mediatek: backport new pinctrl features

Backport new features for MediaTek pinctrl/pinconf drivers from upstream.
This will serve as the base to improve pinconf bias/pull-up/pull-down on
MT7981 and MT7986, and also prepare for upcoming support for MT7988.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

1 files changed, 93 insertions, 0 deletions

diff --git a/target/linux/mediatek/patches-5.15/821-v5.16-pinctrl-mediatek-moore-check-if-pin_desc-is-valid-be.patch b/target/linux/mediatek/patches-5.15/821-v5.16-pinctrl-mediatek-moore-check-if-pin_desc-is-valid-be.patch
new file mode 100644
index 0000000000..aa9f879e3a
--- /dev/null
+++ b/target/linux/mediatek/patches-5.15/821-v5.16-pinctrl-mediatek-moore-check-if-pin_desc-is-valid-be.patch
@@ -0,0 +1,93 @@
+From d8b94c9ff96c2024a527086d850eb0b314337ff9 Mon Sep 17 00:00:00 2001
+From: Sam Shih <sam.shih@mediatek.com>
+Date: Tue, 14 Sep 2021 16:51:32 +0800
+Subject: [PATCH] pinctrl: mediatek: moore: check if pin_desc is valid before
+ use
+
+Certain SoC are missing the middle part gpios in consecutive pins,
+it's better to check if mtk_pin_desc is a valid pin for the extensibility
+
+Signed-off-by: Sam Shih <sam.shih@mediatek.com>
+Acked-by: Sean Wang <sean.wang@mediatek.com>
+Link: https://lore.kernel.org/r/20210914085137.31761-5-sam.shih@mediatek.com
+Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
+---
+ drivers/pinctrl/mediatek/pinctrl-moore.c | 18 ++++++++++++++++++
+ 1 file changed, 18 insertions(+)
+
+--- a/drivers/pinctrl/mediatek/pinctrl-moore.c
++++ b/drivers/pinctrl/mediatek/pinctrl-moore.c
+@@ -60,6 +60,8 @@ static int mtk_pinmux_set_mux(struct pin
+ 		int pin = grp->pins[i];
+ 
+ 		desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
++		if (!desc->name)
++			return -ENOTSUPP;
+ 
+ 		mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE,
+ 				 pin_modes[i]);
+@@ -76,6 +78,8 @@ static int mtk_pinmux_gpio_request_enabl
+ 	const struct mtk_pin_desc *desc;
+ 
+ 	desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
++	if (!desc->name)
++		return -ENOTSUPP;
+ 
+ 	return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE,
+ 				hw->soc->gpio_m);
+@@ -89,6 +93,8 @@ static int mtk_pinmux_gpio_set_direction
+ 	const struct mtk_pin_desc *desc;
+ 
+ 	desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
++	if (!desc->name)
++		return -ENOTSUPP;
+ 
+ 	/* hardware would take 0 as input direction */
+ 	return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, !input);
+@@ -103,6 +109,8 @@ static int mtk_pinconf_get(struct pinctr
+ 	const struct mtk_pin_desc *desc;
+ 
+ 	desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
++	if (!desc->name)
++		return -ENOTSUPP;
+ 
+ 	switch (param) {
+ 	case PIN_CONFIG_BIAS_DISABLE:
+@@ -218,6 +226,8 @@ static int mtk_pinconf_set(struct pinctr
+ 	int cfg, err = 0;
+ 
+ 	desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
++	if (!desc->name)
++		return -ENOTSUPP;
+ 
+ 	for (cfg = 0; cfg < num_configs; cfg++) {
+ 		param = pinconf_to_config_param(configs[cfg]);
+@@ -435,6 +445,8 @@ static int mtk_gpio_get(struct gpio_chip
+ 	int value, err;
+ 
+ 	desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
++	if (!desc->name)
++		return -ENOTSUPP;
+ 
+ 	err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DI, &value);
+ 	if (err)
+@@ -449,6 +461,10 @@ static void mtk_gpio_set(struct gpio_chi
+ 	const struct mtk_pin_desc *desc;
+ 
+ 	desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
++	if (!desc->name) {
++		dev_err(hw->dev, "Failed to set gpio %d\n", gpio);
++		return;
++	}
+ 
+ 	mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, !!value);
+ }
+@@ -490,6 +506,8 @@ static int mtk_gpio_set_config(struct gp
+ 	u32 debounce;
+ 
+ 	desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset];
++	if (!desc->name)
++		return -ENOTSUPP;
+ 
+ 	if (!hw->eint ||
+ 	    pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE ||