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Sun, 15 Nov 2026 01:02:03 -0800 (PST) Received: from xeon ([188.163.112.62]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c5095b8651bsm291440966b.78.2026.11.15.01.02.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 15 Nov 2026 01:02:03 -0800 (PST) From: Svyatoslav Ryhel To: Liam Girdwood , Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Lee Jones , Svyatoslav Ryhel Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, mfd@lists.linux.dev Subject: [PATCH v5 5/5] mfd: max8907: Add restart handler Date: Sun, 15 Nov 2026 11:01:47 +0200 Message-ID: <20261115090147.95337-6-clamor95@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261115090147.95337-1-clamor95@gmail.com> References: <20261115090147.95337-1-clamor95@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 Add restart handler to reset hardware properly on system reboot. Signed-off-by: Svyatoslav Ryhel --- drivers/mfd/max8907.c | 17 +++++++++++++++++ include/linux/mfd/max8907.h | 1 + 2 files changed, 18 insertions(+) diff --git a/drivers/mfd/max8907.c b/drivers/mfd/max8907.c index 8412dab2133e3..b57c497334ea6 100644 --- a/drivers/mfd/max8907.c +++ b/drivers/mfd/max8907.c @@ -187,6 +187,19 @@ static int max8907_power_off(struct sys_off_data *data) return NOTIFY_DONE; } +static int max8907_restart(struct sys_off_data *data) +{ + struct max8907 *max8907 = data->cb_data; + int ret; + + ret = regmap_update_bits(max8907->regmap_gen, MAX8907_REG_RESET_CNFG, + MAX8907_MASK_SOFT_RESET, MAX8907_MASK_SOFT_RESET); + if (ret) + dev_err(max8907->dev, "failed to reset the device!\n"); + + return NOTIFY_DONE; +} + static int max8907_i2c_probe(struct i2c_client *i2c) { struct device *dev = &i2c->dev; @@ -246,6 +259,10 @@ static int max8907_i2c_probe(struct i2c_client *i2c) ret = devm_register_power_off_handler(dev, max8907_power_off, max8907); if (ret) return dev_err_probe(dev, ret, "failed to register power-off handler\n"); + + ret = devm_register_restart_handler(dev, max8907_restart, max8907); + if (ret) + return dev_err_probe(dev, ret, "failed to register restart handler\n"); } return 0; diff --git a/include/linux/mfd/max8907.h b/include/linux/mfd/max8907.h index e222250f0cc1e..025874e5f8808 100644 --- a/include/linux/mfd/max8907.h +++ b/include/linux/mfd/max8907.h @@ -164,6 +164,7 @@ #define MAX8907_MASK_OUT5V_VINEN 0x10 #define MAX8907_MASK_OUT5V_ENSRC 0x0E #define MAX8907_MASK_OUT5V_EN 0x01 +#define MAX8907_MASK_SOFT_RESET 0x20 #define MAX8907_MASK_POWER_OFF 0x40 /* Regulator IDs */ -- 2.53.0