 {
 
 	u32 value, type;
@@ -505,7 +510,7 @@ static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num,
 	type = config_io_bit;
 	value = csr_readl(pcie, PAB_AXI_AMAP_CTRL(win_num));
 	csr_writel(pcie, 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT |
-			lower_32_bits(size64), PAB_AXI_AMAP_CTRL(win_num));
+		   lower_32_bits(size64), PAB_AXI_AMAP_CTRL(win_num));
 
 	csr_writel(pcie, upper_32_bits(size64), PAB_EXT_AXI_AMAP_SIZE(win_num));
 
@@ -515,14 +520,14 @@ static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num,
 	 */
 	value = csr_readl(pcie, PAB_AXI_AMAP_AXI_WIN(win_num));
 	csr_writel(pcie, cpu_addr & (~AXI_WINDOW_ALIGN_MASK),
-			PAB_AXI_AMAP_AXI_WIN(win_num));
+		   PAB_AXI_AMAP_AXI_WIN(win_num));
 
 	value = csr_readl(pcie, PAB_AXI_AMAP_PEX_WIN_H(win_num));
 
 	csr_writel(pcie, lower_32_bits(pci_addr),
-			PAB_AXI_AMAP_PEX_WIN_L(win_num));
+		   PAB_AXI_AMAP_PEX_WIN_L(win_num));
 	csr_writel(pcie, upper_32_bits(pci_addr),
-			PAB_AXI_AMAP_PEX_WIN_H(win_num));
+		   PAB_AXI_AMAP_PEX_WIN_H(win_num));
 
 	pcie->ob_wins_configured++;
 }
@@ -538,7 +543,9 @@ static int mobiveil_bringup_link(struct mobiveil_pcie *pcie)
 
 		usleep_range(LINK_WAIT_MIN, LINK_WAIT_MAX);
 	}
+
 	dev_err(&pcie->pdev->dev, "link never came up\n");
+
 	return -ETIMEDOUT;
 }
 
@@ -551,16 +558,16 @@ static void mobiveil_pcie_enable_msi(struct mobiveil_pcie *pcie)
 	msi->msi_pages_phys = (phys_addr_t)msg_addr;
 
 	writel_relaxed(lower_32_bits(msg_addr),
-		pcie->apb_csr_base + MSI_BASE_LO_OFFSET);
+		       pcie->apb_csr_base + MSI_BASE_LO_OFFSET);
 	writel_relaxed(upper_32_bits(msg_addr),
-		pcie->apb_csr_base + MSI_BASE_HI_OFFSET);
+		       pcie->apb_csr_base + MSI_BASE_HI_OFFSET);
 	writel_relaxed(4096, pcie->apb_csr_base + MSI_SIZE_OFFSET);
 	writel_relaxed(1, pcie->apb_csr_base + MSI_ENABLE_OFFSET);
 }
 
 static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 {
-	u32 value, pab_ctrl, type = 0;
+	u32 value, pab_ctrl, type;
 	int err;
 	struct resource_entry *win, *tmp;
 
@@ -575,26 +582,27 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 	 * Space
 	 */
 	value = csr_readl(pcie, PCI_COMMAND);
-	csr_writel(pcie, value | PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
-		PCI_COMMAND_MASTER, PCI_COMMAND);
+	value |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
+	csr_writel(pcie, value, PCI_COMMAND);
 
 	/*
 	 * program PIO Enable Bit to 1 (and PEX PIO Enable to 1) in PAB_CTRL
 	 * register
 	 */
 	pab_ctrl = csr_readl(pcie, PAB_CTRL);
-	csr_writel(pcie, pab_ctrl | (1 << AMBA_PIO_ENABLE_SHIFT) |
-		(1 << PEX_PIO_ENABLE_SHIFT), PAB_CTRL);
+	pab_ctrl |= (1 << AMBA_PIO_ENABLE_SHIFT) | (1 << PEX_PIO_ENABLE_SHIFT);
+	csr_writel(pcie, pab_ctrl, PAB_CTRL);
 
 	csr_writel(pcie, (PAB_INTP_INTX_MASK | PAB_INTP_MSI_MASK),
-		PAB_INTP_AMBA_MISC_ENB);
+		   PAB_INTP_AMBA_MISC_ENB);
 
 	/*
 	 * program PIO Enable Bit to 1 and Config Window Enable Bit to 1 in
 	 * PAB_AXI_PIO_CTRL Register
 	 */
 	value = csr_readl(pcie, PAB_AXI_PIO_CTRL);
-	csr_writel(pcie, value | APIO_EN_MASK, PAB_AXI_PIO_CTRL);
+	value |= APIO_EN_MASK;
+	csr_writel(pcie, value, PAB_AXI_PIO_CTRL);
 
 	/*
 	 * we'll program one outbound window for config reads and
@@ -605,25 +613,25 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 
 	/* config outbound translation window */
 	program_ob_windows(pcie, pcie->ob_wins_configured,
-			pcie->ob_io_res->start, 0, CFG_WINDOW_TYPE,
-			resource_size(pcie->ob_io_res));
+			   pcie->ob_io_res->start, 0, CFG_WINDOW_TYPE,
+			   resource_size(pcie->ob_io_res));
 
 	/* memory inbound translation window */
 	program_ib_windows(pcie, WIN_NUM_1, 0, MEM_WINDOW_TYPE, IB_WIN_SIZE);
 
 	/* Get the I/O and memory ranges from DT */
 	resource_list_for_each_entry_safe(win, tmp, &pcie->resources) {
-		type = 0;
 		if (resource_type(win->res) == IORESOURCE_MEM)
 			type = MEM_WINDOW_TYPE;
-		if (resource_type(win->res) == IORESOURCE_IO)
+		else if (resource_type(win->res) == IORESOURCE_IO)
 			type = IO_WINDOW_TYPE;
-		if (type) {
-			/* configure outbound translation window */
-			program_ob_windows(pcie, pcie->ob_wins_configured,
-				win->res->start, 0, type,
-				resource_size(win->res));
-		}
+		else
+			continue;
+
+		/* configure outbound translation window */
+		program_ob_windows(pcie, pcie->ob_wins_configured,
+				   win->res->start, 0, type,
+				   resource_size(win->res));
 	}
 
 	/* setup MSI hardware registers */
@@ -643,7 +651,8 @@ static void mobiveil_mask_intx_irq(struct irq_data *data)
 	mask = 1 << ((data->hwirq + PAB_INTX_START) - 1);
 	raw_spin_lock_irqsave(&pcie->intx_mask_lock, flags);
 	shifted_val = csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB);
-	csr_writel(pcie, (shifted_val & (~mask)), PAB_INTP_AMBA_MISC_ENB);
+	shifted_val &= ~mask;
+	csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB);
 	raw_spin_unlock_irqrestore(&pcie->intx_mask_lock, flags);
 }
 
@@ -658,7 +667,8 @@ static void mobiveil_unmask_intx_irq(struct irq_data *data)
 	mask = 1 << ((data->hwirq + PAB_INTX_START) - 1);
 	raw_spin_lock_irqsave(&pcie->intx_mask_lock, flags);
 	shifted_val = csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB);
-	csr_writel(pcie, (shifted_val | mask), PAB_INTP_AMBA_MISC_ENB);
+	shifted_val |= mask;
+	csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB);
 	raw_spin_unlock_irqrestore(&pcie->intx_mask_lock, flags);
 }
 
@@ -672,10 +682,11 @@ static struct irq_chip intx_irq_chip = {
 
 /* routine to setup the INTx related data */
 static int mobiveil_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
-		irq_hw_number_t hwirq)
+				  irq_hw_number_t hwirq)
 {
 	irq_set_chip_and_handler(irq, &intx_irq_chip, handle_level_irq);
 	irq_set_chip_data(irq, domain->host_data);
+
 	return 0;
 }
 
@@ -692,7 +703,7 @@ static struct irq_chip mobiveil_msi_irq_chip = {
 
 static struct msi_domain_info mobiveil_msi_domain_info = {
 	.flags	= (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
-		MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX),
+		   MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX),
 	.chip	= &mobiveil_msi_irq_chip,
 };
 
@@ -710,7 +721,7 @@ static void mobiveil_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
 }
 
 static int mobiveil_msi_set_affinity(struct irq_data *irq_data,
-		const struct cpumask *mask, bool force)
+				     const struct cpumask *mask, bool force)
 {
 	return -EINVAL;
 }
@@ -722,7 +733,8 @@ static struct irq_chip mobiveil_msi_bottom_irq_chip = {
 };
 
 static int mobiveil_irq_msi_domain_alloc(struct irq_domain *domain,
-		unsigned int virq, unsigned int nr_irqs, void *args)
+					 unsigned int virq,
+					 unsigned int nr_irqs, void *args)
 {
 	struct mobiveil_pcie *pcie = domain->host_data;
 	struct mobiveil_msi *msi = &pcie->msi;
@@ -742,13 +754,13 @@ static int mobiveil_irq_msi_domain_alloc(struct irq_domain *domain,
 	mutex_unlock(&msi->lock);
 
 	irq_domain_set_info(domain, virq, bit, &mobiveil_msi_bottom_irq_chip,
-				domain->host_data, handle_level_irq,
-				NULL, NULL);
+			    domain->host_data, handle_level_irq, NULL, NULL);
 	return 0;
 }
 
 static void mobiveil_irq_msi_domain_free(struct irq_domain *domain,
-		unsigned int virq, unsigned int nr_irqs)
+					 unsigned int virq,
+					 unsigned int nr_irqs)
 {
 	struct irq_data *d = irq_domain_get_irq_data(domain, virq);
 	struct mobiveil_pcie *pcie = irq_data_get_irq_chip_data(d);
@@ -756,12 +768,11 @@ static void mobiveil_irq_msi_domain_free(struct irq_domain *domain,
 
 	mutex_lock(&msi->lock);
 
-	if (!test_bit(d->hwirq, msi->msi_irq_in_use)) {
+	if (!test_bit(d->hwirq, msi->msi_irq_in_use))
 		dev_err(&pcie->pdev->dev, "trying to free unused MSI#%lu\n",
 			d->hwirq);
-	} else {
+	else
 		__clear_bit(d->hwirq, msi->msi_irq_in_use);
-	}
 
 	mutex_unlock(&msi->lock);
 }
@@ -785,12 +796,14 @@ static int mobiveil_allocate_msi_domains(struct mobiveil_pcie *pcie)
 	}
 
 	msi->msi_domain = pci_msi_create_irq_domain(fwnode,
-				&mobiveil_msi_domain_info, msi->dev_domain);
+						    &mobiveil_msi_domain_info,
+						    msi->dev_domain);
 	if (!msi->msi_domain) {
 		dev_err(dev, "failed to create MSI domain\n");
 		irq_domain_remove(msi->dev_domain);
 		return -ENOMEM;
 	}
+
 	return 0;
 }
 
@@ -801,8 +814,8 @@ static int mobiveil_pcie_init_irq_domain(struct mobiveil_pcie *pcie)
 	int ret;
 
 	/* setup INTx */
-	pcie->intx_domain = irq_domain_add_linear(node,
-				PCI_NUM_INTX, &intx_domain_ops, pcie);
+	pcie->intx_domain = irq_domain_add_linear(node, PCI_NUM_INTX,
+						  &intx_domain_ops, pcie);
 
 	if (!pcie->intx_domain) {
 		dev_err(dev, "Failed to get a INTx IRQ domain\n");
@@ -917,10 +930,10 @@ MODULE_DEVICE_TABLE(of, mobiveil_pcie_of_match);
 static struct platform_driver mobiveil_pcie_driver = {
 	.probe = mobiveil_pcie_probe,
 	.driver = {
-			.name = "mobiveil-pcie",
-			.of_match_table = mobiveil_pcie_of_match,
-			.suppress_bind_attrs = true,
-		},
+		.name = "mobiveil-pcie",
+		.of_match_table = mobiveil_pcie_of_match,
+		.suppress_bind_attrs = true,
+	},
 };
 
 builtin_platform_driver(mobiveil_pcie_driver);
-- 
2.17.1

[PATCH 03/23] PCI: mobiveil: correct the returned error number

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

This patch corrected the returned error number by convention,
and removed a unnecessary error check.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 drivers/pci/controller/pcie-mobiveil.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index b87471f08a40..563210e731d3 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -819,7 +819,7 @@ static int mobiveil_pcie_init_irq_domain(struct mobiveil_pcie *pcie)
 
 	if (!pcie->intx_domain) {
 		dev_err(dev, "Failed to get a INTx IRQ domain\n");
-		return -ENODEV;
+		return -ENOMEM;
 	}
 
 	raw_spin_lock_init(&pcie->intx_mask_lock);
@@ -845,11 +845,9 @@ static int mobiveil_pcie_probe(struct platform_device *pdev)
 	/* allocate the PCIe port */
 	bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
 	if (!bridge)
-		return -ENODEV;
+		return -ENOMEM;
 
 	pcie = pci_host_bridge_priv(bridge);
-	if (!pcie)
-		return -ENOMEM;
 
 	pcie->pdev = pdev;
 
@@ -866,7 +864,7 @@ static int mobiveil_pcie_probe(struct platform_device *pdev)
 						    &pcie->resources, &iobase);
 	if (ret) {
 		dev_err(dev, "Getting bridge resources failed\n");
-		return -ENOMEM;
+		return ret;
 	}
 
 	/*
-- 
2.17.1

[PATCH 04/23] PCI: mobiveil: remove flag MSI_FLAG_MULTI_PCI_MSI

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

The current code does not support multiple MSIs, so remove
the corresponding flag from the msi_domain_info structure.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 drivers/pci/controller/pcie-mobiveil.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index 563210e731d3..a0dd337c6214 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -703,7 +703,7 @@ static struct irq_chip mobiveil_msi_irq_chip = {
 
 static struct msi_domain_info mobiveil_msi_domain_info = {
 	.flags	= (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
-		   MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX),
+		   MSI_FLAG_PCI_MSIX),
 	.chip	= &mobiveil_msi_irq_chip,
 };
 
-- 
2.17.1

[PATCH 05/23] PCI: mobiveil: correct PCI base address in MEM/IO outbound windows

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

It should get PCI base address from the DT node property 'ranges'
to setup MEM/IO outbound windows instead of always zero.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 drivers/pci/controller/pcie-mobiveil.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index a0dd337c6214..8ff873023b5f 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -630,8 +630,9 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 
 		/* configure outbound translation window */
 		program_ob_windows(pcie, pcie->ob_wins_configured,
-				   win->res->start, 0, type,
-				   resource_size(win->res));
+				   win->res->start,
+				   win->res->start - win->offset,
+				   type, resource_size(win->res));
 	}
 
 	/* setup MSI hardware registers */
-- 
2.17.1

[PATCH 06/23] PCI: mobiveil: replace the resource list iteration function

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

As it won't delete any node in this iteration, replaced
the function resource_list_for_each_entry_safe() with
the resource_list_for_each_entry().

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 drivers/pci/controller/pcie-mobiveil.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index 8ff873023b5f..b2cc9c097fc9 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -569,7 +569,7 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 {
 	u32 value, pab_ctrl, type;
 	int err;
-	struct resource_entry *win, *tmp;
+	struct resource_entry *win;
 
 	err = mobiveil_bringup_link(pcie);
 	if (err) {
@@ -620,7 +620,7 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 	program_ib_windows(pcie, WIN_NUM_1, 0, MEM_WINDOW_TYPE, IB_WIN_SIZE);
 
 	/* Get the I/O and memory ranges from DT */
-	resource_list_for_each_entry_safe(win, tmp, &pcie->resources) {
+	resource_list_for_each_entry(win, &pcie->resources) {
 		if (resource_type(win->res) == IORESOURCE_MEM)
 			type = MEM_WINDOW_TYPE;
 		else if (resource_type(win->res) == IORESOURCE_IO)
-- 
2.17.1

[PATCH 07/23] PCI: mobiveil: use WIN_NUM_0 explicitly for CFG outbound window

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

As the .map_bus() use the WIN_NUM_0 for CFG transactions,
it's better passing WIN_NUM_0 explicitly when initialize
the CFG outbound window.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 drivers/pci/controller/pcie-mobiveil.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index b2cc9c097fc9..df71c11b4810 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -612,9 +612,8 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 	 */
 
 	/* config outbound translation window */
-	program_ob_windows(pcie, pcie->ob_wins_configured,
-			   pcie->ob_io_res->start, 0, CFG_WINDOW_TYPE,
-			   resource_size(pcie->ob_io_res));
+	program_ob_windows(pcie, WIN_NUM_0, pcie->ob_io_res->start, 0,
+			   CFG_WINDOW_TYPE, resource_size(pcie->ob_io_res));
 
 	/* memory inbound translation window */
 	program_ib_windows(pcie, WIN_NUM_1, 0, MEM_WINDOW_TYPE, IB_WIN_SIZE);
-- 
2.17.1

[PATCH 08/23] PCI: mobiveil: use the 1st inbound window for MEM inbound transactions

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

The inbound windows have different register set with outbound windows.
This patch change the MEM inbound window to the first one.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 drivers/pci/controller/pcie-mobiveil.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index df71c11b4810..e88afc792a5c 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -616,7 +616,7 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 			   CFG_WINDOW_TYPE, resource_size(pcie->ob_io_res));
 
 	/* memory inbound translation window */
-	program_ib_windows(pcie, WIN_NUM_1, 0, MEM_WINDOW_TYPE, IB_WIN_SIZE);
+	program_ib_windows(pcie, WIN_NUM_0, 0, MEM_WINDOW_TYPE, IB_WIN_SIZE);
 
 	/* Get the I/O and memory ranges from DT */
 	resource_list_for_each_entry(win, &pcie->resources) {
-- 
2.17.1

[PATCH 09/23] PCI: mobiveil: correct the inbound/outbound window setup routine

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

Outbound window routine:
 - Removed unused var definition and register read operations.
 - Added the upper 32-bit cpu address setup of the window.
 - Instead of blindly write, only change the fields specified.
 - Masked the lower bits of window size in case override the
   control bits.
 - Check if the passing window number is available, instead of
   the total number of the initialized windows.

