[PATCH 0/6] ARM: AM437x: Add IO wake up support

[PATCH 0/6] ARM: AM437x: Add IO wake up support

[Keerthy]

The patch series adds IO wake up support for AM437x series
making use of the existing OMAP4 support. Adds the AM437x
specifics.

The series is boot tested on OMAP4 panda, DAR7 evm and AM437x evms.
I do not have OMAP3 boards so not able to test on OMAP3.

Keerthy (6):
  ARM: OMAP4: PRM: Remove hardcoding of PRM_IO_PMCTRL_OFFSET register
  ARM: AM43xx: Add the PRM IRQ register offsets
  ARM: dts: AM4372: Add PRCM IRQ entry
  ARM: OMAP: PRM: Remove hardcoding of IRQENABLE_MPU_2 and
    IRQSTATUS_MPU_2 register offsets
  ARM: OMAP4+: PRM: Add AM437x specific data
  ARM: PRM: AM437x: Enable IO wakeup feature

 arch/arm/boot/dts/am4372.dtsi     |  1 +
 arch/arm/mach-omap2/prcm-common.h |  9 +++---
 arch/arm/mach-omap2/prcm43xx.h    |  5 +++
 arch/arm/mach-omap2/prm3xxx.c     | 20 ++++++------
 arch/arm/mach-omap2/prm44xx.c     | 65 +++++++++++++++++++++++----------------
 arch/arm/mach-omap2/prm_common.c  |  6 ++--
 6 files changed, 63 insertions(+), 43 deletions(-)

-- 
1.9.1

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[PATCH 1/6] ARM: OMAP4: PRM: Remove hardcoding of PRM_IO_PMCTRL_OFFSET register

[Keerthy]

PRM_IO_PMCTRL_OFFSET need not be same for all SOCs hence
remove hardcoding and use the value provided by the omap_prcm_irq_setup
structure.

Signed-off-by: Keerthy <j-keerthy@ti.com>
---
 arch/arm/mach-omap2/prcm-common.h |  1 +
 arch/arm/mach-omap2/prm44xx.c     | 11 ++++++-----
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/arch/arm/mach-omap2/prcm-common.h b/arch/arm/mach-omap2/prcm-common.h
index 6ae0b3a..2e60406 100644
--- a/arch/arm/mach-omap2/prcm-common.h
+++ b/arch/arm/mach-omap2/prcm-common.h
@@ -494,6 +494,7 @@ struct omap_prcm_irq {
 struct omap_prcm_irq_setup {
 	u16 ack;
 	u16 mask;
+	u16 pm_ctrl;
 	u8 nr_regs;
 	u8 nr_irqs;
 	const struct omap_prcm_irq *irqs;
diff --git a/arch/arm/mach-omap2/prm44xx.c b/arch/arm/mach-omap2/prm44xx.c
index 4541700..8149e5a 100644
--- a/arch/arm/mach-omap2/prm44xx.c
+++ b/arch/arm/mach-omap2/prm44xx.c
@@ -45,6 +45,7 @@ static const struct omap_prcm_irq omap4_prcm_irqs[] = {
 static struct omap_prcm_irq_setup omap4_prcm_irq_setup = {
 	.ack			= OMAP4_PRM_IRQSTATUS_MPU_OFFSET,
 	.mask			= OMAP4_PRM_IRQENABLE_MPU_OFFSET,
+	.pm_ctrl		= OMAP4_PRM_IO_PMCTRL_OFFSET,
 	.nr_regs		= 2,
 	.irqs			= omap4_prcm_irqs,
 	.nr_irqs		= ARRAY_SIZE(omap4_prcm_irqs),
@@ -306,10 +307,10 @@ static void omap44xx_prm_reconfigure_io_chain(void)
 	omap4_prm_rmw_inst_reg_bits(OMAP4430_WUCLK_CTRL_MASK,
 				    OMAP4430_WUCLK_CTRL_MASK,
 				    inst,
-				    OMAP4_PRM_IO_PMCTRL_OFFSET);
+				    omap4_prcm_irq_setup.pm_ctrl);
 	omap_test_timeout(
 		(((omap4_prm_read_inst_reg(inst,
-					   OMAP4_PRM_IO_PMCTRL_OFFSET) &
+					   omap4_prcm_irq_setup.pm_ctrl) &
 		   OMAP4430_WUCLK_STATUS_MASK) >>
 		  OMAP4430_WUCLK_STATUS_SHIFT) == 1),
 		MAX_IOPAD_LATCH_TIME, i);
@@ -319,10 +320,10 @@ static void omap44xx_prm_reconfigure_io_chain(void)
 	/* Trigger WUCLKIN disable */
 	omap4_prm_rmw_inst_reg_bits(OMAP4430_WUCLK_CTRL_MASK, 0x0,
 				    inst,
-				    OMAP4_PRM_IO_PMCTRL_OFFSET);
+				    omap4_prcm_irq_setup.pm_ctrl);
 	omap_test_timeout(
 		(((omap4_prm_read_inst_reg(inst,
-					   OMAP4_PRM_IO_PMCTRL_OFFSET) &
+					   omap4_prcm_irq_setup.pm_ctrl) &
 		   OMAP4430_WUCLK_STATUS_MASK) >>
 		  OMAP4430_WUCLK_STATUS_SHIFT) == 0),
 		MAX_IOPAD_LATCH_TIME, i);
@@ -350,7 +351,7 @@ static void __init omap44xx_prm_enable_io_wakeup(void)
 	omap4_prm_rmw_inst_reg_bits(OMAP4430_GLOBAL_WUEN_MASK,
 				    OMAP4430_GLOBAL_WUEN_MASK,
 				    inst,
-				    OMAP4_PRM_IO_PMCTRL_OFFSET);
+				    omap4_prcm_irq_setup.pm_ctrl);
 }
 
 /**
-- 
1.9.1

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[PATCH 2/6] ARM: AM43xx: Add the PRM IRQ register offsets

[Keerthy]

Add the PRM IRQ register offsets.

