On Thursday, November 30, 2017 12:54:28 PM CET Geert Uytterhoeven wrote:
> Currently the generic PM Domain code code checks for the presence of
> both (generic) "power-domains" and (Samsung Exynos legacy)
> "samsung,power-domain" properties in all device tree nodes representing
> devices.
>
> There are two issues with this:
> 1. This imposes a small boot-time penalty on all platforms using DT,
> 2. Platform-specific checks do not really belong in core framework
> code.
>
> Remove the platform-specific check, as the last user of
> "samsung,power-domain" was removed in commit 46dcf0ff0de35da8 ("ARM:
> dts: exynos: Remove exynos4415.dtsi"). All other users were converted
> before in commit 0da6587041363033 ("ARM: dts: convert to generic power
> domain bindings for exynos DT").
>
> Signed-off-by: Geert Uytterhoeven <geert+rene...@glider.be>
> ---
> This is v2 of 'PM / Domains: Restrict "samsung,power-domain" checks to
> ARCH_EXYNOS'.
>
> "samsung,power-domain" was only ever used in:
> - arch/arm/boot/dts/exynos4415.dtsi: Removed
> - arch/arm/boot/dts/exynos3250.dtsi: CONFIG_ARCH_EXYNOS3
> - arch/arm/boot/dts/exynos4.dtsi: CONFIG_ARCH_EXYNOS4
> - arch/arm/boot/dts/exynos4x12.dtsi: CONFIG_ARCH_EXYNOS4
> - arch/arm/boot/dts/exynos5250.dtsi: CONFIG_ARCH_EXYNOS5
> - arch/arm/boot/dts/exynos5420.dtsi: CONFIG_ARCH_EXYNOS5
>
> v2:
> - Remove the check completely instead of restricting it to
> ARCH_EXYNOS, as suggested Javier Martinez Canillas one year ago
> ("Removing the support for the deprecated property sound sensible to me",
>
> http://lists.infradead.org/pipermail/linux-arm-kernel/2016-October/462868.html).
> ---
> drivers/base/power/domain.c | 16 ++--------------
> 1 file changed, 2 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
> index 0c80bea05bcb92be..f9dcc981b6b9328c 100644
> --- a/drivers/base/power/domain.c
> +++ b/drivers/base/power/domain.c
> @@ -2199,20 +2199,8 @@ int genpd_dev_pm_attach(struct device *dev)
>
> ret = of_parse_phandle_with_args(dev->of_node, "power-domains",
> "#power-domain-cells", 0, &pd_args);
> - if (ret < 0) {
> - if (ret != -ENOENT)
> - return ret;
> -
> - /*
> - * Try legacy Samsung-specific bindings
> - * (for backwards compatibility of DT ABI)
> - */
> - pd_args.args_count = 0;
> - pd_args.np = of_parse_phandle(dev->of_node,
> - "samsung,power-domain", 0);
> - if (!pd_args.np)
> - return -ENOENT;
> - }
> + if (ret < 0)
> + return ret;
>
> mutex_lock(&gpd_list_lock);
> pd = genpd_get_from_provider(&pd_args);
>
Applied, thanks!
