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([213.139.62.222]) by smtp.gmail.com with ESMTPSA id k6-20020adfe3c6000000b003196e992567sm6236955wrm.115.2023.09.23.00.40.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 23 Sep 2023 00:40:44 -0700 (PDT) From: Abdel Alkuor To: heikki.krogerus@linux.intel.com, krzysztof.kozlowski+dt@linaro.org, bryan.odonoghue@linaro.org Cc: gregkh@linuxfoundation.org, robh+dt@kernel.org, linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, conor+dt@kernel.org, ryan.eleceng@gmail.com, Abdel Alkuor Subject: [PATCH v6 06/14] USB: typec: Clear dead battery flag Date: Sat, 23 Sep 2023 03:39:51 -0400 Message-Id: <20230923073959.86660-7-alkuor@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230923073959.86660-1-alkuor@gmail.com> References: <20230923073959.86660-1-alkuor@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Abdel Alkuor Dead battery flag must be cleared after switching tps25750 to APP mode so the PD controller becomes fully functional. Signed-off-by: Abdel Alkuor --- 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 7c08669400a8..148b237d0df5 100644 --- a/drivers/usb/typec/tipd/core.c +++ b/drivers/usb/typec/tipd/core.c @@ -934,6 +934,22 @@ static int tps25750_apply_patch(struct tps6598x *tps) =20 } while (ret !=3D TPS_MODE_APP); =20 + /* + * 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 =3D 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"); =20 return 0; diff --git a/drivers/usb/typec/tipd/tps6598x.h b/drivers/usb/typec/tipd/tps= 6598x.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)) =20 /* BOOT STATUS REG*/ +#define TPS_BOOT_STATUS_DEAD_BATTERY_FLAG BIT(2) #define TPS_BOOT_STATUS_I2C_EEPROM_PRESENT BIT(3) =20 #endif /* __TPS6598X_H__ */ --=20 2.34.1