Signed-off-by: Keerthy <j-keerthy@ti.com>
---
 arch/arm/mach-omap2/prcm43xx.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/mach-omap2/prcm43xx.h b/arch/arm/mach-omap2/prcm43xx.h
index d026199..ec1ac5c 100644
--- a/arch/arm/mach-omap2/prcm43xx.h
+++ b/arch/arm/mach-omap2/prcm43xx.h
@@ -25,6 +25,10 @@
 #define AM43XX_PRM_WKUP_INST				0x2000
 #define AM43XX_PRM_DEVICE_INST				0x4000
 
+/* PRM_IRQ offsets */
+#define AM43XX_PRM_IRQSTATUS_MPU_OFFSET			0x0004
+#define AM43XX_PRM_IRQENABLE_MPU_OFFSET			0x0008
+
 /* RM RSTCTRL offsets */
 #define AM43XX_RM_PER_RSTCTRL_OFFSET			0x0010
 #define AM43XX_RM_GFX_RSTCTRL_OFFSET			0x0010
@@ -146,4 +150,5 @@
 #define AM43XX_CM_PER_HDQ1W_CLKCTRL_OFFSET		0x04a0
 #define AM43XX_CM_PER_VPFE0_CLKCTRL_OFFSET		0x0068
 #define AM43XX_CM_PER_VPFE1_CLKCTRL_OFFSET		0x0070
+#define AM43XX_PRM_IO_PMCTRL_OFFSET			0x0024
 #endif
-- 
1.9.1

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[PATCH 3/6] ARM: dts: AM4372: Add PRCM IRQ entry

[Keerthy]

Add PRCM IRQ entry.

Signed-off-by: Keerthy <j-keerthy@ti.com>
---
 arch/arm/boot/dts/am4372.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/am4372.dtsi b/arch/arm/boot/dts/am4372.dtsi
index 1680602..7bcdeb2 100644
--- a/arch/arm/boot/dts/am4372.dtsi
+++ b/arch/arm/boot/dts/am4372.dtsi
@@ -86,6 +86,7 @@
 			prcm: prcm@1f0000 {
 				compatible = "ti,am4-prcm";
 				reg = <0x1f0000 0x11000>;
+				interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>;
 
 				prcm_clocks: clocks {
 					#address-cells = <1>;
-- 
1.9.1

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[PATCH 4/6] ARM: OMAP: PRM: Remove hardcoding of IRQENABLE_MPU_2 and IRQSTATUS_MPU_2 register offsets

[Keerthy]

The register offsets of IRQENABLE_MPU_2 and IRQSTATUS_MPU_2 are hardcoded.
This makes it difficult to reuse the code for single core SoCs like AM437x.
Hence making it part of omap_prcm_irq_setup structure so that case of
single set of IRQ* registers can be handled generically.

Signed-off-by: Keerthy <j-keerthy@ti.com>
---
 arch/arm/mach-omap2/prcm-common.h |  8 ++++----
 arch/arm/mach-omap2/prm3xxx.c     | 20 +++++++++---------
 arch/arm/mach-omap2/prm44xx.c     | 43 +++++++++++++++++++++------------------
 arch/arm/mach-omap2/prm_common.c  |  5 ++---
 4 files changed, 39 insertions(+), 37 deletions(-)

diff --git a/arch/arm/mach-omap2/prcm-common.h b/arch/arm/mach-omap2/prcm-common.h
index 2e60406..99447e7 100644
--- a/arch/arm/mach-omap2/prcm-common.h
+++ b/arch/arm/mach-omap2/prcm-common.h
@@ -470,8 +470,8 @@ struct omap_prcm_irq {
 
 /**
  * struct omap_prcm_irq_setup - PRCM interrupt controller details
- * @ack: PRM register offset for the first PRM_IRQSTATUS_MPU register
- * @mask: PRM register offset for the first PRM_IRQENABLE_MPU register
+ * @ack: PRM register offsets for the PRM_IRQSTATUS_MPU registers
+ * @mask: PRM register offsets for the PRM_IRQENABLE_MPU registers
  * @nr_regs: number of PRM_IRQ{STATUS,ENABLE}_MPU* registers
  * @nr_irqs: number of entries in the @irqs array
  * @irqs: ptr to an array of PRCM interrupt bits (see @nr_irqs)
@@ -492,8 +492,8 @@ struct omap_prcm_irq {
  * specified in static initializers.
  */
 struct omap_prcm_irq_setup {
-	u16 ack;
-	u16 mask;
+	u16 ack[2];
+	u16 mask[2];
 	u16 pm_ctrl;
 	u8 nr_regs;
 	u8 nr_irqs;
diff --git a/arch/arm/mach-omap2/prm3xxx.c b/arch/arm/mach-omap2/prm3xxx.c
index 62680aa..56649b0 100644
--- a/arch/arm/mach-omap2/prm3xxx.c
+++ b/arch/arm/mach-omap2/prm3xxx.c
@@ -42,8 +42,8 @@ static const struct omap_prcm_irq omap3_prcm_irqs[] = {
 };
 
 static struct omap_prcm_irq_setup omap3_prcm_irq_setup = {
-	.ack			= OMAP3_PRM_IRQSTATUS_MPU_OFFSET,
-	.mask			= OMAP3_PRM_IRQENABLE_MPU_OFFSET,
+	.ack[0]			= OMAP3_PRM_IRQSTATUS_MPU_OFFSET,
+	.mask[0]		= OMAP3_PRM_IRQENABLE_MPU_OFFSET,
 	.nr_regs		= 1,
 	.irqs			= omap3_prcm_irqs,
 	.nr_irqs		= ARRAY_SIZE(omap3_prcm_irqs),
@@ -103,7 +103,7 @@ static u32 omap3_prm_vp_check_txdone(u8 vp_id)
 	u32 irqstatus;
 
 	irqstatus = omap2_prm_read_mod_reg(OCP_MOD,
-					   OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
+					   omap3_prcm_irq_setup.ack[0]);
 	return irqstatus & vp->tranxdone_status;
 }
 
