clk: renesas: rzg2l-cpg: Use GENPD_FLAG_* flags instead of local ones

For watchdog PM domain it is necessary to provide GENPD_FLAG_IRQ_SAFE flag
to be able to power on the watchdog PM domain from atomic context. For
this, adjust the current infrastructure to be able to provide GENPD_FLAG_*
for individual PM domains.

With this, remove the always_on flag from rzg2l_cpg_add_pm_domains() as
it is not necessary anymore.

Signed-off-by: Claudiu Beznea <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Reviewed-by: Ulf Hansson <[email protected]>
Link: https://lore.kernel.org/[email protected]
Signed-off-by: Geert Uytterhoeven <[email protected]>

Author: claudiubeznea

drivers/clk/renesas/r9a08g045-cpg.c

@@ -9,6 +9,7 @@
 #include <linux/device.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
+#include <linux/pm_domain.h>
 
 #include <dt-bindings/clock/r9a08g045-cpg.h>
 
@@ -266,61 +267,47 @@ static const struct rzg2l_cpg_pm_domain_init_data r9a08g045_pm_domains[] = {
 	/* Keep always-on domain on the first position for proper domains registration. */
 	DEF_PD("always-on",	R9A08G045_PD_ALWAYS_ON,
 				DEF_REG_CONF(0, 0),
-				RZG2L_PD_F_ALWAYS_ON),
+				GENPD_FLAG_ALWAYS_ON),
 	DEF_PD("gic",		R9A08G045_PD_GIC,
 				DEF_REG_CONF(CPG_BUS_ACPU_MSTOP, BIT(3)),
-				RZG2L_PD_F_ALWAYS_ON),
+				GENPD_FLAG_ALWAYS_ON),
 	DEF_PD("ia55",		R9A08G045_PD_IA55,
 				DEF_REG_CONF(CPG_BUS_PERI_CPU_MSTOP, BIT(13)),
-				RZG2L_PD_F_ALWAYS_ON),
+				GENPD_FLAG_ALWAYS_ON),
 	DEF_PD("dmac",		R9A08G045_PD_DMAC,
 				DEF_REG_CONF(CPG_BUS_REG1_MSTOP, GENMASK(3, 0)),
-				RZG2L_PD_F_ALWAYS_ON),
+				GENPD_FLAG_ALWAYS_ON),
 	DEF_PD("wdt0",		R9A08G045_PD_WDT0,
-				DEF_REG_CONF(CPG_BUS_REG0_MSTOP, BIT(0)),
-				RZG2L_PD_F_NONE),
+				DEF_REG_CONF(CPG_BUS_REG0_MSTOP, BIT(0)), 0),
 	DEF_PD("sdhi0",		R9A08G045_PD_SDHI0,
-				DEF_REG_CONF(CPG_BUS_PERI_COM_MSTOP, BIT(0)),
-				RZG2L_PD_F_NONE),
+				DEF_REG_CONF(CPG_BUS_PERI_COM_MSTOP, BIT(0)), 0),
 	DEF_PD("sdhi1",		R9A08G045_PD_SDHI1,
-				DEF_REG_CONF(CPG_BUS_PERI_COM_MSTOP, BIT(1)),
-				RZG2L_PD_F_NONE),
+				DEF_REG_CONF(CPG_BUS_PERI_COM_MSTOP, BIT(1)), 0),
 	DEF_PD("sdhi2",		R9A08G045_PD_SDHI2,
-				DEF_REG_CONF(CPG_BUS_PERI_COM_MSTOP, BIT(11)),
-				RZG2L_PD_F_NONE),
+				DEF_REG_CONF(CPG_BUS_PERI_COM_MSTOP, BIT(11)), 0),
 	DEF_PD("usb0",		R9A08G045_PD_USB0,
-				DEF_REG_CONF(CPG_BUS_PERI_COM_MSTOP, GENMASK(6, 5)),
-				RZG2L_PD_F_NONE),
+				DEF_REG_CONF(CPG_BUS_PERI_COM_MSTOP, GENMASK(6, 5)), 0),
 	DEF_PD("usb1",		R9A08G045_PD_USB1,
-				DEF_REG_CONF(CPG_BUS_PERI_COM_MSTOP, BIT(7)),
-				RZG2L_PD_F_NONE),
+				DEF_REG_CONF(CPG_BUS_PERI_COM_MSTOP, BIT(7)), 0),
 	DEF_PD("usb-phy",	R9A08G045_PD_USB_PHY,
-				DEF_REG_CONF(CPG_BUS_PERI_COM_MSTOP, BIT(4)),
-				RZG2L_PD_F_NONE),
+				DEF_REG_CONF(CPG_BUS_PERI_COM_MSTOP, BIT(4)), 0),
 	DEF_PD("eth0",		R9A08G045_PD_ETHER0,
-				DEF_REG_CONF(CPG_BUS_PERI_COM_MSTOP, BIT(2)),
-				RZG2L_PD_F_NONE),
+				DEF_REG_CONF(CPG_BUS_PERI_COM_MSTOP, BIT(2)), 0),
 	DEF_PD("eth1",		R9A08G045_PD_ETHER1,
-				DEF_REG_CONF(CPG_BUS_PERI_COM_MSTOP, BIT(3)),
-				RZG2L_PD_F_NONE),
+				DEF_REG_CONF(CPG_BUS_PERI_COM_MSTOP, BIT(3)), 0),
 	DEF_PD("i2c0",		R9A08G045_PD_I2C0,
-				DEF_REG_CONF(CPG_BUS_MCPU2_MSTOP, BIT(10)),
-				RZG2L_PD_F_NONE),
+				DEF_REG_CONF(CPG_BUS_MCPU2_MSTOP, BIT(10)), 0),
 	DEF_PD("i2c1",		R9A08G045_PD_I2C1,
-				DEF_REG_CONF(CPG_BUS_MCPU2_MSTOP, BIT(11)),
-				RZG2L_PD_F_NONE),
+				DEF_REG_CONF(CPG_BUS_MCPU2_MSTOP, BIT(11)), 0),
 	DEF_PD("i2c2",		R9A08G045_PD_I2C2,
-				DEF_REG_CONF(CPG_BUS_MCPU2_MSTOP, BIT(12)),
-				RZG2L_PD_F_NONE),
+				DEF_REG_CONF(CPG_BUS_MCPU2_MSTOP, BIT(12)), 0),
 	DEF_PD("i2c3",		R9A08G045_PD_I2C3,
-				DEF_REG_CONF(CPG_BUS_MCPU2_MSTOP, BIT(13)),
-				RZG2L_PD_F_NONE),
+				DEF_REG_CONF(CPG_BUS_MCPU2_MSTOP, BIT(13)), 0),
 	DEF_PD("scif0",		R9A08G045_PD_SCIF0,
-				DEF_REG_CONF(CPG_BUS_MCPU2_MSTOP, BIT(1)),
-				RZG2L_PD_F_NONE),
+				DEF_REG_CONF(CPG_BUS_MCPU2_MSTOP, BIT(1)), 0),
 	DEF_PD("vbat",		R9A08G045_PD_VBAT,
 				DEF_REG_CONF(CPG_BUS_MCPU3_MSTOP, BIT(8)),
-				RZG2L_PD_F_ALWAYS_ON),
+				GENPD_FLAG_ALWAYS_ON),
 };
 