Inbound window routine:
 - Added parameter 'u64 cpu_addr' to specify the cpu address
   of the window instead of using 'pci_addr'.
 - Changed 'int pci_addr' to 'u64 pci_addr', and added setup
   of the upper 32-bit pci address of the window.
 - Moved the PCIe PIO master enablement to mobiveil_host_init().
 - Instead of blindly write, only change the fields specified.
 - Masked the lower bits of window size in case override the
   control bits.
 - Check if the passing window number is available, instead of
   the total number of the initialized windows.
 - And added the statistic of initialized inbound windows.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 drivers/pci/controller/pcie-mobiveil.c | 69 +++++++++++++++-----------
 1 file changed, 41 insertions(+), 28 deletions(-)

diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index e88afc792a5c..d03392940944 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -65,9 +65,13 @@
 #define PAB_AXI_AMAP_CTRL(win)		PAB_REG_ADDR(0x0ba0, win)
 #define  WIN_ENABLE_SHIFT		0
 #define  WIN_TYPE_SHIFT			1
+#define  WIN_TYPE_MASK			0x3
+#define  WIN_SIZE_SHIFT			10
+#define  WIN_SIZE_MASK			0x3fffff
 
 #define PAB_EXT_AXI_AMAP_SIZE(win)	PAB_EXT_REG_ADDR(0xbaf0, win)
 
+#define PAB_EXT_AXI_AMAP_AXI_WIN(win)	PAB_EXT_REG_ADDR(0x80a0, win)
 #define PAB_AXI_AMAP_AXI_WIN(win)	PAB_REG_ADDR(0x0ba4, win)
 #define  AXI_WINDOW_ALIGN_MASK		3
 
@@ -82,8 +86,10 @@
 #define PAB_PEX_AMAP_CTRL(win)		PAB_REG_ADDR(0x4ba0, win)
 #define  AMAP_CTRL_EN_SHIFT		0
 #define  AMAP_CTRL_TYPE_SHIFT		1
+#define  AMAP_CTRL_TYPE_MASK		3
 
 #define PAB_EXT_PEX_AMAP_SIZEN(win)	PAB_EXT_REG_ADDR(0xbef0, win)
+#define PAB_EXT_PEX_AMAP_AXI_WIN(win)	PAB_EXT_REG_ADDR(0xb4a0, win)
 #define PAB_PEX_AMAP_AXI_WIN(win)	PAB_REG_ADDR(0x4ba4, win)
 #define PAB_PEX_AMAP_PEX_WIN_L(win)	PAB_REG_ADDR(0x4ba8, win)
 #define PAB_PEX_AMAP_PEX_WIN_H(win)	PAB_REG_ADDR(0x4bac, win)
@@ -455,49 +461,50 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie)
 }
 
 static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num,
-			       int pci_addr, u32 type, u64 size)
+			       u64 cpu_addr, u64 pci_addr, u32 type, u64 size)
 {
-	int pio_ctrl_val;
-	int amap_ctrl_dw;
+	u32 value;
 	u64 size64 = ~(size - 1);
 
-	if ((pcie->ib_wins_configured + 1) > pcie->ppio_wins) {
+	if (win_num >= pcie->ppio_wins) {
 		dev_err(&pcie->pdev->dev,
 			"ERROR: max inbound windows reached !\n");
 		return;
 	}
 
-	pio_ctrl_val = csr_readl(pcie, PAB_PEX_PIO_CTRL);
-	pio_ctrl_val |= 1 << PIO_ENABLE_SHIFT;
-	csr_writel(pcie, pio_ctrl_val, PAB_PEX_PIO_CTRL);
-
-	amap_ctrl_dw = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num));
-	amap_ctrl_dw |= (type << AMAP_CTRL_TYPE_SHIFT) |
-			(1 << AMAP_CTRL_EN_SHIFT) |
-			lower_32_bits(size64);
-	csr_writel(pcie, amap_ctrl_dw, PAB_PEX_AMAP_CTRL(win_num));
+	value = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num));
+	value &= ~(AMAP_CTRL_TYPE_MASK << AMAP_CTRL_TYPE_SHIFT);
+	value |= (type << AMAP_CTRL_TYPE_SHIFT) | (1 << AMAP_CTRL_EN_SHIFT) |
+		 (lower_32_bits(size64) & WIN_SIZE_MASK << WIN_SIZE_SHIFT);
+	csr_writel(pcie, value, PAB_PEX_AMAP_CTRL(win_num));
 
 	csr_writel(pcie, upper_32_bits(size64),
 		   PAB_EXT_PEX_AMAP_SIZEN(win_num));
 
-	csr_writel(pcie, pci_addr, PAB_PEX_AMAP_AXI_WIN(win_num));
+	csr_writel(pcie, lower_32_bits(cpu_addr),
+		   PAB_PEX_AMAP_AXI_WIN(win_num));
+	csr_writel(pcie, upper_32_bits(cpu_addr),
+		   PAB_EXT_PEX_AMAP_AXI_WIN(win_num));
+
+	csr_writel(pcie, lower_32_bits(pci_addr),
+		   PAB_PEX_AMAP_PEX_WIN_L(win_num));
+	csr_writel(pcie, upper_32_bits(pci_addr),
+		   PAB_PEX_AMAP_PEX_WIN_H(win_num));
 
-	csr_writel(pcie, pci_addr, PAB_PEX_AMAP_PEX_WIN_L(win_num));
-	csr_writel(pcie, 0, PAB_PEX_AMAP_PEX_WIN_H(win_num));
+	pcie->ib_wins_configured++;
 }
 
 /*
  * routine to program the outbound windows
  */
 static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num,
-			       u64 cpu_addr, u64 pci_addr,
-			       u32 config_io_bit, u64 size)
+			       u64 cpu_addr, u64 pci_addr, u32 type, u64 size)
 {
 
-	u32 value, type;
+	u32 value;
 	u64 size64 = ~(size - 1);
 
-	if ((pcie->ob_wins_configured + 1) > pcie->apio_wins) {
+	if (win_num  >= pcie->apio_wins) {
 		dev_err(&pcie->pdev->dev,
 			"ERROR: max outbound windows reached !\n");
 		return;
@@ -507,10 +514,12 @@ static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num,
 	 * program Enable Bit to 1, Type Bit to (00) base 2, AXI Window Size Bit
 	 * to 4 KB in PAB_AXI_AMAP_CTRL register
 	 */
-	type = config_io_bit;
 	value = csr_readl(pcie, PAB_AXI_AMAP_CTRL(win_num));
-	csr_writel(pcie, 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT |
-		   lower_32_bits(size64), PAB_AXI_AMAP_CTRL(win_num));
+	value &= ~(WIN_TYPE_MASK << WIN_TYPE_SHIFT |
+		 WIN_SIZE_MASK << WIN_SIZE_SHIFT);
+	value |= 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT |
+		 (lower_32_bits(size64) & WIN_SIZE_MASK << WIN_SIZE_SHIFT);
+	csr_writel(pcie, value, PAB_AXI_AMAP_CTRL(win_num));
 
 	csr_writel(pcie, upper_32_bits(size64), PAB_EXT_AXI_AMAP_SIZE(win_num));
 
@@ -518,11 +527,10 @@ static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num,
 	 * program AXI window base with appropriate value in
 	 * PAB_AXI_AMAP_AXI_WIN0 register
 	 */
-	value = csr_readl(pcie, PAB_AXI_AMAP_AXI_WIN(win_num));
-	csr_writel(pcie, cpu_addr & (~AXI_WINDOW_ALIGN_MASK),
+	csr_writel(pcie, lower_32_bits(cpu_addr) & (~AXI_WINDOW_ALIGN_MASK),
 		   PAB_AXI_AMAP_AXI_WIN(win_num));
-
-	value = csr_readl(pcie, PAB_AXI_AMAP_PEX_WIN_H(win_num));
+	csr_writel(pcie, upper_32_bits(cpu_addr),
+		   PAB_EXT_AXI_AMAP_AXI_WIN(win_num));
 
 	csr_writel(pcie, lower_32_bits(pci_addr),
 		   PAB_AXI_AMAP_PEX_WIN_L(win_num));
@@ -604,6 +612,11 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 	value |= APIO_EN_MASK;
 	csr_writel(pcie, value, PAB_AXI_PIO_CTRL);
 
+	/* Enable PCIe PIO master */
+	value = csr_readl(pcie, PAB_PEX_PIO_CTRL);
+	value |= 1 << PIO_ENABLE_SHIFT;
+	csr_writel(pcie, value, PAB_PEX_PIO_CTRL);
+
 	/*
 	 * we'll program one outbound window for config reads and
 	 * another default inbound window for all the upstream traffic
@@ -616,7 +629,7 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 			   CFG_WINDOW_TYPE, resource_size(pcie->ob_io_res));
 
 	/* memory inbound translation window */
-	program_ib_windows(pcie, WIN_NUM_0, 0, MEM_WINDOW_TYPE, IB_WIN_SIZE);
+	program_ib_windows(pcie, WIN_NUM_0, 0, 0, MEM_WINDOW_TYPE, IB_WIN_SIZE);
 
 	/* Get the I/O and memory ranges from DT */
 	resource_list_for_each_entry(win, &pcie->resources) {
-- 
2.17.1

[PATCH 10/23] PCI: mobiveil: fix the INTx process error

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

In the loop block, there is not code change the loop key,
this patch updated the loop key by re-read the INTx status
register.

This patch also change to clear the handled INTx status.

Note: Need MV to test this change.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 drivers/pci/controller/pcie-mobiveil.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index d03392940944..884c9f95374d 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -361,6 +361,7 @@ static void mobiveil_pcie_isr(struct irq_desc *desc)
 	/* Handle INTx */
 	if (intr_status & PAB_INTP_INTX_MASK) {
 		shifted_status = csr_readl(pcie, PAB_INTP_AMBA_MISC_STAT);
+		shifted_status &= PAB_INTP_INTX_MASK;
 		shifted_status >>= PAB_INTX_START;
 		do {
 			for_each_set_bit(bit, &shifted_status, PCI_NUM_INTX) {
@@ -372,12 +373,16 @@ static void mobiveil_pcie_isr(struct irq_desc *desc)
 					dev_err_ratelimited(dev, "unexpected IRQ, INT%d\n",
 							    bit);
 
-				/* clear interrupt */
-				csr_writel(pcie,
-					   shifted_status << PAB_INTX_START,
+				/* clear interrupt handled */
+				csr_writel(pcie, 1 << (PAB_INTX_START + bit),
 					   PAB_INTP_AMBA_MISC_STAT);
 			}
-		} while ((shifted_status >> PAB_INTX_START) != 0);
+
+			shifted_status = csr_readl(pcie,
+						   PAB_INTP_AMBA_MISC_STAT);
+			shifted_status &= PAB_INTP_INTX_MASK;
+			shifted_status >>= PAB_INTX_START;
+		} while (shifted_status != 0);
 	}
 
 	/* read extra MSI status register */
-- 
2.17.1

[PATCH 11/23] PCI: mobiveil: only fixup the Class Code field

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

Fixup the Class Code to PCI bridge, do not change the Revision ID.
And move the fixup to *_host_init function.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 drivers/pci/controller/pcie-mobiveil.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index 884c9f95374d..8e3630359597 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -652,6 +652,12 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 				   type, resource_size(win->res));
 	}
 
+	/* fixup for PCIe class register */
+	value = csr_readl(pcie, PAB_INTP_AXI_PIO_CLASS);
+	value &= 0xff;
+	value |= (PCI_CLASS_BRIDGE_PCI << 16);
+	csr_writel(pcie, value, PAB_INTP_AXI_PIO_CLASS);
+
 	/* setup MSI hardware registers */
 	mobiveil_pcie_enable_msi(pcie);
 
@@ -895,9 +901,6 @@ static int mobiveil_pcie_probe(struct platform_device *pdev)
 		goto error;
 	}
 
-	/* fixup for PCIe class register */
-	csr_writel(pcie, 0x060402ab, PAB_INTP_AXI_PIO_CLASS);
-
 	/* initialize the IRQ domains */
 	ret = mobiveil_pcie_init_irq_domain(pcie);
 	if (ret) {
-- 
2.17.1

[PATCH 12/23] PCI: mobiveil: move out the link up waiting from mobiveil_host_init

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

Host initial sequence does not depend on PCIe link up, so move it
to the place just before the enumeration.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 drivers/pci/controller/pcie-mobiveil.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index 8e3630359597..4b21b8549664 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -581,15 +581,8 @@ static void mobiveil_pcie_enable_msi(struct mobiveil_pcie *pcie)
 static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 {
 	u32 value, pab_ctrl, type;
-	int err;
 	struct resource_entry *win;
 
-	err = mobiveil_bringup_link(pcie);
-	if (err) {
-		dev_info(&pcie->pdev->dev, "link bring-up failed\n");
-		return err;
-	}
-
 	/*
 	 * program Bus Master Enable Bit in Command Register in PAB Config
 	 * Space
@@ -661,7 +654,7 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 	/* setup MSI hardware registers */
 	mobiveil_pcie_enable_msi(pcie);
 
-	return err;
+	return 0;
 }
 
 static void mobiveil_mask_intx_irq(struct irq_data *data)
@@ -921,6 +914,12 @@ static int mobiveil_pcie_probe(struct platform_device *pdev)
 	bridge->map_irq = of_irq_parse_and_map_pci;
 	bridge->swizzle_irq = pci_common_swizzle;
 
+	ret = mobiveil_bringup_link(pcie);
+	if (ret) {
+		dev_info(dev, "link bring-up failed\n");
+		goto error;
+	}
+
 	/* setup the kernel resources for the newly added PCIe root bus */
 	ret = pci_scan_root_bus_bridge(bridge);
 	if (ret)
-- 
2.17.1

[PATCH 13/23] PCI: mobiveil: move irq chained handler setup out of DT parse

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

Move irq_set_chained_handler_and_data() out of DT parse function.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 drivers/pci/controller/pcie-mobiveil.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index 4b21b8549664..3da924bb6b3c 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -460,8 +460,6 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie)
 		return -ENODEV;
 	}
 
-	irq_set_chained_handler_and_data(pcie->irq, mobiveil_pcie_isr, pcie);
-
 	return 0;
 }
 
@@ -901,6 +899,8 @@ static int mobiveil_pcie_probe(struct platform_device *pdev)
 		goto error;
 	}
 
+	irq_set_chained_handler_and_data(pcie->irq, mobiveil_pcie_isr, pcie);
+
 	ret = devm_request_pci_bus_resources(dev, &pcie->resources);
 	if (ret)
 		goto error;
-- 
2.17.1

[PATCH 14/23] PCI: mobiveil: initialize Primary/Secondary/Subordinate bus number

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

The reset value is all zero, so set a workable value for Primary,
Secondary and Subordinate bus numbers.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 drivers/pci/controller/pcie-mobiveil.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index 3da924bb6b3c..8d6a1e98f655 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -581,6 +581,12 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 	u32 value, pab_ctrl, type;
 	struct resource_entry *win;
 
+	/* setup bus numbers */
+	value = csr_readl(pcie, PCI_PRIMARY_BUS);
+	value &= 0xff000000;
+	value |= 0x00ff0100;
+	csr_writel(pcie, value, PCI_PRIMARY_BUS);
+
 	/*
 	 * program Bus Master Enable Bit in Command Register in PAB Config
 	 * Space
-- 
2.17.1

[PATCH 15/23] dt-bindings: pci: mobiveil: change gpio_slave and apb_csr to optional

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

Change the "gpio_slave" and "apb_csr" to optional, the "gpio_slave"
is not used in current code, and "apb_csr" is not used by some
platorms.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 Documentation/devicetree/bindings/pci/mobiveil-pcie.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/mobiveil-pcie.txt b/Documentation/devicetree/bindings/pci/mobiveil-pcie.txt
index a618d4787dd7..64156993e052 100644
--- a/Documentation/devicetree/bindings/pci/mobiveil-pcie.txt
+++ b/Documentation/devicetree/bindings/pci/mobiveil-pcie.txt
@@ -10,8 +10,10 @@ Required properties:
 	interrupt source. The value must be 1.
 - compatible: Should contain "mbvl,gpex40-pcie"
 - reg: Should contain PCIe registers location and length
+	Mandatory:
 	"config_axi_slave": PCIe controller registers
 	"csr_axi_slave"	  : Bridge config registers
+	Optional:
 	"gpio_slave"	  : GPIO registers to control slot power
 	"apb_csr"	  : MSI registers
 
-- 
2.17.1

[PATCH 16/23] PCI: mobiveil: refactor the Mobiveil driver

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

As the Mobiveil PCIe controller support RC&EP DAUL mode, and to
make Platforms which integrated the Mobiveil PCIe IP more easy
to add their drivers, this patch moved the Mobiveil driver to
a new directory 'drivers/pci/controller/mobiveil' and refactored
it to different file according to the abstraction of RC&EP(TODO).

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 MAINTAINERS                                   |   2 +-
 drivers/pci/controller/Kconfig                |  11 +-
 drivers/pci/controller/Makefile               |   2 +-
 drivers/pci/controller/mobiveil/Kconfig       |  24 +
 drivers/pci/controller/mobiveil/Makefile      |   4 +
 .../pcie-mobiveil-host.c}                     | 520 +++---------------
 .../controller/mobiveil/pcie-mobiveil-plat.c  |  54 ++
 .../pci/controller/mobiveil/pcie-mobiveil.c   | 227 ++++++++
 .../pci/controller/mobiveil/pcie-mobiveil.h   | 187 +++++++
 9 files changed, 582 insertions(+), 449 deletions(-)
 create mode 100644 drivers/pci/controller/mobiveil/Kconfig
 create mode 100644 drivers/pci/controller/mobiveil/Makefile
 rename drivers/pci/controller/{pcie-mobiveil.c => mobiveil/pcie-mobiveil-host.c} (55%)
 create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil-plat.c
 create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil.c
 create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil.h

diff --git a/MAINTAINERS b/MAINTAINERS
index e8e817818656..0c57ccff3188 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11294,7 +11294,7 @@ M:	Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
 L:	linux-pci@vger.kernel.org
 S:	Supported
 F:	Documentation/devicetree/bindings/pci/mobiveil-pcie.txt
-F:	drivers/pci/controller/pcie-mobiveil.c
+F:	drivers/pci/controller/mobiveil/pcie-mobiveil*
 
 PCI DRIVER FOR MVEBU (Marvell Armada 370 and Armada XP SOC support)
 M:	Thomas Petazzoni <thomas.petazzoni@bootlin.com>
diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
index 028b287466fb..e06c386405ad 100644
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -239,16 +239,6 @@ config PCIE_MEDIATEK
 	  Say Y here if you want to enable PCIe controller support on
 	  MediaTek SoCs.
 
-config PCIE_MOBIVEIL
-	bool "Mobiveil AXI PCIe controller"
-	depends on ARCH_ZYNQMP || COMPILE_TEST
-	depends on OF
-	depends on PCI_MSI_IRQ_DOMAIN
-	help
-	  Say Y here if you want to enable support for the Mobiveil AXI PCIe
-	  Soft IP. It has up to 8 outbound and inbound windows
-	  for address translation and it is a PCIe Gen4 IP.
-
 config PCIE_TANGO_SMP8759
 	bool "Tango SMP8759 PCIe controller (DANGEROUS)"
 	depends on ARCH_TANGO && PCI_MSI && OF
@@ -279,4 +269,5 @@ config VMD
 	  module will be called vmd.
 
 source "drivers/pci/controller/dwc/Kconfig"
+source "drivers/pci/controller/mobiveil/Kconfig"
 endmenu
diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile
index d56a507495c5..b79a615041a0 100644
--- a/drivers/pci/controller/Makefile
+++ b/drivers/pci/controller/Makefile
@@ -26,11 +26,11 @@ obj-$(CONFIG_PCIE_ROCKCHIP) += pcie-rockchip.o
 obj-$(CONFIG_PCIE_ROCKCHIP_EP) += pcie-rockchip-ep.o
 obj-$(CONFIG_PCIE_ROCKCHIP_HOST) += pcie-rockchip-host.o
 obj-$(CONFIG_PCIE_MEDIATEK) += pcie-mediatek.o
-obj-$(CONFIG_PCIE_MOBIVEIL) += pcie-mobiveil.o
 obj-$(CONFIG_PCIE_TANGO_SMP8759) += pcie-tango.o
 obj-$(CONFIG_VMD) += vmd.o
 # pcie-hisi.o quirks are needed even without CONFIG_PCIE_DW
 obj-y				+= dwc/
+obj-y				+= mobiveil/
 
 
 # The following drivers are for devices that use the generic ACPI
diff --git a/drivers/pci/controller/mobiveil/Kconfig b/drivers/pci/controller/mobiveil/Kconfig
new file mode 100644
index 000000000000..64343c07bfed
--- /dev/null
+++ b/drivers/pci/controller/mobiveil/Kconfig
@@ -0,0 +1,24 @@
+# SPDX-License-Identifier: GPL-2.0
+
+menu "Mobiveil PCIe Core Support"
+	depends on PCI
+
+config PCIE_MOBIVEIL
+	bool
+
+config PCIE_MOBIVEIL_HOST
+        bool
+	depends on PCI_MSI_IRQ_DOMAIN
+        select PCIE_MOBIVEIL
+
+config PCIE_MOBIVEIL_PLAT
+	bool "Mobiveil AXI PCIe controller"
+	depends on ARCH_ZYNQMP || COMPILE_TEST
+	depends on OF
+	select PCIE_MOBIVEIL_HOST
+	help
+	  Say Y here if you want to enable support for the Mobiveil AXI PCIe
+	  Soft IP. It has up to 8 outbound and inbound windows
+	  for address translation and it is a PCIe Gen4 IP.
+
+endmenu
diff --git a/drivers/pci/controller/mobiveil/Makefile b/drivers/pci/controller/mobiveil/Makefile
new file mode 100644
index 000000000000..9fb6d1c6504d
--- /dev/null
+++ b/drivers/pci/controller/mobiveil/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_PCIE_MOBIVEIL) += pcie-mobiveil.o
+obj-$(CONFIG_PCIE_MOBIVEIL_HOST) += pcie-mobiveil-host.o
+obj-$(CONFIG_PCIE_MOBIVEIL_PLAT) += pcie-mobiveil-plat.o
diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
similarity index 55%
rename from drivers/pci/controller/pcie-mobiveil.c
rename to drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
index 8d6a1e98f655..383b2f3947a5 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
@@ -4,9 +4,9 @@
  *
  * Copyright (c) 2018 Mobiveil Inc.
  * Author: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
+ * Refactor: Zhiqiang Hou <Zhiqiang.Hou@nxp.com>
  */
 
