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 b56a0880a0441695e022c2444fd565e1943eca5d..76ab5eb6d7f2bc837e0e1b0b69e8a8e2b77345ea 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;