diff options
| author |   Sean Wang <sean.wang@mediatek.com> | 2019-06-02 09:04:17 +0800 |
|---|---|---|
| committer |   Marcel Holtmann <marcel@holtmann.org> | 2019-07-06 13:00:04 +0200 |
| commit | 055825614c6b4da8c931fe1dea2f2920553f7a67 (patch) | |
| tree | 9afaece4ec99d4278dcf364bc2a17ffe480ced02 /drivers/bluetooth | |
| parent | Bluetooth: btmtkuart: add an implementation for boot-gpios property (diff) | |
| download | linux-dev-055825614c6b4da8c931fe1dea2f2920553f7a67.tar.xz linux-dev-055825614c6b4da8c931fe1dea2f2920553f7a67.zip | |
Bluetooth: btmtkuart: add an implementation for clock osc property
Some board requires explicitily control external osscilator via GPIO.
So, add an implementation of a clock property for an external oscillator
to the device.
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth')
| -rw-r--r-- | drivers/bluetooth/btmtkuart.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/drivers/bluetooth/btmtkuart.c b/drivers/bluetooth/btmtkuart.c index 1257149cfdc4..e11169ad8247 100644 --- a/drivers/bluetooth/btmtkuart.c +++ b/drivers/bluetooth/btmtkuart.c @@ -115,8 +115,9 @@ struct btmtk_hci_wmt_params { struct btmtkuart_dev { struct hci_dev *hdev; struct serdev_device *serdev; - struct clk *clk; + struct clk *clk; + struct clk *osc; struct regulator *vcc; struct gpio_desc *reset; struct gpio_desc *boot; @@ -912,6 +913,12 @@ static int btmtkuart_parse_dt(struct serdev_device *serdev) return err; } + bdev->osc = devm_clk_get_optional(&serdev->dev, "osc"); + if (IS_ERR(bdev->osc)) { + err = PTR_ERR(bdev->osc); + return err; + } + bdev->boot = devm_gpiod_get_optional(&serdev->dev, "boot", GPIOD_OUT_LOW); if (IS_ERR(bdev->boot)) { @@ -1006,6 +1013,10 @@ static int btmtkuart_probe(struct serdev_device *serdev) set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks); if (btmtkuart_is_standalone(bdev)) { + err = clk_prepare_enable(bdev->osc); + if (err < 0) + return err; + if (bdev->boot) { gpiod_set_value_cansleep(bdev->boot, 1); } else { @@ -1017,8 +1028,10 @@ static int btmtkuart_probe(struct serdev_device *serdev) /* Power on */ err = regulator_enable(bdev->vcc); - if (err < 0) + if (err < 0) { + clk_disable_unprepare(bdev->osc); return err; + } /* Reset if the reset-gpios is available otherwise the board * -level design should be guaranteed. @@ -1068,8 +1081,10 @@ static void btmtkuart_remove(struct serdev_device *serdev) struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev); struct hci_dev *hdev = bdev->hdev; - if (btmtkuart_is_standalone(bdev)) + if (btmtkuart_is_standalone(bdev)) { regulator_disable(bdev->vcc); + clk_disable_unprepare(bdev->osc); + } hci_unregister_dev(hdev); hci_free_dev(hdev); |