diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2018-08-02 16:57:21 +0200 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2018-08-03 13:27:47 +0200 |
| commit | 4c79148970fbb3cfe078d4ad31a2c7a7722196a8 (patch) | |
| tree | 9aa7645e37c846b6a238dad38a55470c1110f73f | |
| parent | b825d7c4052643a9b8a10d1c83213394f795c806 (diff) | |
| download | linux-4c79148970fbb3cfe078d4ad31a2c7a7722196a8.tar.bz2 | |
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>
| -rw-r--r-- | drivers/bluetooth/hci_h5.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c index 3513dad43f3c..63c0dcbc4914 100644 --- a/drivers/bluetooth/hci_h5.c +++ b/drivers/bluetooth/hci_h5.c @@ -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 |