diff options
Diffstat (limited to 'drivers/bluetooth/hci_bcm.c')
| -rw-r--r-- | drivers/bluetooth/hci_bcm.c | 41 |
1 files changed, 30 insertions, 11 deletions
diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c index ff73ecb8215f..1584c95c9c34 100644 --- a/drivers/bluetooth/hci_bcm.c +++ b/drivers/bluetooth/hci_bcm.c @@ -71,8 +71,8 @@ * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power") * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up") * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down") - * @clk: clock used by Bluetooth device - * @clk_enabled: whether @clk is prepared and enabled + * @txco_clk: external reference frequency clock used by Bluetooth device + * @clk_enabled: whether @txco_clk is prepared and enabled * @init_speed: default baudrate of Bluetooth device; * the host UART is initially set to this baudrate so that * it can configure the Bluetooth device for @oper_speed @@ -102,7 +102,7 @@ struct bcm_device { int gpio_int_idx; #endif - struct clk *clk; + struct clk *txco_clk; bool clk_enabled; u32 init_speed; @@ -215,7 +215,7 @@ static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) int err; if (powered && !dev->clk_enabled) { - err = clk_prepare_enable(dev->clk); + err = clk_prepare_enable(dev->txco_clk); if (err) return err; } @@ -229,7 +229,7 @@ static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) goto err_revert_shutdown; if (!powered && dev->clk_enabled) - clk_disable_unprepare(dev->clk); + clk_disable_unprepare(dev->txco_clk); dev->clk_enabled = powered; @@ -239,7 +239,7 @@ err_revert_shutdown: dev->set_shutdown(dev, !powered); err_clk_disable: if (powered && !dev->clk_enabled) - clk_disable_unprepare(dev->clk); + clk_disable_unprepare(dev->txco_clk); return err; } @@ -896,6 +896,25 @@ static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered) return 0; } +/* Try a bunch of names for TXCO */ +static struct clk *bcm_get_txco(struct device *dev) +{ + struct clk *clk; + + /* New explicit name */ + clk = devm_clk_get(dev, "txco"); + if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) + return clk; + + /* Deprecated name */ + clk = devm_clk_get(dev, "extclk"); + if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) + return clk; + + /* Original code used no name at all */ + return devm_clk_get(dev, NULL); +} + static int bcm_get_resources(struct bcm_device *dev) { const struct dmi_system_id *dmi_id; @@ -905,15 +924,15 @@ static int bcm_get_resources(struct bcm_device *dev) if (x86_apple_machine && !bcm_apple_get_resources(dev)) return 0; - dev->clk = devm_clk_get(dev->dev, NULL); + dev->txco_clk = bcm_get_txco(dev->dev); /* Handle deferred probing */ - if (dev->clk == ERR_PTR(-EPROBE_DEFER)) - return PTR_ERR(dev->clk); + if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER)) + return PTR_ERR(dev->txco_clk); /* Ignore all other errors as before */ - if (IS_ERR(dev->clk)) - dev->clk = NULL; + if (IS_ERR(dev->txco_clk)) + dev->txco_clk = NULL; dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup", GPIOD_OUT_LOW); |