[PATCH v3 1/4] pinctrl: mediatek: add support for MTK_PULL_PD_TYPE

Frank Wunderlich
2024-10-07T20:31:09Z

From: Daniel Golle <daniel@makrotopia.org>

The MediaTek MT7988 SoC got some pins which only got configurable
pull-down but unlike previous designs there is no pull-up option.
Add new type MTK_PULL_PD_TYPE to support configuring such pins.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
---
.../pinctrl/mediatek/pinctrl-mtk-common-v2.c | 59 +++++++++++++++++++
.../pinctrl/mediatek/pinctrl-mtk-common-v2.h | 1 +
2 files changed, 60 insertions(+)

diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
index 54301fbba524..eff2aecd31dd 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
@@ -601,6 +601,30 @@ static int mtk_pinconf_bias_set_pu_pd(struct mtk_pinctrl *hw,
return err;
}

+static int mtk_pinconf_bias_set_pd(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc,
+ u32 pullup, u32 arg)
+{
+ int err, pd;
+
+ if (arg == MTK_DISABLE)
+ pd = 0;
+ else if ((arg == MTK_ENABLE) && pullup)
+ pd = 0;
+ else if ((arg == MTK_ENABLE) && !pullup)
+ pd = 1;
+ else {
+ err = -EINVAL;
+ goto out;
+ }
+
+ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PD, pd);
+
+out:
+ return err;
+
+}
+
static int mtk_pinconf_bias_set_pullsel_pullen(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc,
u32 pullup, u32 arg)
@@ -758,6 +782,12 @@ int mtk_pinconf_bias_set_combo(struct mtk_pinctrl *hw,
return 0;
}

+ if (try_all_type & MTK_PULL_PD_TYPE) {
+ err = mtk_pinconf_bias_set_pd(hw, desc, pullup, arg);
+ if (!err)
+ return err;
+ }
+
if (try_all_type & MTK_PULL_PU_PD_TYPE) {
err = mtk_pinconf_bias_set_pu_pd(hw, desc, pullup, arg);
if (!err)
@@ -878,6 +908,29 @@ static int mtk_pinconf_bias_get_pu_pd(struct mtk_pinctrl *hw,
return err;
}

+static int mtk_pinconf_bias_get_pd(struct mtk_pinctrl *hw,
+ const struct mtk_pin_desc *desc,
+ u32 *pullup, u32 *enable)
+{
+ int err, pd;
+
+ err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PD, &pd);
+ if (err)
+ goto out;
+
+ if (pd == 0) {
+ *pullup = 0;
+ *enable = MTK_DISABLE;
+ } else if (pd == 1) {
+ *pullup = 0;
+ *enable = MTK_ENABLE;
+ } else
+ err = -EINVAL;
+
+out:
+ return err;
+}
+
static int mtk_pinconf_bias_get_pullsel_pullen(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc,
u32 *pullup, u32 *enable)
@@ -947,6 +1000,12 @@ int mtk_pinconf_bias_get_combo(struct mtk_pinctrl *hw,
return 0;
}

+ if (try_all_type & MTK_PULL_PD_TYPE) {
+ err = mtk_pinconf_bias_get_pd(hw, desc, pullup, enable);
+ if (!err)
+ return err;
+ }
+
if (try_all_type & MTK_PULL_PU_PD_TYPE) {
err = mtk_pinconf_bias_get_pu_pd(hw, desc, pullup, enable);
if (!err)
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h
index 23688ca6d04e..9c271dc2b521 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h
@@ -24,6 +24,7 @@
* turned on/off itself. But it can't be selected pull up/down
*/
#define MTK_PULL_RSEL_TYPE BIT(3)
+#define MTK_PULL_PD_TYPE BIT(4)
/* MTK_PULL_PU_PD_RSEL_TYPE is a type which is controlled by
* MTK_PULL_PU_PD_TYPE and MTK_PULL_RSEL_TYPE.
*/
--
2.43.0