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

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+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>

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 0c80bea..f9dcc98 100644 (file)
--- 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);