-#include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
@@ -23,275 +23,21 @@
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 
-#include "../pci.h"
-
-/* register offsets and bit positions */
-
-/*
- * translation tables are grouped into windows, each window registers are
- * grouped into blocks of 4 or 16 registers each
- */
-#define PAB_REG_BLOCK_SIZE		16
-#define PAB_EXT_REG_BLOCK_SIZE		4
-
-#define PAB_REG_ADDR(offset, win)	\
-	(offset + (win * PAB_REG_BLOCK_SIZE))
-#define PAB_EXT_REG_ADDR(offset, win)	\
-	(offset + (win * PAB_EXT_REG_BLOCK_SIZE))
-
-#define LTSSM_STATUS			0x0404
-#define  LTSSM_STATUS_L0_MASK		0x3f
-#define  LTSSM_STATUS_L0		0x2d
-
-#define PAB_CTRL			0x0808
-#define  AMBA_PIO_ENABLE_SHIFT		0
-#define  PEX_PIO_ENABLE_SHIFT		1
-#define  PAGE_SEL_SHIFT			13
-#define  PAGE_SEL_MASK			0x3f
-#define  PAGE_LO_MASK			0x3ff
-#define  PAGE_SEL_OFFSET_SHIFT		10
-
-#define PAB_AXI_PIO_CTRL		0x0840
-#define  APIO_EN_MASK			0xf
-
-#define PAB_PEX_PIO_CTRL		0x08c0
-#define  PIO_ENABLE_SHIFT		0
-
-#define PAB_INTP_AMBA_MISC_ENB		0x0b0c
-#define PAB_INTP_AMBA_MISC_STAT		0x0b1c
-#define  PAB_INTP_INTX_MASK		0x01e0
-#define  PAB_INTP_MSI_MASK		0x8
-
-#define PAB_AXI_AMAP_CTRL(win)		PAB_REG_ADDR(0x0ba0, win)
-#define  WIN_ENABLE_SHIFT		0
-#define  WIN_TYPE_SHIFT			1
-#define  WIN_TYPE_MASK			0x3
-#define  WIN_SIZE_SHIFT			10
-#define  WIN_SIZE_MASK			0x3fffff
-
-#define PAB_EXT_AXI_AMAP_SIZE(win)	PAB_EXT_REG_ADDR(0xbaf0, win)
-
-#define PAB_EXT_AXI_AMAP_AXI_WIN(win)	PAB_EXT_REG_ADDR(0x80a0, win)
-#define PAB_AXI_AMAP_AXI_WIN(win)	PAB_REG_ADDR(0x0ba4, win)
-#define  AXI_WINDOW_ALIGN_MASK		3
-
-#define PAB_AXI_AMAP_PEX_WIN_L(win)	PAB_REG_ADDR(0x0ba8, win)
-#define  PAB_BUS_SHIFT			24
-#define  PAB_DEVICE_SHIFT		19
-#define  PAB_FUNCTION_SHIFT		16
-
-#define PAB_AXI_AMAP_PEX_WIN_H(win)	PAB_REG_ADDR(0x0bac, win)
-#define PAB_INTP_AXI_PIO_CLASS		0x474
-
-#define PAB_PEX_AMAP_CTRL(win)		PAB_REG_ADDR(0x4ba0, win)
-#define  AMAP_CTRL_EN_SHIFT		0
-#define  AMAP_CTRL_TYPE_SHIFT		1
-#define  AMAP_CTRL_TYPE_MASK		3
-
-#define PAB_EXT_PEX_AMAP_SIZEN(win)	PAB_EXT_REG_ADDR(0xbef0, win)
-#define PAB_EXT_PEX_AMAP_AXI_WIN(win)	PAB_EXT_REG_ADDR(0xb4a0, win)
-#define PAB_PEX_AMAP_AXI_WIN(win)	PAB_REG_ADDR(0x4ba4, win)
-#define PAB_PEX_AMAP_PEX_WIN_L(win)	PAB_REG_ADDR(0x4ba8, win)
-#define PAB_PEX_AMAP_PEX_WIN_H(win)	PAB_REG_ADDR(0x4bac, win)
-
-/* starting offset of INTX bits in status register */
-#define PAB_INTX_START			5
-
-/* supported number of MSI interrupts */
-#define PCI_NUM_MSI			16
-
-/* MSI registers */
-#define MSI_BASE_LO_OFFSET		0x04
-#define MSI_BASE_HI_OFFSET		0x08
-#define MSI_SIZE_OFFSET			0x0c
-#define MSI_ENABLE_OFFSET		0x14
-#define MSI_STATUS_OFFSET		0x18
-#define MSI_DATA_OFFSET			0x20
-#define MSI_ADDR_L_OFFSET		0x24
-#define MSI_ADDR_H_OFFSET		0x28
-
-/* outbound and inbound window definitions */
-#define WIN_NUM_0			0
-#define WIN_NUM_1			1
-#define CFG_WINDOW_TYPE			0
-#define IO_WINDOW_TYPE			1
-#define MEM_WINDOW_TYPE			2
-#define IB_WIN_SIZE			((u64)256 * 1024 * 1024 * 1024)
-#define MAX_PIO_WINDOWS			8
-
-/* Parameters for the waiting for link up routine */
-#define LINK_WAIT_MAX_RETRIES		10
-#define LINK_WAIT_MIN			90000
-#define LINK_WAIT_MAX			100000
-
-#define PAGED_ADDR_BNDRY		0xc00
-#define OFFSET_TO_PAGE_ADDR(off)	\
-	((off & PAGE_LO_MASK) | PAGED_ADDR_BNDRY)
-#define OFFSET_TO_PAGE_IDX(off)		\
-	((off >> PAGE_SEL_OFFSET_SHIFT) & PAGE_SEL_MASK)
-
-struct mobiveil_msi {			/* MSI information */
-	struct mutex lock;		/* protect bitmap variable */
-	struct irq_domain *msi_domain;
-	struct irq_domain *dev_domain;
-	phys_addr_t msi_pages_phys;
-	int num_of_vectors;
-	DECLARE_BITMAP(msi_irq_in_use, PCI_NUM_MSI);
-};
-
-struct mobiveil_pcie {
-	struct platform_device *pdev;
-	struct list_head resources;
-	void __iomem *config_axi_slave_base;	/* endpoint config base */
-	void __iomem *csr_axi_slave_base;	/* root port config base */
-	void __iomem *apb_csr_base;	/* MSI register base */
-	phys_addr_t pcie_reg_base;	/* Physical PCIe Controller Base */
-	struct irq_domain *intx_domain;
-	raw_spinlock_t intx_mask_lock;
-	int irq;
-	int apio_wins;
-	int ppio_wins;
-	int ob_wins_configured;		/* configured outbound windows */
-	int ib_wins_configured;		/* configured inbound windows */
-	struct resource *ob_io_res;
-	char root_bus_nr;
-	struct mobiveil_msi msi;
-};
-
-/*
- * mobiveil_pcie_sel_page - routine to access paged register
- *
- * Registers whose address greater than PAGED_ADDR_BNDRY (0xc00) are paged,
- * for this scheme to work extracted higher 6 bits of the offset will be
- * written to pg_sel field of PAB_CTRL register and rest of the lower 10
- * bits enabled with PAGED_ADDR_BNDRY are used as offset of the register.
- */
-static void mobiveil_pcie_sel_page(struct mobiveil_pcie *pcie, u8 pg_idx)
-{
-	u32 val;
-
-	val = readl(pcie->csr_axi_slave_base + PAB_CTRL);
-	val &= ~(PAGE_SEL_MASK << PAGE_SEL_SHIFT);
-	val |= (pg_idx & PAGE_SEL_MASK) << PAGE_SEL_SHIFT;
-
-	writel(val, pcie->csr_axi_slave_base + PAB_CTRL);
-}
-
-static void *mobiveil_pcie_comp_addr(struct mobiveil_pcie *pcie, u32 off)
-{
-	if (off < PAGED_ADDR_BNDRY) {
-		/* For directly accessed registers, clear the pg_sel field */
-		mobiveil_pcie_sel_page(pcie, 0);
-		return pcie->csr_axi_slave_base + off;
-	}
-
-	mobiveil_pcie_sel_page(pcie, OFFSET_TO_PAGE_IDX(off));
-	return pcie->csr_axi_slave_base + OFFSET_TO_PAGE_ADDR(off);
-}
-
-static int mobiveil_pcie_read(void __iomem *addr, int size, u32 *val)
-{
-	if ((uintptr_t)addr & (size - 1)) {
-		*val = 0;
-		return PCIBIOS_BAD_REGISTER_NUMBER;
-	}
-
-	switch (size) {
-	case 4:
-		*val = readl(addr);
-		break;
-	case 2:
-		*val = readw(addr);
-		break;
-	case 1:
-		*val = readb(addr);
-		break;
-	default:
-		*val = 0;
-		return PCIBIOS_BAD_REGISTER_NUMBER;
-	}
-
-	return PCIBIOS_SUCCESSFUL;
-}
-
-static int mobiveil_pcie_write(void __iomem *addr, int size, u32 val)
-{
-	if ((uintptr_t)addr & (size - 1))
-		return PCIBIOS_BAD_REGISTER_NUMBER;
-
-	switch (size) {
-	case 4:
-		writel(val, addr);
-		break;
-	case 2:
-		writew(val, addr);
-		break;
-	case 1:
-		writeb(val, addr);
-		break;
-	default:
-		return PCIBIOS_BAD_REGISTER_NUMBER;
-	}
-
-	return PCIBIOS_SUCCESSFUL;
-}
-
-static u32 csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size)
-{
-	void *addr;
-	u32 val;
-	int ret;
-
-	addr = mobiveil_pcie_comp_addr(pcie, off);
-
-	ret = mobiveil_pcie_read(addr, size, &val);
-	if (ret)
-		dev_err(&pcie->pdev->dev, "read CSR address failed\n");
-
-	return val;
-}
-
-static void csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off, size_t size)
-{
-	void *addr;
-	int ret;
-
-	addr = mobiveil_pcie_comp_addr(pcie, off);
-
-	ret = mobiveil_pcie_write(addr, size, val);
-	if (ret)
-		dev_err(&pcie->pdev->dev, "write CSR address failed\n");
-}
-
-static u32 csr_readl(struct mobiveil_pcie *pcie, u32 off)
-{
-	return csr_read(pcie, off, 0x4);
-}
-
-static void csr_writel(struct mobiveil_pcie *pcie, u32 val, u32 off)
-{
-	csr_write(pcie, val, off, 0x4);
-}
-
-static bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie)
-{
-	return (csr_readl(pcie, LTSSM_STATUS) &
-		LTSSM_STATUS_L0_MASK) == LTSSM_STATUS_L0;
-}
+#include "pcie-mobiveil.h"
 
 static bool mobiveil_pcie_valid_device(struct pci_bus *bus, unsigned int devfn)
 {
 	struct mobiveil_pcie *pcie = bus->sysdata;
 
 	/* Only one device down on each root port */
-	if ((bus->number == pcie->root_bus_nr) && (devfn > 0))
+	if ((bus->number == pcie->rp.root_bus_nr) && (devfn > 0))
 		return false;
 
 	/*
 	 * Do not read more than one device on the bus directly
 	 * attached to RC
 	 */
-	if ((bus->primary == pcie->root_bus_nr) && (devfn > 0))
+	if ((bus->primary == pcie->rp.root_bus_nr) && (devfn > 0))
 		return false;
 
 	return true;
@@ -311,7 +57,7 @@ static void __iomem *mobiveil_pcie_map_bus(struct pci_bus *bus,
 		return NULL;
 
 	/* RC config access */
-	if (bus->number == pcie->root_bus_nr)
+	if (bus->number == pcie->rp.root_bus_nr)
 		return pcie->csr_axi_slave_base + where;
 
 	/*
@@ -326,7 +72,7 @@ static void __iomem *mobiveil_pcie_map_bus(struct pci_bus *bus,
 
 	csr_writel(pcie, value, PAB_AXI_AMAP_PEX_WIN_L(WIN_NUM_0));
 
-	return pcie->config_axi_slave_base + where;
+	return pcie->rp.config_axi_slave_base + where;
 }
 
 static struct pci_ops mobiveil_pcie_ops = {
@@ -340,7 +86,7 @@ static void mobiveil_pcie_isr(struct irq_desc *desc)
 	struct irq_chip *chip = irq_desc_get_chip(desc);
 	struct mobiveil_pcie *pcie = irq_desc_get_handler_data(desc);
 	struct device *dev = &pcie->pdev->dev;
-	struct mobiveil_msi *msi = &pcie->msi;
+	struct mobiveil_msi *msi = &pcie->rp.msi;
 	u32 msi_data, msi_addr_lo, msi_addr_hi;
 	u32 intr_status, msi_status;
 	unsigned long shifted_status;
@@ -365,7 +111,7 @@ static void mobiveil_pcie_isr(struct irq_desc *desc)
 		shifted_status >>= PAB_INTX_START;
 		do {
 			for_each_set_bit(bit, &shifted_status, PCI_NUM_INTX) {
-				virq = irq_find_mapping(pcie->intx_domain,
+				virq = irq_find_mapping(pcie->rp.intx_domain,
 							bit + 1);
 				if (virq)
 					generic_handle_irq(virq);
@@ -428,10 +174,10 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie)
 	/* map config resource */
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 					   "config_axi_slave");
-	pcie->config_axi_slave_base = devm_pci_remap_cfg_resource(dev, res);
-	if (IS_ERR(pcie->config_axi_slave_base))
-		return PTR_ERR(pcie->config_axi_slave_base);
-	pcie->ob_io_res = res;
+	pcie->rp.config_axi_slave_base = devm_pci_remap_cfg_resource(dev, res);
+	if (IS_ERR(pcie->rp.config_axi_slave_base))
+		return PTR_ERR(pcie->rp.config_axi_slave_base);
+	pcie->rp.ob_io_res = res;
 
 	/* map csr resource */
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
@@ -441,12 +187,6 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie)
 		return PTR_ERR(pcie->csr_axi_slave_base);
 	pcie->pcie_reg_base = res->start;
 
-	/* map MSI config resource */
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "apb_csr");
-	pcie->apb_csr_base = devm_pci_remap_cfg_resource(dev, res);
-	if (IS_ERR(pcie->apb_csr_base))
-		return PTR_ERR(pcie->apb_csr_base);
-
 	/* read the number of windows requested */
 	if (of_property_read_u32(node, "apio-wins", &pcie->apio_wins))
 		pcie->apio_wins = MAX_PIO_WINDOWS;
@@ -454,118 +194,15 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie)
 	if (of_property_read_u32(node, "ppio-wins", &pcie->ppio_wins))
 		pcie->ppio_wins = MAX_PIO_WINDOWS;
 
-	pcie->irq = platform_get_irq(pdev, 0);
-	if (pcie->irq <= 0) {
-		dev_err(dev, "failed to map IRQ: %d\n", pcie->irq);
-		return -ENODEV;
-	}
-
 	return 0;
 }
 
-static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num,
-			       u64 cpu_addr, u64 pci_addr, u32 type, u64 size)
-{
-	u32 value;
-	u64 size64 = ~(size - 1);
-
-	if (win_num >= pcie->ppio_wins) {
-		dev_err(&pcie->pdev->dev,
-			"ERROR: max inbound windows reached !\n");
-		return;
-	}
-
-	value = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num));
-	value &= ~(AMAP_CTRL_TYPE_MASK << AMAP_CTRL_TYPE_SHIFT);
-	value |= (type << AMAP_CTRL_TYPE_SHIFT) | (1 << AMAP_CTRL_EN_SHIFT) |
-		 (lower_32_bits(size64) & WIN_SIZE_MASK << WIN_SIZE_SHIFT);
-	csr_writel(pcie, value, PAB_PEX_AMAP_CTRL(win_num));
-
-	csr_writel(pcie, upper_32_bits(size64),
-		   PAB_EXT_PEX_AMAP_SIZEN(win_num));
-
-	csr_writel(pcie, lower_32_bits(cpu_addr),
-		   PAB_PEX_AMAP_AXI_WIN(win_num));
-	csr_writel(pcie, upper_32_bits(cpu_addr),
-		   PAB_EXT_PEX_AMAP_AXI_WIN(win_num));
-
-	csr_writel(pcie, lower_32_bits(pci_addr),
-		   PAB_PEX_AMAP_PEX_WIN_L(win_num));
-	csr_writel(pcie, upper_32_bits(pci_addr),
-		   PAB_PEX_AMAP_PEX_WIN_H(win_num));
-
-	pcie->ib_wins_configured++;
-}
-
-/*
- * routine to program the outbound windows
- */
-static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num,
-			       u64 cpu_addr, u64 pci_addr, u32 type, u64 size)
-{
-
-	u32 value;
-	u64 size64 = ~(size - 1);
-
-	if (win_num  >= pcie->apio_wins) {
-		dev_err(&pcie->pdev->dev,
-			"ERROR: max outbound windows reached !\n");
-		return;
-	}
-
-	/*
-	 * program Enable Bit to 1, Type Bit to (00) base 2, AXI Window Size Bit
-	 * to 4 KB in PAB_AXI_AMAP_CTRL register
-	 */
-	value = csr_readl(pcie, PAB_AXI_AMAP_CTRL(win_num));
-	value &= ~(WIN_TYPE_MASK << WIN_TYPE_SHIFT |
-		 WIN_SIZE_MASK << WIN_SIZE_SHIFT);
-	value |= 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT |
-		 (lower_32_bits(size64) & WIN_SIZE_MASK << WIN_SIZE_SHIFT);
-	csr_writel(pcie, value, PAB_AXI_AMAP_CTRL(win_num));
-
-	csr_writel(pcie, upper_32_bits(size64), PAB_EXT_AXI_AMAP_SIZE(win_num));
-
-	/*
-	 * program AXI window base with appropriate value in
-	 * PAB_AXI_AMAP_AXI_WIN0 register
-	 */
-	csr_writel(pcie, lower_32_bits(cpu_addr) & (~AXI_WINDOW_ALIGN_MASK),
-		   PAB_AXI_AMAP_AXI_WIN(win_num));
-	csr_writel(pcie, upper_32_bits(cpu_addr),
-		   PAB_EXT_AXI_AMAP_AXI_WIN(win_num));
-
-	csr_writel(pcie, lower_32_bits(pci_addr),
-		   PAB_AXI_AMAP_PEX_WIN_L(win_num));
-	csr_writel(pcie, upper_32_bits(pci_addr),
-		   PAB_AXI_AMAP_PEX_WIN_H(win_num));
-
-	pcie->ob_wins_configured++;
-}
-
-static int mobiveil_bringup_link(struct mobiveil_pcie *pcie)
-{
-	int retries;
-
-	/* check if the link is up or not */
-	for (retries = 0; retries < LINK_WAIT_MAX_RETRIES; retries++) {
-		if (mobiveil_pcie_link_up(pcie))
-			return 0;
-
-		usleep_range(LINK_WAIT_MIN, LINK_WAIT_MAX);
-	}
-
-	dev_err(&pcie->pdev->dev, "link never came up\n");
-
-	return -ETIMEDOUT;
-}
-
 static void mobiveil_pcie_enable_msi(struct mobiveil_pcie *pcie)
 {
 	phys_addr_t msg_addr = pcie->pcie_reg_base;
-	struct mobiveil_msi *msi = &pcie->msi;
+	struct mobiveil_msi *msi = &pcie->rp.msi;
 
-	pcie->msi.num_of_vectors = PCI_NUM_MSI;
+	msi->num_of_vectors = PCI_NUM_MSI;
 	msi->msi_pages_phys = (phys_addr_t)msg_addr;
 
 	writel_relaxed(lower_32_bits(msg_addr),
@@ -627,20 +264,24 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 	 */
 
 	/* config outbound translation window */
-	program_ob_windows(pcie, WIN_NUM_0, pcie->ob_io_res->start, 0,
-			   CFG_WINDOW_TYPE, resource_size(pcie->ob_io_res));
+	program_ob_windows(pcie, WIN_NUM_0, pcie->rp.ob_io_res->start, 0,
+			   CFG_WINDOW_TYPE, resource_size(pcie->rp.ob_io_res));
 
 	/* memory inbound translation window */
 	program_ib_windows(pcie, WIN_NUM_0, 0, 0, MEM_WINDOW_TYPE, IB_WIN_SIZE);
 
 	/* Get the I/O and memory ranges from DT */
 	resource_list_for_each_entry(win, &pcie->resources) {
-		if (resource_type(win->res) == IORESOURCE_MEM)
+		if (resource_type(win->res) == IORESOURCE_MEM) {
 			type = MEM_WINDOW_TYPE;
-		else if (resource_type(win->res) == IORESOURCE_IO)
+		} else if (resource_type(win->res) == IORESOURCE_IO) {
 			type = IO_WINDOW_TYPE;
-		else
+		} else if (resource_type(win->res) == IORESOURCE_BUS) {
+			pcie->rp.root_bus_nr = win->res->start;
 			continue;
+		} else {
+			continue;
+		}
 
 		/* configure outbound translation window */
 		program_ob_windows(pcie, pcie->ob_wins_configured,
@@ -655,9 +296,6 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 	value |= (PCI_CLASS_BRIDGE_PCI << 16);
 	csr_writel(pcie, value, PAB_INTP_AXI_PIO_CLASS);
 
-	/* setup MSI hardware registers */
-	mobiveil_pcie_enable_msi(pcie);
-
 	return 0;
 }
 
