pmdomain: renesas: rcar-sysc: Cleanups and R-Car M3-W quirk handling

index 35d9aa0dfab867fc..a60ce08e7d3b09cb 100644
@@ -56,17 +56,20 @@
 
 #define RCAR_PD_ALWAYS_ON	32	/* Always-on power area */
 
-struct rcar_sysc_ch {
+struct rcar_sysc_pd {
+	struct generic_pm_domain genpd;
 	u16 chan_offs;
 	u8 chan_bit;
 	u8 isr_bit;
+	unsigned int flags;
+	char name[];
 };
 
 static void __iomem *rcar_sysc_base;
 static DEFINE_SPINLOCK(rcar_sysc_lock); /* SMP CPUs + I/O devices */
 static u32 rcar_sysc_extmask_offs, rcar_sysc_extmask_val;
 
-static int rcar_sysc_pwr_on_off(const struct rcar_sysc_ch *sysc_ch, bool on)
+static int rcar_sysc_pwr_on_off(const struct rcar_sysc_pd *pd, bool on)
 {
 	unsigned int sr_bit, reg_offs;
 	u32 val;

@@ -88,16 +91,15 @@ static int rcar_sysc_pwr_on_off(const struct rcar_sysc_ch *sysc_ch, bool on)
 		return -EAGAIN;
 
 	/* Submit power shutoff or power resume request */
-	iowrite32(BIT(sysc_ch->chan_bit),
-		  rcar_sysc_base + sysc_ch->chan_offs + reg_offs);
+	iowrite32(BIT(pd->chan_bit), rcar_sysc_base + pd->chan_offs + reg_offs);
 
 	return 0;
 }
 
-static int rcar_sysc_power(const struct rcar_sysc_ch *sysc_ch, bool on)
+static int rcar_sysc_power(const struct rcar_sysc_pd *pd, bool on)
 {
-	unsigned int isr_mask = BIT(sysc_ch->isr_bit);
-	unsigned int chan_mask = BIT(sysc_ch->chan_bit);
+	unsigned int isr_mask = BIT(pd->isr_bit);
+	unsigned int chan_mask = BIT(pd->chan_bit);
 	unsigned int status, k;
 	unsigned long flags;
 	int ret;

@@ -125,12 +127,11 @@ static int rcar_sysc_power(const struct rcar_sysc_ch *sysc_ch, bool on)
 
 	/* Submit power shutoff or resume request until it was accepted */
 	for (k = 0; k < PWRER_RETRIES; k++) {
-		ret = rcar_sysc_pwr_on_off(sysc_ch, on);
+		ret = rcar_sysc_pwr_on_off(pd, on);
 		if (ret)
 			goto out;
 
-		status = ioread32(rcar_sysc_base +
-				  sysc_ch->chan_offs + PWRER_OFFS);
+		status = ioread32(rcar_sysc_base + pd->chan_offs + PWRER_OFFS);
 		if (!(status & chan_mask))
 			break;
 

@@ -158,28 +159,21 @@ static int rcar_sysc_power(const struct rcar_sysc_ch *sysc_ch, bool on)
 	spin_unlock_irqrestore(&rcar_sysc_lock, flags);
 
 	pr_debug("sysc power %s domain %d: %08x -> %d\n", on ? "on" : "off",
-		 sysc_ch->isr_bit, ioread32(rcar_sysc_base + SYSCISR), ret);
+		 pd->isr_bit, ioread32(rcar_sysc_base + SYSCISR), ret);
 	return ret;
 }
 
-static bool rcar_sysc_power_is_off(const struct rcar_sysc_ch *sysc_ch)
+static bool rcar_sysc_power_is_off(const struct rcar_sysc_pd *pd)
 {
 	unsigned int st;
 
-	st = ioread32(rcar_sysc_base + sysc_ch->chan_offs + PWRSR_OFFS);
-	if (st & BIT(sysc_ch->chan_bit))
+	st = ioread32(rcar_sysc_base + pd->chan_offs + PWRSR_OFFS);
+	if (st & BIT(pd->chan_bit))
 		return true;
 
 	return false;
 }
 
-struct rcar_sysc_pd {
-	struct generic_pm_domain genpd;
-	struct rcar_sysc_ch ch;
-	unsigned int flags;
-	char name[];
-};
-
 static inline struct rcar_sysc_pd *to_rcar_pd(struct generic_pm_domain *d)
 {
 	return container_of(d, struct rcar_sysc_pd, genpd);

