[PATCH v2 4/5] soc/tegra: pmc: Use of_clk_get_parent_count() instead of open coding

Geert Uytterhoeven
2018-04-10T12:51:40Z

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 very big 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/tegra/pmc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
index d9fcdb592b3966a5..d8cb48a4b8eb1b78 100644
--- a/drivers/soc/tegra/pmc.c
+++ b/drivers/soc/tegra/pmc.c
@@ -31,6 +31,7 @@
#include <linux/iopoll.h>
#include <linux/of.h>
#include <linux/of_address.h>
+#include <linux/of_clk.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
@@ -725,7 +726,7 @@ static int tegra_powergate_of_get_clks(struct tegra_powergate *pg,
unsigned int i, count;
int err;

- count = of_count_phandle_with_args(np, "clocks", "#clock-cells");
+ count = of_clk_get_parent_count(np);
if (count == 0)
return -ENODEV;

--
2.7.4