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Mon, 26 Oct 2026 10:48:42 -0700 (PDT) Received: from neuromancer ([75.28.21.198]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-4a842e89e33sm5034753fac.1.2026.10.26.10.48.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Oct 2026 10:48:41 -0700 (PDT) From: Chris Morgan To: linux-pm@vger.kernel.org Cc: linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org, maccraft123mc@gmail.com, zhangqing@rock-chips.com, zyw@rock-chips.com, sre@kernel.org, heiko@sntech.de, conor+dt@kernel.org, krzk+dt@kernel.org, robh@kernel.org, lee@kernel.org, Chris Morgan , Zetarancio Subject: [PATCH 5/5] power: supply: rk817-charger: Clear SYS_CAN_SD register by default Date: Mon, 26 Oct 2026 12:48:34 -0500 Message-ID: <20261026174834.1652309-6-macroalpha82@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261026174834.1652309-1-macroalpha82@gmail.com> References: <20261026174834.1652309-1-macroalpha82@gmail.com> X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Chris Morgan The BSP driver for the rk817 charger by default sets the SYS_CAN_SD register unless a specific attribute is set in the device tree. This register tells the PMIC that the system voltage can be shut down in battery off mode. Though the BSP sets this value by default, it also has a device tree value to override it. When this value is not set, it can result in a persistent power drain while the device is off, as observed by users. Fixes: 11cb8da0189b ("power: supply: Add charger driver for Rockchip RK817") Signed-off-by: Chris Morgan Suggested-by: Zetarancio --- drivers/power/supply/rk817_charger.c | 9 +++++++++ include/linux/mfd/rk808.h | 1 + 2 files changed, 10 insertions(+) diff --git a/drivers/power/supply/rk817_charger.c b/drivers/power/supply/rk817_charger.c index b6714d8e4fed..6971f572c68d 100644 --- a/drivers/power/supply/rk817_charger.c +++ b/drivers/power/supply/rk817_charger.c @@ -1148,6 +1148,15 @@ static int rk817_battery_init(struct rk817_charger *charger, regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_IN, RK817_USB_ILIM_EN, (0x01 << 3)); + /* + * Shutdown the system voltage in bat_off mode, unless + * gate-function-disable is set. + */ + if (!device_property_read_bool(charger->dev, + "rockchip,gate-function-disable")) + regmap_clear_bits(rk808->regmap, + RK817_PMIC_CHRG_TERM, RK817_SYS_CAN_SD); + return 0; } diff --git a/include/linux/mfd/rk808.h b/include/linux/mfd/rk808.h index 72419d311626..2bc58de53d82 100644 --- a/include/linux/mfd/rk808.h +++ b/include/linux/mfd/rk808.h @@ -1297,6 +1297,7 @@ enum rk809_reg_id { #define RK817_USB_ILIM_EN (0x01 << 3) #define RK817_USB_ILIM_SEL (0x07 << 0) #define RK817_PMIC_CHRG_TERM 0xe6 +#define RK817_SYS_CAN_SD (0x01 << 7) #define RK817_CHRG_TERM_ANA_DIG (0x01 << 2) #define RK817_CHRG_TERM_ANA_SEL (0x03 << 0) #define RK817_CHRG_EN (0x01 << 6) -- 2.53.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A0225606A31A for ; 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Mon, 26 Oct 2026 10:48:42 -0700 (PDT) Received: from neuromancer ([75.28.21.198]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-4a842e89e33sm5034753fac.1.2026.10.26.10.48.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Oct 2026 10:48:41 -0700 (PDT) From: Chris Morgan To: linux-pm@vger.kernel.org Cc: linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org, maccraft123mc@gmail.com, zhangqing@rock-chips.com, zyw@rock-chips.com, sre@kernel.org, heiko@sntech.de, conor+dt@kernel.org, krzk+dt@kernel.org, robh@kernel.org, lee@kernel.org, Chris Morgan , Zetarancio Subject: [PATCH 5/5] power: supply: rk817-charger: Clear SYS_CAN_SD register by default Date: Mon, 26 Oct 2026 12:48:34 -0500 Message-ID: <20261026174834.1652309-6-macroalpha82@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261026174834.1652309-1-macroalpha82@gmail.com> References: <20261026174834.1652309-1-macroalpha82@gmail.com> X-Archived-By: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261026_104843_871515_1B0DEA0C X-CRM114-Status: GOOD ( 14.82 ) X-Spam-Score: -1.9 (-) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-rockchip" X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 From: Chris Morgan The BSP driver for the rk817 charger by default sets the SYS_CAN_SD register unless a specific attribute is set in the device tree. This register tells the PMIC that the system voltage can be shut down in battery off mode. Though the BSP sets this value by default, it also has a device tree value to override it. When this value is not set, it can result in a persistent power drain while the device is off, as observed by users. Fixes: 11cb8da0189b ("power: supply: Add charger driver for Rockchip RK817") Signed-off-by: Chris Morgan Suggested-by: Zetarancio --- drivers/power/supply/rk817_charger.c | 9 +++++++++ include/linux/mfd/rk808.h | 1 + 2 files changed, 10 insertions(+) diff --git a/drivers/power/supply/rk817_charger.c b/drivers/power/supply/rk817_charger.c index b6714d8e4fed..6971f572c68d 100644 --- a/drivers/power/supply/rk817_charger.c +++ b/drivers/power/supply/rk817_charger.c @@ -1148,6 +1148,15 @@ static int rk817_battery_init(struct rk817_charger *charger, regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_IN, RK817_USB_ILIM_EN, (0x01 << 3)); + /* + * Shutdown the system voltage in bat_off mode, unless + * gate-function-disable is set. + */ + if (!device_property_read_bool(charger->dev, + "rockchip,gate-function-disable")) + regmap_clear_bits(rk808->regmap, + RK817_PMIC_CHRG_TERM, RK817_SYS_CAN_SD); + return 0; } diff --git a/include/linux/mfd/rk808.h b/include/linux/mfd/rk808.h index 72419d311626..2bc58de53d82 100644 --- a/include/linux/mfd/rk808.h +++ b/include/linux/mfd/rk808.h @@ -1297,6 +1297,7 @@ enum rk809_reg_id { #define RK817_USB_ILIM_EN (0x01 << 3) #define RK817_USB_ILIM_SEL (0x07 << 0) #define RK817_PMIC_CHRG_TERM 0xe6 +#define RK817_SYS_CAN_SD (0x01 << 7) #define RK817_CHRG_TERM_ANA_DIG (0x01 << 2) #define RK817_CHRG_TERM_ANA_SEL (0x03 << 0) #define RK817_CHRG_EN (0x01 << 6) -- 2.53.0 _______________________________________________ Linux-rockchip mailing list Linux-rockchip@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-rockchip