From a45b233b2bbe9f5a62686321d3d7d93b351e23f6 Mon Sep 17 00:00:00 2001
From: Ondrej Jirman <megi@xff.cz>
Date: Fri, 5 Jul 2024 17:22:12 +0200
Subject: [PATCH] board: pine64: Configure PMIC on Pinephone Pro for
 touchscreen

Touchscreen needs 3V on LDO2.

Signed-off-by: Ondrej Jirman <megi@xff.cz>
---
 .../pinephone-pro-rk3399.c                    | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/board/pine64/pinephone-pro-rk3399/pinephone-pro-rk3399.c b/board/pine64/pinephone-pro-rk3399/pinephone-pro-rk3399.c
index 0bcb73131be..12869c9fcc8 100644
--- a/board/pine64/pinephone-pro-rk3399/pinephone-pro-rk3399.c
+++ b/board/pine64/pinephone-pro-rk3399/pinephone-pro-rk3399.c
@@ -6,6 +6,9 @@
 #include <dm.h>
 #include <fdt_support.h>
 #include <linux/libfdt.h>
+#include <linux/delay.h>
+#include <power/rk8xx_pmic.h>
+#include <power/pmic.h>
 
 #ifdef CONFIG_OF_BOARD_SETUP
 int ft_board_setup(void *blob, struct bd_info *bd)
@@ -20,3 +23,23 @@ int ft_board_setup(void *blob, struct bd_info *bd)
 	return 0;
 }
 #endif
+
+int board_early_init_r(void)
+{
+	struct udevice *pmic = NULL;
+	int ret;
+
+	ret = uclass_first_device_err(UCLASS_PMIC, &pmic);
+	if (ret) {
+		printf("ERROR: PMIC not found! (%d)\n", ret);
+		return ret;
+	}
+
+	/*
+	 * Raise LDO2 voltage to 3V (needed for touch controller)
+	 */
+	pmic_reg_write(pmic, 0x3d, 0x0c);
+	udelay(2000);
+
+	return 0;
+}