diff options
Diffstat (limited to 'target')
2 files changed, 453 insertions, 0 deletions
diff --git a/target/linux/apm821xx/patches-4.4/911-hwmon-lm90-split-set-and-show-temp-as-common-codes.patch b/target/linux/apm821xx/patches-4.4/911-hwmon-lm90-split-set-and-show-temp-as-common-codes.patch new file mode 100644 index 0000000000..a2e38c5c74 --- /dev/null +++ b/target/linux/apm821xx/patches-4.4/911-hwmon-lm90-split-set-and-show-temp-as-common-codes.patch @@ -0,0 +1,302 @@ +From: Wei Ni <wni@nvidia.com> +Subject: hwmon: lm90: split set and show temp as common codes + +Split set and show temp codes as common functions, so we can use +it directly when implement linux thermal framework. +And handle error return value for the lm90_select_remote_channel +and write_tempx, then set_temp8 and set_temp11 could return it +to user-space. + +Discussed in: +http://www.spinics.net/lists/linux-tegra/msg14020.html . +Applied with Jean. + +BUG=chrome-os-partner:30834 +TEST=None + +Signed-off-by: Wei Ni <wni@nvidia.com> +Signed-off-by: Jean Delvare <khali@linux-fr.org> +Reviewed-on: https://chromium-review.googlesource.com/175114 +Tested-by: Wei Ni <wni.nvidia@gmail.com> +Commit-Queue: Dylan Reid <dgreid@chromium.org> +Reviewed-by: Dylan Reid <dgreid@chromium.org> +(cherry picked from commit 614a96decdc7a3784128c9f21c5471367e2c627d) +Change-Id: Idbe3948812c6737cba94810cd147c29cc527c3cf +Reviewed-on: https://chromium-review.googlesource.com/212413 +Reviewed-by: Olof Johansson <olofj@chromium.org> +Commit-Queue: Olof Johansson <olofj@chromium.org> +--- +diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c +index c9ff08d..fb9e224 100644 +--- a/drivers/hwmon/lm90.c ++++ b/drivers/hwmon/lm90.c +@@ -473,20 +473,29 @@ + * various registers have different meanings as a result of selecting a + * non-default remote channel. + */ +-static inline void lm90_select_remote_channel(struct i2c_client *client, +- struct lm90_data *data, +- int channel) ++static inline int lm90_select_remote_channel(struct i2c_client *client, ++ struct lm90_data *data, ++ int channel) + { + u8 config; ++ int err; + + if (data->kind == max6696) { + lm90_read_reg(client, LM90_REG_R_CONFIG1, &config); + config &= ~0x08; + if (channel) + config |= 0x08; +- i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, +- config); ++ err = i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, ++ config); ++ if (err < 0) { ++ dev_err(&client->dev, ++ "Failed to select remote channel %d, err %d\n", ++ channel, err); ++ return err; ++ } + } ++ ++ return 0; + } + + /* +@@ -759,29 +768,34 @@ + * Sysfs stuff + */ + +-static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr, +- char *buf) ++static int read_temp8(struct device *dev, int index) + { +- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct lm90_data *data = lm90_update_device(dev); + int temp; + + if (data->kind == adt7461 || data->kind == tmp451) +- temp = temp_from_u8_adt7461(data, data->temp8[attr->index]); ++ temp = temp_from_u8_adt7461(data, data->temp8[index]); + else if (data->kind == max6646) +- temp = temp_from_u8(data->temp8[attr->index]); ++ temp = temp_from_u8(data->temp8[index]); + else +- temp = temp_from_s8(data->temp8[attr->index]); ++ temp = temp_from_s8(data->temp8[index]); + + /* +16 degrees offset for temp2 for the LM99 */ +- if (data->kind == lm99 && attr->index == 3) ++ if (data->kind == lm99 && index == 3) + temp += 16000; + +- return sprintf(buf, "%d\n", temp); ++ return temp; + } + +-static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr, +- const char *buf, size_t count) ++static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr, ++ char *buf) ++{ ++ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); ++ ++ return sprintf(buf, "%d\n", read_temp8(dev, attr->index)); ++} ++ ++static int write_temp8(struct device *dev, int index, long val) + { + static const u8 reg[TEMP8_REG_NUM] = { + LM90_REG_W_LOCAL_LOW, +@@ -794,10 +808,37 @@ + MAX6659_REG_W_REMOTE_EMERG, + }; + +- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct lm90_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; +- int nr = attr->index; ++ int err; ++ ++ /* +16 degrees offset for temp2 for the LM99 */ ++ if (data->kind == lm99 && index == 3) ++ val -= 16000; ++ ++ mutex_lock(&data->update_lock); ++ if (data->kind == adt7461 || data->kind == tmp451) ++ data->temp8[index] = temp_to_u8_adt7461(data, val); ++ else if (data->kind == max6646) ++ data->temp8[index] = temp_to_u8(val); ++ else ++ data->temp8[index] = temp_to_s8(val); ++ ++ if ((err = lm90_select_remote_channel(client, data, index >= 6)) || ++ (err = i2c_smbus_write_byte_data(client, reg[index], ++ data->temp8[index])) || ++ (err = lm90_select_remote_channel(client, data, 0))) ++ dev_err(dev, "write_temp8 failed, err %d\n", err); ++ mutex_unlock(&data->update_lock); ++ ++ return err; ++} ++ ++static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr, ++ const char *buf, size_t count) ++{ ++ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); ++ int index = attr->index; + long val; + int err; + +@@ -805,49 +846,41 @@ + if (err < 0) + return err; + +- /* +16 degrees offset for temp2 for the LM99 */ +- if (data->kind == lm99 && attr->index == 3) +- val -= 16000; ++ err = write_temp8(dev, index, val); ++ if (err < 0) ++ return err; + +- mutex_lock(&data->update_lock); +- if (data->kind == adt7461 || data->kind == tmp451) +- data->temp8[nr] = temp_to_u8_adt7461(data, val); +- else if (data->kind == max6646) +- data->temp8[nr] = temp_to_u8(val); +- else +- data->temp8[nr] = temp_to_s8(val); +- +- lm90_select_remote_channel(client, data, nr >= 6); +- i2c_smbus_write_byte_data(client, reg[nr], data->temp8[nr]); +- lm90_select_remote_channel(client, data, 0); +- +- mutex_unlock(&data->update_lock); + return count; ++} ++ ++static int read_temp11(struct device *dev, int index) ++{ ++ struct lm90_data *data = lm90_update_device(dev); ++ int temp; ++ ++ if (data->kind == adt7461 || data->kind == tmp451) ++ temp = temp_from_u16_adt7461(data, data->temp11[index]); ++ else if (data->kind == max6646) ++ temp = temp_from_u16(data->temp11[index]); ++ else ++ temp = temp_from_s16(data->temp11[index]); ++ ++ /* +16 degrees offset for temp2 for the LM99 */ ++ if (data->kind == lm99 && index <= 2) ++ temp += 16000; ++ ++ return temp; + } + + static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, + char *buf) + { + struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); +- struct lm90_data *data = lm90_update_device(dev); +- int temp; + +- if (data->kind == adt7461 || data->kind == tmp451) +- temp = temp_from_u16_adt7461(data, data->temp11[attr->index]); +- else if (data->kind == max6646) +- temp = temp_from_u16(data->temp11[attr->index]); +- else +- temp = temp_from_s16(data->temp11[attr->index]); +- +- /* +16 degrees offset for temp2 for the LM99 */ +- if (data->kind == lm99 && attr->index <= 2) +- temp += 16000; +- +- return sprintf(buf, "%d\n", temp); ++ return sprintf(buf, "%d\n", read_temp11(dev, attr->index)); + } + +-static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, +- const char *buf, size_t count) ++static int write_temp11(struct device *dev, int nr, int index, long val) + { + struct { + u8 high; +@@ -861,17 +894,9 @@ + { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 1 } + }; + +- struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); + struct lm90_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; +- int nr = attr->nr; +- int index = attr->index; +- long val; + int err; +- +- err = kstrtol(buf, 10, &val); +- if (err < 0) +- return err; + + /* +16 degrees offset for temp2 for the LM99 */ + if (data->kind == lm99 && index <= 2) +@@ -887,15 +912,50 @@ + else + data->temp11[index] = temp_to_s8(val) << 8; + +- lm90_select_remote_channel(client, data, reg[nr].channel); +- i2c_smbus_write_byte_data(client, reg[nr].high, +- data->temp11[index] >> 8); +- if (data->flags & LM90_HAVE_REM_LIMIT_EXT) +- i2c_smbus_write_byte_data(client, reg[nr].low, +- data->temp11[index] & 0xff); +- lm90_select_remote_channel(client, data, 0); ++ err = lm90_select_remote_channel(client, data, reg[nr].channel); ++ if (err) ++ goto error; ++ ++ err = i2c_smbus_write_byte_data(client, reg[nr].high, ++ data->temp11[index] >> 8); ++ if (err) ++ goto error; ++ ++ if (data->flags & LM90_HAVE_REM_LIMIT_EXT) { ++ err = i2c_smbus_write_byte_data(client, reg[nr].low, ++ data->temp11[index] & 0xff); ++ if (err) ++ goto error; ++ } ++ ++ err = lm90_select_remote_channel(client, data, 0); ++ ++error: ++ if (err) ++ dev_err(dev, "write_temp11 failed, err %d\n", err); + + mutex_unlock(&data->update_lock); ++ ++ return err; ++} ++ ++static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, ++ const char *buf, size_t count) ++{ ++ struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); ++ int nr = attr->nr; ++ int index = attr->index; ++ long val; ++ int err; ++ ++ err = kstrtol(buf, 10, &val); ++ if (err < 0) ++ return err; ++ ++ err = write_temp11(dev, nr, index, val); ++ if (err < 0) ++ return err; ++ + return count; + } + diff --git a/target/linux/apm821xx/patches-4.4/912-hwmon-lm90-expose-to-thermal-fw-via-DT.patch b/target/linux/apm821xx/patches-4.4/912-hwmon-lm90-expose-to-thermal-fw-via-DT.patch new file mode 100644 index 0000000000..fe7337b530 --- /dev/null +++ b/target/linux/apm821xx/patches-4.4/912-hwmon-lm90-expose-to-thermal-fw-via-DT.patch @@ -0,0 +1,151 @@ +From: Wei Ni <wni@nvidia.com> +Subject: hwmon: lm90: expose to thermal fw via DT nodes + +This patch adds to lm90 temperature sensor the possibility +to expose itself as thermal zone device, registered on the +thermal framework. + +The thermal zone is built only if a device tree node +describing a thermal zone for this sensor is present +inside the lm90 DT node. Otherwise, the driver behavior +will be the same. + +Discussed in: +http://www.gossamer-threads.com/lists/linux/kernel/1992853 + +BUG=chrome-os-partner:30834 +TEST=Verified. Build and boot up system. + +Signed-off-by: Wei Ni <wni@nvidia.com> +Reviewed-on: https://chromium-review.googlesource.com/181447 +Reviewed-by: Dylan Reid <dgreid@chromium.org> +Tested-by: Dylan Reid <dgreid@chromium.org> +Commit-Queue: Dylan Reid <dgreid@chromium.org> +Change-Id: Id356b94d7e8f4b49ec15e46b17a1fa2ff0cbf8cf +Reviewed-on: https://chromium-review.googlesource.com/212414 +Tested-by: Wei Ni <wni.nvidia@gmail.com> +Reviewed-by: Olof Johansson <olofj@chromium.org> +Commit-Queue: Olof Johansson <olofj@chromium.org> +--- +diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c +index fb9e224..c54d3c8 100644 +--- a/drivers/hwmon/lm90.c ++++ b/drivers/hwmon/lm90.c +@@ -96,6 +96,8 @@ + #include <linux/sysfs.h> + #include <linux/interrupt.h> + #include <linux/regulator/consumer.h> ++#include <linux/of.h> ++#include <linux/thermal.h> + + /* + * Addresses to scan +@@ -118,6 +120,13 @@ + + enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680, + max6646, w83l771, max6696, sa56004, g781, tmp451 }; ++ ++enum sensor_id { ++ LOCAL = 0, ++ REMOTE, ++ REMOTE2, ++ SENSOR_ID_END, ++}; + + /* + * The LM90 registers +@@ -368,6 +377,7 @@ + struct i2c_client *client; + struct device *hwmon_dev; + const struct attribute_group *groups[6]; ++ struct thermal_zone_device *tz[SENSOR_ID_END]; + struct mutex update_lock; + struct regulator *regulator; + char valid; /* zero until following fields are valid */ +@@ -878,6 +888,24 @@ + struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); + + return sprintf(buf, "%d\n", read_temp11(dev, attr->index)); ++} ++ ++static int lm90_read_local_temp(void *dev, int *temp) ++{ ++ *temp = read_temp11(dev, 4); ++ return 0; ++} ++ ++static int lm90_read_remote_temp(void *dev, int *temp) ++{ ++ *temp = read_temp11(dev, 0); ++ return 0; ++} ++ ++static int lm90_read_remote2_temp(void *dev, int *temp) ++{ ++ *temp = read_temp11(dev, 5); ++ return 0; + } + + static int write_temp11(struct device *dev, int nr, int index, long val) +@@ -1150,6 +1238,18 @@ + .attrs = lm90_temp3_attributes, + }; + ++static const struct thermal_zone_of_device_ops local_temp_sensor = { ++ .get_temp = lm90_read_local_temp, ++}; ++ ++static const struct thermal_zone_of_device_ops remote_temp_sensor = { ++ .get_temp = lm90_read_remote_temp, ++}; ++ ++static const struct thermal_zone_of_device_ops remote2_temp_sensor = { ++ .get_temp = lm90_read_remote2_temp, ++}; ++ + /* pec used for ADM1032 only */ + static ssize_t show_pec(struct device *dev, struct device_attribute *dummy, + char *buf) +@@ -1599,6 +1699,30 @@ + } + } + ++ data->tz[LOCAL] = thermal_zone_of_sensor_register(&client->dev, ++ LOCAL, ++ &client->dev, ++ &local_temp_sensor); ++ if (IS_ERR(data->tz[LOCAL])) ++ data->tz[LOCAL] = NULL; ++ ++ data->tz[REMOTE] = thermal_zone_of_sensor_register(&client->dev, ++ REMOTE, ++ &client->dev, ++ &remote_temp_sensor); ++ if (IS_ERR(data->tz[REMOTE])) ++ data->tz[REMOTE] = NULL; ++ ++ if (data->flags & LM90_HAVE_TEMP3) { ++ data->tz[REMOTE2] = thermal_zone_of_sensor_register( ++ &client->dev, ++ REMOTE2, ++ &client->dev, ++ &remote2_temp_sensor); ++ if (IS_ERR(data->tz[REMOTE2])) ++ data->tz[REMOTE2] = NULL; ++ } ++ + return 0; + + exit_unregister: +@@ -1674,8 +1726,11 @@ + + static int lm90_remove(struct i2c_client *client) + { ++ int i; + struct lm90_data *data = i2c_get_clientdata(client); + ++ for (i = 0; i < SENSOR_ID_END; i++) ++ thermal_zone_of_sensor_unregister(&client->dev, data->tz[i]); + hwmon_device_unregister(data->hwmon_dev); + device_remove_file(&client->dev, &dev_attr_pec); + lm90_restore_conf(client, data); |