@@ -112,7 +112,7 @@ static void omap3_prm_vp_clear_txdone(u8 vp_id)
 	struct omap3_vp *vp = &omap3_vp[vp_id];
 
 	omap2_prm_write_mod_reg(vp->tranxdone_status,
-				OCP_MOD, OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
+				OCP_MOD, omap3_prcm_irq_setup.ack[0]);
 }
 
 u32 omap3_prm_vcvp_read(u8 offset)
@@ -158,8 +158,8 @@ static void omap3xxx_prm_read_pending_irqs(unsigned long *events)
 	u32 mask, st;
 
 	/* XXX Can the mask read be avoided (e.g., can it come from RAM?) */
-	mask = omap2_prm_read_mod_reg(OCP_MOD, OMAP3_PRM_IRQENABLE_MPU_OFFSET);
-	st = omap2_prm_read_mod_reg(OCP_MOD, OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
+	mask = omap2_prm_read_mod_reg(OCP_MOD, omap3_prcm_irq_setup.mask[0]);
+	st = omap2_prm_read_mod_reg(OCP_MOD, omap3_prcm_irq_setup.ack[0]);
 
 	events[0] = mask & st;
 }
@@ -191,8 +191,8 @@ static void omap3xxx_prm_ocp_barrier(void)
 static void omap3xxx_prm_save_and_clear_irqen(u32 *saved_mask)
 {
 	saved_mask[0] = omap2_prm_read_mod_reg(OCP_MOD,
-					       OMAP3_PRM_IRQENABLE_MPU_OFFSET);
-	omap2_prm_write_mod_reg(0, OCP_MOD, OMAP3_PRM_IRQENABLE_MPU_OFFSET);
+					       omap3_prcm_irq_setup.mask[0]);
+	omap2_prm_write_mod_reg(0, OCP_MOD, omap3_prcm_irq_setup.mask[0]);
 
 	/* OCP barrier */
 	omap2_prm_read_mod_reg(OCP_MOD, OMAP3_PRM_REVISION_OFFSET);
@@ -211,7 +211,7 @@ static void omap3xxx_prm_save_and_clear_irqen(u32 *saved_mask)
 static void omap3xxx_prm_restore_irqen(u32 *saved_mask)
 {
 	omap2_prm_write_mod_reg(saved_mask[0], OCP_MOD,
-				OMAP3_PRM_IRQENABLE_MPU_OFFSET);
+				omap3_prcm_irq_setup.mask[0]);
 }
 
 /**
@@ -367,7 +367,7 @@ void __init omap3_prm_init_pm(bool has_uart4, bool has_iva)
 				OMAP2_RM_RSTST);
 
 	/* Clear any pending PRCM interrupts */
-	omap2_prm_write_mod_reg(0, OCP_MOD, OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
+	omap2_prm_write_mod_reg(0, OCP_MOD, omap3_prcm_irq_setup.ack[0]);
 
 	/* We need to idle iva2_pwrdm even on am3703 with no iva2. */
 	omap3xxx_prm_iva_idle();
diff --git a/arch/arm/mach-omap2/prm44xx.c b/arch/arm/mach-omap2/prm44xx.c
index 8149e5a..20b547a 100644
--- a/arch/arm/mach-omap2/prm44xx.c
+++ b/arch/arm/mach-omap2/prm44xx.c
@@ -43,8 +43,10 @@ static const struct omap_prcm_irq omap4_prcm_irqs[] = {
 };
 
 static struct omap_prcm_irq_setup omap4_prcm_irq_setup = {
-	.ack			= OMAP4_PRM_IRQSTATUS_MPU_OFFSET,
-	.mask			= OMAP4_PRM_IRQENABLE_MPU_OFFSET,
+	.ack[0]			= OMAP4_PRM_IRQSTATUS_MPU_OFFSET,
+	.mask[0]		= OMAP4_PRM_IRQENABLE_MPU_OFFSET,
+	.ack[1]			= OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET,
+	.mask[1]		= OMAP4_PRM_IRQENABLE_MPU_2_OFFSET,
 	.pm_ctrl		= OMAP4_PRM_IO_PMCTRL_OFFSET,
 	.nr_regs		= 2,
 	.irqs			= omap4_prcm_irqs,
@@ -217,11 +219,11 @@ static inline u32 _read_pending_irq_reg(u16 irqen_offs, u16 irqst_offs)
  */
 static void omap44xx_prm_read_pending_irqs(unsigned long *events)
 {
-	events[0] = _read_pending_irq_reg(OMAP4_PRM_IRQENABLE_MPU_OFFSET,
-					  OMAP4_PRM_IRQSTATUS_MPU_OFFSET);
+	int i;
 
-	events[1] = _read_pending_irq_reg(OMAP4_PRM_IRQENABLE_MPU_2_OFFSET,
-					  OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET);
+	for (i = 0; i < omap4_prcm_irq_setup.nr_regs; i++)
+		events[i] = _read_pending_irq_reg(omap4_prcm_irq_setup.mask[i],
+						  omap4_prcm_irq_setup.ack[i]);
 }
 
