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From:   bchihi@baylibre.com
To:     sean.wang@kernel.org, linus.walleij@linaro.org,
        matthias.bgg@gmail.com
Cc:     linux-mediatek@lists.infradead.org, linux-gpio@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: [v2, 1/2] pinctrl: mediatek: common: add mt8365_set_clr_mode() callback for broken SET/CLR modes
Date:   Fri, 21 Oct 2022 10:47:07 +0200
Message-Id: <20221021084708.1109986-2-bchihi@baylibre.com>
In-Reply-To: <20221021084708.1109986-1-bchihi@baylibre.com>
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From: Balsam CHIHI <bchihi@baylibre.com>

On MT8365, the SET/CLR of the mode is broken and some pin modes won't
be set correctly.
Add mt8365_set_clr_mode() callback for such SoCs, so that instead of
using the SET/CLR register, use the main R/W register to
read/update/write the modes.

Co-developed-by: Fabien Parent <fparent@baylibre.com>
Signed-off-by: Fabien Parent <fparent@baylibre.com>
Signed-off-by: Balsam CHIHI <bchihi@baylibre.com>
---
 drivers/pinctrl/mediatek/pinctrl-mtk-common.c | 15 +++++++++++++++
 drivers/pinctrl/mediatek/pinctrl-mtk-common.h |  8 +++++++-
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
index f25b3e09386b..076ae0b38e3d 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
@@ -330,6 +330,21 @@ static int mtk_pconf_set_pull_select(struct mtk_pinctrl *pctl,
 		return -EINVAL;
 	}
 
+	if (pctl->devdata->mt8365_set_clr_mode) {
+		bit = pin & pctl->devdata->mode_mask;
+		reg_pullen = mtk_get_port(pctl, pin) +
+			pctl->devdata->pullen_offset;
+		reg_pullsel = mtk_get_port(pctl, pin) +
+			pctl->devdata->pullsel_offset;
+		ret = pctl->devdata->mt8365_set_clr_mode(mtk_get_regmap(pctl, pin),
+			bit, reg_pullen, reg_pullsel,
+			enable, isup);
+		if (ret)
+			return -EINVAL;
+
+		return 0;
+	}
+
 	bit = BIT(pin & pctl->devdata->mode_mask);
 	if (enable)
 		reg_pullen = SET_ADDR(mtk_get_port(pctl, pin) +
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.h b/drivers/pinctrl/mediatek/pinctrl-mtk-common.h
index 6fe8564334c9..11afa12a96cb 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.h
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.h
@@ -216,7 +216,10 @@ struct mtk_eint_offsets {
  * @spec_dir_set: In very few SoCs, direction control registers are not
  * arranged continuously, they may be cut to parts. So they need special
  * dir setting.
-
+ * @mt8365_set_clr_mode: In mt8365, some pins won't set correcty because they
+ * need to use the main R/W register to read/update/write the modes instead of
+ * the SET/CLR register.
+ *
  * @dir_offset: The direction register offset.
  * @pullen_offset: The pull-up/pull-down enable register offset.
  * @pinmux_offset: The pinmux register offset.
@@ -252,6 +255,9 @@ struct mtk_pinctrl_devdata {
 	void (*spec_pinmux_set)(struct regmap *reg, unsigned int pin,
 			unsigned int mode);
 	void (*spec_dir_set)(unsigned int *reg_addr, unsigned int pin);
+	int (*mt8365_set_clr_mode)(struct regmap *regmap,
+			unsigned int bit, unsigned int reg_pullen, unsigned int reg_pullsel,
+			bool enable, bool isup);
 	unsigned int dir_offset;
 	unsigned int ies_offset;
 	unsigned int smt_offset;
-- 
2.34.1