@@ -670,11 +308,11 @@ static void mobiveil_mask_intx_irq(struct irq_data *data)
 
 	pcie = irq_desc_get_chip_data(desc);
 	mask = 1 << ((data->hwirq + PAB_INTX_START) - 1);
-	raw_spin_lock_irqsave(&pcie->intx_mask_lock, flags);
+	raw_spin_lock_irqsave(&pcie->rp.intx_mask_lock, flags);
 	shifted_val = csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB);
 	shifted_val &= ~mask;
 	csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB);
-	raw_spin_unlock_irqrestore(&pcie->intx_mask_lock, flags);
+	raw_spin_unlock_irqrestore(&pcie->rp.intx_mask_lock, flags);
 }
 
 static void mobiveil_unmask_intx_irq(struct irq_data *data)
@@ -686,11 +324,11 @@ static void mobiveil_unmask_intx_irq(struct irq_data *data)
 
 	pcie = irq_desc_get_chip_data(desc);
 	mask = 1 << ((data->hwirq + PAB_INTX_START) - 1);
-	raw_spin_lock_irqsave(&pcie->intx_mask_lock, flags);
+	raw_spin_lock_irqsave(&pcie->rp.intx_mask_lock, flags);
 	shifted_val = csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB);
 	shifted_val |= mask;
 	csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB);
-	raw_spin_unlock_irqrestore(&pcie->intx_mask_lock, flags);
+	raw_spin_unlock_irqrestore(&pcie->rp.intx_mask_lock, flags);
 }
 
 static struct irq_chip intx_irq_chip = {
@@ -758,7 +396,7 @@ static int mobiveil_irq_msi_domain_alloc(struct irq_domain *domain,
 					 unsigned int nr_irqs, void *args)
 {
 	struct mobiveil_pcie *pcie = domain->host_data;
-	struct mobiveil_msi *msi = &pcie->msi;
+	struct mobiveil_msi *msi = &pcie->rp.msi;
 	unsigned long bit;
 
 	WARN_ON(nr_irqs != 1);
@@ -785,7 +423,7 @@ static void mobiveil_irq_msi_domain_free(struct irq_domain *domain,
 {
 	struct irq_data *d = irq_domain_get_irq_data(domain, virq);
 	struct mobiveil_pcie *pcie = irq_data_get_irq_chip_data(d);
-	struct mobiveil_msi *msi = &pcie->msi;
+	struct mobiveil_msi *msi = &pcie->rp.msi;
 
 	mutex_lock(&msi->lock);
 
@@ -806,9 +444,9 @@ static int mobiveil_allocate_msi_domains(struct mobiveil_pcie *pcie)
 {
 	struct device *dev = &pcie->pdev->dev;
 	struct fwnode_handle *fwnode = of_node_to_fwnode(dev->of_node);
-	struct mobiveil_msi *msi = &pcie->msi;
+	struct mobiveil_msi *msi = &pcie->rp.msi;
 
-	mutex_init(&pcie->msi.lock);
+	mutex_init(&msi->lock);
 	msi->dev_domain = irq_domain_add_linear(NULL, msi->num_of_vectors,
 						&msi_domain_ops, pcie);
 	if (!msi->dev_domain) {
@@ -835,15 +473,15 @@ static int mobiveil_pcie_init_irq_domain(struct mobiveil_pcie *pcie)
 	int ret;
 
 	/* setup INTx */
-	pcie->intx_domain = irq_domain_add_linear(node, PCI_NUM_INTX,
-						  &intx_domain_ops, pcie);
+	pcie->rp.intx_domain = irq_domain_add_linear(node, PCI_NUM_INTX,
+						     &intx_domain_ops, pcie);
 
-	if (!pcie->intx_domain) {
+	if (!pcie->rp.intx_domain) {
 		dev_err(dev, "Failed to get a INTx IRQ domain\n");
 		return -ENOMEM;
 	}
 
-	raw_spin_lock_init(&pcie->intx_mask_lock);
+	raw_spin_lock_init(&pcie->rp.intx_mask_lock);
 
 	/* setup MSI */
 	ret = mobiveil_allocate_msi_domains(pcie);
@@ -853,24 +491,54 @@ static int mobiveil_pcie_init_irq_domain(struct mobiveil_pcie *pcie)
 	return 0;
 }
 
-static int mobiveil_pcie_probe(struct platform_device *pdev)
+static int mobiveil_pcie_interrupt_init(struct mobiveil_pcie *pcie)
+{
+	struct device *dev = &pcie->pdev->dev;
+	struct resource *res;
+	int ret;
+
+	if (pcie->rp.ops->interrupt_init)
+		return pcie->rp.ops->interrupt_init(pcie);
+
+	/* map MSI config resource */
+	res = platform_get_resource_byname(pcie->pdev, IORESOURCE_MEM,
+					   "apb_csr");
+	pcie->apb_csr_base = devm_pci_remap_cfg_resource(dev, res);
+	if (IS_ERR(pcie->apb_csr_base))
+		return PTR_ERR(pcie->apb_csr_base);
+
+	/* setup MSI hardware registers */
+	mobiveil_pcie_enable_msi(pcie);
+
+	pcie->rp.irq = platform_get_irq(pcie->pdev, 0);
+	if (pcie->rp.irq <= 0) {
+		dev_err(dev, "failed to map IRQ: %d\n", pcie->rp.irq);
+		return -ENODEV;
+	}
+
+	/* initialize the IRQ domains */
+	ret = mobiveil_pcie_init_irq_domain(pcie);
+	if (ret) {
+		dev_err(dev, "Failed creating IRQ Domain\n");
+		return ret;
+	}
+
+	irq_set_chained_handler_and_data(pcie->rp.irq,
+					 mobiveil_pcie_isr, pcie);
+
+	return 0;
+}
+
+int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie)
 {
-	struct mobiveil_pcie *pcie;
 	struct pci_bus *bus;
 	struct pci_bus *child;
 	struct pci_host_bridge *bridge;
-	struct device *dev = &pdev->dev;
+	struct device *dev = &pcie->pdev->dev;
 	resource_size_t iobase;
 	int ret;
 
-	/* allocate the PCIe port */
-	bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
-	if (!bridge)
-		return -ENOMEM;
-
-	pcie = pci_host_bridge_priv(bridge);
-
-	pcie->pdev = pdev;
+	INIT_LIST_HEAD(&pcie->resources);
 
 	ret = mobiveil_pcie_parse_dt(pcie);
 	if (ret) {
@@ -878,7 +546,10 @@ static int mobiveil_pcie_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	INIT_LIST_HEAD(&pcie->resources);
+	/* allocate the PCIe port */
+	bridge = devm_pci_alloc_host_bridge(dev, 0);
+	if (!bridge)
+		return -ENOMEM;
 
 	/* parse the host bridge base addresses from the device tree file */
 	ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff,
@@ -898,15 +569,12 @@ static int mobiveil_pcie_probe(struct platform_device *pdev)
 		goto error;
 	}
 
-	/* initialize the IRQ domains */
-	ret = mobiveil_pcie_init_irq_domain(pcie);
+	ret = mobiveil_pcie_interrupt_init(pcie);
 	if (ret) {
-		dev_err(dev, "Failed creating IRQ Domain\n");
+		dev_err(dev, "Interrupt init failed\n");
 		goto error;
 	}
 
-	irq_set_chained_handler_and_data(pcie->irq, mobiveil_pcie_isr, pcie);
-
 	ret = devm_request_pci_bus_resources(dev, &pcie->resources);
 	if (ret)
 		goto error;
@@ -915,7 +583,7 @@ static int mobiveil_pcie_probe(struct platform_device *pdev)
 	list_splice_init(&pcie->resources, &bridge->windows);
 	bridge->dev.parent = dev;
 	bridge->sysdata = pcie;
-	bridge->busnr = pcie->root_bus_nr;
+	bridge->busnr = pcie->rp.root_bus_nr;
 	bridge->ops = &mobiveil_pcie_ops;
 	bridge->map_irq = of_irq_parse_and_map_pci;
 	bridge->swizzle_irq = pci_common_swizzle;
@@ -943,25 +611,3 @@ static int mobiveil_pcie_probe(struct platform_device *pdev)
 	pci_free_resource_list(&pcie->resources);
 	return ret;
 }
-
-static const struct of_device_id mobiveil_pcie_of_match[] = {
-	{.compatible = "mbvl,gpex40-pcie",},
-	{},
-};
-
-MODULE_DEVICE_TABLE(of, mobiveil_pcie_of_match);
-
-static struct platform_driver mobiveil_pcie_driver = {
-	.probe = mobiveil_pcie_probe,
-	.driver = {
-		.name = "mobiveil-pcie",
-		.of_match_table = mobiveil_pcie_of_match,
-		.suppress_bind_attrs = true,
-	},
-};
-
-builtin_platform_driver(mobiveil_pcie_driver);
-
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("Mobiveil PCIe host controller driver");
-MODULE_AUTHOR("Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>");
diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-plat.c b/drivers/pci/controller/mobiveil/pcie-mobiveil-plat.c
new file mode 100644
index 000000000000..216c62f35568
--- /dev/null
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-plat.c
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PCIe host controller driver for Mobiveil PCIe Host controller
+ *
+ * Copyright (c) 2018 Mobiveil Inc.
+ * Author: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
+ * Refactor: Zhiqiang Hou <Zhiqiang.Hou@nxp.com>
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_pci.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include "pcie-mobiveil.h"
+
+static int mobiveil_pcie_probe(struct platform_device *pdev)
+{
+	struct mobiveil_pcie *pcie;
+	struct device *dev = &pdev->dev;
+
+	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
+	if (!pcie)
+		return -ENOMEM;
+
+	pcie->pdev = pdev;
+
+	return mobiveil_pcie_host_probe(pcie);
+}
+
+static const struct of_device_id mobiveil_pcie_of_match[] = {
+	{.compatible = "mbvl,gpex40-pcie",},
+	{},
+};
+
+MODULE_DEVICE_TABLE(of, mobiveil_pcie_of_match);
+
+static struct platform_driver mobiveil_pcie_driver = {
+	.probe = mobiveil_pcie_probe,
+	.driver = {
+		.name = "mobiveil-pcie",
+		.of_match_table = mobiveil_pcie_of_match,
+		.suppress_bind_attrs = true,
+	},
+};
+
+builtin_platform_driver(mobiveil_pcie_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Mobiveil PCIe host controller driver");
+MODULE_AUTHOR("Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>");
diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.c b/drivers/pci/controller/mobiveil/pcie-mobiveil.c
new file mode 100644
index 000000000000..a25ebdd23592
--- /dev/null
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.c
@@ -0,0 +1,227 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PCIe host controller driver for Mobiveil PCIe Host controller
+ *
+ * Copyright (c) 2018 Mobiveil Inc.
+ * Author: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
+ * Refactor: Zhiqiang Hou <Zhiqiang.Hou@nxp.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+
+#include "pcie-mobiveil.h"
+
+/*
+ * mobiveil_pcie_sel_page - routine to access paged register
+ *
+ * Registers whose address greater than PAGED_ADDR_BNDRY (0xc00) are paged,
+ * for this scheme to work extracted higher 6 bits of the offset will be
+ * written to pg_sel field of PAB_CTRL register and rest of the lower 10
+ * bits enabled with PAGED_ADDR_BNDRY are used as offset of the register.
+ */
+static void mobiveil_pcie_sel_page(struct mobiveil_pcie *pcie, u8 pg_idx)
+{
+	u32 val;
+
+	val = readl(pcie->csr_axi_slave_base + PAB_CTRL);
+	val &= ~(PAGE_SEL_MASK << PAGE_SEL_SHIFT);
+	val |= (pg_idx & PAGE_SEL_MASK) << PAGE_SEL_SHIFT;
+
+	writel(val, pcie->csr_axi_slave_base + PAB_CTRL);
+}
+
+static void *mobiveil_pcie_comp_addr(struct mobiveil_pcie *pcie, u32 off)
+{
+	if (off < PAGED_ADDR_BNDRY) {
+		/* For directly accessed registers, clear the pg_sel field */
+		mobiveil_pcie_sel_page(pcie, 0);
+		return pcie->csr_axi_slave_base + off;
+	}
+
+	mobiveil_pcie_sel_page(pcie, OFFSET_TO_PAGE_IDX(off));
+	return pcie->csr_axi_slave_base + OFFSET_TO_PAGE_ADDR(off);
+}
+
+static int mobiveil_pcie_read(void __iomem *addr, int size, u32 *val)
+{
+	if ((uintptr_t)addr & (size - 1)) {
+		*val = 0;
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+	}
+
+	switch (size) {
+	case 4:
+		*val = readl(addr);
+		break;
+	case 2:
+		*val = readw(addr);
+		break;
+	case 1:
+		*val = readb(addr);
+		break;
+	default:
+		*val = 0;
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+	}
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int mobiveil_pcie_write(void __iomem *addr, int size, u32 val)
+{
+	if ((uintptr_t)addr & (size - 1))
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+
+	switch (size) {
+	case 4:
+		writel(val, addr);
+		break;
+	case 2:
+		writew(val, addr);
+		break;
+	case 1:
+		writeb(val, addr);
+		break;
+	default:
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+	}
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+u32 csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size)
+{
+	void *addr;
+	u32 val;
+	int ret;
+
+	addr = mobiveil_pcie_comp_addr(pcie, off);
+
+	ret = mobiveil_pcie_read(addr, size, &val);
+	if (ret)
+		dev_err(&pcie->pdev->dev, "read CSR address failed\n");
+
+	return val;
+}
+
+void csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off, size_t size)
+{
+	void *addr;
+	int ret;
+
+	addr = mobiveil_pcie_comp_addr(pcie, off);
+
+	ret = mobiveil_pcie_write(addr, size, val);
+	if (ret)
+		dev_err(&pcie->pdev->dev, "write CSR address failed\n");
+}
+
+bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie)
+{
+	if (pcie->ops->link_up)
+		return pcie->ops->link_up(pcie);
+
+	return (csr_readl(pcie, LTSSM_STATUS) &
+		LTSSM_STATUS_L0_MASK) == LTSSM_STATUS_L0;
+}
+
+void program_ib_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
+			u64 pci_addr, u32 type, u64 size)
+{
+	u32 value;
+	u64 size64 = ~(size - 1);
+
+	if (win_num >= pcie->ppio_wins) {
+		dev_err(&pcie->pdev->dev,
+			"ERROR: max inbound windows reached !\n");
+		return;
+	}
+
+	value = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num));
+	value &= ~(AMAP_CTRL_TYPE_MASK << AMAP_CTRL_TYPE_SHIFT);
+	value |= (type << AMAP_CTRL_TYPE_SHIFT) | (1 << AMAP_CTRL_EN_SHIFT) |
+		 (lower_32_bits(size64) & WIN_SIZE_MASK << WIN_SIZE_SHIFT);
+	csr_writel(pcie, value, PAB_PEX_AMAP_CTRL(win_num));
+
+	csr_writel(pcie, upper_32_bits(size64),
+		   PAB_EXT_PEX_AMAP_SIZEN(win_num));
+
+	csr_writel(pcie, lower_32_bits(cpu_addr),
+		   PAB_PEX_AMAP_AXI_WIN(win_num));
+	csr_writel(pcie, upper_32_bits(cpu_addr),
+		   PAB_EXT_PEX_AMAP_AXI_WIN(win_num));
+
+	csr_writel(pcie, lower_32_bits(pci_addr),
+		   PAB_PEX_AMAP_PEX_WIN_L(win_num));
+	csr_writel(pcie, upper_32_bits(pci_addr),
+		   PAB_PEX_AMAP_PEX_WIN_H(win_num));
+
+	pcie->ib_wins_configured++;
+}
+
+/*
+ * routine to program the outbound windows
+ */
+void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
+			u64 pci_addr, u32 type, u64 size)
+{
+
+	u32 value;
+	u64 size64 = ~(size - 1);
+
+	if (win_num  >= pcie->apio_wins) {
+		dev_err(&pcie->pdev->dev,
+			"ERROR: max outbound windows reached !\n");
+		return;
+	}
+
+	/*
+	 * program Enable Bit to 1, Type Bit to (00) base 2, AXI Window Size Bit
+	 * to 4 KB in PAB_AXI_AMAP_CTRL register
+	 */
+	value = csr_readl(pcie, PAB_AXI_AMAP_CTRL(win_num));
+	value &= ~(WIN_TYPE_MASK << WIN_TYPE_SHIFT |
+		 WIN_SIZE_MASK << WIN_SIZE_SHIFT);
+	value |= 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT |
+		 (lower_32_bits(size64) & WIN_SIZE_MASK << WIN_SIZE_SHIFT);
+	csr_writel(pcie, value, PAB_AXI_AMAP_CTRL(win_num));
+
+	csr_writel(pcie, upper_32_bits(size64), PAB_EXT_AXI_AMAP_SIZE(win_num));
+
+	/*
+	 * program AXI window base with appropriate value in
+	 * PAB_AXI_AMAP_AXI_WIN0 register
+	 */
+	csr_writel(pcie, lower_32_bits(cpu_addr) & (~AXI_WINDOW_ALIGN_MASK),
+		   PAB_AXI_AMAP_AXI_WIN(win_num));
+	csr_writel(pcie, upper_32_bits(cpu_addr),
+		   PAB_EXT_AXI_AMAP_AXI_WIN(win_num));
+
+	csr_writel(pcie, lower_32_bits(pci_addr),
+		   PAB_AXI_AMAP_PEX_WIN_L(win_num));
+	csr_writel(pcie, upper_32_bits(pci_addr),
+		   PAB_AXI_AMAP_PEX_WIN_H(win_num));
+
+	pcie->ob_wins_configured++;
+}
+
+int mobiveil_bringup_link(struct mobiveil_pcie *pcie)
+{
+	int retries;
+
+	/* check if the link is up or not */
+	for (retries = 0; retries < LINK_WAIT_MAX_RETRIES; retries++) {
+		if (mobiveil_pcie_link_up(pcie))
+			return 0;
+
+		usleep_range(LINK_WAIT_MIN, LINK_WAIT_MAX);
+	}
+
+	dev_err(&pcie->pdev->dev, "link never came up\n");
+
+	return -ETIMEDOUT;
+}
diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.h b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
new file mode 100644
index 000000000000..eb4cb61291a8
--- /dev/null
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
@@ -0,0 +1,187 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * PCIe host controller driver for Mobiveil PCIe Host controller
+ *
+ * Copyright (c) 2018 Mobiveil Inc.
+ * Author: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
+ * Refactor: Zhiqiang Hou <Zhiqiang.Hou@nxp.com>
+ */
+
+#ifndef _PCIE_MOBIVEIL_H
+#define _PCIE_MOBIVEIL_H
+
+#include <linux/pci.h>
+#include <linux/irq.h>
+#include <linux/msi.h>
+#include "../../pci.h"
+
+/* register offsets and bit positions */
+
+/*
+ * translation tables are grouped into windows, each window registers are
+ * grouped into blocks of 4 or 16 registers each
+ */
+#define PAB_REG_BLOCK_SIZE		16
+#define PAB_EXT_REG_BLOCK_SIZE		4
+
+#define PAB_REG_ADDR(offset, win)	\
+	(offset + (win * PAB_REG_BLOCK_SIZE))
+#define PAB_EXT_REG_ADDR(offset, win)	\
+	(offset + (win * PAB_EXT_REG_BLOCK_SIZE))
+
+#define LTSSM_STATUS			0x0404
+#define  LTSSM_STATUS_L0_MASK		0x3f
+#define  LTSSM_STATUS_L0		0x2d
+
+#define PAB_CTRL			0x0808
+#define  AMBA_PIO_ENABLE_SHIFT		0
+#define  PEX_PIO_ENABLE_SHIFT		1
+#define  PAGE_SEL_SHIFT			13
+#define  PAGE_SEL_MASK			0x3f
+#define  PAGE_LO_MASK			0x3ff
+#define  PAGE_SEL_OFFSET_SHIFT		10
+
+#define PAB_AXI_PIO_CTRL		0x0840
+#define  APIO_EN_MASK			0xf
+
+#define PAB_PEX_PIO_CTRL		0x08c0
+#define  PIO_ENABLE_SHIFT		0
+
+#define PAB_INTP_AMBA_MISC_ENB		0x0b0c
+#define PAB_INTP_AMBA_MISC_STAT		0x0b1c
+#define  PAB_INTP_INTX_MASK		0x01e0
+#define  PAB_INTP_MSI_MASK		0x8
+
+#define PAB_AXI_AMAP_CTRL(win)		PAB_REG_ADDR(0x0ba0, win)
+#define  WIN_ENABLE_SHIFT		0
+#define  WIN_TYPE_SHIFT			1
+#define  WIN_TYPE_MASK			0x3
+#define  WIN_SIZE_SHIFT			10
+#define  WIN_SIZE_MASK			0x3fffff
+
+#define PAB_EXT_AXI_AMAP_SIZE(win)	PAB_EXT_REG_ADDR(0xbaf0, win)
+
+#define PAB_EXT_AXI_AMAP_AXI_WIN(win)	PAB_EXT_REG_ADDR(0x80a0, win)
+#define PAB_AXI_AMAP_AXI_WIN(win)	PAB_REG_ADDR(0x0ba4, win)
+#define  AXI_WINDOW_ALIGN_MASK		3
+
+#define PAB_AXI_AMAP_PEX_WIN_L(win)	PAB_REG_ADDR(0x0ba8, win)
+#define  PAB_BUS_SHIFT			24
+#define  PAB_DEVICE_SHIFT		19
+#define  PAB_FUNCTION_SHIFT		16
+
+#define PAB_AXI_AMAP_PEX_WIN_H(win)	PAB_REG_ADDR(0x0bac, win)
+#define PAB_INTP_AXI_PIO_CLASS		0x474
+
+#define PAB_PEX_AMAP_CTRL(win)		PAB_REG_ADDR(0x4ba0, win)
+#define  AMAP_CTRL_EN_SHIFT		0
+#define  AMAP_CTRL_TYPE_SHIFT		1
+#define  AMAP_CTRL_TYPE_MASK		3
+
+#define PAB_EXT_PEX_AMAP_SIZEN(win)	PAB_EXT_REG_ADDR(0xbef0, win)
+#define PAB_EXT_PEX_AMAP_AXI_WIN(win)	PAB_EXT_REG_ADDR(0xb4a0, win)
+#define PAB_PEX_AMAP_AXI_WIN(win)	PAB_REG_ADDR(0x4ba4, win)
+#define PAB_PEX_AMAP_PEX_WIN_L(win)	PAB_REG_ADDR(0x4ba8, win)
+#define PAB_PEX_AMAP_PEX_WIN_H(win)	PAB_REG_ADDR(0x4bac, win)
+
+/* starting offset of INTX bits in status register */
+#define PAB_INTX_START			5
+
+/* supported number of MSI interrupts */
+#define PCI_NUM_MSI			16
+
+/* MSI registers */
+#define MSI_BASE_LO_OFFSET		0x04
+#define MSI_BASE_HI_OFFSET		0x08
+#define MSI_SIZE_OFFSET			0x0c
+#define MSI_ENABLE_OFFSET		0x14
+#define MSI_STATUS_OFFSET		0x18
+#define MSI_DATA_OFFSET			0x20
+#define MSI_ADDR_L_OFFSET		0x24
+#define MSI_ADDR_H_OFFSET		0x28
+
+/* outbound and inbound window definitions */
+#define WIN_NUM_0			0
+#define WIN_NUM_1			1
+#define CFG_WINDOW_TYPE			0
+#define IO_WINDOW_TYPE			1
+#define MEM_WINDOW_TYPE			2
+#define IB_WIN_SIZE			((u64)256 * 1024 * 1024 * 1024)
+#define MAX_PIO_WINDOWS			8
+
+/* Parameters for the waiting for link up routine */
+#define LINK_WAIT_MAX_RETRIES		10
+#define LINK_WAIT_MIN			90000
+#define LINK_WAIT_MAX			100000
+
+#define PAGED_ADDR_BNDRY		0xc00
+#define OFFSET_TO_PAGE_ADDR(off)	\
+	((off & PAGE_LO_MASK) | PAGED_ADDR_BNDRY)
+#define OFFSET_TO_PAGE_IDX(off)		\
+	((off >> PAGE_SEL_OFFSET_SHIFT) & PAGE_SEL_MASK)
+
+struct mobiveil_pcie;
+
+struct mobiveil_msi {			/* MSI information */
+	struct mutex lock;		/* protect bitmap variable */
+	struct irq_domain *msi_domain;
+	struct irq_domain *dev_domain;
+	phys_addr_t msi_pages_phys;
+	int num_of_vectors;
+	DECLARE_BITMAP(msi_irq_in_use, PCI_NUM_MSI);
+};
+
+struct mobiveil_rp_ops {
+	int (*interrupt_init)(struct mobiveil_pcie *pcie);
+};
+
+struct root_port {
+	u8 root_bus_nr;
+	void __iomem *config_axi_slave_base;	/* endpoint config base */
+	struct resource *ob_io_res;
+	struct mobiveil_rp_ops *ops;
+	int irq;
+	raw_spinlock_t intx_mask_lock;
+	struct irq_domain *intx_domain;
+	struct mobiveil_msi msi;
+};
+
+struct mobiveil_pab_ops {
+	int (*link_up)(struct mobiveil_pcie *pcie);
+};
+
+struct mobiveil_pcie {
+	struct platform_device *pdev;
+	struct list_head resources;
+	void __iomem *csr_axi_slave_base;	/* PAB registers base */
+	phys_addr_t pcie_reg_base;	/* Physical PCIe Controller Base */
+	void __iomem *apb_csr_base;	/* MSI register base */
+	u32 apio_wins;
+	u32 ppio_wins;
+	u32 ob_wins_configured;		/* configured outbound windows */
+	u32 ib_wins_configured;		/* configured inbound windows */
+	const struct mobiveil_pab_ops *ops;
+	struct root_port rp;
+};
+
+int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie);
+bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie);
+int mobiveil_bringup_link(struct mobiveil_pcie *pcie);
+void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
+			u64 pci_addr, u32 type, u64 size);
+void program_ib_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
+			u64 pci_addr, u32 type, u64 size);
+u32 csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size);
+void csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off, size_t size);
+
+static inline u32 csr_readl(struct mobiveil_pcie *pcie, u32 off)
+{
+	return csr_read(pcie, off, 0x4);
+}
+
+static inline void csr_writel(struct mobiveil_pcie *pcie, u32 val, u32 off)
+{
+	csr_write(pcie, val, off, 0x4);
+}
+
+#endif /* _PCIE_MOBIVEIL_H */
-- 
2.17.1

