Messages in this thread Patch in this message | | | From | Abdel Alkuor <> | Subject | [PATCH v8 06/14] USB: typec: tps6598x: Clear dead battery flag | Date | Fri, 29 Sep 2023 10:30:47 -0400 |
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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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