diff options
Diffstat (limited to 'drivers/hwmon/ntc_thermistor.c')
| -rw-r--r-- | drivers/hwmon/ntc_thermistor.c | 216 |
1 files changed, 108 insertions, 108 deletions
diff --git a/drivers/hwmon/ntc_thermistor.c b/drivers/hwmon/ntc_thermistor.c index d399197655e6..d6d640a733d5 100644 --- a/drivers/hwmon/ntc_thermistor.c +++ b/drivers/hwmon/ntc_thermistor.c @@ -40,7 +40,7 @@ #include <linux/hwmon-sysfs.h> struct ntc_compensation { - int temp_C; + int temp_c; unsigned int ohm; }; @@ -60,76 +60,76 @@ static const struct platform_device_id ntc_thermistor_id[] = { * Thermistors Datasheet */ static const struct ntc_compensation ncpXXwb473[] = { - { .temp_C = -40, .ohm = 1747920 }, - { .temp_C = -35, .ohm = 1245428 }, - { .temp_C = -30, .ohm = 898485 }, - { .temp_C = -25, .ohm = 655802 }, - { .temp_C = -20, .ohm = 483954 }, - { .temp_C = -15, .ohm = 360850 }, - { .temp_C = -10, .ohm = 271697 }, - { .temp_C = -5, .ohm = 206463 }, - { .temp_C = 0, .ohm = 158214 }, - { .temp_C = 5, .ohm = 122259 }, - { .temp_C = 10, .ohm = 95227 }, - { .temp_C = 15, .ohm = 74730 }, - { .temp_C = 20, .ohm = 59065 }, - { .temp_C = 25, .ohm = 47000 }, - { .temp_C = 30, .ohm = 37643 }, - { .temp_C = 35, .ohm = 30334 }, - { .temp_C = 40, .ohm = 24591 }, - { .temp_C = 45, .ohm = 20048 }, - { .temp_C = 50, .ohm = 16433 }, - { .temp_C = 55, .ohm = 13539 }, - { .temp_C = 60, .ohm = 11209 }, - { .temp_C = 65, .ohm = 9328 }, - { .temp_C = 70, .ohm = 7798 }, - { .temp_C = 75, .ohm = 6544 }, - { .temp_C = 80, .ohm = 5518 }, - { .temp_C = 85, .ohm = 4674 }, - { .temp_C = 90, .ohm = 3972 }, - { .temp_C = 95, .ohm = 3388 }, - { .temp_C = 100, .ohm = 2902 }, - { .temp_C = 105, .ohm = 2494 }, - { .temp_C = 110, .ohm = 2150 }, - { .temp_C = 115, .ohm = 1860 }, - { .temp_C = 120, .ohm = 1615 }, - { .temp_C = 125, .ohm = 1406 }, + { .temp_c = -40, .ohm = 1747920 }, + { .temp_c = -35, .ohm = 1245428 }, + { .temp_c = -30, .ohm = 898485 }, + { .temp_c = -25, .ohm = 655802 }, + { .temp_c = -20, .ohm = 483954 }, + { .temp_c = -15, .ohm = 360850 }, + { .temp_c = -10, .ohm = 271697 }, + { .temp_c = -5, .ohm = 206463 }, + { .temp_c = 0, .ohm = 158214 }, + { .temp_c = 5, .ohm = 122259 }, + { .temp_c = 10, .ohm = 95227 }, + { .temp_c = 15, .ohm = 74730 }, + { .temp_c = 20, .ohm = 59065 }, + { .temp_c = 25, .ohm = 47000 }, + { .temp_c = 30, .ohm = 37643 }, + { .temp_c = 35, .ohm = 30334 }, + { .temp_c = 40, .ohm = 24591 }, + { .temp_c = 45, .ohm = 20048 }, + { .temp_c = 50, .ohm = 16433 }, + { .temp_c = 55, .ohm = 13539 }, + { .temp_c = 60, .ohm = 11209 }, + { .temp_c = 65, .ohm = 9328 }, + { .temp_c = 70, .ohm = 7798 }, + { .temp_c = 75, .ohm = 6544 }, + { .temp_c = 80, .ohm = 5518 }, + { .temp_c = 85, .ohm = 4674 }, + { .temp_c = 90, .ohm = 3972 }, + { .temp_c = 95, .ohm = 3388 }, + { .temp_c = 100, .ohm = 2902 }, + { .temp_c = 105, .ohm = 2494 }, + { .temp_c = 110, .ohm = 2150 }, + { .temp_c = 115, .ohm = 1860 }, + { .temp_c = 120, .ohm = 1615 }, + { .temp_c = 125, .ohm = 1406 }, }; static const struct ntc_compensation ncpXXwl333[] = { - { .temp_C = -40, .ohm = 1610154 }, - { .temp_C = -35, .ohm = 1130850 }, - { .temp_C = -30, .ohm = 802609 }, - { .temp_C = -25, .ohm = 575385 }, - { .temp_C = -20, .ohm = 416464 }, - { .temp_C = -15, .ohm = 304219 }, - { .temp_C = -10, .ohm = 224193 }, - { .temp_C = -5, .ohm = 166623 }, - { .temp_C = 0, .ohm = 124850 }, - { .temp_C = 5, .ohm = 94287 }, - { .temp_C = 10, .ohm = 71747 }, - { .temp_C = 15, .ohm = 54996 }, - { .temp_C = 20, .ohm = 42455 }, - { .temp_C = 25, .ohm = 33000 }, - { .temp_C = 30, .ohm = 25822 }, - { .temp_C = 35, .ohm = 20335 }, - { .temp_C = 40, .ohm = 16115 }, - { .temp_C = 45, .ohm = 12849 }, - { .temp_C = 50, .ohm = 10306 }, - { .temp_C = 55, .ohm = 8314 }, - { .temp_C = 60, .ohm = 6746 }, - { .temp_C = 65, .ohm = 5503 }, - { .temp_C = 70, .ohm = 4513 }, - { .temp_C = 75, .ohm = 3721 }, - { .temp_C = 80, .ohm = 3084 }, - { .temp_C = 85, .ohm = 2569 }, - { .temp_C = 90, .ohm = 2151 }, - { .temp_C = 95, .ohm = 1809 }, - { .temp_C = 100, .ohm = 1529 }, - { .temp_C = 105, .ohm = 1299 }, - { .temp_C = 110, .ohm = 1108 }, - { .temp_C = 115, .ohm = 949 }, - { .temp_C = 120, .ohm = 817 }, - { .temp_C = 125, .ohm = 707 }, + { .temp_c = -40, .ohm = 1610154 }, + { .temp_c = -35, .ohm = 1130850 }, + { .temp_c = -30, .ohm = 802609 }, + { .temp_c = -25, .ohm = 575385 }, + { .temp_c = -20, .ohm = 416464 }, + { .temp_c = -15, .ohm = 304219 }, + { .temp_c = -10, .ohm = 224193 }, + { .temp_c = -5, .ohm = 166623 }, + { .temp_c = 0, .ohm = 124850 }, + { .temp_c = 5, .ohm = 94287 }, + { .temp_c = 10, .ohm = 71747 }, + { .temp_c = 15, .ohm = 54996 }, + { .temp_c = 20, .ohm = 42455 }, + { .temp_c = 25, .ohm = 33000 }, + { .temp_c = 30, .ohm = 25822 }, + { .temp_c = 35, .ohm = 20335 }, + { .temp_c = 40, .ohm = 16115 }, + { .temp_c = 45, .ohm = 12849 }, + { .temp_c = 50, .ohm = 10306 }, + { .temp_c = 55, .ohm = 8314 }, + { .temp_c = 60, .ohm = 6746 }, + { .temp_c = 65, .ohm = 5503 }, + { .temp_c = 70, .ohm = 4513 }, + { .temp_c = 75, .ohm = 3721 }, + { .temp_c = 80, .ohm = 3084 }, + { .temp_c = 85, .ohm = 2569 }, + { .temp_c = 90, .ohm = 2151 }, + { .temp_c = 95, .ohm = 1809 }, + { .temp_c = 100, .ohm = 1529 }, + { .temp_c = 105, .ohm = 1299 }, + { .temp_c = 110, .ohm = 1108 }, + { .temp_c = 115, .ohm = 949 }, + { .temp_c = 120, .ohm = 817 }, + { .temp_c = 125, .ohm = 707 }, }; struct ntc_data { @@ -155,7 +155,7 @@ static int