 /**
@@ -251,17 +253,16 @@ static void omap44xx_prm_ocp_barrier(void)
  */
 static void omap44xx_prm_save_and_clear_irqen(u32 *saved_mask)
 {
-	saved_mask[0] =
-		omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
-					OMAP4_PRM_IRQENABLE_MPU_OFFSET);
-	saved_mask[1] =
-		omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
-					OMAP4_PRM_IRQENABLE_MPU_2_OFFSET);
+	int i;
 
-	omap4_prm_write_inst_reg(0, OMAP4430_PRM_OCP_SOCKET_INST,
-				 OMAP4_PRM_IRQENABLE_MPU_OFFSET);
-	omap4_prm_write_inst_reg(0, OMAP4430_PRM_OCP_SOCKET_INST,
-				 OMAP4_PRM_IRQENABLE_MPU_2_OFFSET);
+	for (i = 0; i < omap4_prcm_irq_setup.nr_regs; i++) {
+		saved_mask[i] =
+			omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
+						omap4_prcm_irq_setup.mask[i]);
+
+		omap4_prm_write_inst_reg(0, OMAP4430_PRM_OCP_SOCKET_INST,
+					 omap4_prcm_irq_setup.mask[i]);
+	}
 
 	/* OCP barrier */
 	omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
@@ -280,10 +281,12 @@ static void omap44xx_prm_save_and_clear_irqen(u32 *saved_mask)
  */
 static void omap44xx_prm_restore_irqen(u32 *saved_mask)
 {
-	omap4_prm_write_inst_reg(saved_mask[0], OMAP4430_PRM_OCP_SOCKET_INST,
-				 OMAP4_PRM_IRQENABLE_MPU_OFFSET);
-	omap4_prm_write_inst_reg(saved_mask[1], OMAP4430_PRM_OCP_SOCKET_INST,
-				 OMAP4_PRM_IRQENABLE_MPU_2_OFFSET);
+	int i;
+
+	for (i = 0; i < omap4_prcm_irq_setup.nr_regs; i++)
+		omap4_prm_write_inst_reg(saved_mask[i],
+					 OMAP4430_PRM_OCP_SOCKET_INST,
+					 omap4_prcm_irq_setup.mask[i]);
 }
 
 /**
diff --git a/arch/arm/mach-omap2/prm_common.c b/arch/arm/mach-omap2/prm_common.c
index 7add799..10ef0da 100644
--- a/arch/arm/mach-omap2/prm_common.c
+++ b/arch/arm/mach-omap2/prm_common.c
@@ -281,7 +281,6 @@ int omap_prcm_register_chain_handler(struct omap_prcm_irq_setup *irq_setup)
 		pr_err("PRCM: already initialized; won't reinitialize\n");
 		return -EINVAL;
 	}
-
 	if (nr_regs > OMAP_PRCM_MAX_NR_PENDING_REG) {
 		pr_err("PRCM: nr_regs too large\n");
 		return -EINVAL;
@@ -339,8 +338,8 @@ int omap_prcm_register_chain_handler(struct omap_prcm_irq_setup *irq_setup)
 		ct->chip.irq_mask = irq_gc_mask_clr_bit;
 		ct->chip.irq_unmask = irq_gc_mask_set_bit;
 
-		ct->regs.ack = irq_setup->ack + i * 4;
-		ct->regs.mask = irq_setup->mask + i * 4;
+		ct->regs.ack = irq_setup->ack[i];
+		ct->regs.mask = irq_setup->mask[i];
 
 		irq_setup_generic_chip(gc, mask[i], 0, IRQ_NOREQUEST, 0);
 		prcm_irq_chips[i] = gc;
-- 
1.9.1

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[PATCH 5/6] ARM: OMAP4+: PRM: Add AM437x specific data

[Keerthy]

The register offsets for some of the PRM Registers are different
hence populating the differing fields.

Signed-off-by: Keerthy <j-keerthy@ti.com>
---
 arch/arm/mach-omap2/prm44xx.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-omap2/prm44xx.c b/arch/arm/mach-omap2/prm44xx.c
index 20b547a..686bcab 100644
--- a/arch/arm/mach-omap2/prm44xx.c
+++ b/arch/arm/mach-omap2/prm44xx.c
@@ -18,13 +18,14 @@
 #include <linux/err.h>
 #include <linux/io.h>
 #include <linux/of_irq.h>
-
+#include <linux/of.h>
 
 #include "soc.h"
 #include "iomap.h"
 #include "common.h"
 #include "vp.h"
 #include "prm44xx.h"
+#include "prcm43xx.h"
 #include "prm-regbits-44xx.h"
 #include "prcm44xx.h"
 #include "prminst44xx.h"
@@ -723,6 +724,14 @@ int __init omap44xx_prm_init(const struct omap_prcm_init_data *data)
 
 	omap4_prminst_set_prm_dev_inst(data->device_inst_offset);
 
+	/* Add AM437X specific differences */
+	if (of_device_is_compatible(data->np, "ti,am4-prcm")) {
+		omap4_prcm_irq_setup.nr_irqs = 1;
+		omap4_prcm_irq_setup.pm_ctrl = AM43XX_PRM_IO_PMCTRL_OFFSET;
+		omap4_prcm_irq_setup.ack[0] = AM43XX_PRM_IRQSTATUS_MPU_OFFSET;
+		omap4_prcm_irq_setup.mask[0] = AM43XX_PRM_IRQENABLE_MPU_OFFSET;
+	}
+
 	return prm_register(&omap44xx_prm_ll_data);
 }
 
-- 
1.9.1

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[PATCH 6/6] ARM: PRM: AM437x: Enable IO wakeup feature

[Keerthy]

Enable IO wakeup feature.

