From 055065a8acfb51b2aed415c62271ac3d5d34b641 Mon Sep 17 00:00:00 2001
From: Patrick Delaunay <patrick.delaunay@st.com>
Date: Wed, 22 Apr 2020 14:29:13 +0200
Subject: [PATCH] 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>
---
board/st/stm32mp1/stm32mp1.c | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
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();
--
2.39.5