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Wysocki" , lihuisong , Guenter Roeck Subject: [PATCH RFT 3/5] hwmon: Add support for updating thermal zones Date: Fri, 23 Jan 2026 10:22:06 -0800 Message-ID: <20260123182208.2229670-4-linux@roeck-us.net> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20260123182208.2229670-1-linux@roeck-us.net> References: <20260123182208.2229670-1-linux@roeck-us.net> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Implement support for updating thermal zones. This is necessary to be able to handle updates to sysfs attribute visibility. Signed-off-by: Guenter Roeck --- drivers/hwmon/hwmon.c | 34 +++++++++++++++++++++++++++------- 1 file changed, 27 insertions(+), 7 deletions(-) diff --git a/drivers/hwmon/hwmon.c b/drivers/hwmon/hwmon.c index 1f35285ca7a0..cb89218a0b6a 100644 --- a/drivers/hwmon/hwmon.c +++ b/drivers/hwmon/hwmon.c @@ -276,7 +276,7 @@ static struct hwmon_thermal_data *hwmon_thermal_find_tz(struct device *dev, int return NULL; } -static int hwmon_thermal_register_sensors(struct device *dev) +static int hwmon_thermal_handle_sensors(struct device *dev, bool update) { struct hwmon_device *hwdev = to_hwmon_device(dev); const struct hwmon_chip_info *chip = hwdev->chip; @@ -294,22 +294,42 @@ static int hwmon_thermal_register_sensors(struct device *dev) continue; for (j = 0; info[i]->config[j]; j++) { + umode_t mode; int err; - if (!(info[i]->config[j] & HWMON_T_INPUT) || - !hwmon_is_visible(chip->ops, drvdata, hwmon_temp, - hwmon_temp_input, j)) + if (!(info[i]->config[j] & HWMON_T_INPUT)) continue; + mode = hwmon_is_visible(chip->ops, drvdata, hwmon_temp, + hwmon_temp_input, j); + if (!mode) { + struct hwmon_thermal_data *tzdata; - err = hwmon_thermal_add_sensor(dev, j); - if (err) - return err; + if (!update) + continue; + tzdata = hwmon_thermal_find_tz(dev, j); + if (tzdata) { + devm_thermal_of_zone_unregister(dev, tzdata->tzd); + devm_release_action(dev, hwmon_thermal_remove_sensor, + &tzdata->node); + } + } else { + if (!update || !hwmon_thermal_find_tz(dev, j)) { + err = hwmon_thermal_add_sensor(dev, j); + if (err) + return err; + } + } } } return 0; } +static int hwmon_thermal_register_sensors(struct device *dev) +{ + return hwmon_thermal_handle_sensors(dev, false); +} + static void hwmon_thermal_notify(struct device *dev, int index) { struct hwmon_thermal_data *tzdata = hwmon_thermal_find_tz(dev, index); -- 2.45.2