[PATCH] ARM: sunxi: gpio: Add Allwinner SoCs GPIO drivers
Linus Walleij
linus.walleij at linaro.org
Wed Jan 23 10:39:11 EST 2013
On Wed, Jan 23, 2013 at 10:34 AM, Maxime Ripard
<maxime.ripard at free-electrons.com> wrote:
> The IP responsible for the muxing on the Allwinner SoCs are also
> handling the GPIOs on the system. This patch adds the needed driver that
> relies on the pinctrl driver for most of its operations.
>
> The number of pins available for GPIOs operations are already declared
> in the pinctrl driver, we only need to probe a generic driver to handle
> the banks available for each SoC.
>
> This driver has been tested on a A13-Olinuxino.
>
> Signed-off-by: Maxime Ripard <maxime.ripard at free-electrons.com>
Overall this is VERY NICE!
> + char *func, *pin_name;
(...)
> + pin_name = kzalloc(5, GFP_KERNEL);
> + if (!pin_name)
> + return -ENOMEM;
> +
> + ret = sprintf(pin_name, "P%c%d", 'A' + bank, pin);
> + if (!ret)
> + goto error;
(...)
> +error:
> + kfree(pin_name);
Isn't this a bit awkward?
Can't you either use something like a local
static char foo[MAX_SIZE]; or atleast try to use
one of the static string print functions from <linux/kernel.h>:
/* lib/printf utilities */
extern __printf(2, 3) int sprintf(char *buf, const char * fmt, ...);
extern __printf(2, 0) int vsprintf(char *buf, const char *, va_list);
extern __printf(3, 4)
int snprintf(char *buf, size_t size, const char *fmt, ...);
extern __printf(3, 0)
int vsnprintf(char *buf, size_t size, const char *fmt, va_list args);
extern __printf(3, 4)
int scnprintf(char *buf, size_t size, const char *fmt, ...);
extern __printf(3, 0)
int vscnprintf(char *buf, size_t size, const char *fmt, va_list args);
extern __printf(2, 3)
char *kasprintf(gfp_t gfp, const char *fmt, ...);
extern char *kvasprintf(gfp_t gfp, const char *fmt, va_list args);
Yours,
Linus Walleij
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