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From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
To: Manivannan Sadhasivam <mani@kernel.org>, Rob Herring <robh@kernel.org>
Cc: linuxarm@huawei.com, mauro.chehab@huawei.com,
	"Mauro Carvalho Chehab" <mchehab+huawei@kernel.org>,
	"Krzysztof Wilczyński" <kw@linux.com>,
	"Binghui Wang" <wangbinghui@hisilicon.com>,
	"Bjorn Helgaas" <bhelgaas@google.com>,
	"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
	"Xiaowei Song" <songxiaowei@hisilicon.com>,
	linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org
Subject: [PATCH v3 7/9] PCI: kirin: use regmap for APB registers
Date: Fri,  9 Jul 2021 12:41:43 +0200	[thread overview]
Message-ID: <f6e980b8de11fca921e876c9facbd996abf6c06b.1625826353.git.mchehab+huawei@kernel.org> (raw)
In-Reply-To: <cover.1625826353.git.mchehab+huawei@kernel.org>

The PHY layer need to access APB registers too, for Kirin 970.
So, place them into a named regmap.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/pci/controller/dwc/pcie-kirin.c | 49 +++++++++++++------------
 1 file changed, 26 insertions(+), 23 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
index a77bbecbf11f..78271dddf2e8 100644
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -54,28 +54,30 @@
 struct kirin_pcie {
 	struct dw_pcie	*pci;
 	struct phy	*phy;
-	void __iomem	*apb_base;
+	struct regmap	*apb;
 };
 
-/* Registers in PCIeCTRL */
-static inline void kirin_apb_ctrl_writel(struct kirin_pcie *kirin_pcie,
-					 u32 val, u32 reg)
-{
-	writel(val, kirin_pcie->apb_base + reg);
-}
-
-static inline u32 kirin_apb_ctrl_readl(struct kirin_pcie *kirin_pcie, u32 reg)
-{
-	return readl(kirin_pcie->apb_base + reg);
-}
+static const struct regmap_config pcie_kirin_regmap_conf = {
+	.name = "kirin_pcie_apb",
+	.reg_bits = 32,
+	.val_bits = 32,
+	.reg_stride = 4,
+};
 
 static long kirin_pcie_get_resource(struct kirin_pcie *kirin_pcie,
 				    struct platform_device *pdev)
 {
-	kirin_pcie->apb_base =
-		devm_platform_ioremap_resource_byname(pdev, "apb");
-	if (IS_ERR(kirin_pcie->apb_base))
-		return PTR_ERR(kirin_pcie->apb_base);
+	struct device *dev = &pdev->dev;
+	void __iomem *apb_base;
+
+	apb_base = devm_platform_ioremap_resource_byname(pdev, "apb");
+	if (IS_ERR(apb_base))
+		return PTR_ERR(apb_base);
+
+	kirin_pcie->apb = devm_regmap_init_mmio(dev, apb_base,
+						&pcie_kirin_regmap_conf);
+	if (IS_ERR(kirin_pcie->apb))
+		return PTR_ERR(kirin_pcie->apb);
 
 	return 0;
 }
@@ -96,13 +98,13 @@ static void kirin_pcie_sideband_dbi_w_mode(struct kirin_pcie *kirin_pcie,
 {
 	u32 val;
 
-	val = kirin_apb_ctrl_readl(kirin_pcie, SOC_PCIECTRL_CTRL0_ADDR);
+	regmap_read(kirin_pcie->apb, SOC_PCIECTRL_CTRL0_ADDR, &val);
 	if (on)
 		val = val | PCIE_ELBI_SLV_DBI_ENABLE;
 	else
 		val = val & ~PCIE_ELBI_SLV_DBI_ENABLE;
 
-	kirin_apb_ctrl_writel(kirin_pcie, val, SOC_PCIECTRL_CTRL0_ADDR);
+	regmap_write(kirin_pcie->apb, SOC_PCIECTRL_CTRL0_ADDR, val);
 }
 
 static void kirin_pcie_sideband_dbi_r_mode(struct kirin_pcie *kirin_pcie,
@@ -110,13 +112,13 @@ static void kirin_pcie_sideband_dbi_r_mode(struct kirin_pcie *kirin_pcie,
 {
 	u32 val;
 
