usb: typec: tcpci_rt1711h: Unmask alert interrupts to fix functionality

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@kernel.org>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20250219114700.41700-1-angelogioacchino.delregno@collabora.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/typec/tcpm/tcpci_rt1711h.c b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
index 3291ca4948da7861cc2f540deb79b6f2a5465272..9df13ce036c6d84043ccc35514e89369695cb90a 100644 (file)
--- 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_client *client,
 {
        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_client *client,
                                        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;