Commit 1382eb19 authored by Lucas Stach's avatar Lucas Stach Committed by Shawn Guo
Browse files

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: default avatarFrieder Schrempf <frieder.schrempf@kontron.de>
Reviewed-by: default avatarFrieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: default avatarLucas Stach <l.stach@pengutronix.de>
Signed-off-by: default avatarPeng Fan <peng.fan@nxp.com>
Signed-off-by: default avatarShawn Guo <shawnguo@kernel.org>
parent 58d26861

drivers/soc/imx/gpcv2.c

+17 −1
Original line number Diff line number Diff line
@@ -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 @@ 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;

}
@@ -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 @@ 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;

}
@@ -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;

}