@@ -190,7 +184,7 @@ static int rcar_sysc_pd_power_off(struct generic_pm_domain *genpd)
 	struct rcar_sysc_pd *pd = to_rcar_pd(genpd);
 
 	pr_debug("%s: %s\n", __func__, genpd->name);
-	return rcar_sysc_power(&pd->ch, false);
+	return rcar_sysc_power(pd, false);
 }
 
 static int rcar_sysc_pd_power_on(struct generic_pm_domain *genpd)

@@ -198,7 +192,7 @@ static int rcar_sysc_pd_power_on(struct generic_pm_domain *genpd)
 	struct rcar_sysc_pd *pd = to_rcar_pd(genpd);
 
 	pr_debug("%s: %s\n", __func__, genpd->name);
-	return rcar_sysc_power(&pd->ch, true);
+	return rcar_sysc_power(pd, true);
 }
 
 static bool has_cpg_mstp;

@@ -252,12 +246,12 @@ static int __init rcar_sysc_pd_setup(struct rcar_sysc_pd *pd)
 		goto finalize;
 	}
 
-	if (!rcar_sysc_power_is_off(&pd->ch)) {
+	if (!rcar_sysc_power_is_off(pd)) {
 		pr_debug("%s: %s is already powered\n", __func__, genpd->name);
 		goto finalize;
 	}
 
-	rcar_sysc_power(&pd->ch, true);
+	rcar_sysc_power(pd, true);
 
 finalize:
 	error = pm_genpd_init(genpd, &simple_qos_governor, false);

@@ -412,9 +406,9 @@ static int __init rcar_sysc_pd_init(void)
 
 		memcpy(pd->name, area->name, n);
 		pd->genpd.name = pd->name;
-		pd->ch.chan_offs = area->chan_offs;
-		pd->ch.chan_bit = area->chan_bit;
-		pd->ch.isr_bit = area->isr_bit;
+		pd->chan_offs = area->chan_offs;
+		pd->chan_bit = area->chan_bit;
+		pd->isr_bit = area->isr_bit;
 		pd->flags = area->flags;
 
 		error = rcar_sysc_pd_setup(pd);

@@ -473,10 +467,10 @@ static int rcar_sysc_power_cpu(unsigned int idx, bool on)
 			continue;
 
 		pd = to_rcar_pd(genpd);
-		if (!(pd->flags & PD_CPU) || pd->ch.chan_bit != idx)
+		if (!(pd->flags & PD_CPU) || pd->chan_bit != idx)
 			continue;
 
-		return rcar_sysc_power(&pd->ch, on);
+		return rcar_sysc_power(pd, on);
 	}
 
 	return -ENOENT;

similarity index 69%
copy from drivers/pmdomain/renesas/r8a7796-sysc.c
copy to drivers/pmdomain/renesas/r8a77960-sysc.c
index 471bd5b3b6ada18d..e6f2c3f961255f40 100644
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Renesas R-Car M3-W/W+ System Controller
+ * Renesas R-Car M3-W System Controller
  *
  * Copyright (C) 2016 Glider bvba
  * Copyright (C) 2018-2019 Renesas Electronics Corporation

@@ -13,7 +13,7 @@
 
 #include "rcar-sysc.h"
 
-static struct rcar_sysc_area r8a7796_areas[] __initdata = {
+static const struct rcar_sysc_area r8a77960_areas[] __initconst = {
 	{ "always-on",	    0, 0, R8A7796_PD_ALWAYS_ON,	-1, PD_ALWAYS_ON },
 	{ "ca57-scu",	0x1c0, 0, R8A7796_PD_CA57_SCU,	R8A7796_PD_ALWAYS_ON,
 	  PD_SCU },

@@ -41,27 +41,7 @@ static struct rcar_sysc_area r8a7796_areas[] __initdata = {
 };
 