Signed-off-by: Keerthy <j-keerthy@ti.com>
---
 arch/arm/mach-omap2/prm_common.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-omap2/prm_common.c b/arch/arm/mach-omap2/prm_common.c
index 10ef0da..238cb4a 100644
--- a/arch/arm/mach-omap2/prm_common.c
+++ b/arch/arm/mach-omap2/prm_common.c
@@ -695,6 +695,7 @@ static struct omap_prcm_init_data am4_prm_data __initdata = {
 	.index = TI_CLKM_PRM,
 	.init = omap44xx_prm_init,
 	.device_inst_offset = AM43XX_PRM_DEVICE_INST,
+	.flags = PRM_HAS_IO_WAKEUP,
 };
 #endif
 
-- 
1.9.1

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Re: [PATCH 4/6] ARM: OMAP: PRM: Remove hardcoding of IRQENABLE_MPU_2 and IRQSTATUS_MPU_2 register offsets

[Tero Kristo]

On 06/22/2015 09:22 AM, Keerthy wrote:
> The register offsets of IRQENABLE_MPU_2 and IRQSTATUS_MPU_2 are hardcoded.
> This makes it difficult to reuse the code for single core SoCs like AM437x.

Single core vs. having two sets of IRQENABLE / IRQSTATUS registers do 
not have any relation to each other. OMAP4+ has two IRQ registers, 
because the number of IRQ events is so large it does not fit into single 
register. Thus, the commit message is somewhat misleading, please fix.

> Hence making it part of omap_prcm_irq_setup structure so that case of
> single set of IRQ* registers can be handled generically.
>
> Signed-off-by: Keerthy <j-keerthy@ti.com>
> ---
>   arch/arm/mach-omap2/prcm-common.h |  8 ++++----
>   arch/arm/mach-omap2/prm3xxx.c     | 20 +++++++++---------
>   arch/arm/mach-omap2/prm44xx.c     | 43 +++++++++++++++++++++------------------
>   arch/arm/mach-omap2/prm_common.c  |  5 ++---
>   4 files changed, 39 insertions(+), 37 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/prcm-common.h b/arch/arm/mach-omap2/prcm-common.h
> index 2e60406..99447e7 100644
> --- a/arch/arm/mach-omap2/prcm-common.h
> +++ b/arch/arm/mach-omap2/prcm-common.h
> @@ -470,8 +470,8 @@ struct omap_prcm_irq {
>
>   /**
>    * struct omap_prcm_irq_setup - PRCM interrupt controller details
> - * @ack: PRM register offset for the first PRM_IRQSTATUS_MPU register
> - * @mask: PRM register offset for the first PRM_IRQENABLE_MPU register
> + * @ack: PRM register offsets for the PRM_IRQSTATUS_MPU registers
> + * @mask: PRM register offsets for the PRM_IRQENABLE_MPU registers
>    * @nr_regs: number of PRM_IRQ{STATUS,ENABLE}_MPU* registers
>    * @nr_irqs: number of entries in the @irqs array
>    * @irqs: ptr to an array of PRCM interrupt bits (see @nr_irqs)
> @@ -492,8 +492,8 @@ struct omap_prcm_irq {
>    * specified in static initializers.
>    */
>   struct omap_prcm_irq_setup {
> -	u16 ack;
> -	u16 mask;
> +	u16 ack[2];
> +	u16 mask[2];

You don't really need two pairs of offsets; in generic case, if we have 
two IRQ registers, the offset between the two is 4, as used elsewhere in 
the code. By keeping the previous struct layout, you can save a few 
bytes of memory, and don't need to touch the omap3 code all over the 
place either.

>   	u16 pm_ctrl;
>   	u8 nr_regs;
>   	u8 nr_irqs;
> diff --git a/arch/arm/mach-omap2/prm3xxx.c b/arch/arm/mach-omap2/prm3xxx.c
> index 62680aa..56649b0 100644
> --- a/arch/arm/mach-omap2/prm3xxx.c
> +++ b/arch/arm/mach-omap2/prm3xxx.c

<snip>

No need to touch the OMAP3 code, as the offsets are always the default ones.

> diff --git a/arch/arm/mach-omap2/prm44xx.c b/arch/arm/mach-omap2/prm44xx.c
> index 8149e5a..20b547a 100644
> --- a/arch/arm/mach-omap2/prm44xx.c
> +++ b/arch/arm/mach-omap2/prm44xx.c
> @@ -43,8 +43,10 @@ static const struct omap_prcm_irq omap4_prcm_irqs[] = {
>   };
>
>   static struct omap_prcm_irq_setup omap4_prcm_irq_setup = {
> -	.ack			= OMAP4_PRM_IRQSTATUS_MPU_OFFSET,
> -	.mask			= OMAP4_PRM_IRQENABLE_MPU_OFFSET,
> +	.ack[0]			= OMAP4_PRM_IRQSTATUS_MPU_OFFSET,
> +	.mask[0]		= OMAP4_PRM_IRQENABLE_MPU_OFFSET,
> +	.ack[1]			= OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET,
> +	.mask[1]		= OMAP4_PRM_IRQENABLE_MPU_2_OFFSET,

I think you should just keep the single IRQENABLE / IRQSTATUS 
definitions in place, and use +4 addressing where applicable. Having an 
array of the ack + mask definitions is kind of ugly.

