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

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: 6ea3e3b ("pinctrl: meson: add support of drive-strength-microamp")

Signed-off-by: Qianggui Song <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Linus Walleij <[email protected]>

Author: Qianggui Song

drivers/pinctrl/meson/pinctrl-meson.c

@@ -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)