Convert the adm9240 driver to using regmap and add error handling. Signed-off-by: Chris Packham <chris.packham@xxxxxxxxxxxxxxxxxxx> --- drivers/hwmon/adm9240.c | 215 +++++++++++++++++++++++++--------------- 1 file changed, 136 insertions(+), 79 deletions(-) diff --git a/drivers/hwmon/adm9240.c b/drivers/hwmon/adm9240.c index 951674de0b35..f55c9409d904 100644 --- a/drivers/hwmon/adm9240.c +++ b/drivers/hwmon/adm9240.c @@ -38,6 +38,7 @@ #include <linux/err.h> #include <linux/mutex.h> #include <linux/jiffies.h> +#include <linux/regmap.h> /* Addresses to scan */ static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, @@ -123,6 +124,7 @@ static inline unsigned int AOUT_FROM_REG(u8 reg) /* per client data */ struct adm9240_data { struct i2c_client *client; + struct regmap *regmap; struct mutex update_lock; char valid; unsigned long last_updated_measure; @@ -143,55 +145,72 @@ struct adm9240_data { }; /* write new fan div, callers must hold data->update_lock */ -static void adm9240_write_fan_div(struct i2c_client *client, int nr, +static int adm9240_write_fan_div(struct adm9240_data *data, int nr, u8 fan_div) { - u8 reg, old, shift = (nr + 2) * 2; + unsigned int reg, old, shift = (nr + 2) * 2; + int err; - reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); + err = regmap_read(data->regmap, ADM9240_REG_VID_FAN_DIV, ®); + if (err < 0) + return err; old = (reg >> shift) & 3; reg &= ~(3 << shift); reg |= (fan_div << shift); - i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg); - dev_dbg(&client->dev, + err = regmap_write(data->regmap, ADM9240_REG_VID_FAN_DIV, reg); + if (err < 0) + return err; + dev_dbg(&data->client->dev, "fan%d clock divider changed from %u to %u\n", nr + 1, 1 << old, 1 << fan_div); + + return 0; } static int adm9240_update_measure(struct adm9240_data *data) { - struct i2c_client *client = data->client; + unsigned int val; + u8 regs[2]; + int err; int i; - for (i = 0; i < 6; i++) { /* read voltages */ - data->in[i] = i2c_smbus_read_byte_data(client, - ADM9240_REG_IN(i)); - } - data->alarms = i2c_smbus_read_byte_data(client, - ADM9240_REG_INT(0)) | - i2c_smbus_read_byte_data(client, - ADM9240_REG_INT(1)) << 8; + err = regmap_bulk_read(data->regmap, ADM9240_REG_IN(0), &data->in[0], 6); + if (err < 0) + return err; + err = regmap_bulk_read(data->regmap, ADM9240_REG_INT(0), ®s, 2); + if (err < 0) + return err; + + data->alarms = regs[0] | regs[1] << 8; /* * read temperature: assume temperature changes less than * 0.5'C per two measurement cycles thus ignore possible * but unlikely aliasing error on lsb reading. --Grant */ - data->temp = (i2c_smbus_read_byte_data(client, - ADM9240_REG_TEMP) << 8) | - i2c_smbus_read_byte_data(client, - ADM9240_REG_TEMP_CONF); + err = regmap_read(data->regmap, ADM9240_REG_TEMP, &val); + if (err < 0) + return err; + data->temp = val << 8; + err = regmap_read(data->regmap, ADM9240_REG_TEMP_CONF, &val); + if (err < 0) + return err; + data->temp |= val; - for (i = 0; i < 2; i++) { /* read fans */ - data->fan[i] = i2c_smbus_read_byte_data(client, - ADM9240_REG_FAN(i)); + err = regmap_bulk_read(data->regmap, ADM9240_REG_FAN(0), + &data->fan[0], 2); + if (err < 0) + return err; + for (i = 0; i < 2; i++) { /* read fans */ /* adjust fan clock divider on overflow */ if (data->valid && data->fan[i] == 255 && data->fan_div[i] < 3) { - adm9240_write_fan_div(client, i, + err = adm9240_write_fan_div(data, i, ++data->fan_div[i]); + if (err < 0) + return err; /* adjust fan_min if active, but not to 0 */ if (data->fan_min[i] < 255 && @@ -205,36 +224,45 @@ static int adm9240_update_measure(struct adm9240_data *data) static int adm9240_update_config(struct adm9240_data *data) { - struct i2c_client *client = data->client; + unsigned int val; int i; + int err; for (i = 0; i < 6; i++) { - data->in_min[i] = i2c_smbus_read_byte_data(client, - ADM9240_REG_IN_MIN(i)); - data->in_max[i] = i2c_smbus_read_byte_data(client, - ADM9240_REG_IN_MAX(i)); - } - for (i = 0; i < 