From ed645cccc0ebc0329916b6df039dd792d9105c9d Mon Sep 17 00:00:00 2001 From: Andrey Gusakov Date: Tue, 27 Mar 2018 17:19:49 +0300 Subject: hwmon: MC13783: Add uid and die temperature sensor inputs The uid and die temperature can be read out on the ADIN7 using input mux. Map uid and die temperature sensor to channels 16 and 17. Signed-off-by: Andrey Gusakov Acked-by: Guenter Roeck Signed-off-by: Lee Jones --- drivers/hwmon/mc13783-adc.c | 60 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) (limited to 'drivers/hwmon') diff --git a/drivers/hwmon/mc13783-adc.c b/drivers/hwmon/mc13783-adc.c index 960a1db6f269..67860ad2e3d9 100644 --- a/drivers/hwmon/mc13783-adc.c +++ b/drivers/hwmon/mc13783-adc.c @@ -63,6 +63,10 @@ static int mc13783_adc_read(struct device *dev, if (ret) return ret; + /* ADIN7 subchannels */ + if (channel >= 16) + channel = 7; + channel &= 0x7; *val = (sample[channel % 4] >> (channel > 3 ? 14 : 2)) & 0x3ff; @@ -111,6 +115,57 @@ static ssize_t mc13783_adc_read_gp(struct device *dev, return sprintf(buf, "%u\n", val); } +static ssize_t mc13783_adc_read_uid(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + unsigned int val; + struct platform_device *pdev = to_platform_device(dev); + kernel_ulong_t driver_data = platform_get_device_id(pdev)->driver_data; + int ret = mc13783_adc_read(dev, devattr, &val); + + if (ret) + return ret; + + if (driver_data & MC13783_ADC_BPDIV2) + /* MC13892 have 1/2 divider, input range is [0, 4.800V] */ + val = DIV_ROUND_CLOSEST(val * 4800, 1024); + else + /* MC13783 have 0.9 divider, input range is [0, 2.555V] */ + val = DIV_ROUND_CLOSEST(val * 2555, 1024); + + return sprintf(buf, "%u\n", val); +} + +static ssize_t mc13783_adc_read_temp(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + unsigned int val; + struct platform_device *pdev = to_platform_device(dev); + kernel_ulong_t driver_data = platform_get_device_id(pdev)->driver_data; + int ret = mc13783_adc_read(dev, devattr, &val); + + if (ret) + return ret; + + if (driver_data & MC13783_ADC_BPDIV2) { + /* + * MC13892: + * Die Temperature Read Out Code at 25C 680 + * Temperature change per LSB +0.4244C + */ + ret = DIV_ROUND_CLOSEST(-2635920 + val * 4244, 10); + } else { + /* + * MC13783: + * Die Temperature Read Out Code at 25C 282 + * Temperature change per LSB -1.14C + */ + ret = 346480 - 1140 * val; + } + + return sprintf(buf, "%d\n", ret); +} + static DEVICE_ATTR_RO(name); static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, mc13783_adc_read_bp, NULL, 2); static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, mc13783_adc_read_gp, NULL, 5); @@ -124,6 +179,9 @@ static SENSOR_DEVICE_ATTR(in12_input, S_IRUGO, mc13783_adc_read_gp, NULL, 12); static SENSOR_DEVICE_ATTR(in13_input, S_IRUGO, mc13783_adc_read_gp, NULL, 13); static SENSOR_DEVICE_ATTR(in14_input, S_IRUGO, mc13783_adc_read_gp, NULL, 14); static SENSOR_DEVICE_ATTR(in15_input, S_IRUGO, mc13783_adc_read_gp, NULL, 15); +static SENSOR_DEVICE_ATTR(in16_input, S_IRUGO, mc13783_adc_read_uid, NULL, 16); +static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, + mc13783_adc_read_temp, NULL, 17); static struct attribute *mc13783_attr_base[] = { &dev_attr_name.attr, @@ -131,6 +189,8 @@ static struct attribute *mc13783_attr_base[] = { &sensor_dev_attr_in5_input.dev_attr.attr, &sensor_dev_attr_in6_input.dev_attr.attr, &sensor_dev_attr_in7_input.dev_attr.attr, + &sensor_dev_attr_in16_input.dev_attr.attr, + &sensor_dev_attr_temp1_input.dev_attr.attr, NULL }; -- cgit v1.2.3