ntc_adc_iio_read(struct ntc_thermistor_platform_data *pdata) } /* unit: mV */ - result = pdata->pullup_uV * val; + result = pdata->pullup_uv * val; result >>= 12; return result; @@ -194,7 +194,7 @@ ntc_thermistor_parse_dt(struct platform_device *pdev) if (IS_ERR(chan)) return ERR_CAST(chan); - if (of_property_read_u32(np, "pullup-uv", &pdata->pullup_uV)) + if (of_property_read_u32(np, "pullup-uv", &pdata->pullup_uv)) return ERR_PTR(-ENODEV); if (of_property_read_u32(np, "pullup-ohm", &pdata->pullup_ohm)) return ERR_PTR(-ENODEV); @@ -207,7 +207,7 @@ ntc_thermistor_parse_dt(struct platform_device *pdev) pdata->connect = NTC_CONNECTED_GROUND; pdata->chan = chan; - pdata->read_uV = ntc_adc_iio_read; + pdata->read_uv = ntc_adc_iio_read; return pdata; } @@ -236,37 +236,37 @@ static inline u64 div64_u64_safe(u64 dividend, u64 divisor) return div64_u64(dividend, divisor); } -static int get_ohm_of_thermistor(struct ntc_data *data, unsigned int uV) +static int get_ohm_of_thermistor(struct ntc_data *data, unsigned int uv) { struct ntc_thermistor_platform_data *pdata = data->pdata; - u64 mV = uV / 1000; - u64 pmV = pdata->pullup_uV / 1000; - u64 N, puO, pdO; - puO = pdata->pullup_ohm; - pdO = pdata->pulldown_ohm; + u64 mv = uv / 1000; + u64 pmv = pdata->pullup_uv / 1000; + u64 n, puo, pdo; + puo = pdata->pullup_ohm; + pdo = pdata->pulldown_ohm; - if (mV == 0) { + if (mv == 0) { if (pdata->connect == NTC_CONNECTED_POSITIVE) return INT_MAX; return 0; } - if (mV >= pmV) + if (mv >= pmv) return (pdata->connect == NTC_CONNECTED_POSITIVE) ? 0 : INT_MAX; - if (pdata->connect == NTC_CONNECTED_POSITIVE && puO == 0) - N = div64_u64_safe(pdO * (pmV - mV), mV); - else if (pdata->connect == NTC_CONNECTED_GROUND && pdO == 0) - N = div64_u64_safe(puO * mV, pmV - mV); + if (pdata->connect == NTC_CONNECTED_POSITIVE && puo == 0) + n = div64_u64_safe(pdo * (pmv - mv), mv); + else if (pdata->connect == NTC_CONNECTED_GROUND && pdo == 0) + n = div64_u64_safe(puo * mv, pmv - mv); else if (pdata->connect == NTC_CONNECTED_POSITIVE) - N = div64_u64_safe(pdO * puO * (pmV - mV), - puO * mV - pdO * (pmV - mV)); + n = div64_u64_safe(pdo * puo * (pmv - mv), + puo * mv - pdo * (pmv - mv)); else - N = div64_u64_safe(pdO * puO * mV, pdO * (pmV - mV) - puO * mV); + n = div64_u64_safe(pdo * puo * mv, pdo * (pmv - mv) - puo * mv); - if (N > INT_MAX) - N = INT_MAX; - return N; + if (n > INT_MAX) + n = INT_MAX; + return n; } static void lookup_comp(struct ntc_data *data, unsigned int ohm, @@ -335,7 +335,7 @@ static void lookup_comp(struct ntc_data *data, unsigned int ohm, *i_high = end - 1; } -static int get_temp_mC(struct ntc_data *data, unsigned int ohm) +static int get_temp_mc(struct ntc_data *data, unsigned