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

Jon Hunter
2018-04-11T09:07:47Z

On 10/04/18 13:51, Geert Uytterhoeven wrote:
> 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;
>
>

Acked-by: Jon Hunter <jonathanh@nvidia.com>

Cheers
Jon