pinctrl: mediatek: extend pinctrl-moore to support new bias functions

Commit fb34a9ae ("pinctrl: mediatek: support rsel feature")
introduced SoC specify 'pull_type' attribute to mtk_pinconf_bias_set_combo
and mtk_pinconf_bias_get_combo, and make the functions able to support
almost all Mediatek SoCs that use pinctrl-mtk-common-v2.c.

This patch enables pinctrl_moore to support these functions.
Signed-off-by: Sam Shih <sam.shih@mediatek.com>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20221106080114.7426-6-linux@fw-web.deSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/mediatek/pinctrl-moore.c

@@ -8,6 +8,7 @@
  *
  */
 
+#include <dt-bindings/pinctrl/mt65xx.h>
 #include <linux/gpio/driver.h>
 
 #include <linux/pinctrl/consumer.h>
@@ -108,7 +109,7 @@ static int mtk_pinconf_get(struct pinctrl_dev *pctldev,
 {
 	struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 	u32 param = pinconf_to_config_param(*config);
-	int val, val2, err, reg, ret = 1;
+	int val, val2, err, pullup, reg, ret = 1;
 	const struct mtk_pin_desc *desc;
 
 	desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
@@ -117,7 +118,13 @@ static int mtk_pinconf_get(struct pinctrl_dev *pctldev,
 
 	switch (param) {
 	case PIN_CONFIG_BIAS_DISABLE:
-		if (hw->soc->bias_disable_get) {
+		if (hw->soc->bias_get_combo) {
+			err = hw->soc->bias_get_combo(hw, desc, &pullup, &ret);
+			if (err)
+				return err;
+			if (ret != MTK_PUPD_SET_R1R0_00 && ret != MTK_DISABLE)
+				return -EINVAL;
+		} else if (hw->soc->bias_disable_get) {
 			err = hw->soc->bias_disable_get(hw, desc, &ret);
 			if (err)
 				return err;
@@ -126,7 +133,15 @@ static int mtk_pinconf_get(struct pinctrl_dev *pctldev,
 		}
 		break;
 	case PIN_CONFIG_BIAS_PULL_UP:
-		if (hw->soc->bias_get) {
+		if (hw->soc->bias_get_combo) {
+			err = hw->soc->bias_get_combo(hw, desc, &pullup, &ret);
+			if (err)
+				return err;
+			if (ret == MTK_PUPD_SET_R1R0_00 || ret == MTK_DISABLE)
+				return -EINVAL;
+			if (!pullup)
+				return -EINVAL;
+		} else if (hw->soc->bias_get) {
 			err = hw->soc->bias_get(hw, desc, 1, &ret);
 			if (err)
 				return err;
@@ -135,7 +150,15 @@ static int mtk_pinconf_get(struct pinctrl_dev *pctldev,
 		}
 		break;
 	case PIN_CONFIG_BIAS_PULL_DOWN:
-		if (hw->soc->bias_get) {
+		if (hw->soc->bias_get_combo) {
+			err = hw->soc->bias_get_combo(hw, desc, &pullup, &ret);
+			if (err)
+				return err;
+			if (ret == MTK_PUPD_SET_R1R0_00 || ret == MTK_DISABLE)
+				return -EINVAL;
+			if (pullup)
+				return -EINVAL;
+		} else if (hw->soc->bias_get) {
 			err = hw->soc->bias_get(hw, desc, 0, &ret);
 			if (err)
 				return err;
@@ -238,7 +261,11 @@ static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
 
 		switch (param) {
 		case PIN_CONFIG_BIAS_DISABLE:
-			if (hw->soc->bias_disable_set) {
+			if (hw->soc->bias_set_combo) {
+				err = hw->soc->bias_set_combo(hw, desc, 0, MTK_DISABLE);
+				if (err)
+					return err;
+			} else if (hw->soc->bias_disable_set) {
 				err = hw->soc->bias_disable_set(hw, desc);
 				if (err)
 					return err;
@@ -247,7 +274,11 @@ static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
 			}
 			break;
 		case PIN_CONFIG_BIAS_PULL_UP:
-			if (hw->soc->bias_set) {
+			if (hw->soc->bias_set_combo) {
+				err = hw->soc->bias_set_combo(hw, desc, 1, arg);
+				if (err)
+					return err;
+			} else if (hw->soc->bias_set) {
 				err = hw->soc->bias_set(hw, desc, 1);
 				if (err)
 					return err;
@@ -256,7 +287,11 @@ static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
 			}
 			break;
 		case PIN_CONFIG_BIAS_PULL_DOWN:
-			if (hw->soc->bias_set) {
+			if (hw->soc->bias_set_combo) {
+				err = hw->soc->bias_set_combo(hw, desc, 0, arg);
+				if (err)
+					return err;
+			} else if (hw->soc->bias_set) {
 				err = hw->soc->bias_set(hw, desc, 0);
 				if (err)
 					return err;