>   	.pm_ctrl		= OMAP4_PRM_IO_PMCTRL_OFFSET,
>   	.nr_regs		= 2,
>   	.irqs			= omap4_prcm_irqs,
> @@ -217,11 +219,11 @@ static inline u32 _read_pending_irq_reg(u16 irqen_offs, u16 irqst_offs)
>    */
>   static void omap44xx_prm_read_pending_irqs(unsigned long *events)
>   {
> -	events[0] = _read_pending_irq_reg(OMAP4_PRM_IRQENABLE_MPU_OFFSET,
> -					  OMAP4_PRM_IRQSTATUS_MPU_OFFSET);
> +	int i;
>
> -	events[1] = _read_pending_irq_reg(OMAP4_PRM_IRQENABLE_MPU_2_OFFSET,
> -					  OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET);
> +	for (i = 0; i < omap4_prcm_irq_setup.nr_regs; i++)
> +		events[i] = _read_pending_irq_reg(omap4_prcm_irq_setup.mask[i],
> +						  omap4_prcm_irq_setup.ack[i]);

... change to mask + i * 4 / ack + i * 4.

>   }
>
>   /**
> @@ -251,17 +253,16 @@ static void omap44xx_prm_ocp_barrier(void)
>    */
>   static void omap44xx_prm_save_and_clear_irqen(u32 *saved_mask)
>   {
> -	saved_mask[0] =
> -		omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
> -					OMAP4_PRM_IRQENABLE_MPU_OFFSET);
> -	saved_mask[1] =
> -		omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
> -					OMAP4_PRM_IRQENABLE_MPU_2_OFFSET);
> +	int i;
>
> -	omap4_prm_write_inst_reg(0, OMAP4430_PRM_OCP_SOCKET_INST,
> -				 OMAP4_PRM_IRQENABLE_MPU_OFFSET);
> -	omap4_prm_write_inst_reg(0, OMAP4430_PRM_OCP_SOCKET_INST,
> -				 OMAP4_PRM_IRQENABLE_MPU_2_OFFSET);
> +	for (i = 0; i < omap4_prcm_irq_setup.nr_regs; i++) {
> +		saved_mask[i] =
> +			omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
> +						omap4_prcm_irq_setup.mask[i]);
> +
> +		omap4_prm_write_inst_reg(0, OMAP4430_PRM_OCP_SOCKET_INST,
> +					 omap4_prcm_irq_setup.mask[i]);

ditto.

> +	}
>
>   	/* OCP barrier */
>   	omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
> @@ -280,10 +281,12 @@ static void omap44xx_prm_save_and_clear_irqen(u32 *saved_mask)
>    */
>   static void omap44xx_prm_restore_irqen(u32 *saved_mask)
>   {
> -	omap4_prm_write_inst_reg(saved_mask[0], OMAP4430_PRM_OCP_SOCKET_INST,
> -				 OMAP4_PRM_IRQENABLE_MPU_OFFSET);
> -	omap4_prm_write_inst_reg(saved_mask[1], OMAP4430_PRM_OCP_SOCKET_INST,
> -				 OMAP4_PRM_IRQENABLE_MPU_2_OFFSET);
> +	int i;
> +
> +	for (i = 0; i < omap4_prcm_irq_setup.nr_regs; i++)
> +		omap4_prm_write_inst_reg(saved_mask[i],
> +					 OMAP4430_PRM_OCP_SOCKET_INST,
> +					 omap4_prcm_irq_setup.mask[i]);

...and here.

>   }
>
>   /**
> diff --git a/arch/arm/mach-omap2/prm_common.c b/arch/arm/mach-omap2/prm_common.c
> index 7add799..10ef0da 100644
> --- a/arch/arm/mach-omap2/prm_common.c
> +++ b/arch/arm/mach-omap2/prm_common.c
> @@ -281,7 +281,6 @@ int omap_prcm_register_chain_handler(struct omap_prcm_irq_setup *irq_setup)
>   		pr_err("PRCM: already initialized; won't reinitialize\n");
>   		return -EINVAL;
>   	}
> -

This change is against the coding style.

>   	if (nr_regs > OMAP_PRCM_MAX_NR_PENDING_REG) {
>   		pr_err("PRCM: nr_regs too large\n");
>   		return -EINVAL;
> @@ -339,8 +338,8 @@ int omap_prcm_register_chain_handler(struct omap_prcm_irq_setup *irq_setup)
>   		ct->chip.irq_mask = irq_gc_mask_clr_bit;
>   		ct->chip.irq_unmask = irq_gc_mask_set_bit;
>
> -		ct->regs.ack = irq_setup->ack + i * 4;
> -		ct->regs.mask = irq_setup->mask + i * 4;
> +		ct->regs.ack = irq_setup->ack[i];
> +		ct->regs.mask = irq_setup->mask[i];

... and you can drop this change.

>
>   		irq_setup_generic_chip(gc, mask[i], 0, IRQ_NOREQUEST, 0);
>   		prcm_irq_chips[i] = gc;
>

Re: [PATCH 2/6] ARM: AM43xx: Add the PRM IRQ register offsets

[Tero Kristo]

On 06/22/2015 09:22 AM, Keerthy wrote:
> Add the PRM IRQ register offsets.

This patch doesn't apply cleanly to 4.2-rc1.

