58 lines
1.7 KiB
Diff
58 lines
1.7 KiB
Diff
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From 11ac6d1c7ffc68f6a88f1c1dd25eafe378727e98 Mon Sep 17 00:00:00 2001
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From: Vasily Khoruzhick <anarsoul@gmail.com>
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Date: Wed, 31 Oct 2018 19:48:25 -0700
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Subject: [PATCH 191/323] Bluetooth: hci_h5: Add support for reset GPIO
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Some boards (e.g. Pine64 and Pinebook) wire a GPIO to reset pin of
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RTL8723BS
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Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
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---
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drivers/bluetooth/hci_h5.c | 9 +++++++++
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1 file changed, 9 insertions(+)
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diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c
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index 996729e78..19c4f8a79 100644
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--- a/drivers/bluetooth/hci_h5.c
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+++ b/drivers/bluetooth/hci_h5.c
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@@ -93,6 +93,7 @@ struct h5 {
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const struct h5_vnd *vnd;
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const char *id;
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+ struct gpio_desc *reset_gpio;
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struct gpio_desc *enable_gpio;
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struct gpio_desc *device_wake_gpio;
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};
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@@ -833,6 +834,10 @@ static int h5_serdev_probe(struct serdev_device *serdev)
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if (IS_ERR(h5->device_wake_gpio))
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return PTR_ERR(h5->device_wake_gpio);
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+ h5->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
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+ if (IS_ERR(h5->reset_gpio))
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+ return PTR_ERR(h5->reset_gpio);
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+
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return hci_uart_register_device(&h5->serdev_hu, &h5p);
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}
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@@ -926,6 +931,9 @@ static void h5_btrtl_open(struct h5 *h5)
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/* The controller needs up to 500ms to wakeup */
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gpiod_set_value_cansleep(h5->enable_gpio, 1);
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+ /* Take it out of reset */
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+ gpiod_set_value_cansleep(h5->reset_gpio, 0);
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+ msleep(100);
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gpiod_set_value_cansleep(h5->device_wake_gpio, 1);
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msleep(500);
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}
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@@ -933,6 +941,7 @@ static void h5_btrtl_open(struct h5 *h5)
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static void h5_btrtl_close(struct h5 *h5)
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{
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gpiod_set_value_cansleep(h5->device_wake_gpio, 0);
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+ gpiod_set_value_cansleep(h5->reset_gpio, 1);
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gpiod_set_value_cansleep(h5->enable_gpio, 0);
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}
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--
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2.34.0
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