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PM / Domains: Remove obsolete "samsung,power-domain" check

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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 46dcf0ff0d ("ARM:
dts: exynos: Remove exynos4415.dtsi").  All other users were converted
before in commit 0da6587041 ("ARM: dts: convert to generic power
domain bindings for exynos DT").

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Geert Uytterhoeven 2017-11-30 12:54:28 +01:00 committed by Rafael J. Wysocki
parent 50c4c4e268
commit 001d50c9a1
1 changed files with 2 additions and 14 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

16
drivers/base/power/domain.c
View file

@ -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);