-Tero

>
> Signed-off-by: Keerthy <j-keerthy@ti.com>
> ---
>   arch/arm/mach-omap2/prcm43xx.h | 5 +++++
>   1 file changed, 5 insertions(+)
>
> diff --git a/arch/arm/mach-omap2/prcm43xx.h b/arch/arm/mach-omap2/prcm43xx.h
> index d026199..ec1ac5c 100644
> --- a/arch/arm/mach-omap2/prcm43xx.h
> +++ b/arch/arm/mach-omap2/prcm43xx.h
> @@ -25,6 +25,10 @@
>   #define AM43XX_PRM_WKUP_INST				0x2000
>   #define AM43XX_PRM_DEVICE_INST				0x4000
>
> +/* PRM_IRQ offsets */
> +#define AM43XX_PRM_IRQSTATUS_MPU_OFFSET			0x0004
> +#define AM43XX_PRM_IRQENABLE_MPU_OFFSET			0x0008
> +
>   /* RM RSTCTRL offsets */
>   #define AM43XX_RM_PER_RSTCTRL_OFFSET			0x0010
>   #define AM43XX_RM_GFX_RSTCTRL_OFFSET			0x0010
> @@ -146,4 +150,5 @@
>   #define AM43XX_CM_PER_HDQ1W_CLKCTRL_OFFSET		0x04a0
>   #define AM43XX_CM_PER_VPFE0_CLKCTRL_OFFSET		0x0068
>   #define AM43XX_CM_PER_VPFE1_CLKCTRL_OFFSET		0x0070
> +#define AM43XX_PRM_IO_PMCTRL_OFFSET			0x0024
>   #endif
>

Re: [PATCH 4/6] ARM: OMAP: PRM: Remove hardcoding of IRQENABLE_MPU_2 and IRQSTATUS_MPU_2 register offsets

[Keerthy]

On Tuesday 07 July 2015 05:21 PM, Tero Kristo wrote:
> On 06/22/2015 09:22 AM, Keerthy wrote:
>> The register offsets of IRQENABLE_MPU_2 and IRQSTATUS_MPU_2 are
>> hardcoded.
>> This makes it difficult to reuse the code for single core SoCs like
>> AM437x.
>
> Single core vs. having two sets of IRQENABLE / IRQSTATUS registers do
> not have any relation to each other. OMAP4+ has two IRQ registers,
> because the number of IRQ events is so large it does not fit into single
> register. Thus, the commit message is somewhat misleading, please fix.

Okay i will make it clearer.

>
>> Hence making it part of omap_prcm_irq_setup structure so that case of
>> single set of IRQ* registers can be handled generically.
>>
>> Signed-off-by: Keerthy <j-keerthy@ti.com>
>> ---
>>   arch/arm/mach-omap2/prcm-common.h |  8 ++++----
>>   arch/arm/mach-omap2/prm3xxx.c     | 20 +++++++++---------
>>   arch/arm/mach-omap2/prm44xx.c     | 43
>> +++++++++++++++++++++------------------
>>   arch/arm/mach-omap2/prm_common.c  |  5 ++---
>>   4 files changed, 39 insertions(+), 37 deletions(-)
>>
>> diff --git a/arch/arm/mach-omap2/prcm-common.h
>> b/arch/arm/mach-omap2/prcm-common.h
>> index 2e60406..99447e7 100644
>> --- a/arch/arm/mach-omap2/prcm-common.h
>> +++ b/arch/arm/mach-omap2/prcm-common.h
>> @@ -470,8 +470,8 @@ struct omap_prcm_irq {
>>
>>   /**
>>    * struct omap_prcm_irq_setup - PRCM interrupt controller details
>> - * @ack: PRM register offset for the first PRM_IRQSTATUS_MPU register
>> - * @mask: PRM register offset for the first PRM_IRQENABLE_MPU register
>> + * @ack: PRM register offsets for the PRM_IRQSTATUS_MPU registers
>> + * @mask: PRM register offsets for the PRM_IRQENABLE_MPU registers
>>    * @nr_regs: number of PRM_IRQ{STATUS,ENABLE}_MPU* registers
>>    * @nr_irqs: number of entries in the @irqs array
>>    * @irqs: ptr to an array of PRCM interrupt bits (see @nr_irqs)
>> @@ -492,8 +492,8 @@ struct omap_prcm_irq {
>>    * specified in static initializers.
>>    */
>>   struct omap_prcm_irq_setup {
>> -    u16 ack;
>> -    u16 mask;
>> +    u16 ack[2];
>> +    u16 mask[2];
>
> You don't really need two pairs of offsets; in generic case, if we have
> two IRQ registers, the offset between the two is 4, as used elsewhere in
> the code. By keeping the previous struct layout, you can save a few
> bytes of memory, and don't need to touch the omap3 code all over the
> place either.

Okay

>
>>       u16 pm_ctrl;
>>       u8 nr_regs;
>>       u8 nr_irqs;
>> diff --git a/arch/arm/mach-omap2/prm3xxx.c
>> b/arch/arm/mach-omap2/prm3xxx.c
>> index 62680aa..56649b0 100644
>> --- a/arch/arm/mach-omap2/prm3xxx.c
>> +++ b/arch/arm/mach-omap2/prm3xxx.c
>
> <snip>
>
> No need to touch the OMAP3 code, as the offsets are always the default
> ones.
>
>> diff --git a/arch/arm/mach-omap2/prm44xx.c
>> b/arch/arm/mach-omap2/prm44xx.c
>> index 8149e5a..20b547a 100644
>> --- a/arch/arm/mach-omap2/prm44xx.c
>> +++ b/arch/arm/mach-omap2/prm44xx.c
>> @@ -43,8 +43,10 @@ static const struct omap_prcm_irq omap4_prcm_irqs[]
>> = {
>>   };
>>
>>   static struct omap_prcm_irq_setup omap4_prcm_irq_setup = {
>> -    .ack            = OMAP4_PRM_IRQSTATUS_MPU_OFFSET,
>> -    .mask            = OMAP4_PRM_IRQENABLE_MPU_OFFSET,
>> +    .ack[0]            = OMAP4_PRM_IRQSTATUS_MPU_OFFSET,
>> +    .mask[0]        = OMAP4_PRM_IRQENABLE_MPU_OFFSET,
>> +    .ack[1]            = OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET,
>> +    .mask[1]        = OMAP4_PRM_IRQENABLE_MPU_2_OFFSET,
>
> I think you should just keep the single IRQENABLE / IRQSTATUS
> definitions in place, and use +4 addressing where applicable. Having an
> array of the ack + mask definitions is kind of ugly.

