From e8a404daea8d869304fdf810ac502cda8fbb4999 Mon Sep 17 00:00:00 2001 From: Vasily Khoruzhick 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 --- 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