From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vasily Khoruzhick Subject: [PATCH 2/8] Bluetooth: hci_h5: Add support for reset GPIO Date: Fri, 18 Jan 2019 09:02:26 -0800 Message-ID: <20190118170232.16142-3-anarsoul@gmail.com> References: <20190118170232.16142-1-anarsoul@gmail.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20190118170232.16142-1-anarsoul@gmail.com> Sender: netdev-owner@vger.kernel.org To: "David S. Miller" , Rob Herring , Mark Rutland , Maxime Ripard , Chen-Yu Tsai , Marcel Holtmann , Johan Hedberg , Vasily Khoruzhick , netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-bluetooth@vger.kernel.org List-Id: devicetree@vger.kernel.org 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 069d1c8fde73..7ead8c3d8657 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; }; @@ -833,6 +834,10 @@ 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); } @@ -921,6 +926,9 @@ 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); } @@ -928,6 +936,7 @@ 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); } -- 2.20.1