From 23bc9d31c3c374ac731291ecfda2959e52fbb92e Mon Sep 17 00:00:00 2001
From: Wyon Bi <bivvy.bi@rock-chips.com>
Date: Sat, 6 May 2023 08:41:09 +0000
Subject: [PATCH] mfd: max96745: Add pwdnb GPIO support

Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com>
Change-Id: I1e19c365325196c3d6ff652079db2f816f31f4ad
---
 drivers/mfd/max96745.c       | 14 ++++++++++++++
 include/linux/mfd/max96745.h |  1 +
 2 files changed, 15 insertions(+)

diff --git a/drivers/mfd/max96745.c b/drivers/mfd/max96745.c
index c212aa5edccb..f65ba34a3b22 100644
--- a/drivers/mfd/max96745.c
+++ b/drivers/mfd/max96745.c
@@ -108,6 +108,9 @@ static void max96745_power_off(void *data)
 {
 	struct max96745 *max96745 = data;
 
+	if (max96745->pwdnb_gpio)
+		gpiod_direction_output(max96745->pwdnb_gpio, 1);
+
 	if (max96745->enable_gpio)
 		gpiod_direction_output(max96745->enable_gpio, 0);
 }
@@ -124,6 +127,11 @@ static void max96745_power_on(struct max96745 *max96745)
 		msleep(200);
 	}
 
+	if (max96745->pwdnb_gpio) {
+		gpiod_direction_output(max96745->pwdnb_gpio, 0);
+		msleep(30);
+	}
+
 	/* Set for I2C Fast-mode speed */
 	regmap_write(max96745->regmap, 0x0070, 0x16);
 
@@ -253,6 +261,12 @@ static int max96745_i2c_probe(struct i2c_client *client)
 		return dev_err_probe(dev, PTR_ERR(max96745->enable_gpio),
 				     "failed to get enable GPIO\n");
 
+	max96745->pwdnb_gpio = devm_gpiod_get_optional(dev, "pwdnb",
+						       GPIOD_ASIS);
+	if (IS_ERR(max96745->pwdnb_gpio))
+		return dev_err_probe(dev, PTR_ERR(max96745->pwdnb_gpio),
+				     "failed to get pwdnb GPIO\n");
+
 	max96745->extcon = devm_extcon_dev_allocate(dev, max96745_cable);
 	if (IS_ERR(max96745->extcon))
 		return dev_err_probe(dev, PTR_ERR(max96745->extcon),
diff --git a/include/linux/mfd/max96745.h b/include/linux/mfd/max96745.h
index f4784ce52284..f2159a23b2e8 100644
--- a/include/linux/mfd/max96745.h
+++ b/include/linux/mfd/max96745.h
@@ -15,6 +15,7 @@ struct max96745 {
 	struct regmap *regmap;
 	struct i2c_mux_core *muxc;
 	struct gpio_desc *enable_gpio;
+	struct gpio_desc *pwdnb_gpio;
 	struct extcon_dev *extcon;
 	bool idle_disc;
 };