 
-#ifdef CONFIG_SYSC_R8A77960
 const struct rcar_sysc_info r8a77960_sysc_info __initconst = {
-	.areas = r8a7796_areas,
-	.num_areas = ARRAY_SIZE(r8a7796_areas),
+	.areas = r8a77960_areas,
+	.num_areas = ARRAY_SIZE(r8a77960_areas),
 };
-#endif /* CONFIG_SYSC_R8A77960 */
-
-#ifdef CONFIG_SYSC_R8A77961
-static int __init r8a77961_sysc_init(void)
-{
-	rcar_sysc_nullify(r8a7796_areas, ARRAY_SIZE(r8a7796_areas),
-			  R8A7796_PD_A2VC0);
-
-	return 0;
-}
-
-const struct rcar_sysc_info r8a77961_sysc_info __initconst = {
-	.init = r8a77961_sysc_init,
-	.areas = r8a7796_areas,
-	.num_areas = ARRAY_SIZE(r8a7796_areas),
-	.extmask_offs = 0x2f8,
-	.extmask_val = BIT(0),
-};
-#endif /* CONFIG_SYSC_R8A77961 */

similarity index 69%
rename from drivers/pmdomain/renesas/r8a7796-sysc.c
rename to drivers/pmdomain/renesas/r8a77961-sysc.c
index 471bd5b3b6ada18d..a1155068ee7a60b8 100644
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Renesas R-Car M3-W/W+ System Controller
+ * Renesas R-Car M3-W+ System Controller
  *
  * Copyright (C) 2016 Glider bvba
  * Copyright (C) 2018-2019 Renesas Electronics Corporation

@@ -13,7 +13,7 @@
 
 #include "rcar-sysc.h"
 
-static struct rcar_sysc_area r8a7796_areas[] __initdata = {
+static const struct rcar_sysc_area r8a77961_areas[] __initconst = {
 	{ "always-on",	    0, 0, R8A7796_PD_ALWAYS_ON,	-1, PD_ALWAYS_ON },
 	{ "ca57-scu",	0x1c0, 0, R8A7796_PD_CA57_SCU,	R8A7796_PD_ALWAYS_ON,
 	  PD_SCU },

@@ -33,35 +33,15 @@ static struct rcar_sysc_area r8a7796_areas[] __initdata = {
 	  PD_CPU_NOCR },
 	{ "cr7",	0x240, 0, R8A7796_PD_CR7,	R8A7796_PD_ALWAYS_ON },
 	{ "a3vc",	0x380, 0, R8A7796_PD_A3VC,	R8A7796_PD_ALWAYS_ON },
-	{ "a2vc0",	0x3c0, 0, R8A7796_PD_A2VC0,	R8A7796_PD_A3VC },
 	{ "a2vc1",	0x3c0, 1, R8A7796_PD_A2VC1,	R8A7796_PD_A3VC },
 	{ "3dg-a",	0x100, 0, R8A7796_PD_3DG_A,	R8A7796_PD_ALWAYS_ON },
 	{ "3dg-b",	0x100, 1, R8A7796_PD_3DG_B,	R8A7796_PD_3DG_A },
 	{ "a3ir",	0x180, 0, R8A7796_PD_A3IR,	R8A7796_PD_ALWAYS_ON },
 };
 
-
-#ifdef CONFIG_SYSC_R8A77960
-const struct rcar_sysc_info r8a77960_sysc_info __initconst = {
-	.areas = r8a7796_areas,
-	.num_areas = ARRAY_SIZE(r8a7796_areas),
-};
-#endif /* CONFIG_SYSC_R8A77960 */
-
-#ifdef CONFIG_SYSC_R8A77961
-static int __init r8a77961_sysc_init(void)
-{
-	rcar_sysc_nullify(r8a7796_areas, ARRAY_SIZE(r8a7796_areas),
-			  R8A7796_PD_A2VC0);
-
-	return 0;
-}
-
 const struct rcar_sysc_info r8a77961_sysc_info __initconst = {
-	.init = r8a77961_sysc_init,
-	.areas = r8a7796_areas,
-	.num_areas = ARRAY_SIZE(r8a7796_areas),
+	.areas = r8a77961_areas,
+	.num_areas = ARRAY_SIZE(r8a77961_areas),
 	.extmask_offs = 0x2f8,
 	.extmask_val = BIT(0),
 };
-#endif /* CONFIG_SYSC_R8A77961 */

index a60ce08e7d3b09cb..a9d92e38fcee902c 100644
@@ -439,18 +439,6 @@ static int __init rcar_sysc_pd_init(void)
 }
 early_initcall(rcar_sysc_pd_init);
 
