linux-kernel - [PATCH v4 4/5] pintcrl: support bias-disable of generic and special pins simultaneously

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Date:   Thu, 22 Mar 2018 10:58:42 +0800
From:   Zhiyong Tao <zhiyong.tao@...iatek.com>
To:     <robh+dt@...nel.org>, <linus.walleij@...aro.org>,
        <mark.rutland@....com>, <matthias.bgg@...il.com>
CC:     <srv_heupstream@...iatek.com>, <liguo.zhang@...iatek.com>,
        <yingjoe.chen@...iatek.com>, <hongkun.cao@...iatek.com>,
        <biao.huang@...iatek.com>, <yt.shen@...iatek.com>,
        <hongzhou.yang@...iatek.com>, <erin.lo@...iatek.com>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <linux-gpio@...r.kernel.org>,
        Zhiyong Tao <zhiyong.tao@...iatek.com>
Subject: [PATCH v4 4/5] pintcrl: 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@...iatek.com>
---
 drivers/pinctrl/mediatek/pinctrl-mtk-common.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
index 3cf384f..f991ff3 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
+++ b/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;
 	}
-- 
1.9.1