gpio: rockchip: change the GPIO version judgment logic

Have a list of valid IDs and default to -ENODEV.

Signed-off-by: Ye Zhang <[email protected]>
Reviewed-by: Sebastian Reichel <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Bartosz Golaszewski <[email protected]>

Author: Ye Zhang

drivers/gpio/gpio-rockchip.c

@@ -667,8 +667,9 @@ static int rockchip_get_bank_data(struct rockchip_pin_bank *bank)
 	clk_prepare_enable(bank->clk);
 	id = readl(bank->reg_base + gpio_regs_v2.version_id);
 
-	/* If not gpio v2, that is default to v1. */
-	if (id == GPIO_TYPE_V2 || id == GPIO_TYPE_V2_1) {
+	switch (id) {
+	case GPIO_TYPE_V2:
+	case GPIO_TYPE_V2_1:
 		bank->gpio_regs = &gpio_regs_v2;
 		bank->gpio_type = GPIO_TYPE_V2;
 		bank->db_clk = of_clk_get(bank->of_node, 1);
@@ -677,9 +678,14 @@ static int rockchip_get_bank_data(struct rockchip_pin_bank *bank)
 			clk_disable_unprepare(bank->clk);
 			return -EINVAL;
 		}
-	} else {
+		break;
+	case GPIO_TYPE_V1:
 		bank->gpio_regs = &gpio_regs_v1;
 		bank->gpio_type = GPIO_TYPE_V1;
+		break;
+	default:
+		dev_err(bank->dev, "unsupported version ID: 0x%08x\n", id);
+		return -ENODEV;
 	}
 
 	return 0;