target/linux/mediatek/patches-5.15/821-v5.16-pinctrl-mediatek-moore-check-if-pin_desc-is-valid-be.patch

   1 From d8b94c9ff96c2024a527086d850eb0b314337ff9 Mon Sep 17 00:00:00 2001
   2 From: Sam Shih <sam.shih@mediatek.com>
   3 Date: Tue, 14 Sep 2021 16:51:32 +0800
   4 Subject: [PATCH] pinctrl: mediatek: moore: check if pin_desc is valid before
   5  use
   6
   7 Certain SoC are missing the middle part gpios in consecutive pins,
   8 it's better to check if mtk_pin_desc is a valid pin for the extensibility
   9
  10 Signed-off-by: Sam Shih <sam.shih@mediatek.com>
  11 Acked-by: Sean Wang <sean.wang@mediatek.com>
  12 Link: https://lore.kernel.org/r/20210914085137.31761-5-sam.shih@mediatek.com
  13 Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
  14 ---
  15  drivers/pinctrl/mediatek/pinctrl-moore.c | 18 ++++++++++++++++++
  16  1 file changed, 18 insertions(+)
  17
  18 --- a/drivers/pinctrl/mediatek/pinctrl-moore.c
  19 +++ b/drivers/pinctrl/mediatek/pinctrl-moore.c
  20 @@ -60,6 +60,8 @@ static int mtk_pinmux_set_mux(struct pin
  21                 int pin = grp->pins[i];
  22
  23                 desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
  24 +               if (!desc->name)
  25 +                       return -ENOTSUPP;
  26
  27                 mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE,
  28                                  pin_modes[i]);
  29 @@ -76,6 +78,8 @@ static int mtk_pinmux_gpio_request_enabl
  30         const struct mtk_pin_desc *desc;
  31
  32         desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
  33 +       if (!desc->name)
  34 +               return -ENOTSUPP;
  35
  36         return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE,
  37                                 hw->soc->gpio_m);
  38 @@ -89,6 +93,8 @@ static int mtk_pinmux_gpio_set_direction
  39         const struct mtk_pin_desc *desc;
  40
  41         desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
  42 +       if (!desc->name)
  43 +               return -ENOTSUPP;
  44
  45         /* hardware would take 0 as input direction */
  46         return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, !input);
  47 @@ -103,6 +109,8 @@ static int mtk_pinconf_get(struct pinctr
  48         const struct mtk_pin_desc *desc;
  49
  50         desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
  51 +       if (!desc->name)
  52 +               return -ENOTSUPP;
  53
  54         switch (param) {
  55         case PIN_CONFIG_BIAS_DISABLE:
  56 @@ -218,6 +226,8 @@ static int mtk_pinconf_set(struct pinctr
  57         int cfg, err = 0;
  58
  59         desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
  60 +       if (!desc->name)
  61 +               return -ENOTSUPP;
  62
  63         for (cfg = 0; cfg < num_configs; cfg++) {
  64                 param = pinconf_to_config_param(configs[cfg]);
  65 @@ -435,6 +445,8 @@ static int mtk_gpio_get(struct gpio_chip
  66         int value, err;
  67
  68         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
  69 +       if (!desc->name)
  70 +               return -ENOTSUPP;
  71
  72         err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DI, &value);
  73         if (err)
  74 @@ -449,6 +461,10 @@ static void mtk_gpio_set(struct gpio_chi
  75         const struct mtk_pin_desc *desc;
  76
  77         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
  78 +       if (!desc->name) {
  79 +               dev_err(hw->dev, "Failed to set gpio %d\n", gpio);
  80 +               return;
  81 +       }
  82
  83         mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, !!value);
  84  }
  85 @@ -490,6 +506,8 @@ static int mtk_gpio_set_config(struct gp
  86         u32 debounce;
  87
  88         desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset];
  89 +       if (!desc->name)
  90 +               return -ENOTSUPP;
  91
  92         if (!hw->eint ||
  93             pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE ||