#include <linux/hwmon-sysfs.h>
struct ntc_compensation {
- int temp_C;
+ int temp_c;
unsigned int ohm;
};
* 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 {
}
/* unit: mV */
- result = pdata->pullup_uV * val;
+ result = pdata->pullup_uv * val;
result >>= 12;
return result;
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);
pdata->connect = NTC_CONNECTED_GROUND;
pdata->chan = chan;
- pdata->read_uV = ntc_adc_iio_read;
+ pdata->read_uv = ntc_adc_iio_read;
return pdata;
}
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,
*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;
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);
}
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;
}
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);
}
/* 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 ==
(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;
}
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blobdiff