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soc: imx: gpcv2: add runtime PM support for power-domains 

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

Tested-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Lucas Stach 2021-05-10 12:00:38 +08:00 committed by Shawn Guo
parent 58d268619a
commit 1382eb1967
1 changed files with 17 additions and 1 deletions
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18
drivers/soc/imx/gpcv2.c
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@ -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 < 0) {
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;
}
}
@ -204,6 +211,8 @@ out_clk_disable:
out_regulator_disable:
if (!IS_ERR(domain->regulator))
regulator_disable(domain->regulator);
out_put_pm:
pm_runtime_put(domain->dev);
return ret;
}
@ -266,6 +275,8 @@ static int imx_pgc_power_down(struct generic_pm_domain *genpd)
}
}
pm_runtime_put(domain->dev);
return 0;
out_clk_disable:
@ -523,6 +534,8 @@ 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);
@ -546,6 +559,7 @@ out_genpd_remove:
out_domain_unmap:
regmap_update_bits(domain->regmap, GPC_PGC_CPU_MAPPING,
domain->bits.map, 0);
pm_runtime_disable(domain->dev);
return ret;
}
@ -560,6 +574,8 @@ 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;
}