[PATCH v2 3/5] soc: rockchip: power-domain: Use of_clk_get_parent_count() instead of open coding

Geert Uytterhoeven
2018-04-10T12:51:39Z

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>
---
This depends on "[PATCH v2 1/5] clk: Extract OF clock helpers in
<linux/of_clk.h>".

v2:
- of_clk_get_parent_count() was moved to <linux/of_clk.h>.
---
drivers/soc/rockchip/pm_domains.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/soc/rockchip/pm_domains.c b/drivers/soc/rockchip/pm_domains.c
index 53efc386b1ada8cf..13913d40c8213e36 100644
--- a/drivers/soc/rockchip/pm_domains.c
+++ b/drivers/soc/rockchip/pm_domains.c
@@ -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);
--
2.7.4