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Subject[PATCH 06/16] soc: imx: gpcv2: add runtime PM support for power-domains
Date
From: Lucas Stach <l.stach@pengutronix.de>

This allows to nest domains into other power domains and have the
parent domain powered up/down as required by the child domains.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
---
drivers/soc/imx/gpcv2.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c
index d27025e37a9e..87165619a689 100644
--- a/drivers/soc/imx/gpcv2.c
+++ b/drivers/soc/imx/gpcv2.c
@@ -12,6 +12,7 @@
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
+#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/sizes.h>
@@ -141,11 +142,17 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd)
u32 reg_val;
int ret;

+ ret = pm_runtime_get_sync(domain->dev);
+ if (ret) {
+ pm_runtime_put_noidle(domain->dev);
+ return ret;
+ }
+
if (!IS_ERR(domain->regulator)) {
ret = regulator_enable(domain->regulator);
if (ret) {
dev_err(domain->dev, "failed to enable regulator\n");
- return ret;
+ goto out_put_pm;
}
}

@@ -200,6 +207,8 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd)
out_regulator_disable:
if (!IS_ERR(domain->regulator))
regulator_disable(domain->regulator);
+out_put_pm:
+ pm_runtime_put(domain->dev);

return ret;
}
@@ -262,6 +271,8 @@ static int imx_pgc_power_down(struct generic_pm_domain *genpd)
}
}

+ pm_runtime_put(domain->dev);
+
return 0;

out_clk_disable:
@@ -519,6 +530,8 @@ static int imx_pgc_domain_probe(struct platform_device *pdev)
return dev_err_probe(domain->dev, domain->num_clks,
"Failed to get domain's clocks\n");

+ pm_runtime_enable(domain->dev);
+
regmap_update_bits(domain->regmap, GPC_PGC_CPU_MAPPING,
domain->bits.map, domain->bits.map);

@@ -542,6 +555,7 @@ static int imx_pgc_domain_probe(struct platform_device *pdev)
out_domain_unmap:
regmap_update_bits(domain->regmap, GPC_PGC_CPU_MAPPING,
domain->bits.map, 0);
+ pm_runtime_disable(domain->dev);

return ret;
}
@@ -556,6 +570,8 @@ static int imx_pgc_domain_remove(struct platform_device *pdev)
regmap_update_bits(domain->regmap, GPC_PGC_CPU_MAPPING,
domain->bits.map, 0);

+ pm_runtime_disable(domain->dev);
+
return 0;
}

--
2.30.0
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