openwrt/package/boot/uboot-mediatek/patches/000-mtk-05-pinctrl-mediatek-do-not-probe-gpio-driver-if-not-ena.patch

From d3fbbef13853a695cdea75a980a3d6bd150a68c1 Mon Sep 17 00:00:00 2001
From: Weijie Gao <weijie.gao@mediatek.com>
Date: Mon, 11 Jan 2021 10:17:15 +0800
Subject: [PATCH 05/21] pinctrl: mediatek: do not probe gpio driver if not
 enabled

The mtk pinctrl driver is a combination driver with support for both
pinctrl and gpio. When this driver is used in SPL, gpio support may not be
enabled, and this will result in a compilation error.

To fix this, macros are added to make sure gpio related code will only be
compiled when gpio support is enabled.

Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
---
 drivers/pinctrl/mediatek/pinctrl-mtk-common.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
@@ -540,6 +540,8 @@ const struct pinctrl_ops mtk_pinctrl_ops
 	.set_state = pinctrl_generic_set_state,
 };
 
+#if CONFIG_IS_ENABLED(DM_GPIO) || \
+    (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_GPIO_SUPPORT))
 static int mtk_gpio_get(struct udevice *dev, unsigned int off)
 {
 	int val, err;
@@ -647,12 +649,13 @@ static int mtk_gpiochip_register(struct
 
 	return 0;
 }
+#endif
 
 int mtk_pinctrl_common_probe(struct udevice *dev,
 			     struct mtk_pinctrl_soc *soc)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
-	int ret;
+	int ret = 0;
 
 	priv->base = dev_read_addr_ptr(dev);
 	if (!priv->base)
@@ -660,9 +663,10 @@ int mtk_pinctrl_common_probe(struct udev
 
 	priv->soc = soc;
 
+#if CONFIG_IS_ENABLED(DM_GPIO) || \
+    (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_GPIO_SUPPORT))
 	ret = mtk_gpiochip_register(dev);
-	if (ret)
-		return ret;
+#endif
 
-	return 0;
+	return ret;
 }