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Date: Sat, 8 Jun 2013 12:05:43 +0200 From: Maxime Ripard <maxime.ripard@...e-electrons.com> To: Linus Walleij <linus.walleij@...aro.org> Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, Emilio Lopez <emilio@...pez.com.ar>, kevin@...winnertech.com, sunny@...winnertech.com, shuge@...winnertech.com, linux-sunxi@...glegroups.com, Maxime Ripard <maxime.ripard@...e-electrons.com> Subject: [PATCH 1/4] 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@...e-electrons.com> --- drivers/pinctrl/pinctrl-sunxi.c | 50 ++++++++++++++++++++++++----------------- 1 file changed, 29 insertions(+), 21 deletions(-) diff --git a/drivers/pinctrl/pinctrl-sunxi.c b/drivers/pinctrl/pinctrl-sunxi.c index c52fc2c..0e7961c 100644 --- a/drivers/pinctrl/pinctrl-sunxi.c +++ b/drivers/pinctrl/pinctrl-sunxi.c @@ -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 = { -- 1.8.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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