diff mbox series

[v3,1/2] Bluetooth: hci_qca: Enable clocks required for BT SOC

Message ID 1580726441-1100-1-git-send-email-gubbaven@codeaurora.org
State New
Headers show
Series [v3,1/2] Bluetooth: hci_qca: Enable clocks required for BT SOC | expand

Commit Message

Venkata Lakshmi Narayana Gubba Feb. 3, 2020, 10:40 a.m. UTC 
Instead of relying on other subsytem to turn ON clocks
required for BT SoC to operate, voting them from the driver.

Signed-off-by: Venkata Lakshmi Narayana Gubba <gubbaven@codeaurora.org>
---
v3:
  *Removed the function qca_setup_clock() 
  *For enabling and disabling clocks, directly called the functions 
   clk_prepare_enable and clk_disable_unprepare respectively. 

---
 drivers/bluetooth/hci_qca.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

Comments

Marcel Holtmann Feb. 3, 2020, 2:45 p.m. UTC | #1 
Hi Venkata,

> Instead of relying on other subsytem to turn ON clocks
> required for BT SoC to operate, voting them from the driver.
> 
> Signed-off-by: Venkata Lakshmi Narayana Gubba <gubbaven@codeaurora.org>
> ---
> v3:
>  *Removed the function qca_setup_clock() 
>  *For enabling and disabling clocks, directly called the functions 
>   clk_prepare_enable and clk_disable_unprepare respectively. 
> 
> ---
> drivers/bluetooth/hci_qca.c | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)

patch has been applied to bluetooth-next tree.

Regards

Marcel
diff mbox series

Patch

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index d6e0c99..eacc65b 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1755,6 +1755,13 @@  static int qca_regulator_enable(struct qca_serdev *qcadev)
 
 	power->vregs_on = true;
 
+	ret = clk_prepare_enable(qcadev->susclk);
+	if (ret) {
+		/* Turn off regulators to overcome power leakage */
+		qca_regulator_disable(qcadev);
+		return ret;
+	}
+
 	return 0;
 }
 
@@ -1773,6 +1780,9 @@  static void qca_regulator_disable(struct qca_serdev *qcadev)
 
 	regulator_bulk_disable(power->num_vregs, power->vreg_bulk);
 	power->vregs_on = false;
+
+	if (qcadev->susclk)
+		clk_disable_unprepare(qcadev->susclk);
 }
 
 static int qca_init_regulators(struct qca_power *qca,
@@ -1839,6 +1849,12 @@  static int qca_serdev_probe(struct serdev_device *serdev)
 
 		qcadev->bt_power->vregs_on = false;
 
+		qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL);
+		if (IS_ERR(qcadev->susclk)) {
+			dev_err(&serdev->dev, "failed to acquire clk\n");
+			return PTR_ERR(qcadev->susclk);
+		}
+
 		device_property_read_u32(&serdev->dev, "max-speed",
 					 &qcadev->oper_speed);
 		if (!qcadev->oper_speed)