diff options
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/Kconfig | 5 | ||||
| -rw-r--r-- | drivers/hwmon/max1111.c | 74 |
2 files changed, 70 insertions, 9 deletions
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 8343cadd6632..41e311386e89 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -770,10 +770,11 @@ config SENSORS_LM95245 will be called lm95245. config SENSORS_MAX1111 - tristate "Maxim MAX1111 Multichannel, Serial 8-bit ADC chip" + tristate "Maxim MAX1111 Serial 8-bit ADC chip and compatibles" depends on SPI_MASTER help - Say y here to support Maxim's MAX1111 ADC chips. + Say y here to support Maxim's MAX1110, MAX1111, MAX1112, and MAX1113 + ADC chips. This driver can also be built as a module. If so, the module will be called max1111. diff --git a/drivers/hwmon/max1111.c b/drivers/hwmon/max1111.c index f3978a46e844..b4eb0889c465 100644 --- a/drivers/hwmon/max1111.c +++ b/drivers/hwmon/max1111.c @@ -22,6 +22,8 @@ #include <linux/spi/spi.h> #include <linux/slab.h> +enum chips { max1110, max1111, max1112, max1113 }; + #define MAX1111_TX_BUF_SIZE 1 #define MAX1111_RX_BUF_SIZE 2 @@ -30,6 +32,7 @@ #define MAX1111_CTRL_PD1 (1u << 1) #define MAX1111_CTRL_SGL (1u << 2) #define MAX1111_CTRL_UNI (1u << 3) +#define MAX1110_CTRL_SEL_SH (4) #define MAX1111_CTRL_SEL_SH (5) /* NOTE: bit 4 is ignored */ #define MAX1111_CTRL_STR (1u << 7) @@ -42,6 +45,8 @@ struct max1111_data { uint8_t rx_buf[MAX1111_RX_BUF_SIZE]; struct mutex drvdata_lock; /* protect msg, xfer and buffers from multiple access */ + int sel_sh; + int lsb; }; static int max1111_read(struct device *dev, int channel) @@ -53,7 +58,7 @@ static int max1111_read(struct device *dev, int channel) /* writing to drvdata struct is not thread safe, wait on mutex */ mutex_lock(&data->drvdata_lock); - data->tx_buf[0] = (channel << MAX1111_CTRL_SEL_SH) | + data->tx_buf[0] = (channel << data->sel_sh) | MAX1111_CTRL_PD0 | MAX1111_CTRL_PD1 | MAX1111_CTRL_SGL | MAX1111_CTRL_UNI | MAX1111_CTRL_STR; @@ -93,12 +98,13 @@ EXPORT_SYMBOL(max1111_read_channel); static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "max1111\n"); + return sprintf(buf, "%s\n", to_spi_device(dev)->modalias); } static ssize_t show_adc(struct device *dev, struct device_attribute *attr, char *buf) { + struct max1111_data *data = dev_get_drvdata(dev); int channel = to_sensor_dev_attr(attr)->index; int ret; @@ -107,10 +113,10 @@ static ssize_t show_adc(struct device *dev, return ret; /* - * assume the reference voltage to be 2.048V, with an 8-bit sample, - * the LSB weight is 8mV + * Assume the reference voltage to be 2.048V or 4.096V, with an 8-bit + * sample. The LSB weight is 8mV or 16mV depending on the chip type. */ - return sprintf(buf, "%d\n", ret * 8); + return sprintf(buf, "%d\n", ret * data->lsb); } #define MAX1111_ADC_ATTR(_id) \ @@ -121,6 +127,10 @@ static MAX1111_ADC_ATTR(0); static MAX1111_ADC_ATTR(1); static MAX1111_ADC_ATTR(2); static MAX1111_ADC_ATTR(3); +static MAX1111_ADC_ATTR(4); +static MAX1111_ADC_ATTR(5); +static MAX1111_ADC_ATTR(6); +static MAX1111_ADC_ATTR(7); static struct attribute *max1111_attributes[] = { &dev_attr_name.attr, @@ -135,6 +145,18 @@ static const struct attribute_group max1111_attr_group = { .attrs = max1111_attributes, }; +static struct attribute *max1110_attributes[] = { + &sensor_dev_attr_in4_input.dev_attr.attr, + &sensor_dev_attr_in5_input.dev_attr.attr, + &sensor_dev_attr_in6_input.dev_attr.attr, + &sensor_dev_attr_in7_input.dev_attr.attr, + NULL, +}; + +static const struct attribute_group max1110_attr_group = { + .attrs = max1110_attributes, +}; + static int __devinit setup_transfer(struct max1111_data *data) { struct spi_message *m; @@ -159,6 +181,7 @@ static int __devinit setup_transfer(struct max1111_data *data) static int __devinit max1111_probe(struct spi_device *spi) { + enum chips chip = spi_get_device_id(spi)->driver_data; struct max1111_data *data; int err; @@ -174,6 +197,24 @@ static int __devinit max1111_probe(struct spi_device *spi) return -ENOMEM; } + switch (chip) { + case max1110: + data->lsb = 8; + data->sel_sh = MAX1110_CTRL_SEL_SH; + break; + case max1111: + data->lsb = 8; + data->sel_sh = MAX1111_CTRL_SEL_SH; + break; + case max1112: + data->lsb = 16; + data->sel_sh = MAX1110_CTRL_SEL_SH; + break; + case max1113: + data->lsb = 16; + data->sel_sh = MAX1111_CTRL_SEL_SH; + break; + } err = setup_transfer(data); if (err) return err; @@ -188,6 +229,14 @@ static int __devinit max1111_probe(struct spi_device *spi) dev_err(&spi->dev, "failed to create attribute group\n"); return err; } + if (chip == max1110 || chip == max1112) { + err = sysfs_create_group(&spi->dev.kobj, &max1110_attr_group); + if (err) { + dev_err(&spi->dev, + "failed to create extended attribute group\n"); + goto err_remove; + } + } data->hwmon_dev = hwmon_device_register(&spi->dev); if (IS_ERR(data->hwmon_dev)) { @@ -202,6 +251,7 @@ static int __devinit max1111_probe(struct spi_device *spi) return 0; err_remove: + sysfs_remove_group(&spi->dev.kobj, &max1110_attr_group); sysfs_remove_group(&spi->dev.kobj, &max1111_attr_group); return err; } @@ -211,16 +261,27 @@ static int __devexit max1111_remove(struct spi_device *spi) struct max1111_data *data = spi_get_drvdata(spi); hwmon_device_unregister(data->hwmon_dev); + sysfs_remove_group(&spi->dev.kobj, &max1110_attr_group); sysfs_remove_group(&spi->dev.kobj, &max1111_attr_group); mutex_destroy(&data->drvdata_lock); return 0; } +static const struct spi_device_id max1111_ids[] = { + { "max1110", max1110 }, + { "max1111", max1111 }, + { "max1112", max1112 }, + { "max1113", max1113 }, + { }, +}; +MODULE_DEVICE_TABLE(spi, max1111_ids); + static struct spi_driver max1111_driver = { .driver = { .name = "max1111", .owner = THIS_MODULE, }, + .id_table = max1111_ids, .probe = max1111_probe, .remove = __devexit_p(max1111_remove), }; @@ -228,6 +289,5 @@ static struct spi_driver max1111_driver = { module_spi_driver(max1111_driver); MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"); -MODULE_DESCRIPTION("MAX1111 ADC Driver"); +MODULE_DESCRIPTION("MAX1110/MAX1111/MAX1112/MAX1113 ADC Driver"); MODULE_LICENSE("GPL"); -MODULE_ALIAS("spi:max1111"); |