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pinctrl: sunxi: Search the description array by pin id 

Avoid to use expensive string manipulation functions and search by pin
id when possible.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Maxime Ripard 2013-06-08 12:05:43 +02:00 committed by Linus Walleij
parent 79bae27ff9
commit 814d4f2e15
1 changed files with 29 additions and 21 deletions
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50
drivers/pinctrl/pinctrl-sunxi.c
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@ -1399,6 +1399,31 @@ sunxi_pinctrl_desc_find_function_by_name(struct sunxi_pinctrl *pctl,
return NULL;
}
static struct sunxi_desc_function *
sunxi_pinctrl_desc_find_function_by_pin(struct sunxi_pinctrl *pctl,
const u16 pin_num,
const char *func_name)
{
int i;
for (i = 0; i < pctl->desc->npins; i++) {
const struct sunxi_desc_pin *pin = pctl->desc->pins + i;
if (pin->pin.number == pin_num) {
struct sunxi_desc_function *func = pin->functions;
while (func->name) {
if (!strcmp(func->name, func_name))
return func;
func++;
}
}
}
return NULL;
}
static int sunxi_pctrl_get_groups_count(struct pinctrl_dev *pctldev)
{
struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
@ -1680,37 +1705,20 @@ sunxi_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
{
struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
struct sunxi_desc_function *desc;
char pin_name[SUNXI_PIN_NAME_MAX_LEN];
const char *func;
u8 bank, pin;
int ret;
bank = (offset) / PINS_PER_BANK;
pin = (offset) % PINS_PER_BANK;
ret = sprintf(pin_name, "P%c%d", 'A' + bank, pin);
if (!ret)
goto error;
if (input)
func = "gpio_in";
else
func = "gpio_out";
desc = sunxi_pinctrl_desc_find_function_by_name(pctl,
pin_name,
func);
if (!desc) {
ret = -EINVAL;
goto error;
}
desc = sunxi_pinctrl_desc_find_function_by_pin(pctl, offset, func);
if (!desc)
return -EINVAL;
sunxi_pmx_set(pctldev, offset, desc->muxval);
ret = 0;
error:
return ret;
return 0;
}
static const struct pinmux_ops sunxi_pmx_ops = {