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pinctrl: mediatek: Fix fallback behavior for bias_set_combo

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commit 798a315fc359aa6dbe48e09d802aa59b7e158ffc upstream.

Some pin doesn't support PUPD register, if it fails and fallbacks with
bias_set_combo case, it will call mtk_pinconf_bias_set_pupd_r1_r0() to
modify the PUPD pin again.

Since the general bias set are either PU/PD or PULLSEL/PULLEN, try
bias_set or bias_set_rev1 for the other fallback case. If the pin
doesn't support neither PU/PD nor PULLSEL/PULLEN, it will return
-ENOTSUPP.

Fixes: 81bd1579b43e ("pinctrl: mediatek: Fix fallback call path")
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: Zhiyong Tao <zhiyong.tao@mediatek.com>
Link: https://lore.kernel.org/r/20210701080955.2660294-1-hsinyi@chromium.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hsin-Yi Wang 2021-07-01 16:09:55 +08:00 committed by Greg Kroah-Hartman
parent 3bbbcafb0d
commit 1c86f75da0
1 changed files with 3 additions and 5 deletions
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8
drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
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@ -877,12 +877,10 @@ int mtk_pinconf_adv_pull_set(struct mtk_pinctrl *hw,
err = hw->soc->bias_set(hw, desc, pullup);
if (err)
return err;
} else if (hw->soc->bias_set_combo) {
err = hw->soc->bias_set_combo(hw, desc, pullup, arg);
if (err)
return err;
} else {
return -ENOTSUPP;
err = mtk_pinconf_bias_set_rev1(hw, desc, pullup);
if (err)
err = mtk_pinconf_bias_set(hw, desc, pullup);
}
}