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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: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Hans de Goede 2018-08-02 16:57:21 +02:00 committed by Marcel Holtmann
parent b825d7c405
commit 4c79148970
1 changed files with 41 additions and 0 deletions
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41
drivers/bluetooth/hci_h5.c
View File

@ -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