pintcrl: mtk: support bias-disable of generic and special pins simultaneously

For generic pins, parameter "arg" is 0 or 1.
For special pins, bias-disable is set by R0R1,
so we need transmited "00" to set bias-disable
When we set "bias-disable" as high-z property,
the parameter should be "MTK_PUPD_SET_R1R0_00".
Signed-off-by: Zhiyong Tao <zhiyong.tao@mediatek.com>
Reviewed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/mediatek/pinctrl-mtk-common.c

@@ -293,7 +293,7 @@ static int mtk_pconf_set_pull_select(struct mtk_pinctrl *pctl,
 		unsigned int pin, bool enable, bool isup, unsigned int arg)
 {
 	unsigned int bit;
-	unsigned int reg_pullen, reg_pullsel;
+	unsigned int reg_pullen, reg_pullsel, r1r0;
 	int ret;
 
 	/* Some pins' pull setting are very different,
@@ -301,8 +301,12 @@ static int mtk_pconf_set_pull_select(struct mtk_pinctrl *pctl,
 	 * resistor bit, so we need this special handle.
 	 */
 	if (pctl->devdata->spec_pull_set) {
+		/* For special pins, bias-disable is set by R1R0,
+		 * the parameter should be "MTK_PUPD_SET_R1R0_00".
+		 */
+		r1r0 = enable ? arg : MTK_PUPD_SET_R1R0_00;
 		ret = pctl->devdata->spec_pull_set(mtk_get_regmap(pctl, pin),
-			pin, pctl->devdata->port_align, isup, arg);
+			pin, pctl->devdata->port_align, isup, r1r0);
 		if (!ret)
 			return 0;
 	}