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pinctrl: mediatek: extend advanced pull support in pinctrl-mtk-common-v2.c 

Extend the advanced pull based on the legacy bias plus additional r0 and r1
to tweak the resistor level.

Signed-off-by: Zhiyong Tao <zhiyong.tao@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Sean Wang 2018-09-08 19:07:35 +08:00 committed by Linus Walleij
parent 750cd15d90
commit 79348f6fb7
1 changed files with 32 additions and 5 deletions
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37
drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
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@ -476,6 +476,19 @@ int mtk_pinconf_adv_pull_set(struct mtk_pinctrl *hw,
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PUPD, arg);
/* If PUPD register is not supported for that pin, let's fallback to
* general bias control.
*/
if (err == -ENOTSUPP) {
if (hw->soc->bias_set) {
err = hw->soc->bias_set(hw, desc, pullup);
if (err)
return err;
} else {
return -ENOTSUPP;
}
}
return err;
}
@ -487,12 +500,26 @@ int mtk_pinconf_adv_pull_get(struct mtk_pinctrl *hw,
int err;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PUPD, &t);
if (err)
return err;
/* t == 0 supposes PULLUP for the customized PULL setup */
if (pullup ^ !t)
return -EINVAL;
/* If PUPD register is not supported for that pin, let's fallback to
* general bias control.
*/
if (err == -ENOTSUPP) {
if (hw->soc->bias_get) {
err = hw->soc->bias_get(hw, desc, pullup, val);
if (err)
return err;
} else {
return -ENOTSUPP;
}
} else {
/* t == 0 supposes PULLUP for the customized PULL setup */
if (err)
return err;
if (pullup ^ !t)
return -EINVAL;
}
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_R0, &t);
if (err)