Commit 4c791489 authored by Hans de Goede's avatar Hans de Goede Committed by Marcel Holtmann
Browse files

Bluetooth: hci_h5: Add support for enable and device-wake GPIOs 



Add support for the enable and device-wake GPIOs used on ACPI enumerated
RTL8723BS devices.

Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent b825d7c4

drivers/bluetooth/hci_h5.c

+41 −0
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 


#include <linux/acpi.h>

#include <linux/errno.h>

#include <linux/gpio/consumer.h>

#include <linux/kernel.h>

#include <linux/mod_devicetable.h>

#include <linux/serdev.h>
@@ -105,12 +106,16 @@ struct h5 { 


	const struct h5_vnd *vnd;

	const char *id;



	struct gpio_desc *enable_gpio;

	struct gpio_desc *device_wake_gpio;

};



struct h5_vnd {

	int (*setup)(struct h5 *h5);

	void (*open)(struct h5 *h5);

	void (*close)(struct h5 *h5);

	const struct acpi_gpio_mapping *acpi_gpio_map;

};



static void h5_reset_rx(struct h5 *h5);
@@ -811,8 +816,21 @@ static int h5_serdev_probe(struct serdev_device *serdev) 


		h5->vnd = (const struct h5_vnd *)match->driver_data;

		h5->id  = (char *)match->id;



		if (h5->vnd->acpi_gpio_map)

			devm_acpi_dev_add_driver_gpios(dev,

						       h5->vnd->acpi_gpio_map);

	}



	h5->enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);

	if (IS_ERR(h5->enable_gpio))

		return PTR_ERR(h5->enable_gpio);



	h5->device_wake_gpio = devm_gpiod_get_optional(dev, "device-wake",

						       GPIOD_OUT_LOW);

	if (IS_ERR(h5->device_wake_gpio))

		return PTR_ERR(h5->device_wake_gpio);



	return hci_uart_register_device(&h5->serdev_hu, &h5p);

}
@@ -875,11 +893,34 @@ static void h5_btrtl_open(struct h5 *h5) 
	serdev_device_set_flow_control(h5->hu->serdev, false);

	serdev_device_set_parity(h5->hu->serdev, SERDEV_PARITY_EVEN);

	serdev_device_set_baudrate(h5->hu->serdev, 115200);



	/* The controller needs up to 500ms to wakeup */

	gpiod_set_value_cansleep(h5->enable_gpio, 1);

	gpiod_set_value_cansleep(h5->device_wake_gpio, 1);

	msleep(500);

}



static void h5_btrtl_close(struct h5 *h5)

{

	gpiod_set_value_cansleep(h5->device_wake_gpio, 0);

	gpiod_set_value_cansleep(h5->enable_gpio, 0);

}



static const struct acpi_gpio_params btrtl_device_wake_gpios = { 0, 0, false };

static const struct acpi_gpio_params btrtl_enable_gpios = { 1, 0, false };

static const struct acpi_gpio_params btrtl_host_wake_gpios = { 2, 0, false };

static const struct acpi_gpio_mapping acpi_btrtl_gpios[] = {

	{ "device-wake-gpios", &btrtl_device_wake_gpios, 1 },

	{ "enable-gpios", &btrtl_enable_gpios, 1 },

	{ "host-wake-gpios", &btrtl_host_wake_gpios, 1 },

	{},

};



static struct h5_vnd rtl_vnd = {

	.setup		= h5_btrtl_setup,

	.open		= h5_btrtl_open,

	.close		= h5_btrtl_close,

	.acpi_gpio_map	= acpi_btrtl_gpios,

};



#ifdef CONFIG_ACPI