int ohm) { int low, high; int temp; @@ -343,10 +343,10 @@ static int get_temp_mC(struct ntc_data *data, unsigned int ohm) lookup_comp(data, ohm, &low, &high); if (low == high) { /* Unable to use linear approximation */ - temp = data->comp[low].temp_C * 1000; + temp = data->comp[low].temp_c * 1000; } else { - temp = data->comp[low].temp_C * 1000 + - ((data->comp[high].temp_C - data->comp[low].temp_C) * + temp = data->comp[low].temp_c * 1000 + + ((data->comp[high].temp_c - data->comp[low].temp_c) * 1000 * ((int)ohm - (int)data->comp[low].ohm)) / ((int)data->comp[high].ohm - (int)data->comp[low].ohm); } @@ -355,16 +355,16 @@ static int get_temp_mC(struct ntc_data *data, unsigned int ohm) static int ntc_thermistor_get_ohm(struct ntc_data *data) { - int read_uV; + int read_uv; if (data->pdata->read_ohm) return data->pdata->read_ohm(); - if (data->pdata->read_uV) { - read_uV = data->pdata->read_uV(data->pdata); - if (read_uV < 0) - return read_uV; - return get_ohm_of_thermistor(data, read_uV); + if (data->pdata->read_uv) { + read_uv = data->pdata->read_uv(data->pdata); + if (read_uv < 0) + return read_uv; + return get_ohm_of_thermistor(data, read_uv); } return -EINVAL; } @@ -393,7 +393,7 @@ static ssize_t ntc_show_temp(struct device *dev, if (ohm < 0) return ohm; - return sprintf(buf, "%d\n", get_temp_mC(data, ohm)); + return sprintf(buf, "%d\n", get_temp_mc(data, ohm)); } static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO, ntc_show_type, NULL, 0); @@ -432,19 +432,19 @@ static int ntc_thermistor_probe(struct platform_device *pdev) } /* Either one of the two is required. */ - if (!pdata->read_uV && !pdata->read_ohm) { + if (!pdata->read_uv && !pdata->read_ohm) { dev_err(&pdev->dev, - "Both read_uV and read_ohm missing. Need either one of the two.\n"); + "Both read_uv and read_ohm missing. Need either one of the two.\n"); return -EINVAL; } - if (pdata->read_uV && pdata->read_ohm) { + if (pdata->read_uv && pdata->read_ohm) { dev_warn(&pdev->dev, - "Only one of read_uV and read_ohm is needed; ignoring read_uV.\n"); - pdata->read_uV = NULL; + "Only one of read_uv and read_ohm is needed; ignoring read_uv.\n"); + pdata->read_uv = NULL; } - if (pdata->read_uV && (pdata->pullup_uV == 0 || + if (pdata->read_uv && (pdata->pullup_uv == 0 || (pdata->pullup_ohm == 0 && pdata->connect == NTC_CONNECTED_GROUND) || (pdata->pulldown_ohm == 0 && pdata->connect == @@ -452,7 +452,7 @@ static int ntc_thermistor_probe(struct platform_device *pdev) (pdata->connect != NTC_CONNECTED_POSITIVE && pdata->connect != NTC_CONNECTED_GROUND))) { dev_err(&pdev->dev, - "Required data to use read_uV not supplied.\n"); + "Required data to use read_uv not supplied.\n"); return -EINVAL; } |