Lines Matching +full:pulldown +full:- +full:ohm
2 * ntc_thermistor.c - NTC Thermistors
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
40 #include <linux/hwmon-sysfs.h>
45 unsigned int ohm; member
62 * A compensation table should be sorted by the values of .ohm
68 { .temp_c = -40, .ohm = 1747920 },
69 { .temp_c = -35, .ohm = 1245428 },
70 { .temp_c = -30, .ohm = 898485 },
71 { .temp_c = -25, .ohm = 655802 },
72 { .temp_c = -20, .ohm = 483954 },
73 { .temp_c = -15, .ohm = 360850 },
74 { .temp_c = -10, .ohm = 271697 },
75 { .temp_c = -5, .ohm = 206463 },
76 { .temp_c = 0, .ohm = 158214 },
77 { .temp_c = 5, .ohm = 122259 },
78 { .temp_c = 10, .ohm = 95227 },
79 { .temp_c = 15, .ohm = 74730 },
80 { .temp_c = 20, .ohm = 59065 },
81 { .temp_c = 25, .ohm = 47000 },
82 { .temp_c = 30, .ohm = 37643 },
83 { .temp_c = 35, .ohm = 30334 },
84 { .temp_c = 40, .ohm = 24591 },
85 { .temp_c = 45, .ohm = 20048 },
86 { .temp_c = 50, .ohm = 16433 },
87 { .temp_c = 55, .ohm = 13539 },
88 { .temp_c = 60, .ohm = 11209 },
89 { .temp_c = 65, .ohm = 9328 },
90 { .temp_c = 70, .ohm = 7798 },
91 { .temp_c = 75, .ohm = 6544 },
92 { .temp_c = 80, .ohm = 5518 },
93 { .temp_c = 85, .ohm = 4674 },
94 { .temp_c = 90, .ohm = 3972 },
95 { .temp_c = 95, .ohm = 3388 },
96 { .temp_c = 100, .ohm = 2902 },
97 { .temp_c = 105, .ohm = 2494 },
98 { .temp_c = 110, .ohm = 2150 },
99 { .temp_c = 115, .ohm = 1860 },
100 { .temp_c = 120, .ohm = 1615 },
101 { .temp_c = 125, .ohm = 1406 },
104 { .temp_c = -40, .ohm = 1610154 },
105 { .temp_c = -35, .ohm = 1130850 },
106 { .temp_c = -30, .ohm = 802609 },
107 { .temp_c = -25, .ohm = 575385 },
108 { .temp_c = -20, .ohm = 416464 },
109 { .temp_c = -15, .ohm = 304219 },
110 { .temp_c = -10, .ohm = 224193 },
111 { .temp_c = -5, .ohm = 166623 },
112 { .temp_c = 0, .ohm = 124850 },
113 { .temp_c = 5, .ohm = 94287 },
114 { .temp_c = 10, .ohm = 71747 },
115 { .temp_c = 15, .ohm = 54996 },
116 { .temp_c = 20, .ohm = 42455 },
117 { .temp_c = 25, .ohm = 33000 },
118 { .temp_c = 30, .ohm = 25822 },
119 { .temp_c = 35, .ohm = 20335 },
120 { .temp_c = 40, .ohm = 16115 },
121 { .temp_c = 45, .ohm = 12849 },
122 { .temp_c = 50, .ohm = 10306 },
123 { .temp_c = 55, .ohm = 8314 },
124 { .temp_c = 60, .ohm = 6746 },
125 { .temp_c = 65, .ohm = 5503 },
126 { .temp_c = 70, .ohm = 4513 },
127 { .temp_c = 75, .ohm = 3721 },
128 { .temp_c = 80, .ohm = 3084 },
129 { .temp_c = 85, .ohm = 2569 },
130 { .temp_c = 90, .ohm = 2151 },
131 { .temp_c = 95, .ohm = 1809 },
132 { .temp_c = 100, .ohm = 1529 },
133 { .temp_c = 105, .ohm = 1299 },
134 { .temp_c = 110, .ohm = 1108 },
135 { .temp_c = 115, .ohm = 949 },
136 { .temp_c = 120, .ohm = 817 },
137 { .temp_c = 125, .ohm = 707 },
141 { .temp_c = -40, .ohm = 4397119 },
142 { .temp_c = -35, .ohm = 3088599 },
143 { .temp_c = -30, .ohm = 2197225 },
144 { .temp_c = -25, .ohm = 1581881 },
145 { .temp_c = -20, .ohm = 1151037 },
146 { .temp_c = -15, .ohm = 846579 },
147 { .temp_c = -10, .ohm = 628988 },
148 { .temp_c = -5, .ohm = 471632 },
149 { .temp_c = 0, .ohm = 357012 },
150 { .temp_c = 5, .ohm = 272500 },
151 { .temp_c = 10, .ohm = 209710 },
152 { .temp_c = 15, .ohm = 162651 },
153 { .temp_c = 20, .ohm = 127080 },
