From: Patrick Delaunay <patrick.delaunay@st.com>
Date: Wed, 22 Apr 2020 12:29:13 +0000 (+0200)
Subject: board: stm32mp1: gt9147 IRQ before reset on EV1
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=055065a8acfb51b2aed415c62271ac3d5d34b641;p=u-boot.git

board: stm32mp1: gt9147 IRQ before reset on EV1

Software workaround for I2C issue on EV1 board,
configure the IRQ line for touchscreen before LCD reset
to fix the used I2C address.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
---

diff --git a/board/st/stm32mp1/stm32mp1.c b/board/st/stm32mp1/stm32mp1.c
index 20823f511a..62b648f6e4 100644
--- a/board/st/stm32mp1/stm32mp1.c
+++ b/board/st/stm32mp1/stm32mp1.c
@@ -616,6 +616,38 @@ static bool board_is_dk2(void)
 }
 #endif
 
+static bool board_is_ev1(void)
+{
+	if (CONFIG_IS_ENABLED(TARGET_ST_STM32MP15x) &&
+	    (of_machine_is_compatible("st,stm32mp157a-ev1") ||
+	     of_machine_is_compatible("st,stm32mp157c-ev1") ||
+	     of_machine_is_compatible("st,stm32mp157d-ev1") ||
+	     of_machine_is_compatible("st,stm32mp157f-ev1")))
+		return true;
+
+	return false;
+}
+
+/* touchscreen driver: only used for pincontrol configuration */
+static const struct udevice_id goodix_ids[] = {
+	{ .compatible = "goodix,gt9147", },
+	{ }
+};
+
+U_BOOT_DRIVER(goodix) = {
+	.name		= "goodix",
+	.id		= UCLASS_NOP,
+	.of_match	= goodix_ids,
+};
+
+static void board_ev1_init(void)
+{
+	struct udevice *dev;
+
+	/* configure IRQ line on EV1 for touchscreen before LCD reset */
+	uclass_get_device_by_driver(UCLASS_NOP, DM_GET_DRIVER(goodix), &dev);
+}
+
 /* board dependent setup after realloc */
 int board_init(void)
 {
@@ -633,6 +665,9 @@ int board_init(void)
 
 	board_key_check();
 
+	if (board_is_ev1())
+		board_ev1_init();
+
 #ifdef CONFIG_DM_REGULATOR
 	if (board_is_dk2())
 		dk2_i2c1_fix();