-void __init rcar_sysc_nullify(struct rcar_sysc_area *areas,
-			      unsigned int num_areas, u8 id)
-{
-	unsigned int i;
-
-	for (i = 0; i < num_areas; i++)
-		if (areas[i].isr_bit == id) {
-			areas[i].name = NULL;
-			return;
-		}
-}
-
 #ifdef CONFIG_ARCH_R8A7779
 static int rcar_sysc_power_cpu(unsigned int idx, bool on)
 {

index 266c599a0a9b9198..8c4ec36ed7da2f9d 100644
@@ -71,12 +71,4 @@ extern const struct rcar_sysc_info r8a77980_sysc_info;
 extern const struct rcar_sysc_info r8a77990_sysc_info;
 extern const struct rcar_sysc_info r8a77995_sysc_info;
 
-
-    /*
-     * Helpers for fixing up power area tables depending on SoC revision
-     */
-
-extern void rcar_sysc_nullify(struct rcar_sysc_area *areas,
-			      unsigned int num_areas, u8 id);
-
 #endif /* __SOC_RENESAS_RCAR_SYSC_H__ */

index e6f2c3f961255f40..2ab3f565d2b0f889 100644
@@ -32,12 +32,14 @@ static const struct rcar_sysc_area r8a77960_areas[] __initconst = {
 	{ "ca53-cpu3",	0x200, 3, R8A7796_PD_CA53_CPU3,	R8A7796_PD_CA53_SCU,
 	  PD_CPU_NOCR },
 	{ "cr7",	0x240, 0, R8A7796_PD_CR7,	R8A7796_PD_ALWAYS_ON },
-	{ "a3vc",	0x380, 0, R8A7796_PD_A3VC,	R8A7796_PD_ALWAYS_ON },
+	{ "a3vc",	0x380, 0, R8A7796_PD_A3VC,	R8A7796_PD_ALWAYS_ON,
+	  PD_OFF_DELAY },
 	{ "a2vc0",	0x3c0, 0, R8A7796_PD_A2VC0,	R8A7796_PD_A3VC },
 	{ "a2vc1",	0x3c0, 1, R8A7796_PD_A2VC1,	R8A7796_PD_A3VC },
 	{ "3dg-a",	0x100, 0, R8A7796_PD_3DG_A,	R8A7796_PD_ALWAYS_ON },
 	{ "3dg-b",	0x100, 1, R8A7796_PD_3DG_B,	R8A7796_PD_3DG_A },
-	{ "a3ir",	0x180, 0, R8A7796_PD_A3IR,	R8A7796_PD_ALWAYS_ON },
+	{ "a3ir",	0x180, 0, R8A7796_PD_A3IR,	R8A7796_PD_ALWAYS_ON,
+	  PD_OFF_DELAY },
 };
 
 

index a9d92e38fcee902c..b99326917330f5f1 100644
@@ -90,6 +90,10 @@ static int rcar_sysc_pwr_on_off(const struct rcar_sysc_pd *pd, bool on)
 	if (ret)
 		return -EAGAIN;
 
+	/* Power-off delay quirk */
+	if (!on && (pd->flags & PD_OFF_DELAY))
+		udelay(1);
+
 	/* Submit power shutoff or power resume request */
 	iowrite32(BIT(pd->chan_bit), rcar_sysc_base + pd->chan_offs + reg_offs);
 

index 8c4ec36ed7da2f9d..07ffce310686b2ce 100644
@@ -16,6 +16,7 @@
 #define PD_CPU		BIT(0)	/* Area contains main CPU core */
 #define PD_SCU		BIT(1)	/* Area contains SCU and L2 cache */
 #define PD_NO_CR	BIT(2)	/* Area lacks PWR{ON,OFF}CR registers */
+#define PD_OFF_DELAY	BIT(3)	/* Area is subject to power-off delay quirk */
 
 #define PD_CPU_CR	PD_CPU		  /* CPU area has CR (R-Car H1) */
 #define PD_CPU_NOCR	PD_CPU | PD_NO_CR /* CPU area lacks CR (R-Car Gen2/3) */