[PATCH 17/23] PCI: mobiveil: continue to initialize the host upon no PCIe link

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

Sometimes there is not a PCIe Endpoint in the PCIe slot, so do
not exit when the PCIe link is not up. And degrade the print
level of link up info.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 drivers/pci/controller/mobiveil/pcie-mobiveil-host.c | 1 -
 drivers/pci/controller/mobiveil/pcie-mobiveil.c      | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
index 383b2f3947a5..4419179f64bc 100644
--- a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
@@ -591,7 +591,6 @@ int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie)
 	ret = mobiveil_bringup_link(pcie);
 	if (ret) {
 		dev_info(dev, "link bring-up failed\n");
-		goto error;
 	}
 
 	/* setup the kernel resources for the newly added PCIe root bus */
diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.c b/drivers/pci/controller/mobiveil/pcie-mobiveil.c
index a25ebdd23592..71389ebbf229 100644
--- a/drivers/pci/controller/mobiveil/pcie-mobiveil.c
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.c
@@ -221,7 +221,7 @@ int mobiveil_bringup_link(struct mobiveil_pcie *pcie)
 		usleep_range(LINK_WAIT_MIN, LINK_WAIT_MAX);
 	}
 
-	dev_err(&pcie->pdev->dev, "link never came up\n");
+	dev_info(&pcie->pdev->dev, "link never came up\n");
 
 	return -ETIMEDOUT;
 }
-- 
2.17.1

[PATCH 18/23] PCI: mobiveil: disabled IB and OB windows set by bootloader

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

Disabled all inbound and outbound windows before set up the windows
in kernel, in case transactions match the window set by bootloader.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 .../controller/mobiveil/pcie-mobiveil-host.c   |  7 +++++++
 .../pci/controller/mobiveil/pcie-mobiveil.c    | 18 ++++++++++++++++++
 .../pci/controller/mobiveil/pcie-mobiveil.h    |  2 ++
 3 files changed, 27 insertions(+)

diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
index 4419179f64bc..de24fedcb92d 100644
--- a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
@@ -217,6 +217,13 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 {
 	u32 value, pab_ctrl, type;
 	struct resource_entry *win;
+	int i;
+
+	/* Disable all inbound/outbound windows */
+	for (i = 0; i < pcie->apio_wins; i++)
+		mobiveil_pcie_disable_ob_win(pcie, i);
+	for (i = 0; i < pcie->ppio_wins; i++)
+		mobiveil_pcie_disable_ib_win(pcie, i);
 
 	/* setup bus numbers */
 	value = csr_readl(pcie, PCI_PRIMARY_BUS);
diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.c b/drivers/pci/controller/mobiveil/pcie-mobiveil.c
index 71389ebbf229..cd2a7b9a7a2f 100644
--- a/drivers/pci/controller/mobiveil/pcie-mobiveil.c
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.c
@@ -225,3 +225,21 @@ int mobiveil_bringup_link(struct mobiveil_pcie *pcie)
 
 	return -ETIMEDOUT;
 }
+
+void mobiveil_pcie_disable_ib_win(struct mobiveil_pcie *pci, int win_num)
+{
+	u32 val;
+
+	val = csr_readl(pci, PAB_PEX_AMAP_CTRL(win_num));
+	val &= ~(1 << AMAP_CTRL_EN_SHIFT);
+	csr_writel(pci, val, PAB_PEX_AMAP_CTRL(win_num));
+}
+
+void mobiveil_pcie_disable_ob_win(struct mobiveil_pcie *pci, int win_num)
+{
+	u32 val;
+
+	val = csr_readl(pci, PAB_AXI_AMAP_CTRL(win_num));
+	val &= ~(1 << WIN_ENABLE_SHIFT);
+	csr_writel(pci, val, PAB_AXI_AMAP_CTRL(win_num));
+}
diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.h b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
index eb4cb61291a8..81685840b378 100644
--- a/drivers/pci/controller/mobiveil/pcie-mobiveil.h
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
@@ -171,6 +171,8 @@ void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
 			u64 pci_addr, u32 type, u64 size);
 void program_ib_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
 			u64 pci_addr, u32 type, u64 size);
+void mobiveil_pcie_disable_ob_win(struct mobiveil_pcie *pci, int win_num);
+void mobiveil_pcie_disable_ib_win(struct mobiveil_pcie *pci, int win_num);
 u32 csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size);
 void csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off, size_t size);
 
-- 
2.17.1

[PATCH 19/23] PCI: mobiveil: add Byte and Half-Word width register accessors

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

As there are some Byte and Half-Work width registers in PCIe
configuration space, add Byte and Half-Word width register
accessors.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 .../pci/controller/mobiveil/pcie-mobiveil.h   | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.h b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
index 81685840b378..933c2f34bc52 100644
--- a/drivers/pci/controller/mobiveil/pcie-mobiveil.h
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
@@ -181,9 +181,29 @@ static inline u32 csr_readl(struct mobiveil_pcie *pcie, u32 off)
 	return csr_read(pcie, off, 0x4);
 }
 
+static inline u32 csr_readw(struct mobiveil_pcie *pcie, u32 off)
+{
+	return csr_read(pcie, off, 0x2);
+}
+
+static inline u32 csr_readb(struct mobiveil_pcie *pcie, u32 off)
+{
+	return csr_read(pcie, off, 0x1);
+}
+
 static inline void csr_writel(struct mobiveil_pcie *pcie, u32 val, u32 off)
 {
 	csr_write(pcie, val, off, 0x4);
 }
 
+static inline void csr_writew(struct mobiveil_pcie *pcie, u32 val, u32 off)
+{
+	csr_write(pcie, val, off, 0x2);
+}
+
+static inline void csr_writeb(struct mobiveil_pcie *pcie, u32 val, u32 off)
+{
+	csr_write(pcie, val, off, 0x1);
+}
+
 #endif /* _PCIE_MOBIVEIL_H */
-- 
2.17.1

[PATCH 20/23] PCI: mobiveil: change prototype of function mobiveil_host_init

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

Add a parameter 'bool reinit' to identify re-initializing the
host controller, and export it.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 .../pci/controller/mobiveil/pcie-mobiveil-host.c | 16 +++++++++-------
 drivers/pci/controller/mobiveil/pcie-mobiveil.h  |  1 +
 2 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
index de24fedcb92d..b1d67a697ecc 100644
--- a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
@@ -213,7 +213,7 @@ static void mobiveil_pcie_enable_msi(struct mobiveil_pcie *pcie)
 	writel_relaxed(1, pcie->apb_csr_base + MSI_ENABLE_OFFSET);
 }
 
-static int mobiveil_host_init(struct mobiveil_pcie *pcie)
+int mobiveil_host_init(struct mobiveil_pcie *pcie, bool reinit)
 {
 	u32 value, pab_ctrl, type;
 	struct resource_entry *win;
@@ -225,11 +225,13 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 	for (i = 0; i < pcie->ppio_wins; i++)
 		mobiveil_pcie_disable_ib_win(pcie, i);
 
-	/* setup bus numbers */
-	value = csr_readl(pcie, PCI_PRIMARY_BUS);
-	value &= 0xff000000;
-	value |= 0x00ff0100;
-	csr_writel(pcie, value, PCI_PRIMARY_BUS);
+	if (!reinit) {
+		/* setup bus numbers */
+		value = csr_readl(pcie, PCI_PRIMARY_BUS);
+		value &= 0xff000000;
+		value |= 0x00ff0100;
+		csr_writel(pcie, value, PCI_PRIMARY_BUS);
+	}
 
 	/*
 	 * program Bus Master Enable Bit in Command Register in PAB Config
@@ -570,7 +572,7 @@ int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie)
 	 * configure all inbound and outbound windows and prepare the RC for
 	 * config access
 	 */
-	ret = mobiveil_host_init(pcie);
+	ret = mobiveil_host_init(pcie, false);
 	if (ret) {
 		dev_err(dev, "Failed to initialize host\n");
 		goto error;
diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.h b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
index 933c2f34bc52..51195db09347 100644
--- a/drivers/pci/controller/mobiveil/pcie-mobiveil.h
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
@@ -165,6 +165,7 @@ struct mobiveil_pcie {
 };
 
 int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie);
+int mobiveil_host_init(struct mobiveil_pcie *pcie, bool reinit);
 bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie);
 int mobiveil_bringup_link(struct mobiveil_pcie *pcie);
 void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
-- 
2.17.1

[PATCH 21/23] dt-bindings: pci: Add NXP LX SoCs PCIe controller

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

Add PCIe controller DT bindings of NXP LX series SoCs.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 .../devicetree/bindings/pci/lx-pci.txt        | 52 +++++++++++++++++++
 MAINTAINERS                                   |  8 +++
 2 files changed, 60 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/lx-pci.txt

diff --git a/Documentation/devicetree/bindings/pci/lx-pci.txt b/Documentation/devicetree/bindings/pci/lx-pci.txt
new file mode 100644
index 000000000000..dc602fef93b0
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/lx-pci.txt
@@ -0,0 +1,52 @@
+NXP LX PCIe controller
+
+This PCIe controller is based on the Mobiveil PCIe IP and thus inherits all
+the common properties defined in mobiveil-pcie.txt.
+
+Required properties:
+- compatible: should contain the platform identifier such as:
+  "fsl,lx2160a-pcie"
+- reg: base addresses and lengths of the PCIe controller register blocks.
+  "config_axi_slave": PCIe controller registers
+  "csr_axi_slave": Bridge config registers
+- interrupts: A list of interrupt outputs of the controller. Must contain an
+  entry for each entry in the interrupt-names property.
+- interrupt-names: It could include the following entries:
+  "intr": The interrupt that is asserted for controller interrupts
+  "aer": Asserted for aer interrupt when chip support the aer interrupt with
+		 none MSI/MSI-X/INTx mode,but there is interrupt line for aer.
+  "pme": Asserted for pme interrupt when chip support the pme interrupt with
+		 none MSI/MSI-X/INTx mode,but there is interrupt line for pme.
+- dma-coherent: Indicates that the hardware IP block can ensure the coherency
+  of the data transferred from/to the IP block. This can avoid the software
+  cache flush/invalid actions, and improve the performance significantly.
+- msi-parent : See the generic MSI binding described in
+  Documentation/devicetree/bindings/interrupt-controller/msi.txt.
+
+Example:
+
+	pcie@3400000 {
+		compatible = "fsl,lx2160a-pcie";
+		reg = <0x00 0x03400000 0x0 0x00100000   /* controller registers */
+		       0x80 0x00000000 0x0 0x00001000>; /* configuration space */
+		reg-names = "csr_axi_slave", "config_axi_slave";
+		interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* AER interrupt */
+			     <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* PME interrupt */
+			     <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>; /* controller interrupt */
+		interrupt-names = "aer", "pme", "intr";
+		#address-cells = <3>;
+		#size-cells = <2>;
+		device_type = "pci";
+		apio-wins = <8>;
+		ppio-wins = <8>;
+		dma-coherent;
+		bus-range = <0x0 0xff>;
+		msi-parent = <&its>;
+		ranges = <0x82000000 0x0 0x40000000 0x80 0x40000000 0x0 0x40000000>;
+		#interrupt-cells = <1>;
+		interrupt-map-mask = <0 0 0 7>;
+		interrupt-map = <0000 0 0 1 &gic GIC_SPI 109 IRQ_TYPE_LEVEL_HIGH>,
+				<0000 0 0 2 &gic GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>,
+				<0000 0 0 3 &gic GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>,
+				<0000 0 0 4 &gic GIC_SPI 112 IRQ_TYPE_LEVEL_HIGH>;
+	};
diff --git a/MAINTAINERS b/MAINTAINERS
index 0c57ccff3188..7da555c8e2f5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11252,6 +11252,14 @@ L:	linux-arm-kernel@lists.infradead.org
 S:	Maintained
 F:	drivers/pci/controller/dwc/*layerscape*
 
+PCI DRIVER FOR NXP LX
+M:	Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
+L:	linux-pci@vger.kernel.org
+L:	linux-arm-kernel@lists.infradead.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/pci/lx-pci.txt
+F:	drivers/pci/controller/mobibeil/pci-lx.c
+
 PCI DRIVER FOR GENERIC OF HOSTS
 M:	Will Deacon <will.deacon@arm.com>
 L:	linux-pci@vger.kernel.org
-- 
2.17.1

[PATCH 22/23] PCI: mobiveil: add PCIe RC driver for NXP LX series SoCs

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

This PCIe controller is based on the Mobiveil GPEX IP, which is
compatible with the PCI Express™ Base Specification, Revision 4.0.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 drivers/pci/controller/mobiveil/Kconfig       |  10 +
 drivers/pci/controller/mobiveil/Makefile      |   1 +
 drivers/pci/controller/mobiveil/pci-lx.c      | 222 ++++++++++++++++++
 .../controller/mobiveil/pcie-mobiveil-host.c  |   5 +-
 .../pci/controller/mobiveil/pcie-mobiveil.h   |  15 +-
 5 files changed, 249 insertions(+), 4 deletions(-)
 create mode 100644 drivers/pci/controller/mobiveil/pci-lx.c

diff --git a/drivers/pci/controller/mobiveil/Kconfig b/drivers/pci/controller/mobiveil/Kconfig
index 64343c07bfed..1025448f6d0c 100644
--- a/drivers/pci/controller/mobiveil/Kconfig
+++ b/drivers/pci/controller/mobiveil/Kconfig
@@ -21,4 +21,14 @@ config PCIE_MOBIVEIL_PLAT
 	  Soft IP. It has up to 8 outbound and inbound windows
 	  for address translation and it is a PCIe Gen4 IP.
 
