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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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