 const struct rzg2l_cpg_info r9a08g045_cpg_info = {

drivers/clk/renesas/rzg2l-cpg.c

@@ -1786,16 +1786,14 @@ static int __init rzg2l_cpg_add_pm_domains(struct rzg2l_cpg_priv *priv)
 		return ret;
 
 	for (unsigned int i = 0; i < info->num_pm_domains; i++) {
-		bool always_on = !!(info->pm_domains[i].flags & RZG2L_PD_F_ALWAYS_ON);
 		struct rzg2l_cpg_pd *pd;
 
 		pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
 		if (!pd)
 			return -ENOMEM;
 
 		pd->genpd.name = info->pm_domains[i].name;
-		if (always_on)
-			pd->genpd.flags = GENPD_FLAG_ALWAYS_ON;
+		pd->genpd.flags = info->pm_domains[i].genpd_flags;
 		pd->conf = info->pm_domains[i].conf;
 		pd->id = info->pm_domains[i].id;
 		pd->priv = priv;

drivers/clk/renesas/rzg2l-cpg.h

@@ -270,14 +270,14 @@ struct rzg2l_cpg_pm_domain_conf {
  * struct rzg2l_cpg_pm_domain_init_data - PM domain init data
  * @name: PM domain name
  * @conf: PM domain configuration
- * @flags: RZG2L PM domain flags (see RZG2L_PD_F_*)
+ * @genpd_flags: genpd flags (see GENPD_FLAG_*)
  * @id: PM domain ID (similar to the ones defined in
  *      include/dt-bindings/clock/<soc-id>-cpg.h)
  */
 struct rzg2l_cpg_pm_domain_init_data {
 	const char * const name;
 	struct rzg2l_cpg_pm_domain_conf conf;
-	u32 flags;
+	u32 genpd_flags;
 	u16 id;
 };
 
@@ -288,13 +288,9 @@ struct rzg2l_cpg_pm_domain_init_data {
 		.conf = { \
 			.mstop = (_mstop_conf), \
 		}, \
-		.flags = (_flags), \
+		.genpd_flags = (_flags), \
 	}
 
-/* Power domain flags. */
-#define RZG2L_PD_F_ALWAYS_ON	BIT(0)
-#define RZG2L_PD_F_NONE		(0)
-
 /**
  * struct rzg2l_cpg_info - SoC-specific CPG Description
  *