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[72.90.70.109]) by smtp.googlemail.com with ESMTPSA id d75a77b69052e-494ae528553sm72660101cf.68.2025.05.20.10.43.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 May 2025 10:43:44 -0700 (PDT) From: Job Sava Date: Tue, 20 May 2025 13:43:38 -0400 Subject: [PATCH 3/3] mfd: tps6594: Adds support for powering off the PMIC Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250520-linux-stable-tps6594-pwrbutton-v1-3-0cc5c6e0415c@criticallink.com> References: <20250520-linux-stable-tps6594-pwrbutton-v1-0-0cc5c6e0415c@criticallink.com> In-Reply-To: <20250520-linux-stable-tps6594-pwrbutton-v1-0-0cc5c6e0415c@criticallink.com> To: Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Julien Panis , Dmitry Torokhov Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, jcormier@criticallink.com, Job Sava X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1747763020; l=2125; i=jsava@criticallink.com; s=20250404; h=from:subject:message-id; bh=sl+FbGCFgUh0cLIIGBUbbIXxFtqMeN2ESuE9qcu6VlQ=; b=t9jR0ycbMi8aS67LKhkQypLvnJEh1eq1pSrZmuqhqR5yEv0sWC7On47ka8pQvbhOZbIfdEHhv i8mimht0nRfCFTDPiYI9/CSsHw8SJwGMPoMoLRk6RWyTZ95uOeiLpIP X-Developer-Key: i=jsava@criticallink.com; a=ed25519; pk=DPPriJ+pziqtCZ0EIomf/hKU23s5T1u4WOQaT8BpQSw= When the FSM_I2C_TRIGGER register's bit 0 is set it triggers TRIGGER_I2C_0 and the PMIC is transitioned to the STANDBY state (table 6-18: SLVSGG7 – DECEMBER 2023). An ON request is required to transition from STANDBY to ACTIVE. Signed-off-by: Job Sava --- drivers/mfd/tps6594-core.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/mfd/tps6594-core.c b/drivers/mfd/tps6594-core.c index 1b0b3d1bf6c4..f4c434c0d87a 100644 --- a/drivers/mfd/tps6594-core.c +++ b/drivers/mfd/tps6594-core.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include @@ -615,6 +616,19 @@ static int tps6594_enable_crc(struct tps6594 *tps) return ret; } +static int tps6594_soft_shutdown(struct tps6594 *tps) +{ + return regmap_update_bits(tps->regmap, TPS6594_REG_FSM_I2C_TRIGGERS, + TPS6594_BIT_TRIGGER_I2C(0), + TPS6594_BIT_TRIGGER_I2C(0)); +} + +static int tps6594_power_off_handler(struct sys_off_data *data) +{ + tps6594_soft_shutdown(data->cb_data); + return NOTIFY_DONE; +} + int tps6594_device_init(struct tps6594 *tps, bool enable_crc) { struct device *dev = tps->dev; @@ -623,6 +637,7 @@ int tps6594_device_init(struct tps6594 *tps, bool enable_crc) const struct mfd_cell *cells; int n_cells; bool pwr_button; + bool system_power_controller; if (enable_crc) { ret = tps6594_enable_crc(tps); @@ -681,6 +696,15 @@ int tps6594_device_init(struct tps6594 *tps, bool enable_crc) return dev_err_probe(dev, ret, "Failed to add RTC child device\n"); } + system_power_controller = of_property_read_bool(dev->of_node, "system-power-controller"); + if (system_power_controller) { + ret = devm_register_power_off_handler(tps->dev, + tps6594_power_off_handler, + tps); + if (ret) + return dev_err_probe(dev, ret, "Failed to register power-off handler\n"); + } + return 0; } EXPORT_SYMBOL_GPL(tps6594_device_init);