Re: [PATCH v2 8/8] mfd: exynos-lpass: Add runtime PM support

Lee Jones
2017-02-08T10:58:35Z

On Thu, 26 Jan 2017, Marek Szyprowski wrote:

> Convert exisitng lpass-suspend/resume callbacks into runtime PM callbacks.
> This way Exynos LPASS driver will be ready for use with power domains
> enabled. LPASS will be runtime resumed/suspended as a result of its child
> devices runtime PM transitions.
>
> Signed-off-by: Marek Szyprowski <m.szyprowski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
> Acked-by: Krzysztof Kozlowski <krzk-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
> ---
> drivers/mfd/exynos-lpass.c | 14 +++++++++++---
> 1 file changed, 11 insertions(+), 3 deletions(-)

For my own reference:
Acked-for-MFD-by: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>

> diff --git a/drivers/mfd/exynos-lpass.c b/drivers/mfd/exynos-lpass.c
> index 9dbbedad916f..6d735e22acda 100644
> --- a/drivers/mfd/exynos-lpass.c
> +++ b/drivers/mfd/exynos-lpass.c
> @@ -22,6 +22,7 @@
> #include <linux/of.h>
> #include <linux/of_platform.h>
> #include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> #include <linux/regmap.h>
> #include <linux/types.h>
>
> @@ -132,6 +133,8 @@ static int exynos_lpass_probe(struct platform_device *pdev)
> }
>
> platform_set_drvdata(pdev, lpass);
> + pm_runtime_set_active(dev);
> + pm_runtime_enable(dev);
> exynos_lpass_enable(lpass);
>
> return of_platform_populate(dev->of_node, NULL, NULL, dev);
> @@ -141,7 +144,9 @@ static int exynos_lpass_remove(struct platform_device *pdev)
> {
> struct exynos_lpass *lpass = platform_get_drvdata(pdev);
>
> - exynos_lpass_disable(lpass);
> + pm_runtime_disable(&pdev->dev);
> + if (!pm_runtime_status_suspended(&pdev->dev))
> + exynos_lpass_disable(lpass);
> regmap_exit(lpass->top);
>
> return 0;
> @@ -165,8 +170,11 @@ static int __maybe_unused exynos_lpass_resume(struct device *dev)
> return 0;
> }
>
> -static SIMPLE_DEV_PM_OPS(lpass_pm_ops, exynos_lpass_suspend,
> - exynos_lpass_resume);
> +static const struct dev_pm_ops lpass_pm_ops = {
> + SET_RUNTIME_PM_OPS(exynos_lpass_suspend, exynos_lpass_resume, NULL)
> + SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
> + pm_runtime_force_resume)
> +};
>
> static const struct of_device_id exynos_lpass_of_match[] = {
> { .compatible = "samsung,exynos5433-lpass" },

--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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