From e8a404daea8d869304fdf810ac502cda8fbb4999 Mon Sep 17 00:00:00 2001
From: Vasily Khoruzhick <anarsoul@gmail.com>
Date: Wed, 31 Oct 2018 19:48:25 -0700
Subject: [PATCH 140/146] Bluetooth: hci_h5: Add support for reset GPIO

Some boards (e.g. Pine64 and Pinebook) wire a GPIO to reset pin of
RTL8723BS

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
---
 drivers/bluetooth/hci_h5.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c
index 8eede1197cd2..6e047df4f475 100644
--- a/drivers/bluetooth/hci_h5.c
+++ b/drivers/bluetooth/hci_h5.c
@@ -107,6 +107,7 @@ struct h5 {
 	const struct h5_vnd *vnd;
 	const char *id;
 
+	struct gpio_desc *reset_gpio;
 	struct gpio_desc *enable_gpio;
 	struct gpio_desc *device_wake_gpio;
 };
@@ -831,6 +832,10 @@ static int h5_serdev_probe(struct serdev_device *serdev)
 	if (IS_ERR(h5->device_wake_gpio))
 		return PTR_ERR(h5->device_wake_gpio);
 
+	h5->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(h5->reset_gpio))
+		return PTR_ERR(h5->reset_gpio);
+
 	return hci_uart_register_device(&h5->serdev_hu, &h5p);
 }
 
@@ -897,6 +902,9 @@ static void h5_btrtl_open(struct h5 *h5)
 
 	/* The controller needs up to 500ms to wakeup */
 	gpiod_set_value_cansleep(h5->enable_gpio, 1);
+	/* Take it out of reset */
+	gpiod_set_value_cansleep(h5->reset_gpio, 0);
+	msleep(100);
 	gpiod_set_value_cansleep(h5->device_wake_gpio, 1);
 	msleep(500);
 }
@@ -904,6 +912,7 @@ static void h5_btrtl_open(struct h5 *h5)
 static void h5_btrtl_close(struct h5 *h5)
 {
 	gpiod_set_value_cansleep(h5->device_wake_gpio, 0);
+	gpiod_set_value_cansleep(h5->reset_gpio, 1);
 	gpiod_set_value_cansleep(h5->enable_gpio, 0);
 }
 
-- 
2.17.1