2; i++) { - data->fan_min[i] = i2c_smbus_read_byte_data(client, - ADM9240_REG_FAN_MIN(i)); - } - for (i = 0; i < 2; i++) { - data->temp_max[i] = i2c_smbus_read_byte_data(client, - ADM9240_REG_TEMP_MAX(i)); + err = regmap_raw_read(data->regmap, ADM9240_REG_IN_MIN(i), + &data->in_min[i], 1); + if (err < 0) + return err; + err = regmap_raw_read(data->regmap, ADM9240_REG_IN_MAX(i), + &data->in_max[i], 1); + if (err < 0) + return err; } + err = regmap_bulk_read(data->regmap, ADM9240_REG_FAN_MIN(0), + &data->fan_min[0], 2); + if (err < 0) + return err; + err = regmap_bulk_read(data->regmap, ADM9240_REG_TEMP_MAX(0), + &data->temp_max[0], 2); + if (err < 0) + return err; /* read fan divs and 5-bit VID */ - i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); - data->fan_div[0] = (i >> 4) & 3; - data->fan_div[1] = (i >> 6) & 3; - data->vid = i & 0x0f; - data->vid |= (i2c_smbus_read_byte_data(client, - ADM9240_REG_VID4) & 1) << 4; + err = regmap_read(data->regmap, ADM9240_REG_VID_FAN_DIV, &val); + if (err < 0) + return err; + data->fan_div[0] = (val >> 4) & 3; + data->fan_div[1] = (val >> 6) & 3; + data->vid = val & 0x0f; + err = regmap_read(data->regmap, ADM9240_REG_VID4, &val); + if (err < 0) + return err; + data->vid |= (val & 1) << 4; /* read analog out */ - data->aout = i2c_smbus_read_byte_data(client, - ADM9240_REG_ANALOG_OUT); + err = regmap_raw_read(data->regmap, ADM9240_REG_ANALOG_OUT, + &data->aout, 1); - return 0; + return err; } static struct adm9240_data *adm9240_update_device(struct device *dev) @@ -303,7 +331,6 @@ static ssize_t max_store(struct device *dev, struct device_attribute *devattr, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adm9240_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; long val; int err; @@ -313,10 +340,10 @@ static ssize_t max_store(struct device *dev, struct device_attribute *devattr, mutex_lock(&data->update_lock); data->temp_max[attr->index] = TEMP_TO_REG(val); - i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(attr->index), - data->temp_max[attr->index]); + err = regmap_write(data->regmap, ADM9240_REG_TEMP_MAX(attr->index), + data->temp_max[attr->index]); mutex_unlock(&data->update_lock); - return count; + return err < 0 ? err : count; } static DEVICE_ATTR_RO(temp1_input); @@ -369,7 +396,6 @@ static ssize_t in_min_store(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adm9240_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; unsigned long val; int err; @@ -379,10 +405,10 @@ static ssize_t in_min_store(struct device *dev, mutex_lock(&data->update_lock); data->in_min[attr->index] = IN_TO_REG(val, attr->index); - i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index), - data->in_min[attr->index]); + err = regmap_write(data->regmap, ADM9240_REG_IN_MIN(attr->index), + data->in_min[attr->index]); mutex_unlock(&data->update_lock); - return count; + return err < 0 ? err : count; } static ssize_t in_max_store(struct device *dev, @@ -391,7 +417,6 @@ static ssize_t in_max_store(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adm9240_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; unsigned long val; int err; @@ -401,10 +426,10 @@ static ssize_t in_max_store(struct device *dev, mutex_lock(&data->update_lock); data->in_max[attr->index] = IN_TO_REG(val, attr->index); - i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index), - data->in_max[attr->index]); + err = regmap_write(data->regmap, ADM9240_REG_IN_MAX(attr->index), + data->in_max[attr->index]); mutex_unlock(&data->update_lock); - return count; + return err < 0 ? err : count; } static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0); @@ -527,13 +552,13 @@ static ssize_t fan_min_store(struct device *dev, if (new_div != data->fan_div[nr]) { data->fan_div[nr] = new_div; - adm9240_write_fan_div(client, nr, new_div); + adm9240_write_fan_div(data, nr, new_div); } - i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr), - data->fan_min[nr]); + err = regmap_write(data->regmap, ADM9240_REG_FAN_MIN(nr), + data->fan_min[nr]); mutex_unlock(&data->update_lock); - return