+config PCI_LX
+	bool "Freescale LX PCIe controller"
+	depends on PCI
+	depends on OF && (ARM64 || ARCH_LAYERSCAPE)
+	depends on PCI_MSI_IRQ_DOMAIN
+	select PCIE_MOBIVEIL_HOST
+	help
+	  Say Y here if you want PCIe controller support on LX SoCs.
+	  The PCIe controller can work in RC or EP mode according to
+	  RCW[HOST_AGT_PEX] setting.
 endmenu
diff --git a/drivers/pci/controller/mobiveil/Makefile b/drivers/pci/controller/mobiveil/Makefile
index 9fb6d1c6504d..e5318a334149 100644
--- a/drivers/pci/controller/mobiveil/Makefile
+++ b/drivers/pci/controller/mobiveil/Makefile
@@ -2,3 +2,4 @@
 obj-$(CONFIG_PCIE_MOBIVEIL) += pcie-mobiveil.o
 obj-$(CONFIG_PCIE_MOBIVEIL_HOST) += pcie-mobiveil-host.o
 obj-$(CONFIG_PCIE_MOBIVEIL_PLAT) += pcie-mobiveil-plat.o
+obj-$(CONFIG_PCI_LX) += pci-lx.o
diff --git a/drivers/pci/controller/mobiveil/pci-lx.c b/drivers/pci/controller/mobiveil/pci-lx.c
new file mode 100644
index 000000000000..5308255dc725
--- /dev/null
+++ b/drivers/pci/controller/mobiveil/pci-lx.c
@@ -0,0 +1,222 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PCIe host controller driver for NXP LX SoCs
+ *
+ * Copyright 2018 NXP
+ *
+ * Author: Zhiqiang Hou <Zhiqiang.Hou@nxp.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/of_pci.h>
+#include <linux/of_platform.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/resource.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+
+#include "pcie-mobiveil.h"
+
+/* LUT and PF control registers */
+#define PCIE_LUT_OFF			(0x80000)
+#define PCIE_PF_OFF			(0xc0000)
+#define PCIE_PF_INT_STAT		(0x18)
+#define PF_INT_STAT_PABRST		(31)
+
+#define PCIE_PF_DBG			(0x7fc)
+#define PF_DBG_LTSSM_MASK		(0x3f)
+#define PF_DBG_WE			(31)
+#define PF_DBG_PABR			(27)
+
+#define LX_PCIE_LTSSM_L0		0x2d /* L0 state */
+
+struct lx_pcie {
+	struct mobiveil_pcie *pci;
+	int irq;
+};
+
+#define to_lx_pcie(x)	platform_get_drvdata((x)->pdev)
+
+static inline u32 lx_pcie_lut_readl(struct lx_pcie *pcie, u32 off)
+{
+	return ioread32(pcie->pci->csr_axi_slave_base + PCIE_LUT_OFF + off);
+}
+
+static inline void lx_pcie_lut_writel(struct lx_pcie *pcie, u32 off, u32 val)
+{
+	iowrite32(val, pcie->pci->csr_axi_slave_base + PCIE_LUT_OFF + off);
+}
+
+static inline u32 lx_pcie_pf_readl(struct lx_pcie *pcie, u32 off)
+{
+	return ioread32(pcie->pci->csr_axi_slave_base + PCIE_PF_OFF + off);
+}
+
+static inline void lx_pcie_pf_writel(struct lx_pcie *pcie, u32 off, u32 val)
+{
+	iowrite32(val, pcie->pci->csr_axi_slave_base + PCIE_PF_OFF + off);
+}
+
+static bool lx_pcie_is_bridge(struct lx_pcie *pcie)
+{
+	struct mobiveil_pcie *mv_pci = pcie->pci;
+	u32 header_type;
+
+	header_type = csr_readb(mv_pci, PCI_HEADER_TYPE);
+	header_type &= 0x7f;
+
+	return header_type == PCI_HEADER_TYPE_BRIDGE;
+}
+
+static int lx_pcie_link_up(struct mobiveil_pcie *pci)
+{
+	struct lx_pcie *pcie = to_lx_pcie(pci);
+	u32 state;
+
+	state = lx_pcie_pf_readl(pcie, PCIE_PF_DBG);
+	state =	state & PF_DBG_LTSSM_MASK;
+
+	if (state == LX_PCIE_LTSSM_L0)
+		return 1;
+
+	return 0;
+}
+
+static int lx_pcie_interrupt_init(struct mobiveil_pcie *pcie)
+{
+	return 0;
+}
+
+static struct mobiveil_rp_ops lx_pcie_rp_ops = {
+	.interrupt_init = lx_pcie_interrupt_init,
+};
+
+static const struct mobiveil_pab_ops lx_pcie_pab_ops = {
+	.link_up = lx_pcie_link_up,
+};
+
+static const struct of_device_id lx_pcie_of_match[] = {
+	{ .compatible = "fsl,lx2160a-pcie", },
+	{ },
+};
+
+static void lx_pcie_reinit_hw(struct lx_pcie *pcie)
+{
+	struct mobiveil_pcie *mv_pci = pcie->pci;
+	u32 val, act_stat;
+
+	/* Poll for pab_csb_reset to clear , PAB activity to set */
+	do {
+		val = lx_pcie_pf_readl(pcie, PCIE_PF_INT_STAT);
+		act_stat = csr_readl(mv_pci, PAB_ACTIVITY_STAT);
+
+	} while (((val & (1 << PF_INT_STAT_PABRST)) == 0) || act_stat);
+
+	while (!lx_pcie_link_up(mv_pci))
+		;
+
+	/* clear PEX_RESET bit in PEX_PF0_DBG register */
+	val = lx_pcie_pf_readl(pcie, PCIE_PF_DBG);
+	val |= 1 << PF_DBG_WE;
+	lx_pcie_pf_writel(pcie, PCIE_PF_DBG, val);
+
+	val = lx_pcie_pf_readl(pcie, PCIE_PF_DBG);
+	val |= 1 << PF_DBG_PABR;
+	lx_pcie_pf_writel(pcie, PCIE_PF_DBG, val);
+
+	val = lx_pcie_pf_readl(pcie, PCIE_PF_DBG);
+	val &= ~(1 << PF_DBG_WE);
+	lx_pcie_pf_writel(pcie, PCIE_PF_DBG, val);
+
+	mobiveil_host_init(mv_pci, true);
+}
+
+static irqreturn_t lx_pcie_handler(int irq, void *dev_id)
+{
+	struct lx_pcie *pcie = (struct lx_pcie *)dev_id;
+	struct mobiveil_pcie *mv_pci = pcie->pci;
+	u32 val;
+	u16 ctrl;
+
+	val = csr_readl(mv_pci, PAB_INTP_AMBA_MISC_STAT);
+	if (!val)
+		return IRQ_NONE;
+
+	if (val & PAB_INTP_RESET) {
+		ctrl = csr_readw(mv_pci, PCI_BRIDGE_CONTROL);
+		ctrl &= ~PCI_BRIDGE_CTL_BUS_RESET;
+		csr_writew(mv_pci, ctrl, PCI_BRIDGE_CONTROL);
+		lx_pcie_reinit_hw(pcie);
+	}
+
+	csr_writel(mv_pci, val, PAB_INTP_AMBA_MISC_STAT);
+
+	return IRQ_HANDLED;
+}
+
+static int __init lx_pcie_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct mobiveil_pcie *mv_pci;
+	struct lx_pcie *pcie;
+	struct device_node *np = dev->of_node;
+	int ret;
+
+	if (!of_parse_phandle(np, "msi-parent", 0)) {
+		dev_err(dev, "failed to find msi-parent\n");
+		return -EINVAL;
+	}
+
+	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
+	if (!pcie)
+		return -ENOMEM;
+
+	mv_pci = devm_kzalloc(dev, sizeof(*mv_pci), GFP_KERNEL);
+	if (!mv_pci)
+		return -ENOMEM;
+
+	mv_pci->pdev = pdev;
+	mv_pci->ops = &lx_pcie_pab_ops;
+	mv_pci->rp.ops = &lx_pcie_rp_ops;
+	pcie->pci = mv_pci;
+
+	platform_set_drvdata(pdev, pcie);
+
+	pcie->irq = platform_get_irq_byname(pdev, "intr");
+	if (pcie->irq < 0) {
+		dev_err(&pdev->dev, "Can't get intr irq.\n");
+		return pcie->irq;
+	}
+	ret = devm_request_irq(dev, pcie->irq, lx_pcie_handler,
+			       IRQF_SHARED, pdev->name, pcie);
+	if (ret) {
+		dev_err(dev, "Can't register LX PCIe IRQ.\n");
+		return  ret;
+	}
+
+	ret = mobiveil_pcie_host_probe(mv_pci);
+	if (ret) {
+		dev_err(dev, "pci-lx: fail to probe!\n");
+		return  ret;
+	}
+
+	if (!lx_pcie_is_bridge(pcie))
+		return -ENODEV;
+
+	return 0;
+}
+
+static struct platform_driver lx_pcie_driver = {
+	.driver = {
+		.name = "lx-pcie",
+		.of_match_table = lx_pcie_of_match,
+		.suppress_bind_attrs = true,
+	},
+};
+
+builtin_platform_driver_probe(lx_pcie_driver, lx_pcie_probe);
diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
index b1d67a697ecc..eade5a8002d1 100644
--- a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
@@ -249,8 +249,9 @@ int mobiveil_host_init(struct mobiveil_pcie *pcie, bool reinit)
 	pab_ctrl |= (1 << AMBA_PIO_ENABLE_SHIFT) | (1 << PEX_PIO_ENABLE_SHIFT);
 	csr_writel(pcie, pab_ctrl, PAB_CTRL);
 
-	csr_writel(pcie, (PAB_INTP_INTX_MASK | PAB_INTP_MSI_MASK),
-		   PAB_INTP_AMBA_MISC_ENB);
+	value = PAB_INTP_INTX_MASK | PAB_INTP_MSI | PAB_INTP_RESET |
+		PAB_INTP_PCIE_UE | PAB_INTP_IE_PMREDI | PAB_INTP_IE_EC;
+	csr_writel(pcie, value, PAB_INTP_AMBA_MISC_ENB);
 
 	/*
 	 * program PIO Enable Bit to 1 and Config Window Enable Bit to 1 in
diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.h b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
index 51195db09347..ddd736fa2042 100644
--- a/drivers/pci/controller/mobiveil/pcie-mobiveil.h
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
@@ -41,6 +41,8 @@
 #define  PAGE_LO_MASK			0x3ff
 #define  PAGE_SEL_OFFSET_SHIFT		10
 
+#define PAB_ACTIVITY_STAT		0x81c
+
 #define PAB_AXI_PIO_CTRL		0x0840
 #define  APIO_EN_MASK			0xf
 
@@ -49,8 +51,17 @@
 
 #define PAB_INTP_AMBA_MISC_ENB		0x0b0c
 #define PAB_INTP_AMBA_MISC_STAT		0x0b1c
-#define  PAB_INTP_INTX_MASK		0x01e0
-#define  PAB_INTP_MSI_MASK		0x8
+#define  PAB_INTP_RESET			(0x1 << 1)
+#define  PAB_INTP_MSI			(0x1 << 3)
+#define  PAB_INTP_INTA			(0x1 << 5)
+#define  PAB_INTP_INTB			(0x1 << 6)
+#define  PAB_INTP_INTC			(0x1 << 7)
+#define  PAB_INTP_INTD			(0x1 << 8)
+#define  PAB_INTP_PCIE_UE		(0x1 << 9)
+#define  PAB_INTP_IE_PMREDI		(0x1 << 29)
+#define  PAB_INTP_IE_EC			(0x1 << 30)
+#define  PAB_INTP_INTX_MASK		(PAB_INTP_INTA | PAB_INTP_INTB |\
+					PAB_INTP_INTC | PAB_INTP_INTD)
 
 #define PAB_AXI_AMAP_CTRL(win)		PAB_REG_ADDR(0x0ba0, win)
 #define  WIN_ENABLE_SHIFT		0
-- 
2.17.1

[PATCH 23/23] arm64: dts: freescale: lx2160a: add pcie DT nodes

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 .../arm64/boot/dts/freescale/fsl-lx2160a.dtsi | 157 ++++++++++++++++++
 1 file changed, 157 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi b/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
index 6ba722e373ee..49dfaaf7560d 100644
--- a/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
@@ -953,5 +953,162 @@
 			clock-names = "fspi_en", "fspi";
 			status = "disabled";
 		};
+
+		pcie@3400000 {
+			compatible = "fsl,lx2160a-pcie";
+			reg = <0x00 0x03400000 0x0 0x00100000   /* controller registers */
+			       0x80 0x00000000 0x0 0x00001000>; /* configuration space */
+			reg-names = "csr_axi_slave", "config_axi_slave";
+			interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* AER interrupt */
+				     <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* PME interrupt */
+				     <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>; /* controller interrupt */
+			interrupt-names = "aer", "pme", "intr";
+			#address-cells = <3>;
+			#size-cells = <2>;
+			device_type = "pci";
+			dma-coherent;
+			apio-wins = <8>;
+			ppio-wins = <8>;
+			bus-range = <0x0 0xff>;
+			ranges = <0x82000000 0x0 0x40000000 0x80 0x40000000 0x0 0x40000000>; /* non-prefetchable memory */
+			msi-parent = <&its>;
+			#interrupt-cells = <1>;
+			interrupt-map-mask = <0 0 0 7>;
+			interrupt-map = <0000 0 0 1 &gic 0 0 0 109 IRQ_TYPE_LEVEL_HIGH>,
+					<0000 0 0 2 &gic 0 0 0 110 IRQ_TYPE_LEVEL_HIGH>,
+					<0000 0 0 3 &gic 0 0 0 111 IRQ_TYPE_LEVEL_HIGH>,
+					<0000 0 0 4 &gic 0 0 0 112 IRQ_TYPE_LEVEL_HIGH>;
+		};
+
+		pcie@3500000 {
+			compatible = "fsl,lx2160a-pcie";
+			reg = <0x00 0x03500000 0x0 0x00100000   /* controller registers */
+			       0x88 0x00000000 0x0 0x00001000>; /* configuration space */
+			reg-names = "csr_axi_slave", "config_axi_slave";
+			interrupts = <GIC_SPI 113 IRQ_TYPE_LEVEL_HIGH>, /* AER interrupt */
+				     <GIC_SPI 113 IRQ_TYPE_LEVEL_HIGH>, /* PME interrupt */
+				     <GIC_SPI 113 IRQ_TYPE_LEVEL_HIGH>; /* controller interrupt */
+			interrupt-names = "aer", "pme", "intr";
+			#address-cells = <3>;
+			#size-cells = <2>;
+			device_type = "pci";
+			dma-coherent;
+			apio-wins = <8>;
+			ppio-wins = <8>;
+			bus-range = <0x0 0xff>;
+			ranges = <0x82000000 0x0 0x40000000 0x88 0x40000000 0x0 0x40000000>; /* non-prefetchable memory */
+			msi-parent = <&its>;
+			#interrupt-cells = <1>;
+			interrupt-map-mask = <0 0 0 7>;
+			interrupt-map = <0000 0 0 1 &gic 0 0 0 114 IRQ_TYPE_LEVEL_HIGH>,
+					<0000 0 0 2 &gic 0 0 0 115 IRQ_TYPE_LEVEL_HIGH>,
+					<0000 0 0 3 &gic 0 0 0 116 IRQ_TYPE_LEVEL_HIGH>,
+					<0000 0 0 4 &gic 0 0 0 117 IRQ_TYPE_LEVEL_HIGH>;
+		};
+
+		pcie@3600000 {
+			compatible = "fsl,lx2160a-pcie";
+			reg = <0x00 0x03600000 0x0 0x00100000   /* controller registers */
+			       0x90 0x00000000 0x0 0x00001000>; /* configuration space */
+			reg-names = "csr_axi_slave", "config_axi_slave";
+			interrupts = <GIC_SPI 118 IRQ_TYPE_LEVEL_HIGH>, /* AER interrupt */
+				     <GIC_SPI 118 IRQ_TYPE_LEVEL_HIGH>, /* PME interrupt */
+				     <GIC_SPI 118 IRQ_TYPE_LEVEL_HIGH>; /* controller interrupt */
+			interrupt-names = "aer", "pme", "intr";
+			#address-cells = <3>;
+			#size-cells = <2>;
+			device_type = "pci";
+			dma-coherent;
+			apio-wins = <8>;
+			ppio-wins = <8>;
+			bus-range = <0x0 0xff>;
+			ranges = <0x82000000 0x0 0x40000000 0x90 0x40000000 0x0 0x40000000>; /* non-prefetchable memory */
+			msi-parent = <&its>;
+			#interrupt-cells = <1>;
+			interrupt-map-mask = <0 0 0 7>;
+			interrupt-map = <0000 0 0 1 &gic 0 0 0 119 IRQ_TYPE_LEVEL_HIGH>,
+					<0000 0 0 2 &gic 0 0 0 120 IRQ_TYPE_LEVEL_HIGH>,
+					<0000 0 0 3 &gic 0 0 0 121 IRQ_TYPE_LEVEL_HIGH>,
+					<0000 0 0 4 &gic 0 0 0 122 IRQ_TYPE_LEVEL_HIGH>;
+		};
+
+		pcie@3700000 {
+			compatible = "fsl,lx2160a-pcie";
+			reg = <0x00 0x03700000 0x0 0x00100000   /* controller registers */
+			       0x98 0x00000000 0x0 0x00001000>; /* configuration space */
+			reg-names = "csr_axi_slave", "config_axi_slave";
+			interrupts = <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>, /* AER interrupt */
+				     <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>, /* PME interrupt */
+				     <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>; /* controller interrupt */
+			interrupt-names = "aer", "pme", "intr";
+			#address-cells = <3>;
+			#size-cells = <2>;
+			device_type = "pci";
+			dma-coherent;
+			apio-wins = <8>;
+			ppio-wins = <8>;
+			bus-range = <0x0 0xff>;
+			ranges = <0x82000000 0x0 0x40000000 0x98 0x40000000 0x0 0x40000000>; /* non-prefetchable memory */
+			msi-parent = <&its>;
+			#interrupt-cells = <1>;
+			interrupt-map-mask = <0 0 0 7>;
+			interrupt-map = <0000 0 0 1 &gic 0 0 0 124 IRQ_TYPE_LEVEL_HIGH>,
+					<0000 0 0 2 &gic 0 0 0 125 IRQ_TYPE_LEVEL_HIGH>,
+					<0000 0 0 3 &gic 0 0 0 126 IRQ_TYPE_LEVEL_HIGH>,
+					<0000 0 0 4 &gic 0 0 0 127 IRQ_TYPE_LEVEL_HIGH>;
+		};
+
+		pcie@3800000 {
+			compatible = "fsl,lx2160a-pcie";
+			reg = <0x00 0x03800000 0x0 0x00100000   /* controller registers */
+			       0xa0 0x00000000 0x0 0x00001000>; /* configuration space */
+			reg-names = "csr_axi_slave", "config_axi_slave";
+			interrupts = <GIC_SPI 128 IRQ_TYPE_LEVEL_HIGH>, /* AER interrupt */
+				     <GIC_SPI 128 IRQ_TYPE_LEVEL_HIGH>, /* PME interrupt */
+				     <GIC_SPI 128 IRQ_TYPE_LEVEL_HIGH>; /* controller interrupt */
+			interrupt-names = "aer", "pme", "intr";
+			#address-cells = <3>;
+			#size-cells = <2>;
+			device_type = "pci";
+			dma-coherent;
+			apio-wins = <8>;
+			ppio-wins = <8>;
+			bus-range = <0x0 0xff>;
+			ranges = <0x82000000 0x0 0x40000000 0xa0 0x40000000 0x0 0x40000000>; /* non-prefetchable memory */
+			msi-parent = <&its>;
+			#interrupt-cells = <1>;
+			interrupt-map-mask = <0 0 0 7>;
+			interrupt-map = <0000 0 0 1 &gic 0 0 0 129 IRQ_TYPE_LEVEL_HIGH>,
+					<0000 0 0 2 &gic 0 0 0 130 IRQ_TYPE_LEVEL_HIGH>,
+					<0000 0 0 3 &gic 0 0 0 131 IRQ_TYPE_LEVEL_HIGH>,
+					<0000 0 0 4 &gic 0 0 0 132 IRQ_TYPE_LEVEL_HIGH>;
+		};
+
+		pcie@3900000 {
+			compatible = "fsl,lx2160a-pcie";
+			reg = <0x00 0x03900000 0x0 0x00100000   /* controller registers */
+			       0xa8 0x00000000 0x0 0x00001000>; /* configuration space */
+			reg-names = "csr_axi_slave", "config_axi_slave";
+			interrupts = <GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>, /* AER interrupt */
+				     <GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>, /* PME interrupt */
+				     <GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>; /* controller interrupt */
+			interrupt-names = "aer", "pme", "intr";
+			#address-cells = <3>;
+			#size-cells = <2>;
+			device_type = "pci";
+			dma-coherent;
+			apio-wins = <8>;
+			ppio-wins = <8>;
+			bus-range = <0x0 0xff>;
+			ranges = <0x82000000 0x0 0x40000000 0xa8 0x40000000 0x0 0x40000000>; /* non-prefetchable memory */
+			msi-parent = <&its>;
+			#interrupt-cells = <1>;
+			interrupt-map-mask = <0 0 0 7>;
+			interrupt-map = <0000 0 0 1 &gic 0 0 0 104 IRQ_TYPE_LEVEL_HIGH>,
+					<0000 0 0 2 &gic 0 0 0 105 IRQ_TYPE_LEVEL_HIGH>,
+					<0000 0 0 3 &gic 0 0 0 106 IRQ_TYPE_LEVEL_HIGH>,
+					<0000 0 0 4 &gic 0 0 0 107 IRQ_TYPE_LEVEL_HIGH>;
+		};
+
 	};
 };
-- 
2.17.1

RE: [PATCH 21/23] dt-bindings: pci: Add NXP LX SoCs PCIe controller

[Leo Li]

> -----Original Message-----
> From: Z.q. Hou
> Sent: Tuesday, November 6, 2018 7:21 AM
> To: linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
> devicetree@vger.kernel.org; linux-kernel@vger.kernel.org;
> bhelgaas@google.com; robh+dt@kernel.org; mark.rutland@arm.com;
> l.subrahmanya@mobiveil.co.in; shawnguo@kernel.org; Leo Li
> <leoyang.li@nxp.com>; lorenzo.pieralisi@arm.com
> Cc: Mingkai Hu <mingkai.hu@nxp.com>; M.h. Lian
> <minghuan.lian@nxp.com>; Xiaowei Bao <xiaowei.bao@nxp.com>; Z.q. Hou
> <zhiqiang.hou@nxp.com>
> Subject: [PATCH 21/23] dt-bindings: pci: Add NXP LX SoCs PCIe controller
> 
> From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> 
> Add PCIe controller DT bindings of NXP LX series SoCs.

I'm not sure if this is a good idea to name this controller LX PCIe controller.  Right now, it could be true that it is only used on LX series SoCs.  But I'm not sure if the LS series will not use this controller or LX series will only use this controller in the future.

Since the LX series is still using the layerscape branding, so probably we should keep using the layerscape-pci.txt and define the PCIe Gen4 variant?

Same comment for other places using the LX naming in this driver.

