From patchwork Tue Mar 31 16:04:26 2020
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X-Patchwork-Submitter: Patrick Delaunay <patrick.delaunay@st.com>
X-Patchwork-Id: 244655
List-Id: U-Boot discussion <u-boot.lists.denx.de>
From: patrick.delaunay at st.com (Patrick Delaunay)
Date: Tue, 31 Mar 2020 18:04:26 +0200
Subject: [PATCH 09/16] board: stm32mp1: gt9147 IRQ before reset on EV1
In-Reply-To: <20200331180330.1.Ied6708bad5048382a57618f95d67c549aae49f42@changeid>
References: <20200331180330.1.Ied6708bad5048382a57618f95d67c549aae49f42@changeid>
Message-ID: <20200331180330.9.I5d296f8fd82b60a592b51029e7e420672d0e855b@changeid>

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 at st.com>
---

 board/st/stm32mp1/stm32mp1.c | 41 ++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/board/st/stm32mp1/stm32mp1.c b/board/st/stm32mp1/stm32mp1.c
index 6ca47509b3..52881adef7 100644
--- a/board/st/stm32mp1/stm32mp1.c
+++ b/board/st/stm32mp1/stm32mp1.c
@@ -626,6 +626,44 @@ 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 int board_ev1_init(void)
+{
+	struct udevice *dev;
+	int ret;
+
+	/* configure IRQ line on EV1 for touchscreen before LCD reset */
+	ret = uclass_get_device_by_driver(UCLASS_NOP, DM_GET_DRIVER(goodix),
+					  &dev);
+	if (ret)
+		debug("goodix init failed: %d\n", ret);
+
+	return ret;
+}
+
 /* board dependent setup after realloc */
 int board_init(void)
 {
@@ -643,6 +681,9 @@ 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();