154 { .temp_c = 25, .ohm = 100000 },
155 { .temp_c = 30, .ohm = 79222 },
156 { .temp_c = 35, .ohm = 63167 },
157 { .temp_c = 40, .ohm = 50677 },
158 { .temp_c = 45, .ohm = 40904 },
159 { .temp_c = 50, .ohm = 33195 },
160 { .temp_c = 55, .ohm = 27091 },
161 { .temp_c = 60, .ohm = 22224 },
162 { .temp_c = 65, .ohm = 18323 },
163 { .temp_c = 70, .ohm = 15184 },
164 { .temp_c = 75, .ohm = 12635 },
165 { .temp_c = 80, .ohm = 10566 },
166 { .temp_c = 85, .ohm = 8873 },
167 { .temp_c = 90, .ohm = 7481 },
168 { .temp_c = 95, .ohm = 6337 },
169 { .temp_c = 100, .ohm = 5384 },
170 { .temp_c = 105, .ohm = 4594 },
171 { .temp_c = 110, .ohm = 3934 },
172 { .temp_c = 115, .ohm = 3380 },
173 { .temp_c = 120, .ohm = 2916 },
174 { .temp_c = 125, .ohm = 2522 },
178 { .temp_c = -40, .ohm = 247565 },
179 { .temp_c = -35, .ohm = 181742 },
180 { .temp_c = -30, .ohm = 135128 },
181 { .temp_c = -25, .ohm = 101678 },
182 { .temp_c = -20, .ohm = 77373 },
183 { .temp_c = -15, .ohm = 59504 },
184 { .temp_c = -10, .ohm = 46222 },
185 { .temp_c = -5, .ohm = 36244 },
186 { .temp_c = 0, .ohm = 28674 },
187 { .temp_c = 5, .ohm = 22878 },
188 { .temp_c = 10, .ohm = 18399 },
189 { .temp_c = 15, .ohm = 14910 },
190 { .temp_c = 20, .ohm = 12169 },
191 { .temp_c = 25, .ohm = 10000 },
192 { .temp_c = 30, .ohm = 8271 },
193 { .temp_c = 35, .ohm = 6883 },
194 { .temp_c = 40, .ohm = 5762 },
195 { .temp_c = 45, .ohm = 4851 },
196 { .temp_c = 50, .ohm = 4105 },
197 { .temp_c = 55, .ohm = 3492 },
198 { .temp_c = 60, .ohm = 2985 },
199 { .temp_c = 65, .ohm = 2563 },
200 { .temp_c = 70, .ohm = 2211 },
201 { .temp_c = 75, .ohm = 1915 },
202 { .temp_c = 80, .ohm = 1666 },
203 { .temp_c = 85, .ohm = 1454 },
204 { .temp_c = 90, .ohm = 1275 },
205 { .temp_c = 95, .ohm = 1121 },
206 { .temp_c = 100, .ohm = 990 },
207 { .temp_c = 105, .ohm = 876 },
208 { .temp_c = 110, .ohm = 779 },
209 { .temp_c = 115, .ohm = 694 },
210 { .temp_c = 120, .ohm = 620 },
211 { .temp_c = 125, .ohm = 556 },
219 { .temp_c = -40, .ohm = 190030 },
220 { .temp_c = -35, .ohm = 145360 },
221 { .temp_c = -30, .ohm = 112060 },
222 { .temp_c = -25, .ohm = 87041 },
223 { .temp_c = -20, .ohm = 68104 },
224 { .temp_c = -15, .ohm = 53665 },
225 { .temp_c = -10, .ohm = 42576 },
226 { .temp_c = -5, .ohm = 34001 },
227 { .temp_c = 0, .ohm = 27326 },
228 { .temp_c = 5, .ohm = 22096 },
229 { .temp_c = 10, .ohm = 17973 },
230 { .temp_c = 15, .ohm = 14703 },
231 { .temp_c = 20, .ohm = 12090 },
232 { .temp_c = 25, .ohm = 10000 },
233 { .temp_c = 30, .ohm = 8311 },
234 { .temp_c = 35, .ohm = 6941 },
235 { .temp_c = 40, .ohm = 5825 },
236 { .temp_c = 45, .ohm = 4911 },
237 { .temp_c = 50, .ohm = 4158 },
238 { .temp_c = 55, .ohm = 3536 },
239 { .temp_c = 60, .ohm = 3019 },
240 { .temp_c = 65, .ohm = 2588 },
241 { .temp_c = 70, .ohm = 2227 },
242 { .temp_c = 75, .ohm = 1924 },
243 { .temp_c = 80, .ohm = 1668 },
244 { .temp_c = 85, .ohm = 1451 },
245 { .temp_c = 90, .ohm = 1266 },
246 { .temp_c = 95, .ohm = 1108 },
247 { .temp_c = 100, .ohm = 973 },
248 { .temp_c = 105, .ohm = 857 },
249 { .temp_c = 110, .ohm = 757 },
250 { .temp_c = 115, .ohm = 671 },
251 { .temp_c = 120, .ohm = 596 },
252 { .temp_c = 125, .ohm = 531 },
