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pinctrl: meson: Fix wrong shift value when get drive-strength

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commit 35c60be220 upstream.

In meson_pinconf_get_drive_strength, variable bit is calculated by
meson_calc_reg_and_bit, this value is the offset from the first pin of a
certain bank to current pin, while Meson SoCs use two bits for each pin
to depict drive-strength. So a left shift by 1 should be done or node
pinconf-pins shows wrong message.

Fixes: 6ea3e3bbef ("pinctrl: meson: add support of drive-strength-microamp")

Signed-off-by: Qianggui Song <qianggui.song@amlogic.com>
Link: https://lore.kernel.org/r/20191226023734.9631-1-qianggui.song@amlogic.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Qianggui Song 2019-12-26 10:37:34 +08:00 committed by Greg Kroah-Hartman
parent 8457f26af0
commit 24fde17ee8
1 changed files with 1 additions and 0 deletions
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1
drivers/pinctrl/meson/pinctrl-meson.c
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@ -441,6 +441,7 @@ static int meson_pinconf_get_drive_strength(struct meson_pinctrl *pc,
return ret;
meson_calc_reg_and_bit(bank, pin, REG_DS, &reg, &bit);
bit = bit << 1;
ret = regmap_read(pc->reg_ds, reg, &val);
if (ret)