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    Subject[PATCH v8 06/14] USB: typec: tps6598x: Clear dead battery flag
    Date
    From: Abdel Alkuor <abdelalkuor@geotab.com>

    Dead battery flag must be cleared after switching tps25750 to APP mode
    so the PD controller becomes fully functional.

    Signed-off-by: Abdel Alkuor <abdelalkuor@geotab.com>
    ---
    Changes in v8:
    - No changes
    Changes in v7:
    - Add driver name to commit subject
    Changes in v6:
    - No changes
    Changes in v5:
    - Incorporating tps25750 into tps6598x driver

    drivers/usb/typec/tipd/core.c | 16 ++++++++++++++++
    drivers/usb/typec/tipd/tps6598x.h | 1 +
    2 files changed, 17 insertions(+)

    diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
    index 21b0ea2c9627..2598433a69cf 100644
    --- a/drivers/usb/typec/tipd/core.c
    +++ b/drivers/usb/typec/tipd/core.c
    @@ -946,6 +946,22 @@ static int tps25750_apply_patch(struct tps6598x *tps)

    } while (ret != TPS_MODE_APP);

    + /*
    + * The dead battery flag may be triggered when the controller
    + * port is connected to a device that can source power and
    + * attempts to power up both the controller and the board it is on.
    + * To restore controller functionality, it is necessary to clear
    + * this flag
    + */
    + if (status & TPS_BOOT_STATUS_DEAD_BATTERY_FLAG) {
    + ret = tps6598x_exec_cmd(tps, "DBfg", 0, NULL, 0, NULL);
    + if (ret) {
    + dev_err(tps->dev,
    + "failed to clear dead battery %d\n", ret);
    + return ret;
    + }
    + }
    +
    dev_info(tps->dev, "controller switched to \"APP\" mode\n");

    return 0;
    diff --git a/drivers/usb/typec/tipd/tps6598x.h b/drivers/usb/typec/tipd/tps6598x.h
    index a80d0929f3ee..c000170f4547 100644
    --- a/drivers/usb/typec/tipd/tps6598x.h
    +++ b/drivers/usb/typec/tipd/tps6598x.h
    @@ -200,6 +200,7 @@
    #define TPS_DATA_STATUS_DP_SPEC_PIN_ASSIGNMENT_B (BIT(2) | BIT(1))

    /* BOOT STATUS REG*/
    +#define TPS_BOOT_STATUS_DEAD_BATTERY_FLAG BIT(2)
    #define TPS_BOOT_STATUS_I2C_EEPROM_PRESENT BIT(3)

    #endif /* __TPS6598X_H__ */
    --
    2.34.1
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