> 
> Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> ---
>  .../devicetree/bindings/pci/lx-pci.txt        | 52 +++++++++++++++++++
>  MAINTAINERS                                   |  8 +++
>  2 files changed, 60 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pci/lx-pci.txt
> 
> diff --git a/Documentation/devicetree/bindings/pci/lx-pci.txt
> b/Documentation/devicetree/bindings/pci/lx-pci.txt
> new file mode 100644
> index 000000000000..dc602fef93b0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/lx-pci.txt
> @@ -0,0 +1,52 @@
> +NXP LX PCIe controller
> +
> +This PCIe controller is based on the Mobiveil PCIe IP and thus inherits
> +all the common properties defined in mobiveil-pcie.txt.
> +
> +Required properties:
> +- compatible: should contain the platform identifier such as:
> +  "fsl,lx2160a-pcie"
> +- reg: base addresses and lengths of the PCIe controller register blocks.
> +  "config_axi_slave": PCIe controller registers
> +  "csr_axi_slave": Bridge config registers
> +- interrupts: A list of interrupt outputs of the controller. Must
> +contain an
> +  entry for each entry in the interrupt-names property.
> +- interrupt-names: It could include the following entries:
> +  "intr": The interrupt that is asserted for controller interrupts
> +  "aer": Asserted for aer interrupt when chip support the aer interrupt with
> +		 none MSI/MSI-X/INTx mode,but there is interrupt line for
> aer.
> +  "pme": Asserted for pme interrupt when chip support the pme interrupt
> with
> +		 none MSI/MSI-X/INTx mode,but there is interrupt line for
> pme.
> +- dma-coherent: Indicates that the hardware IP block can ensure the
> +coherency
> +  of the data transferred from/to the IP block. This can avoid the
> +software
> +  cache flush/invalid actions, and improve the performance significantly.
> +- msi-parent : See the generic MSI binding described in
> +  Documentation/devicetree/bindings/interrupt-controller/msi.txt.
> +
> +Example:
> +
> +	pcie@3400000 {
> +		compatible = "fsl,lx2160a-pcie";
> +		reg = <0x00 0x03400000 0x0 0x00100000   /* controller
> registers */
> +		       0x80 0x00000000 0x0 0x00001000>; /* configuration
> space */
> +		reg-names = "csr_axi_slave", "config_axi_slave";
> +		interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* AER
> interrupt */
> +			     <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* PME
> interrupt */
> +			     <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>; /*
> controller interrupt */
> +		interrupt-names = "aer", "pme", "intr";
> +		#address-cells = <3>;
> +		#size-cells = <2>;
> +		device_type = "pci";
> +		apio-wins = <8>;
> +		ppio-wins = <8>;
> +		dma-coherent;
> +		bus-range = <0x0 0xff>;
> +		msi-parent = <&its>;
> +		ranges = <0x82000000 0x0 0x40000000 0x80 0x40000000 0x0
> 0x40000000>;
> +		#interrupt-cells = <1>;
> +		interrupt-map-mask = <0 0 0 7>;
> +		interrupt-map = <0000 0 0 1 &gic GIC_SPI 109
> IRQ_TYPE_LEVEL_HIGH>,
> +				<0000 0 0 2 &gic GIC_SPI 110
> IRQ_TYPE_LEVEL_HIGH>,
> +				<0000 0 0 3 &gic GIC_SPI 111
> IRQ_TYPE_LEVEL_HIGH>,
> +				<0000 0 0 4 &gic GIC_SPI 112
> IRQ_TYPE_LEVEL_HIGH>;
> +	};
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 0c57ccff3188..7da555c8e2f5 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -11252,6 +11252,14 @@ L:	linux-arm-kernel@lists.infradead.org
>  S:	Maintained
>  F:	drivers/pci/controller/dwc/*layerscape*
> 
> +PCI DRIVER FOR NXP LX
> +M:	Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> +L:	linux-pci@vger.kernel.org
> +L:	linux-arm-kernel@lists.infradead.org
> +S:	Maintained
> +F:	Documentation/devicetree/bindings/pci/lx-pci.txt
> +F:	drivers/pci/controller/mobibeil/pci-lx.c
> +
>  PCI DRIVER FOR GENERIC OF HOSTS
>  M:	Will Deacon <will.deacon@arm.com>
>  L:	linux-pci@vger.kernel.org
> --
> 2.17.1

RE: [PATCH 21/23] dt-bindings: pci: Add NXP LX SoCs PCIe controller

[Z.q. Hou]

Hi Leo,

Thanks a lot for your comments!

> -----Original Message-----
> From: Leo Li
> Sent: 2018年11月9日 5:29
> To: Z.q. Hou <zhiqiang.hou@nxp.com>; linux-pci@vger.kernel.org;
> linux-arm-kernel@lists.infradead.org; devicetree@vger.kernel.org;
> linux-kernel@vger.kernel.org; bhelgaas@google.com; robh+dt@kernel.org;
> mark.rutland@arm.com; l.subrahmanya@mobiveil.co.in;
> shawnguo@kernel.org; lorenzo.pieralisi@arm.com
> Cc: Mingkai Hu <mingkai.hu@nxp.com>; M.h. Lian
> <minghuan.lian@nxp.com>; Xiaowei Bao <xiaowei.bao@nxp.com>
> Subject: RE: [PATCH 21/23] dt-bindings: pci: Add NXP LX SoCs PCIe controller
> 
> 
> 
> > -----Original Message-----
> > From: Z.q. Hou
> > Sent: Tuesday, November 6, 2018 7:21 AM
> > To: linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
> > devicetree@vger.kernel.org; linux-kernel@vger.kernel.org;
> > bhelgaas@google.com; robh+dt@kernel.org; mark.rutland@arm.com;
> > l.subrahmanya@mobiveil.co.in; shawnguo@kernel.org; Leo Li
> > <leoyang.li@nxp.com>; lorenzo.pieralisi@arm.com
> > Cc: Mingkai Hu <mingkai.hu@nxp.com>; M.h. Lian
> > <minghuan.lian@nxp.com>; Xiaowei Bao <xiaowei.bao@nxp.com>; Z.q.
> Hou
> > <zhiqiang.hou@nxp.com>
> > Subject: [PATCH 21/23] dt-bindings: pci: Add NXP LX SoCs PCIe
> > controller
> >
> > From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> >
> > Add PCIe controller DT bindings of NXP LX series SoCs.
> 
> I'm not sure if this is a good idea to name this controller LX PCIe controller.
> Right now, it could be true that it is only used on LX series SoCs.  But I'm not
> sure if the LS series will not use this controller or LX series will only use this
> controller in the future.
> 
> Since the LX series is still using the layerscape branding, so probably we
> should keep using the layerscape-pci.txt and define the PCIe Gen4 variant?

Yes, will add the new PCIe IP bindings to Layerscape-pci.txt.

> 
> Same comment for other places using the LX naming in this driver.

Do you have any suggestion about how to name the driver and prefix of structures in the driver?

> 
> >
> > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> > ---
> >  .../devicetree/bindings/pci/lx-pci.txt        | 52
> +++++++++++++++++++
> >  MAINTAINERS                                   |  8 +++
> >  2 files changed, 60 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/pci/lx-pci.txt
> >
> > diff --git a/Documentation/devicetree/bindings/pci/lx-pci.txt
> > b/Documentation/devicetree/bindings/pci/lx-pci.txt
> > new file mode 100644
> > index 000000000000..dc602fef93b0
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/pci/lx-pci.txt
> > @@ -0,0 +1,52 @@
> > +NXP LX PCIe controller
> > +
> > +This PCIe controller is based on the Mobiveil PCIe IP and thus
> > +inherits all the common properties defined in mobiveil-pcie.txt.
> > +
> > +Required properties:
> > +- compatible: should contain the platform identifier such as:
> > +  "fsl,lx2160a-pcie"
> > +- reg: base addresses and lengths of the PCIe controller register blocks.
> > +  "config_axi_slave": PCIe controller registers
> > +  "csr_axi_slave": Bridge config registers
> > +- interrupts: A list of interrupt outputs of the controller. Must
> > +contain an
> > +  entry for each entry in the interrupt-names property.
> > +- interrupt-names: It could include the following entries:
> > +  "intr": The interrupt that is asserted for controller interrupts
> > +  "aer": Asserted for aer interrupt when chip support the aer interrupt
> with
> > +		 none MSI/MSI-X/INTx mode,but there is interrupt line for
> > aer.
> > +  "pme": Asserted for pme interrupt when chip support the pme
> > + interrupt
> > with
> > +		 none MSI/MSI-X/INTx mode,but there is interrupt line for
> > pme.
> > +- dma-coherent: Indicates that the hardware IP block can ensure the
> > +coherency
> > +  of the data transferred from/to the IP block. This can avoid the
> > +software
> > +  cache flush/invalid actions, and improve the performance significantly.
> > +- msi-parent : See the generic MSI binding described in
> > +  Documentation/devicetree/bindings/interrupt-controller/msi.txt.
> > +
> > +Example:
> > +
> > +	pcie@3400000 {
> > +		compatible = "fsl,lx2160a-pcie";
> > +		reg = <0x00 0x03400000 0x0 0x00100000   /* controller
> > registers */
> > +		       0x80 0x00000000 0x0 0x00001000>; /* configuration
> > space */
> > +		reg-names = "csr_axi_slave", "config_axi_slave";
> > +		interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* AER
> > interrupt */
> > +			     <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* PME
> > interrupt */
> > +			     <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>; /*
> > controller interrupt */
> > +		interrupt-names = "aer", "pme", "intr";
> > +		#address-cells = <3>;
> > +		#size-cells = <2>;
> > +		device_type = "pci";
> > +		apio-wins = <8>;
> > +		ppio-wins = <8>;
> > +		dma-coherent;
> > +		bus-range = <0x0 0xff>;
> > +		msi-parent = <&its>;
> > +		ranges = <0x82000000 0x0 0x40000000 0x80 0x40000000 0x0
> > 0x40000000>;
> > +		#interrupt-cells = <1>;
> > +		interrupt-map-mask = <0 0 0 7>;
> > +		interrupt-map = <0000 0 0 1 &gic GIC_SPI 109
> > IRQ_TYPE_LEVEL_HIGH>,
> > +				<0000 0 0 2 &gic GIC_SPI 110
> > IRQ_TYPE_LEVEL_HIGH>,
> > +				<0000 0 0 3 &gic GIC_SPI 111
> > IRQ_TYPE_LEVEL_HIGH>,
> > +				<0000 0 0 4 &gic GIC_SPI 112
> > IRQ_TYPE_LEVEL_HIGH>;
> > +	};
> > diff --git a/MAINTAINERS b/MAINTAINERS index
> > 0c57ccff3188..7da555c8e2f5 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -11252,6 +11252,14 @@ L:	linux-arm-kernel@lists.infradead.org
> >  S:	Maintained
> >  F:	drivers/pci/controller/dwc/*layerscape*
> >
> > +PCI DRIVER FOR NXP LX
> > +M:	Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> > +L:	linux-pci@vger.kernel.org
> > +L:	linux-arm-kernel@lists.infradead.org
> > +S:	Maintained
> > +F:	Documentation/devicetree/bindings/pci/lx-pci.txt
> > +F:	drivers/pci/controller/mobibeil/pci-lx.c
> > +
> >  PCI DRIVER FOR GENERIC OF HOSTS
> >  M:	Will Deacon <will.deacon@arm.com>
> >  L:	linux-pci@vger.kernel.org
> > --
> > 2.17.1
Thanks,
Zhiqiang

RE: [PATCH 15/23] dt-bindings: pci: mobiveil: change gpio_slave and apb_csr to optional

[Z.q. Hou]

Hi Rob,

Thanks a lot for your ACK!

> -----Original Message-----
> From: Rob Herring <robh@kernel.org>
> Sent: 2018年11月13日 2:13
> To: Z.q. Hou <zhiqiang.hou@nxp.com>
> Cc: linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
> devicetree@vger.kernel.org; linux-kernel@vger.kernel.org;
> bhelgaas@google.com; mark.rutland@arm.com;
> l.subrahmanya@mobiveil.co.in; shawnguo@kernel.org; Leo Li
> <leoyang.li@nxp.com>; lorenzo.pieralisi@arm.com; Mingkai Hu
> <mingkai.hu@nxp.com>; M.h. Lian <minghuan.lian@nxp.com>; Xiaowei Bao
> <xiaowei.bao@nxp.com>
> Subject: Re: [PATCH 15/23] dt-bindings: pci: mobiveil: change gpio_slave and
> apb_csr to optional
> 
> On Tue, Nov 06, 2018 at 01:20:41PM +0000, Z.q. Hou wrote:
> > From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> >
> > Change the "gpio_slave" and "apb_csr" to optional, the "gpio_slave"
> > is not used in current code, and "apb_csr" is not used by some
> > platorms.
> >
> > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> > ---
> >  Documentation/devicetree/bindings/pci/mobiveil-pcie.txt | 2 ++
> >  1 file changed, 2 insertions(+)
> 
> Acked-by: Rob Herring <robh@kernel.org>

Regards,
Zhiqiang

Re: [PATCH 15/23] dt-bindings: pci: mobiveil: change gpio_slave and apb_csr to optional

[Subrahmanya Lingappa]

Acked-by: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>

On Tue, Nov 6, 2018 at 6:50 PM Z.q. Hou <zhiqiang.hou@nxp.com> wrote:
>
> From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
>
> Change the "gpio_slave" and "apb_csr" to optional, the "gpio_slave"
> is not used in current code, and "apb_csr" is not used by some
> platorms.
>
> Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> ---
>  Documentation/devicetree/bindings/pci/mobiveil-pcie.txt | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/pci/mobiveil-pcie.txt b/Documentation/devicetree/bindings/pci/mobiveil-pcie.txt
> index a618d4787dd7..64156993e052 100644
> --- a/Documentation/devicetree/bindings/pci/mobiveil-pcie.txt
> +++ b/Documentation/devicetree/bindings/pci/mobiveil-pcie.txt
> @@ -10,8 +10,10 @@ Required properties:
>         interrupt source. The value must be 1.
>  - compatible: Should contain "mbvl,gpex40-pcie"
>  - reg: Should contain PCIe registers location and length
> +       Mandatory:
>         "config_axi_slave": PCIe controller registers
>         "csr_axi_slave"   : Bridge config registers
> +       Optional:
>         "gpio_slave"      : GPIO registers to control slot power
>         "apb_csr"         : MSI registers
>
> --
> 2.17.1
>

RE: [PATCH 21/23] dt-bindings: pci: Add NXP LX SoCs PCIe controller

[Leo Li]

> -----Original Message-----
> From: Z.q. Hou
> Sent: Sunday, November 11, 2018 5:48 PM
> To: Leo Li <leoyang.li@nxp.com>; linux-pci@vger.kernel.org; linux-arm-
> kernel@lists.infradead.org; devicetree@vger.kernel.org; linux-
> kernel@vger.kernel.org; bhelgaas@google.com; robh+dt@kernel.org;
> mark.rutland@arm.com; l.subrahmanya@mobiveil.co.in;
> shawnguo@kernel.org; lorenzo.pieralisi@arm.com
> Cc: Mingkai Hu <mingkai.hu@nxp.com>; M.h. Lian
> <minghuan.lian@nxp.com>; Xiaowei Bao <xiaowei.bao@nxp.com>
> Subject: RE: [PATCH 21/23] dt-bindings: pci: Add NXP LX SoCs PCIe controller
> 
> Hi Leo,
> 
> Thanks a lot for your comments!
> 
> > -----Original Message-----
> > From: Leo Li
> > Sent: 2018年11月9日 5:29
> > To: Z.q. Hou <zhiqiang.hou@nxp.com>; linux-pci@vger.kernel.org;
> > linux-arm-kernel@lists.infradead.org; devicetree@vger.kernel.org;
> > linux-kernel@vger.kernel.org; bhelgaas@google.com; robh+dt@kernel.org;
> > mark.rutland@arm.com; l.subrahmanya@mobiveil.co.in;
> > shawnguo@kernel.org; lorenzo.pieralisi@arm.com
> > Cc: Mingkai Hu <mingkai.hu@nxp.com>; M.h. Lian
> > <minghuan.lian@nxp.com>; Xiaowei Bao <xiaowei.bao@nxp.com>
> > Subject: RE: [PATCH 21/23] dt-bindings: pci: Add NXP LX SoCs PCIe
> > controller
> >
> >
> >
> > > -----Original Message-----
> > > From: Z.q. Hou
> > > Sent: Tuesday, November 6, 2018 7:21 AM
> > > To: linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
> > > devicetree@vger.kernel.org; linux-kernel@vger.kernel.org;
> > > bhelgaas@google.com; robh+dt@kernel.org; mark.rutland@arm.com;
> > > l.subrahmanya@mobiveil.co.in; shawnguo@kernel.org; Leo Li
> > > <leoyang.li@nxp.com>; lorenzo.pieralisi@arm.com
> > > Cc: Mingkai Hu <mingkai.hu@nxp.com>; M.h. Lian
> > > <minghuan.lian@nxp.com>; Xiaowei Bao <xiaowei.bao@nxp.com>; Z.q.
> > Hou
> > > <zhiqiang.hou@nxp.com>
> > > Subject: [PATCH 21/23] dt-bindings: pci: Add NXP LX SoCs PCIe
> > > controller
> > >
> > > From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> > >
> > > Add PCIe controller DT bindings of NXP LX series SoCs.
> >
> > I'm not sure if this is a good idea to name this controller LX PCIe controller.
> > Right now, it could be true that it is only used on LX series SoCs.
> > But I'm not sure if the LS series will not use this controller or LX
> > series will only use this controller in the future.
> >
> > Since the LX series is still using the layerscape branding, so
> > probably we should keep using the layerscape-pci.txt and define the PCIe
> Gen4 variant?
> 
> Yes, will add the new PCIe IP bindings to Layerscape-pci.txt.
> 
> >
> > Same comment for other places using the LX naming in this driver.
> 
> Do you have any suggestion about how to name the driver and prefix of
> structures in the driver?

Probably something like pcie-layerscape-gen4?

> 
> >
> > >
> > > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> > > ---
> > >  .../devicetree/bindings/pci/lx-pci.txt        | 52
> > +++++++++++++++++++
> > >  MAINTAINERS                                   |  8 +++
> > >  2 files changed, 60 insertions(+)
> > >  create mode 100644 Documentation/devicetree/bindings/pci/lx-pci.txt
> > >
> > > diff --git a/Documentation/devicetree/bindings/pci/lx-pci.txt
> > > b/Documentation/devicetree/bindings/pci/lx-pci.txt
> > > new file mode 100644
> > > index 000000000000..dc602fef93b0
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/pci/lx-pci.txt
> > > @@ -0,0 +1,52 @@
> > > +NXP LX PCIe controller
> > > +
> > > +This PCIe controller is based on the Mobiveil PCIe IP and thus
> > > +inherits all the common properties defined in mobiveil-pcie.txt.
> > > +
> > > +Required properties:
> > > +- compatible: should contain the platform identifier such as:
> > > +  "fsl,lx2160a-pcie"
> > > +- reg: base addresses and lengths of the PCIe controller register blocks.
> > > +  "config_axi_slave": PCIe controller registers
> > > +  "csr_axi_slave": Bridge config registers
> > > +- interrupts: A list of interrupt outputs of the controller. Must
> > > +contain an
> > > +  entry for each entry in the interrupt-names property.
> > > +- interrupt-names: It could include the following entries:
> > > +  "intr": The interrupt that is asserted for controller interrupts
> > > +  "aer": Asserted for aer interrupt when chip support the aer
> > > +interrupt
> > with
> > > +		 none MSI/MSI-X/INTx mode,but there is interrupt line for
> > > aer.
> > > +  "pme": Asserted for pme interrupt when chip support the pme
> > > + interrupt
> > > with
> > > +		 none MSI/MSI-X/INTx mode,but there is interrupt line for
> > > pme.
> > > +- dma-coherent: Indicates that the hardware IP block can ensure the
> > > +coherency
> > > +  of the data transferred from/to the IP block. This can avoid the
> > > +software
> > > +  cache flush/invalid actions, and improve the performance significantly.
> > > +- msi-parent : See the generic MSI binding described in
> > > +  Documentation/devicetree/bindings/interrupt-controller/msi.txt.
> > > +
> > > +Example:
> > > +
> > > +	pcie@3400000 {
> > > +		compatible = "fsl,lx2160a-pcie";
> > > +		reg = <0x00 0x03400000 0x0 0x00100000   /* controller
> > > registers */
> > > +		       0x80 0x00000000 0x0 0x00001000>; /* configuration
> > > space */
> > > +		reg-names = "csr_axi_slave", "config_axi_slave";
> > > +		interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* AER
> > > interrupt */
> > > +			     <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* PME
> > > interrupt */
> > > +			     <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>; /*
> > > controller interrupt */
> > > +		interrupt-names = "aer", "pme", "intr";
> > > +		#address-cells = <3>;
> > > +		#size-cells = <2>;
> > > +		device_type = "pci";
> > > +		apio-wins = <8>;
> > > +		ppio-wins = <8>;
> > > +		dma-coherent;
> > > +		bus-range = <0x0 0xff>;
> > > +		msi-parent = <&its>;
> > > +		ranges = <0x82000000 0x0 0x40000000 0x80 0x40000000 0x0
> > > 0x40000000>;
> > > +		#interrupt-cells = <1>;
> > > +		interrupt-map-mask = <0 0 0 7>;
> > > +		interrupt-map = <0000 0 0 1 &gic GIC_SPI 109
> > > IRQ_TYPE_LEVEL_HIGH>,
> > > +				<0000 0 0 2 &gic GIC_SPI 110
> > > IRQ_TYPE_LEVEL_HIGH>,
> > > +				<0000 0 0 3 &gic GIC_SPI 111
> > > IRQ_TYPE_LEVEL_HIGH>,
> > > +				<0000 0 0 4 &gic GIC_SPI 112
> > > IRQ_TYPE_LEVEL_HIGH>;
> > > +	};
> > > diff --git a/MAINTAINERS b/MAINTAINERS index
> > > 0c57ccff3188..7da555c8e2f5 100644
> > > --- a/MAINTAINERS
> > > +++ b/MAINTAINERS
> > > @@ -11252,6 +11252,14 @@ L:	linux-arm-kernel@lists.infradead.org
> > >  S:	Maintained
> > >  F:	drivers/pci/controller/dwc/*layerscape*
> > >
> > > +PCI DRIVER FOR NXP LX
> > > +M:	Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> > > +L:	linux-pci@vger.kernel.org
> > > +L:	linux-arm-kernel@lists.infradead.org
> > > +S:	Maintained
> > > +F:	Documentation/devicetree/bindings/pci/lx-pci.txt
> > > +F:	drivers/pci/controller/mobibeil/pci-lx.c
> > > +
> > >  PCI DRIVER FOR GENERIC OF HOSTS
> > >  M:	Will Deacon <will.deacon@arm.com>
> > >  L:	linux-pci@vger.kernel.org
> > > --
> > > 2.17.1
> Thanks,
> Zhiqiang

RE: [PATCH 15/23] dt-bindings: pci: mobiveil: change gpio_slave and apb_csr to optional

[Z.q. Hou]

Hi Subrahmanya,

Thanks a lot for your ACK!

