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authorVenkata Lakshmi Narayana Gubba <gubbaven@codeaurora.org>2020-02-03 16:10:40 +0530
committerMarcel Holtmann <marcel@holtmann.org>2020-02-03 15:44:35 +0100
commit66cb7051356434062108b5cd74744b6473150147 (patch)
treede1ca08b5cde9d13db4c38b20bca70a39fcdd157 /drivers/bluetooth
parentfe66483156050f4eb63c4a1988f3b439e6c9ff2a (diff)
Bluetooth: hci_qca: Enable clocks required for BT SOC
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> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth')
-rw-r--r--drivers/bluetooth/hci_qca.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index d6e0c99ee5eb..eacc65b02b30 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)