-	val = kirin_apb_ctrl_readl(kirin_pcie, SOC_PCIECTRL_CTRL1_ADDR);
+	regmap_read(kirin_pcie->apb, SOC_PCIECTRL_CTRL1_ADDR, &val);
 	if (on)
 		val = val | PCIE_ELBI_SLV_DBI_ENABLE;
 	else
 		val = val & ~PCIE_ELBI_SLV_DBI_ENABLE;
 
-	kirin_apb_ctrl_writel(kirin_pcie, val, SOC_PCIECTRL_CTRL1_ADDR);
+	regmap_write(kirin_pcie->apb, SOC_PCIECTRL_CTRL1_ADDR, val);
 }
 
 static int kirin_pcie_rd_own_conf(struct pci_bus *bus, unsigned int devfn,
@@ -176,8 +178,9 @@ static void kirin_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base,
 static int kirin_pcie_link_up(struct dw_pcie *pci)
 {
 	struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
-	u32 val = kirin_apb_ctrl_readl(kirin_pcie, PCIE_APB_PHY_STATUS0);
+	u32 val;
 
+	regmap_read(kirin_pcie->apb, PCIE_APB_PHY_STATUS0, &val);
 	if ((val & PCIE_LINKUP_ENABLE) == PCIE_LINKUP_ENABLE)
 		return 1;
 
@@ -189,8 +192,8 @@ static int kirin_pcie_start_link(struct dw_pcie *pci)
 	struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
 
 	/* assert LTSSM enable */
-	kirin_apb_ctrl_writel(kirin_pcie, PCIE_LTSSM_ENABLE_BIT,
-			      PCIE_APP_LTSSM_ENABLE);
+	regmap_write(kirin_pcie->apb, PCIE_APP_LTSSM_ENABLE,
+		     PCIE_LTSSM_ENABLE_BIT);
 
 	return 0;
 }
-- 
2.31.1


  parent reply	other threads:[~2021-07-09 10:41 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-09 10:41 [PATCH v3 0/9] Add support for Hikey 970 PCIe Mauro Carvalho Chehab
2021-07-09 10:41 ` [PATCH v3 1/9] dt-bindings: phy: add bindings for Hikey 960 PCIe PHY Mauro Carvalho Chehab
2021-07-09 10:41 ` [PATCH v3 2/9] dt-bindings: phy: add bindings for Hikey 970 " Mauro Carvalho Chehab
2021-07-09 10:41 ` [PATCH v3 3/9] dt-bindings: PCI: kirin: fix compatible string Mauro Carvalho Chehab
2021-07-09 10:41 ` [PATCH v3 4/9] dt-bindings: PCI: kirin: drop PHY properties Mauro Carvalho Chehab
2021-07-09 10:41 ` [PATCH v3 5/9] phy: hisilicon: add a PHY driver for Kirin 960 Mauro Carvalho Chehab
2021-07-09 10:41 ` [PATCH v3 6/9] PCI: kirin: drop the PHY logic from the driver Mauro Carvalho Chehab
2021-07-09 10:41 ` Mauro Carvalho Chehab [this message]
2021-07-09 10:41 ` [PATCH v3 8/9] phy: hisilicon: add driver for Kirin 970 PCIe PHY Mauro Carvalho Chehab
2021-07-12  8:16   ` Manivannan Sadhasivam
2021-07-09 10:41 ` [PATCH v3 9/9] arm64: dts: hisilicon: Add support for HiKey 970 PCIe controller hardware Mauro Carvalho Chehab
2021-07-12  8:19 ` [PATCH v3 0/9] Add support for Hikey 970 PCIe Manivannan Sadhasivam
2021-07-12 21:49   ` Mauro Carvalho Chehab
2021-07-12 16:52 ` Bjorn Helgaas
2021-07-12 21:11   ` Mauro Carvalho Chehab

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