From: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
commit d6b82dafd17db0658f089b9cdec573982ca82bc5 upstream.
During probe, the TCPC alert interrupts are getting masked to
avoid unwanted interrupts during chip setup: this is ok to do
but there is no unmasking happening at any later time, which
means that the chip will not raise any interrupt, essentially
making it not functional as, while internally it does perform
all of the intended functions, it won't signal anything to the
outside.
Unmask the alert interrupts to fix functionality.
Fixes: ce08eaeb6388 ("staging: typec: rt1711h typec chip driver")
Cc: stable <stable@xxxxxxxxxx>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20250219114700.41700-1-angelogioacchino.delregno@xxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/typec/tcpm/tcpci_rt1711h.c | 11 +++++++++++
1 file changed, 11 insertions(+)
--- a/drivers/usb/typec/tcpm/tcpci_rt1711h.c
+++ b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
@@ -217,6 +217,11 @@ static int rt1711h_probe(struct i2c_clie
{
int ret;
struct rt1711h_chip *chip;
+ const u16 alert_mask = TCPC_ALERT_TX_SUCCESS | TCPC_ALERT_TX_DISCARDED |
+ TCPC_ALERT_TX_FAILED | TCPC_ALERT_RX_HARD_RST |
+ TCPC_ALERT_RX_STATUS | TCPC_ALERT_POWER_STATUS |
+ TCPC_ALERT_CC_STATUS | TCPC_ALERT_RX_BUF_OVF |
+ TCPC_ALERT_FAULT;
ret = rt1711h_check_revision(client);
if (ret < 0) {
@@ -258,6 +263,12 @@ static int rt1711h_probe(struct i2c_clie
dev_name(chip->dev), chip);
if (ret < 0)
return ret;
+
+ /* Enable alert interrupts */
+ ret = rt1711h_write16(chip, TCPC_ALERT_MASK, alert_mask);
+ if (ret < 0)
+ return ret;
+
enable_irq_wake(client->irq);
return 0;
Patches currently in stable-queue which might be from angelogioacchino.delregno@xxxxxxxxxxxxx are
queue-5.4/arm64-dts-mediatek-mt8173-evb-fix-mt6397-pmic-sub-no.patch
queue-5.4/usb-typec-tcpci_rt1711h-unmask-alert-interrupts-to-fix-functionality.patch
queue-5.4/arm64-dts-mediatek-mt8173-evb-drop-regulator-compati.patch
