Commit 05582561 authored by Sean Wang's avatar Sean Wang Committed by Marcel Holtmann
Browse files

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: default avatarSean Wang <sean.wang@mediatek.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent a3cb6d60

drivers/bluetooth/btmtkuart.c

+18 −3
Original line number Diff line number Diff line
@@ -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);

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