diff options
Diffstat (limited to 'target/linux/apm821xx/patches-5.10/804-hwmon-tc654-add-thermal_cooling-device.patch')
| -rw-r--r-- | target/linux/apm821xx/patches-5.10/804-hwmon-tc654-add-thermal_cooling-device.patch | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/target/linux/apm821xx/patches-5.10/804-hwmon-tc654-add-thermal_cooling-device.patch b/target/linux/apm821xx/patches-5.10/804-hwmon-tc654-add-thermal_cooling-device.patch deleted file mode 100644 index 466507a8fb..0000000000 --- a/target/linux/apm821xx/patches-5.10/804-hwmon-tc654-add-thermal_cooling-device.patch +++ /dev/null @@ -1,166 +0,0 @@ -From 4d49367c5303e3ebd17502a45b74de280f6be539 Mon Sep 17 00:00:00 2001 -From: Christian Lamparter <chunkeey@gmail.com> -Date: Sun, 13 Feb 2022 01:47:33 +0100 -Subject: hwmon: (tc654) Add thermal_cooling device support - -Adds thermal_cooling device support to the tc654/tc655 -driver. This make it possible to integrate it into a -device-tree supported thermal-zone node as a -cooling device. - -I have been using this patch as part of the Netgear WNDR4700 -Centria NAS Router support within OpenWrt since 2016. - -Signed-off-by: Christian Lamparter <chunkeey@gmail.com> -Link: https://lore.kernel.org/r/20220213004733.2421193-1-chunkeey@gmail.com -Signed-off-by: Guenter Roeck <linux@roeck-us.net> ---- ---- a/drivers/hwmon/tc654.c -+++ b/drivers/hwmon/tc654.c -@@ -15,6 +15,7 @@ - #include <linux/module.h> - #include <linux/mutex.h> - #include <linux/slab.h> -+#include <linux/thermal.h> - #include <linux/util_macros.h> - - enum tc654_regs { -@@ -384,28 +385,20 @@ static ssize_t pwm_show(struct device *d - return sprintf(buf, "%d\n", pwm); - } - --static ssize_t pwm_store(struct device *dev, struct device_attribute *da, -- const char *buf, size_t count) -+static int _set_pwm(struct tc654_data *data, unsigned long val) - { -- struct tc654_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; -- unsigned long val; - int ret; - -- if (kstrtoul(buf, 10, &val)) -- return -EINVAL; -- if (val > 255) -- return -EINVAL; -- - mutex_lock(&data->update_lock); - -- if (val == 0) -+ if (val == 0) { - data->config |= TC654_REG_CONFIG_SDM; -- else -+ data->duty_cycle = 0; -+ } else { - data->config &= ~TC654_REG_CONFIG_SDM; -- -- data->duty_cycle = find_closest(val, tc654_pwm_map, -- ARRAY_SIZE(tc654_pwm_map)); -+ data->duty_cycle = val - 1; -+ } - - ret = i2c_smbus_write_byte_data(client, TC654_REG_CONFIG, data->config); - if (ret < 0) -@@ -416,6 +409,24 @@ static ssize_t pwm_store(struct device * - - out: - mutex_unlock(&data->update_lock); -+ return ret; -+} -+ -+static ssize_t pwm_store(struct device *dev, struct device_attribute *da, -+ const char *buf, size_t count) -+{ -+ struct tc654_data *data = dev_get_drvdata(dev); -+ unsigned long val; -+ int ret; -+ -+ if (kstrtoul(buf, 10, &val)) -+ return -EINVAL; -+ if (val > 255) -+ return -EINVAL; -+ if (val > 0) -+ val = find_closest(val, tc654_pwm_map, ARRAY_SIZE(tc654_pwm_map)) + 1; -+ -+ ret = _set_pwm(data, val); - return ret < 0 ? ret : count; - } - -@@ -448,6 +459,58 @@ static struct attribute *tc654_attrs[] = - ATTRIBUTE_GROUPS(tc654); - - /* -+ * thermal cooling device functions -+ * -+ * Account for the "ShutDown Mode (SDM)" state by offsetting -+ * the 16 PWM duty cycle states by 1. -+ * -+ * State 0 = 0% PWM | Shutdown - Fan(s) are off -+ * State 1 = 30% PWM | duty_cycle = 0 -+ * State 2 = ~35% PWM | duty_cycle = 1 -+ * [...] -+ * State 15 = ~95% PWM | duty_cycle = 14 -+ * State 16 = 100% PWM | duty_cycle = 15 -+ */ -+#define TC654_MAX_COOLING_STATE 16 -+ -+static int tc654_get_max_state(struct thermal_cooling_device *cdev, unsigned long *state) -+{ -+ *state = TC654_MAX_COOLING_STATE; -+ return 0; -+} -+ -+static int tc654_get_cur_state(struct thermal_cooling_device *cdev, unsigned long *state) -+{ -+ struct tc654_data *data = tc654_update_client(cdev->devdata); -+ -+ if (IS_ERR(data)) -+ return PTR_ERR(data); -+ -+ if (data->config & TC654_REG_CONFIG_SDM) -+ *state = 0; /* FAN is off */ -+ else -+ *state = data->duty_cycle + 1; /* offset PWM States by 1 */ -+ -+ return 0; -+} -+ -+static int tc654_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state) -+{ -+ struct tc654_data *data = tc654_update_client(cdev->devdata); -+ -+ if (IS_ERR(data)) -+ return PTR_ERR(data); -+ -+ return _set_pwm(data, clamp_val(state, 0, TC654_MAX_COOLING_STATE)); -+} -+ -+static const struct thermal_cooling_device_ops tc654_fan_cool_ops = { -+ .get_max_state = tc654_get_max_state, -+ .get_cur_state = tc654_get_cur_state, -+ .set_cur_state = tc654_set_cur_state, -+}; -+ -+/* - * device probe and removal - */ - -@@ -477,7 +540,18 @@ static int tc654_probe(struct i2c_client - hwmon_dev = - devm_hwmon_device_register_with_groups(dev, client->name, data, - tc654_groups); -- return PTR_ERR_OR_ZERO(hwmon_dev); -+ if (IS_ERR(hwmon_dev)) -+ return PTR_ERR(hwmon_dev); -+ -+ if (IS_ENABLED(CONFIG_THERMAL)) { -+ struct thermal_cooling_device *cdev; -+ -+ cdev = devm_thermal_of_cooling_device_register(dev, dev->of_node, client->name, -+ hwmon_dev, &tc654_fan_cool_ops); -+ return PTR_ERR_OR_ZERO(cdev); -+ } -+ -+ return 0; - } - - static const struct i2c_device_id tc654_id[] = { |