Regards,
Zhiqiang

> -----Original Message-----
> From: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
> Sent: 2018年11月14日 17:33
> To: Z.q. Hou <zhiqiang.hou@nxp.com>
> Cc: linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
> devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; Bjorn Helgaas
> <bhelgaas@google.com>; robh+dt@kernel.org; mark.rutland@arm.com;
> shawnguo@kernel.org; Leo Li <leoyang.li@nxp.com>; Lorenzo Pieralisi
> <lorenzo.pieralisi@arm.com>; Mingkai Hu <mingkai.hu@nxp.com>; M.h. Lian
> <minghuan.lian@nxp.com>; Xiaowei Bao <xiaowei.bao@nxp.com>
> Subject: Re: [PATCH 15/23] dt-bindings: pci: mobiveil: change gpio_slave and
> apb_csr to optional
> 
> Acked-by: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
> 
> On Tue, Nov 6, 2018 at 6:50 PM Z.q. Hou <zhiqiang.hou@nxp.com> wrote:
> >
> > From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> >
> > Change the "gpio_slave" and "apb_csr" to optional, the "gpio_slave"
> > is not used in current code, and "apb_csr" is not used by some
> > platorms.
> >
> > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> > ---
> >  Documentation/devicetree/bindings/pci/mobiveil-pcie.txt | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/pci/mobiveil-pcie.txt
> > b/Documentation/devicetree/bindings/pci/mobiveil-pcie.txt
> > index a618d4787dd7..64156993e052 100644
> > --- a/Documentation/devicetree/bindings/pci/mobiveil-pcie.txt
> > +++ b/Documentation/devicetree/bindings/pci/mobiveil-pcie.txt
> > @@ -10,8 +10,10 @@ Required properties:
> >         interrupt source. The value must be 1.
> >  - compatible: Should contain "mbvl,gpex40-pcie"
> >  - reg: Should contain PCIe registers location and length
> > +       Mandatory:
> >         "config_axi_slave": PCIe controller registers
> >         "csr_axi_slave"   : Bridge config registers
> > +       Optional:
> >         "gpio_slave"      : GPIO registers to control slot power
> >         "apb_csr"         : MSI registers
> >
> > --
> > 2.17.1
> >

RE: [PATCH 21/23] dt-bindings: pci: Add NXP LX SoCs PCIe controller

[Z.q. Hou]

Hi Leo,

> -----Original Message-----
> From: Leo Li
> Sent: 2018年11月15日 2:52
> To: Z.q. Hou <zhiqiang.hou@nxp.com>; linux-pci@vger.kernel.org;
> linux-arm-kernel@lists.infradead.org; devicetree@vger.kernel.org;
> linux-kernel@vger.kernel.org; bhelgaas@google.com; robh+dt@kernel.org;
> mark.rutland@arm.com; l.subrahmanya@mobiveil.co.in;
> shawnguo@kernel.org; lorenzo.pieralisi@arm.com
> Cc: Mingkai Hu <mingkai.hu@nxp.com>; M.h. Lian
> <minghuan.lian@nxp.com>; Xiaowei Bao <xiaowei.bao@nxp.com>
> Subject: RE: [PATCH 21/23] dt-bindings: pci: Add NXP LX SoCs PCIe controller
> 
> 
> 
> > -----Original Message-----
> > From: Z.q. Hou
> > Sent: Sunday, November 11, 2018 5:48 PM
> > To: Leo Li <leoyang.li@nxp.com>; linux-pci@vger.kernel.org; linux-arm-
> > kernel@lists.infradead.org; devicetree@vger.kernel.org; linux-
> > kernel@vger.kernel.org; bhelgaas@google.com; robh+dt@kernel.org;
> > mark.rutland@arm.com; l.subrahmanya@mobiveil.co.in;
> > shawnguo@kernel.org; lorenzo.pieralisi@arm.com
> > Cc: Mingkai Hu <mingkai.hu@nxp.com>; M.h. Lian
> > <minghuan.lian@nxp.com>; Xiaowei Bao <xiaowei.bao@nxp.com>
> > Subject: RE: [PATCH 21/23] dt-bindings: pci: Add NXP LX SoCs PCIe
> > controller
> >
> > Hi Leo,
> >
> > Thanks a lot for your comments!
> >
> > > -----Original Message-----
> > > From: Leo Li
> > > Sent: 2018年11月9日 5:29
> > > To: Z.q. Hou <zhiqiang.hou@nxp.com>; linux-pci@vger.kernel.org;
> > > linux-arm-kernel@lists.infradead.org; devicetree@vger.kernel.org;
> > > linux-kernel@vger.kernel.org; bhelgaas@google.com;
> > > robh+dt@kernel.org; mark.rutland@arm.com;
> > > l.subrahmanya@mobiveil.co.in; shawnguo@kernel.org;
> > > lorenzo.pieralisi@arm.com
> > > Cc: Mingkai Hu <mingkai.hu@nxp.com>; M.h. Lian
> > > <minghuan.lian@nxp.com>; Xiaowei Bao <xiaowei.bao@nxp.com>
> > > Subject: RE: [PATCH 21/23] dt-bindings: pci: Add NXP LX SoCs PCIe
> > > controller
> > >
> > >
> > >
> > > > -----Original Message-----
> > > > From: Z.q. Hou
> > > > Sent: Tuesday, November 6, 2018 7:21 AM
> > > > To: linux-pci@vger.kernel.org;
> > > > linux-arm-kernel@lists.infradead.org;
> > > > devicetree@vger.kernel.org; linux-kernel@vger.kernel.org;
> > > > bhelgaas@google.com; robh+dt@kernel.org; mark.rutland@arm.com;
> > > > l.subrahmanya@mobiveil.co.in; shawnguo@kernel.org; Leo Li
> > > > <leoyang.li@nxp.com>; lorenzo.pieralisi@arm.com
> > > > Cc: Mingkai Hu <mingkai.hu@nxp.com>; M.h. Lian
> > > > <minghuan.lian@nxp.com>; Xiaowei Bao <xiaowei.bao@nxp.com>; Z.q.
> > > Hou
> > > > <zhiqiang.hou@nxp.com>
> > > > Subject: [PATCH 21/23] dt-bindings: pci: Add NXP LX SoCs PCIe
> > > > controller
> > > >
> > > > From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> > > >
> > > > Add PCIe controller DT bindings of NXP LX series SoCs.
> > >
> > > I'm not sure if this is a good idea to name this controller LX PCIe controller.
> > > Right now, it could be true that it is only used on LX series SoCs.
> > > But I'm not sure if the LS series will not use this controller or LX
> > > series will only use this controller in the future.
> > >
> > > Since the LX series is still using the layerscape branding, so
> > > probably we should keep using the layerscape-pci.txt and define the
> > > PCIe
> > Gen4 variant?
> >
> > Yes, will add the new PCIe IP bindings to Layerscape-pci.txt.
> >
> > >
> > > Same comment for other places using the LX naming in this driver.
> >
> > Do you have any suggestion about how to name the driver and prefix of
> > structures in the driver?
> 
> Probably something like pcie-layerscape-gen4?

Thanks for your suggestion!
 
Thanks,
Zhiqiang

RE: [PATCH 10/23] PCI: mobiveil: fix the INTx process error

[Z.q. Hou]

Hi Subrahmanya,

As NXP does not integrate Mobiveil's INTx and MSI interrupt controller, I am unable to test this fix.
Can you help to test this fix?

Thanks,
Zhiqiang
> -----Original Message-----
> From: Z.q. Hou
> Sent: 2018年11月6日 21:20
> To: linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
> devicetree@vger.kernel.org; linux-kernel@vger.kernel.org;
> bhelgaas@google.com; robh+dt@kernel.org; mark.rutland@arm.com;
> l.subrahmanya@mobiveil.co.in; shawnguo@kernel.org; Leo Li
> <leoyang.li@nxp.com>; lorenzo.pieralisi@arm.com
> Cc: Mingkai Hu <mingkai.hu@nxp.com>; M.h. Lian
> <minghuan.lian@nxp.com>; Xiaowei Bao <xiaowei.bao@nxp.com>; Z.q. Hou
> <zhiqiang.hou@nxp.com>
> Subject: [PATCH 10/23] PCI: mobiveil: fix the INTx process error
> 
> From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> 
> In the loop block, there is not code change the loop key, this patch updated
> the loop key by re-read the INTx status register.
> 
> This patch also change to clear the handled INTx status.
> 
> Note: Need MV to test this change.
> 
> Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> ---
>  drivers/pci/controller/pcie-mobiveil.c | 13 +++++++++----
>  1 file changed, 9 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/pci/controller/pcie-mobiveil.c
> b/drivers/pci/controller/pcie-mobiveil.c
> index d03392940944..884c9f95374d 100644
> --- a/drivers/pci/controller/pcie-mobiveil.c
> +++ b/drivers/pci/controller/pcie-mobiveil.c
> @@ -361,6 +361,7 @@ static void mobiveil_pcie_isr(struct irq_desc *desc)
>  	/* Handle INTx */
>  	if (intr_status & PAB_INTP_INTX_MASK) {
>  		shifted_status = csr_readl(pcie, PAB_INTP_AMBA_MISC_STAT);
> +		shifted_status &= PAB_INTP_INTX_MASK;
>  		shifted_status >>= PAB_INTX_START;
>  		do {
>  			for_each_set_bit(bit, &shifted_status, PCI_NUM_INTX) { @@
> -372,12 +373,16 @@ static void mobiveil_pcie_isr(struct irq_desc *desc)
>  					dev_err_ratelimited(dev, "unexpected IRQ,
> INT%d\n",
>  							    bit);
> 
> -				/* clear interrupt */
> -				csr_writel(pcie,
> -					   shifted_status << PAB_INTX_START,
> +				/* clear interrupt handled */
> +				csr_writel(pcie, 1 << (PAB_INTX_START + bit),
>  					   PAB_INTP_AMBA_MISC_STAT);
>  			}
> -		} while ((shifted_status >> PAB_INTX_START) != 0);
> +
> +			shifted_status = csr_readl(pcie,
> +						   PAB_INTP_AMBA_MISC_STAT);
> +			shifted_status &= PAB_INTP_INTX_MASK;
> +			shifted_status >>= PAB_INTX_START;
> +		} while (shifted_status != 0);
>  	}
> 
>  	/* read extra MSI status register */
> --
> 2.17.1

Re: [PATCH 00/23] PCI: refactor the Mobiveil driver and add PCIe support for NXP LX SoCs

[Lorenzo Pieralisi]

On Tue, Nov 06, 2018 at 01:19:03PM +0000, Z.q. Hou wrote:
> From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> 
> This patch set is aim to refactor the Mobiveil driver and add
> PCIe support for NXP LX series SoCs.
> 
> Hou Zhiqiang (23):
>   PCI: mobiveil: uniform the register accessors
>   PCI: mobiveil: format the code without function change
>   PCI: mobiveil: correct the returned error number
>   PCI: mobiveil: remove flag MSI_FLAG_MULTI_PCI_MSI
>   PCI: mobiveil: correct PCI base address in MEM/IO outbound windows
>   PCI: mobiveil: replace the resource list iteration function
>   PCI: mobiveil: use WIN_NUM_0 explicitly for CFG outbound window
>   PCI: mobiveil: use the 1st inbound window for MEM inbound transactions
>   PCI: mobiveil: correct the inbound/outbound window setup routine
>   PCI: mobiveil: fix the INTx process error
>   PCI: mobiveil: only fixup the Class Code field
>   PCI: mobiveil: move out the link up waiting from mobiveil_host_init
>   PCI: mobiveil: move irq chained handler setup out of DT parse
>   PCI: mobiveil: initialize Primary/Secondary/Subordinate bus number
>   dt-bindings: pci: mobiveil: change gpio_slave and apb_csr to optional
>   PCI: mobiveil: refactor the Mobiveil driver
>   PCI: mobiveil: continue to initialize the host upon no PCIe link
>   PCI: mobiveil: disabled IB and OB windows set by bootloader
>   PCI: mobiveil: add Byte and Half-Word width register accessors
>   PCI: mobiveil: change prototype of function mobiveil_host_init
>   dt-bindings: pci: Add NXP LX SoCs PCIe controller
>   PCI: mobiveil: add PCIe RC driver for NXP LX series SoCs
>   arm64: dts: freescale: lx2160a: add pcie DT nodes
> 
>  .../devicetree/bindings/pci/lx-pci.txt        |  52 ++
>  .../devicetree/bindings/pci/mobiveil-pcie.txt |   2 +
>  MAINTAINERS                                   |  10 +-
>  .../arm64/boot/dts/freescale/fsl-lx2160a.dtsi | 157 ++++
>  drivers/pci/controller/Kconfig                |  11 +-
>  drivers/pci/controller/Makefile               |   2 +-
>  drivers/pci/controller/mobiveil/Kconfig       |  34 +
>  drivers/pci/controller/mobiveil/Makefile      |   5 +
>  drivers/pci/controller/mobiveil/pci-lx.c      | 222 +++++
>  .../controller/mobiveil/pcie-mobiveil-host.c  | 622 +++++++++++++
>  .../controller/mobiveil/pcie-mobiveil-plat.c  |  54 ++
>  .../pci/controller/mobiveil/pcie-mobiveil.c   | 245 +++++
>  .../pci/controller/mobiveil/pcie-mobiveil.h   | 221 +++++
>  drivers/pci/controller/pcie-mobiveil.c        | 861 ------------------
>  14 files changed, 1625 insertions(+), 873 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/pci/lx-pci.txt
>  create mode 100644 drivers/pci/controller/mobiveil/Kconfig
>  create mode 100644 drivers/pci/controller/mobiveil/Makefile
>  create mode 100644 drivers/pci/controller/mobiveil/pci-lx.c
>  create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
>  create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil-plat.c
>  create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil.c
>  create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil.h
>  delete mode 100644 drivers/pci/controller/pcie-mobiveil.c

Subrahmanya,

for the records, this is the driver *you* are maintaining, aren't you ?

We ask developers to be added to the MAINTAINERS list in order to hold
them accountable, merging a driver upstream means that you need to
actively maintain it, which in turn means reviewing series affecting
its code, like this one.

I will have a look too but it is your responsibility to review these
patches and ACK them accordingly.

So I strongly suggest you start doing it please.

Thanks,
Lorenzo

Re: [PATCH 00/23] PCI: refactor the Mobiveil driver and add PCIe support for NXP LX SoCs

[Subrahmanya Lingappa]

Lorenzo,
You are right, I reviewed few DT files, will need some time to review
this train.
I will start doing it in a while.

Thanks for pitching in.

Thanks.

On Mon, Dec 3, 2018 at 8:58 AM Lorenzo Pieralisi
<lorenzo.pieralisi@arm.com> wrote:
>
> On Tue, Nov 06, 2018 at 01:19:03PM +0000, Z.q. Hou wrote:
> > From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> >
> > This patch set is aim to refactor the Mobiveil driver and add
> > PCIe support for NXP LX series SoCs.
> >
> > Hou Zhiqiang (23):
> >   PCI: mobiveil: uniform the register accessors
> >   PCI: mobiveil: format the code without function change
> >   PCI: mobiveil: correct the returned error number
> >   PCI: mobiveil: remove flag MSI_FLAG_MULTI_PCI_MSI
> >   PCI: mobiveil: correct PCI base address in MEM/IO outbound windows
> >   PCI: mobiveil: replace the resource list iteration function
> >   PCI: mobiveil: use WIN_NUM_0 explicitly for CFG outbound window
> >   PCI: mobiveil: use the 1st inbound window for MEM inbound transactions
> >   PCI: mobiveil: correct the inbound/outbound window setup routine
> >   PCI: mobiveil: fix the INTx process error
> >   PCI: mobiveil: only fixup the Class Code field
> >   PCI: mobiveil: move out the link up waiting from mobiveil_host_init
> >   PCI: mobiveil: move irq chained handler setup out of DT parse
> >   PCI: mobiveil: initialize Primary/Secondary/Subordinate bus number
> >   dt-bindings: pci: mobiveil: change gpio_slave and apb_csr to optional
> >   PCI: mobiveil: refactor the Mobiveil driver
> >   PCI: mobiveil: continue to initialize the host upon no PCIe link
> >   PCI: mobiveil: disabled IB and OB windows set by bootloader
> >   PCI: mobiveil: add Byte and Half-Word width register accessors
> >   PCI: mobiveil: change prototype of function mobiveil_host_init
> >   dt-bindings: pci: Add NXP LX SoCs PCIe controller
> >   PCI: mobiveil: add PCIe RC driver for NXP LX series SoCs
> >   arm64: dts: freescale: lx2160a: add pcie DT nodes
> >
> >  .../devicetree/bindings/pci/lx-pci.txt        |  52 ++
> >  .../devicetree/bindings/pci/mobiveil-pcie.txt |   2 +
> >  MAINTAINERS                                   |  10 +-
> >  .../arm64/boot/dts/freescale/fsl-lx2160a.dtsi | 157 ++++
> >  drivers/pci/controller/Kconfig                |  11 +-
> >  drivers/pci/controller/Makefile               |   2 +-
> >  drivers/pci/controller/mobiveil/Kconfig       |  34 +
> >  drivers/pci/controller/mobiveil/Makefile      |   5 +
> >  drivers/pci/controller/mobiveil/pci-lx.c      | 222 +++++
> >  .../controller/mobiveil/pcie-mobiveil-host.c  | 622 +++++++++++++
> >  .../controller/mobiveil/pcie-mobiveil-plat.c  |  54 ++
> >  .../pci/controller/mobiveil/pcie-mobiveil.c   | 245 +++++
> >  .../pci/controller/mobiveil/pcie-mobiveil.h   | 221 +++++
> >  drivers/pci/controller/pcie-mobiveil.c        | 861 ------------------
> >  14 files changed, 1625 insertions(+), 873 deletions(-)
> >  create mode 100644 Documentation/devicetree/bindings/pci/lx-pci.txt
> >  create mode 100644 drivers/pci/controller/mobiveil/Kconfig
> >  create mode 100644 drivers/pci/controller/mobiveil/Makefile
> >  create mode 100644 drivers/pci/controller/mobiveil/pci-lx.c
> >  create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
> >  create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil-plat.c
> >  create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil.c
> >  create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil.h
> >  delete mode 100644 drivers/pci/controller/pcie-mobiveil.c
>
> Subrahmanya,
>
> for the records, this is the driver *you* are maintaining, aren't you ?
>
> We ask developers to be added to the MAINTAINERS list in order to hold
> them accountable, merging a driver upstream means that you need to
> actively maintain it, which in turn means reviewing series affecting
> its code, like this one.
>
> I will have a look too but it is your responsibility to review these
> patches and ACK them accordingly.
>
> So I strongly suggest you start doing it please.
>
> Thanks,
> Lorenzo