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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 ||
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