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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>
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parent
a3cb6d602a
commit
055825614c
1 changed files with 18 additions and 3 deletions
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@ -115,8 +115,9 @@ struct btmtk_hci_wmt_params {
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struct btmtkuart_dev {
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struct btmtkuart_dev {
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struct hci_dev *hdev;
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struct hci_dev *hdev;
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struct serdev_device *serdev;
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struct serdev_device *serdev;
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struct clk *clk;
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struct clk *clk;
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struct clk *osc;
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struct regulator *vcc;
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struct regulator *vcc;
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struct gpio_desc *reset;
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struct gpio_desc *reset;
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struct gpio_desc *boot;
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struct gpio_desc *boot;
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@ -912,6 +913,12 @@ static int btmtkuart_parse_dt(struct serdev_device *serdev)
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return err;
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return err;
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}
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}
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bdev->osc = devm_clk_get_optional(&serdev->dev, "osc");
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if (IS_ERR(bdev->osc)) {
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err = PTR_ERR(bdev->osc);
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return err;
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}
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bdev->boot = devm_gpiod_get_optional(&serdev->dev, "boot",
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bdev->boot = devm_gpiod_get_optional(&serdev->dev, "boot",
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GPIOD_OUT_LOW);
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GPIOD_OUT_LOW);
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if (IS_ERR(bdev->boot)) {
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if (IS_ERR(bdev->boot)) {
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@ -1006,6 +1013,10 @@ static int btmtkuart_probe(struct serdev_device *serdev)
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set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
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set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
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if (btmtkuart_is_standalone(bdev)) {
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if (btmtkuart_is_standalone(bdev)) {
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err = clk_prepare_enable(bdev->osc);
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if (err < 0)
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return err;
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if (bdev->boot) {
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if (bdev->boot) {
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gpiod_set_value_cansleep(bdev->boot, 1);
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gpiod_set_value_cansleep(bdev->boot, 1);
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} else {
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} else {
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@ -1017,8 +1028,10 @@ static int btmtkuart_probe(struct serdev_device *serdev)
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/* Power on */
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/* Power on */
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err = regulator_enable(bdev->vcc);
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err = regulator_enable(bdev->vcc);
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if (err < 0)
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if (err < 0) {
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clk_disable_unprepare(bdev->osc);
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return err;
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return err;
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}
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/* Reset if the reset-gpios is available otherwise the board
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/* Reset if the reset-gpios is available otherwise the board
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* -level design should be guaranteed.
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* -level design should be guaranteed.
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@ -1068,8 +1081,10 @@ static void btmtkuart_remove(struct serdev_device *serdev)
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struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev);
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struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev);
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struct hci_dev *hdev = bdev->hdev;
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struct hci_dev *hdev = bdev->hdev;
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if (btmtkuart_is_standalone(bdev))
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if (btmtkuart_is_standalone(bdev)) {
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regulator_disable(bdev->vcc);
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regulator_disable(bdev->vcc);
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clk_disable_unprepare(bdev->osc);
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}
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hci_unregister_dev(hdev);
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hci_unregister_dev(hdev);
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hci_free_dev(hdev);
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hci_free_dev(hdev);
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