Okay.

>
>>       .pm_ctrl        = OMAP4_PRM_IO_PMCTRL_OFFSET,
>>       .nr_regs        = 2,
>>       .irqs            = omap4_prcm_irqs,
>> @@ -217,11 +219,11 @@ static inline u32 _read_pending_irq_reg(u16
>> irqen_offs, u16 irqst_offs)
>>    */
>>   static void omap44xx_prm_read_pending_irqs(unsigned long *events)
>>   {
>> -    events[0] = _read_pending_irq_reg(OMAP4_PRM_IRQENABLE_MPU_OFFSET,
>> -                      OMAP4_PRM_IRQSTATUS_MPU_OFFSET);
>> +    int i;
>>
>> -    events[1] = _read_pending_irq_reg(OMAP4_PRM_IRQENABLE_MPU_2_OFFSET,
>> -                      OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET);
>> +    for (i = 0; i < omap4_prcm_irq_setup.nr_regs; i++)
>> +        events[i] = _read_pending_irq_reg(omap4_prcm_irq_setup.mask[i],
>> +                          omap4_prcm_irq_setup.ack[i]);
>
> ... change to mask + i * 4 / ack + i * 4.

got it.

>
>>   }
>>
>>   /**
>> @@ -251,17 +253,16 @@ static void omap44xx_prm_ocp_barrier(void)
>>    */
>>   static void omap44xx_prm_save_and_clear_irqen(u32 *saved_mask)
>>   {
>> -    saved_mask[0] =
>> -        omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
>> -                    OMAP4_PRM_IRQENABLE_MPU_OFFSET);
>> -    saved_mask[1] =
>> -        omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
>> -                    OMAP4_PRM_IRQENABLE_MPU_2_OFFSET);
>> +    int i;
>>
>> -    omap4_prm_write_inst_reg(0, OMAP4430_PRM_OCP_SOCKET_INST,
>> -                 OMAP4_PRM_IRQENABLE_MPU_OFFSET);
>> -    omap4_prm_write_inst_reg(0, OMAP4430_PRM_OCP_SOCKET_INST,
>> -                 OMAP4_PRM_IRQENABLE_MPU_2_OFFSET);
>> +    for (i = 0; i < omap4_prcm_irq_setup.nr_regs; i++) {
>> +        saved_mask[i] =
>> +            omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
>> +                        omap4_prcm_irq_setup.mask[i]);
>> +
>> +        omap4_prm_write_inst_reg(0, OMAP4430_PRM_OCP_SOCKET_INST,
>> +                     omap4_prcm_irq_setup.mask[i]);
>
> ditto.
>
>> +    }
>>
>>       /* OCP barrier */
>>       omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
>> @@ -280,10 +281,12 @@ static void
>> omap44xx_prm_save_and_clear_irqen(u32 *saved_mask)
>>    */
>>   static void omap44xx_prm_restore_irqen(u32 *saved_mask)
>>   {
>> -    omap4_prm_write_inst_reg(saved_mask[0],
>> OMAP4430_PRM_OCP_SOCKET_INST,
>> -                 OMAP4_PRM_IRQENABLE_MPU_OFFSET);
>> -    omap4_prm_write_inst_reg(saved_mask[1],
>> OMAP4430_PRM_OCP_SOCKET_INST,
>> -                 OMAP4_PRM_IRQENABLE_MPU_2_OFFSET);
>> +    int i;
>> +
>> +    for (i = 0; i < omap4_prcm_irq_setup.nr_regs; i++)
>> +        omap4_prm_write_inst_reg(saved_mask[i],
>> +                     OMAP4430_PRM_OCP_SOCKET_INST,
>> +                     omap4_prcm_irq_setup.mask[i]);
>
> ...and here.
>
>>   }
>>
>>   /**
>> diff --git a/arch/arm/mach-omap2/prm_common.c
>> b/arch/arm/mach-omap2/prm_common.c
>> index 7add799..10ef0da 100644
>> --- a/arch/arm/mach-omap2/prm_common.c
>> +++ b/arch/arm/mach-omap2/prm_common.c
>> @@ -281,7 +281,6 @@ int omap_prcm_register_chain_handler(struct
>> omap_prcm_irq_setup *irq_setup)
>>           pr_err("PRCM: already initialized; won't reinitialize\n");
>>           return -EINVAL;
>>       }
>> -
>
> This change is against the coding style.
>

I will fix this. Thanks for catching this.

>>       if (nr_regs > OMAP_PRCM_MAX_NR_PENDING_REG) {
>>           pr_err("PRCM: nr_regs too large\n");
>>           return -EINVAL;
>> @@ -339,8 +338,8 @@ int omap_prcm_register_chain_handler(struct
>> omap_prcm_irq_setup *irq_setup)
>>           ct->chip.irq_mask = irq_gc_mask_clr_bit;
>>           ct->chip.irq_unmask = irq_gc_mask_set_bit;
>>
>> -        ct->regs.ack = irq_setup->ack + i * 4;
>> -        ct->regs.mask = irq_setup->mask + i * 4;
>> +        ct->regs.ack = irq_setup->ack[i];
>> +        ct->regs.mask = irq_setup->mask[i];
>
> ... and you can drop this change.
>
>>
>>           irq_setup_generic_chip(gc, mask[i], 0, IRQ_NOREQUEST, 0);
>>           prcm_irq_chips[i] = gc;
>>
>