Add support for the enable and device-wake GPIOs used on ACPI enumerated
RTL8723BS devices.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
drivers/bluetooth/hci_h5.c | 47 ++++++++++++++++++++++++++++++++++++--
1 file changed, 45 insertions(+), 2 deletions(-)
diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c
index d81f950cea27..177eabd00d49 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/of_device.h>
#include <linux/serdev.h>
@@ -104,12 +105,16 @@ struct h5 {
} sleep;
const struct h5_vnd *vnd;
+
+ 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_gpios;
};
static void h5_reset_rx(struct h5 *h5);
@@ -801,10 +806,25 @@ static int h5_serdev_probe(struct serdev_device *serdev)
h5->serdev_hu.serdev = serdev;
serdev_device_set_drvdata(serdev, h5);
- if (has_acpi_companion(&serdev->dev))
+ if (has_acpi_companion(&serdev->dev)) {
h5->vnd = acpi_device_get_match_data(&serdev->dev);
- else
+ if (h5->vnd && h5->vnd->acpi_gpios)
+ devm_acpi_dev_add_driver_gpios(&serdev->dev,
+ h5->vnd->acpi_gpios);
+ } else {
h5->vnd = of_device_get_match_data(&serdev->dev);
+ }
+
+ h5->enable_gpio = devm_gpiod_get_optional(&serdev->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(&serdev->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);
}
@@ -868,11 +888,34 @@ 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_gpios = acpi_btrtl_gpios,
};
#ifdef CONFIG_ACPI
--
2.17.0
--
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