264 struct iio_channel *channel = pdata->chan; in ntc_adc_iio_read()
276 uv = (pdata->pullup_uv * (s64)raw) >> 12; in ntc_adc_iio_read()
320 struct device_node *np = dev->of_node; in ntc_thermistor_parse_dt()
329 return ERR_PTR(-ENOMEM); in ntc_thermistor_parse_dt()
340 return ERR_PTR(-EINVAL); in ntc_thermistor_parse_dt()
342 if (of_property_read_u32(np, "pullup-uv", &pdata->pullup_uv)) in ntc_thermistor_parse_dt()
343 return ERR_PTR(-ENODEV); in ntc_thermistor_parse_dt()
344 if (of_property_read_u32(np, "pullup-ohm", &pdata->pullup_ohm)) in ntc_thermistor_parse_dt()
345 return ERR_PTR(-ENODEV); in ntc_thermistor_parse_dt()
346 if (of_property_read_u32(np, "pulldown-ohm", &pdata->pulldown_ohm)) in ntc_thermistor_parse_dt()
347 return ERR_PTR(-ENODEV); in ntc_thermistor_parse_dt()
349 if (of_find_property(np, "connected-positive", NULL)) in ntc_thermistor_parse_dt()
350 pdata->connect = NTC_CONNECTED_POSITIVE; in ntc_thermistor_parse_dt()
352 pdata->connect = NTC_CONNECTED_GROUND; in ntc_thermistor_parse_dt()
354 pdata->chan = chan; in ntc_thermistor_parse_dt()
355 pdata->read_uv = ntc_adc_iio_read; in ntc_thermistor_parse_dt()
381 struct ntc_thermistor_platform_data *pdata = data->pdata; in get_ohm_of_thermistor()
382 u32 puv = pdata->pullup_uv; in get_ohm_of_thermistor()
384 puo = pdata->pullup_ohm; in get_ohm_of_thermistor()
385 pdo = pdata->pulldown_ohm; in get_ohm_of_thermistor()
388 return (pdata->connect == NTC_CONNECTED_POSITIVE) ? in get_ohm_of_thermistor()
391 return (pdata->connect == NTC_CONNECTED_POSITIVE) ? in get_ohm_of_thermistor()
394 if (pdata->connect == NTC_CONNECTED_POSITIVE && puo == 0) in get_ohm_of_thermistor()
395 n = div_u64(pdo * (puv - uv), uv); in get_ohm_of_thermistor()
396 else if (pdata->connect == NTC_CONNECTED_GROUND && pdo == 0) in get_ohm_of_thermistor()
397 n = div_u64(puo * uv, puv - uv); in get_ohm_of_thermistor()
398 else if (pdata->connect == NTC_CONNECTED_POSITIVE) in get_ohm_of_thermistor()
399 n = div64_u64_safe(pdo * puo * (puv - uv), in get_ohm_of_thermistor()
400 puo * uv - pdo * (puv - uv)); in get_ohm_of_thermistor()
402 n = div64_u64_safe(pdo * puo * uv, pdo * (puv - uv) - puo * uv); in get_ohm_of_thermistor()
409 static void lookup_comp(struct ntc_data *data, unsigned int ohm, in lookup_comp() argument
421 if (ohm >= data->comp[0].ohm) { in lookup_comp()
426 if (ohm <= data->comp[data->n_comp - 1].ohm) { in lookup_comp()
427 *i_low = data->n_comp - 1; in lookup_comp()
428 *i_high = data->n_comp - 1; in lookup_comp()
434 end = data->n_comp; in lookup_comp()
436 mid = start + (end - start) / 2; in lookup_comp()
439 * data->comp[start].ohm > ohm >= data->comp[end].ohm in lookup_comp()
441 * We could check for "ohm == data->comp[mid].ohm" here, but in lookup_comp()
446 if (ohm >= data->comp[mid].ohm) { in lookup_comp()
451 * ohm >= data->comp[start].ohm might be true here, in lookup_comp()
456 if (ohm >= data->comp[start].ohm) in lookup_comp()
461 * data->comp[start].ohm >= ohm >= data->comp[end].ohm in lookup_comp()
466 * ohm >= data->comp[end].ohm in lookup_comp()
469 if (ohm == data->comp[end].ohm) in lookup_comp()
472 *i_high = end - 1; in lookup_comp()
475 static int get_temp_mc(struct ntc_data *data, unsigned int ohm) in get_temp_mc() argument
