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soc: rockchip: power-domain: Use of_clk_get_parent_count() instead of open coding 

As of_clk_get_parent_count() returns zero on failure, while
of_count_phandle_with_args() might return a negative error code, this
also fixes the issue of possibly using a negative number in the
allocation below.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Geert Uytterhoeven 2018-04-18 16:50:03 +02:00 committed by Stephen Boyd
parent b799cac753
commit 54d52ad940
1 changed files with 2 additions and 2 deletions
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4
drivers/soc/rockchip/pm_domains.c
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@ -14,6 +14,7 @@
#include <linux/pm_clock.h>
#include <linux/pm_domain.h>
#include <linux/of_address.h>
#include <linux/of_clk.h>
#include <linux/of_platform.h>
#include <linux/clk.h>
#include <linux/regmap.h>
@ -400,8 +401,7 @@ static int rockchip_pm_add_one_domain(struct rockchip_pmu *pmu,
pd->info = pd_info;
pd->pmu = pmu;
pd->num_clks = of_count_phandle_with_args(node, "clocks",
"#clock-cells");
pd->num_clks = of_clk_get_parent_count(node);
if (pd->num_clks > 0) {
pd->clks = devm_kcalloc(pmu->dev, pd->num_clks,
sizeof(*pd->clks), GFP_KERNEL);