count; + return err < 0 ? err : count; } static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); @@ -607,7 +632,6 @@ static ssize_t aout_output_store(struct device *dev, const char *buf, size_t count) { struct adm9240_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; long val; int err; @@ -617,9 +641,9 @@ static ssize_t aout_output_store(struct device *dev, mutex_lock(&data->update_lock); data->aout = AOUT_TO_REG(val); - i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout); + err = regmap_write(data->regmap, ADM9240_REG_ANALOG_OUT, data->aout); mutex_unlock(&data->update_lock); - return count; + return err < 0 ? err : count; } static DEVICE_ATTR_RW(aout_output); @@ -627,17 +651,19 @@ static ssize_t alarm_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct adm9240_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; unsigned long val; + int err; if (kstrtoul(buf, 10, &val) || val != 0) return -EINVAL; mutex_lock(&data->update_lock); - i2c_smbus_write_byte_data(client, ADM9240_REG_CHASSIS_CLEAR, 0x80); + err = regmap_write(data->regmap, ADM9240_REG_CHASSIS_CLEAR, 0x80); data->valid = 0; /* Force cache refresh */ mutex_unlock(&data->update_lock); - dev_dbg(&client->dev, "chassis intrusion latch cleared\n"); + if (err < 0) + return err; + dev_dbg(&data->client->dev, "chassis intrusion latch cleared\n"); return count; } @@ -736,11 +762,18 @@ static int adm9240_detect(struct i2c_client *new_client, return 0; } -static void adm9240_init_client(struct i2c_client *client) +static int adm9240_init_client(struct i2c_client *client, struct adm9240_data *data) { - struct adm9240_data *data = i2c_get_clientdata(client); - u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG); - u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3; + u8 conf, mode; + int err; + + err = regmap_raw_read(data->regmap, ADM9240_REG_CONFIG, &conf, 1); + if (err < 0) + return err; + err = regmap_raw_read(data->regmap, ADM9240_REG_TEMP_CONF, &mode, 1); + if (err < 0) + return err; + mode &= 3; data->vrm = vid_which_vrm(); /* need this to report vid as mV */ @@ -756,44 +789,68 @@ static void adm9240_init_client(struct i2c_client *client) int i; for (i = 0; i < 6; i++) { - i2c_smbus_write_byte_data(client, - ADM9240_REG_IN_MIN(i), 0); - i2c_smbus_write_byte_data(client, - ADM9240_REG_IN_MAX(i), 255); + err = regmap_write(data->regmap, + ADM9240_REG_IN_MIN(i), 0); + if (err < 0) + return err; + err = regmap_write(data->regmap, + ADM9240_REG_IN_MAX(i), 255); + if (err < 0) + return err; } for (i = 0; i < 2; i++) { - i2c_smbus_write_byte_data(client, + err = regmap_write(data->regmap, ADM9240_REG_FAN_MIN(i), 255); + if (err < 0) + return err; } for (i = 0; i < 2; i++) { - i2c_smbus_write_byte_data(client, + err = regmap_write(data->regmap, ADM9240_REG_TEMP_MAX(i), 127); + if (err < 0) + return err; } /* start measurement cycle */ - i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1); + err = regmap_write(data->regmap, ADM9240_REG_CONFIG, 1); + if (err < 0) + return err; dev_info(&client->dev, "cold start: config was 0x%02x mode %u\n", conf, mode); } + + return 0; } +static const struct regmap_config adm9240_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .use_single_read = true, + .use_single_write = true, +}; + static int adm9240_probe(struct i2c_client *new_client, const struct i2c_device_id *id) { struct device *dev = &new_client->dev; struct device *hwmon_dev; struct adm9240_data *data; + int err; data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; - i2c_set_clientdata(new_client, data); data->client = new_client; mutex_init(&data->update_lock); + data->regmap = devm_regmap_init_i2c(new_client, &adm9240_regmap_config); + if (IS_ERR(data->regmap)) + return PTR_ERR(data->regmap); - adm9240_init_client(new_client); + err = adm9240_init_client(new_client, data); + if (err < 0) + return err; hwmon_dev = devm_hwmon_device_register_with_groups(dev, new_client->name, -- 2.28.0