480 lookup_comp(data, ohm, &low, &high); in get_temp_mc()
483 temp = data->comp[low].temp_c * 1000; in get_temp_mc()
485 temp = data->comp[low].temp_c * 1000 + in get_temp_mc()
486 ((data->comp[high].temp_c - data->comp[low].temp_c) * in get_temp_mc()
487 1000 * ((int)ohm - (int)data->comp[low].ohm)) / in get_temp_mc()
488 ((int)data->comp[high].ohm - (int)data->comp[low].ohm); in get_temp_mc()
497 if (data->pdata->read_ohm) in ntc_thermistor_get_ohm()
498 return data->pdata->read_ohm(); in ntc_thermistor_get_ohm()
500 if (data->pdata->read_uv) { in ntc_thermistor_get_ohm()
501 read_uv = data->pdata->read_uv(data->pdata); in ntc_thermistor_get_ohm()
506 return -EINVAL; in ntc_thermistor_get_ohm()
511 int ohm; in ntc_read_temp() local
513 ohm = ntc_thermistor_get_ohm(data); in ntc_read_temp()
514 if (ohm < 0) in ntc_read_temp()
515 return ohm; in ntc_read_temp()
517 *temp = get_temp_mc(data, ohm); in ntc_read_temp()
532 int ohm; in ntc_show_temp() local
534 ohm = ntc_thermistor_get_ohm(data); in ntc_show_temp()
535 if (ohm < 0) in ntc_show_temp()
536 return ohm; in ntc_show_temp()
538 return sprintf(buf, "%d\n", get_temp_mc(data, ohm)); in ntc_show_temp()
558 struct device *dev = &pdev->dev; in ntc_thermistor_probe()
574 return -ENODEV; in ntc_thermistor_probe()
578 if (!pdata->read_uv && !pdata->read_ohm) { in ntc_thermistor_probe()
581 return -EINVAL; in ntc_thermistor_probe()
584 if (pdata->read_uv && pdata->read_ohm) { in ntc_thermistor_probe()
587 pdata->read_uv = NULL; in ntc_thermistor_probe()
590 if (pdata->read_uv && (pdata->pullup_uv == 0 || in ntc_thermistor_probe()
591 (pdata->pullup_ohm == 0 && pdata->connect == in ntc_thermistor_probe()
593 (pdata->pulldown_ohm == 0 && pdata->connect == in ntc_thermistor_probe()
595 (pdata->connect != NTC_CONNECTED_POSITIVE && in ntc_thermistor_probe()
596 pdata->connect != NTC_CONNECTED_GROUND))) { in ntc_thermistor_probe()
598 return -EINVAL; in ntc_thermistor_probe()
603 return -ENOMEM; in ntc_thermistor_probe()
605 pdev_id = of_id ? of_id->data : platform_get_device_id(pdev); in ntc_thermistor_probe()
607 data->pdata = pdata; in ntc_thermistor_probe()
609 switch (pdev_id->driver_data) { in ntc_thermistor_probe()
611 data->comp = ncpXXwb473; in ntc_thermistor_probe()
612 data->n_comp = ARRAY_SIZE(ncpXXwb473); in ntc_thermistor_probe()
615 data->comp = ncpXXwl333; in ntc_thermistor_probe()
616 data->n_comp = ARRAY_SIZE(ncpXXwl333); in ntc_thermistor_probe()
619 data->comp = b57330v2103; in ntc_thermistor_probe()
620 data->n_comp = ARRAY_SIZE(b57330v2103); in ntc_thermistor_probe()
623 data->comp = ncpXXwf104; in ntc_thermistor_probe()
624 data->n_comp = ARRAY_SIZE(ncpXXwf104); in ntc_thermistor_probe()
627 data->comp = ncpXXxh103; in ntc_thermistor_probe()
628 data->n_comp = ARRAY_SIZE(ncpXXxh103); in ntc_thermistor_probe()
632 pdev_id->driver_data, pdev_id->name); in ntc_thermistor_probe()
633 return -EINVAL; in ntc_thermistor_probe()
636 hwmon_dev = devm_hwmon_device_register_with_groups(dev, pdev_id->name, in ntc_thermistor_probe()
644 pdev_id->name); in ntc_thermistor_probe()
656 .name = "ntc-thermistor",
668 MODULE_ALIAS("platform:ntc-thermistor");