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| author | Yingjoe Chen <yingjoe.chen@mediatek.com> | 2015-05-18 23:11:15 -0700 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2015-05-19 11:13:51 +0200 |
| commit | e73fe2713fc9e8ab8d2d039abc48f7684b60f5ac (patch) | |
| tree | 69cf94dbda42e8a3a9a936e780de44afceaa0011 /drivers/pinctrl/mediatek/pinctrl-mtk-common.c | |
| parent | 4b9b5268460cbc85270b309559b8f3f48295709a (diff) | |
| download | linux-e73fe2713fc9e8ab8d2d039abc48f7684b60f5ac.tar.bz2 | |
pinctrl: mediatek: add mtk_pctrl_spec_pull_set_samereg common code
Several mediatek soc use similar pull setting procedure as mt8173,
the pupd enable and resistance setting are in the same register.
Add common code mtk_pctrl_spec_pull_set_samereg out of spec_pull_set
in mt8173 to handle this case, so future soc driver can use it.
Signed-off-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
Signed-off-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/mediatek/pinctrl-mtk-common.c')
| -rw-r--r-- | drivers/pinctrl/mediatek/pinctrl-mtk-common.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c index 493294c0ebe6..0aee6bc4a484 100644 --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c @@ -186,6 +186,66 @@ static int mtk_pconf_set_driving(struct mtk_pinctrl *pctl, return -EINVAL; } +int mtk_pctrl_spec_pull_set_samereg(struct regmap *regmap, + const struct mtk_pin_spec_pupd_set_samereg *pupd_infos, + unsigned int info_num, unsigned int pin, + unsigned char align, bool isup, unsigned int r1r0) +{ + unsigned int i; + unsigned int reg_pupd, reg_set, reg_rst; + unsigned int bit_pupd, bit_r0, bit_r1; + const struct mtk_pin_spec_pupd_set_samereg *spec_pupd_pin; + bool find = false; + + for (i = 0; i < info_num; i++) { + if (pin == pupd_infos[i].pin) { + find = true; + break; + } + } + + if (!find) + return -EINVAL; + + spec_pupd_pin = pupd_infos + i; + reg_set = spec_pupd_pin->offset + align; + reg_rst = spec_pupd_pin->offset + (align << 1); + + if (isup) + reg_pupd = reg_rst; + else + reg_pupd = reg_set; + + bit_pupd = BIT(spec_pupd_pin->pupd_bit); + regmap_write(regmap, reg_pupd, bit_pupd); + + bit_r0 = BIT(spec_pupd_pin->r0_bit); + bit_r1 = BIT(spec_pupd_pin->r1_bit); + + switch (r1r0) { + case MTK_PUPD_SET_R1R0_00: + regmap_write(regmap, reg_rst, bit_r0); + regmap_write(regmap, reg_rst, bit_r1); + break; + case MTK_PUPD_SET_R1R0_01: + regmap_write(regmap, reg_set, bit_r0); + regmap_write(regmap, reg_rst, bit_r1); + break; + case MTK_PUPD_SET_R1R0_10: + regmap_write(regmap, reg_rst, bit_r0); + regmap_write(regmap, reg_set, bit_r1); + break; + case MTK_PUPD_SET_R1R0_11: + regmap_write(regmap, reg_set, bit_r0); + regmap_write(regmap, reg_set, bit_r1); + break; + default: + return -EINVAL; + } + + return 0; +} + static int mtk_pconf_set_pull_select(struct mtk_pinctrl *pctl, unsigned int pin, bool enable, bool isup, unsigned int arg) { |