| H A D | ntc_thermistor.c | 45 unsigned int ohm; member in struct:ntc_compensation
60 * A compensation table should be sorted by the values of .ohm
66 { .temp_c = -40, .ohm = 1747920 },
67 { .temp_c = -35, .ohm = 1245428 },
68 { .temp_c = -30, .ohm = 898485 },
69 { .temp_c = -25, .ohm = 655802 },
70 { .temp_c = -20, .ohm = 483954 },
71 { .temp_c = -15, .ohm = 360850 },
72 { .temp_c = -10, .ohm = 271697 },
73 { .temp_c = -5, .ohm = 206463 },
74 { .temp_c = 0, .ohm = 158214 },
75 { .temp_c = 5, .ohm = 122259 },
76 { .temp_c = 10, .ohm = 95227 },
77 { .temp_c = 15, .ohm = 74730 },
78 { .temp_c = 20, .ohm = 59065 },
79 { .temp_c = 25, .ohm = 47000 },
80 { .temp_c = 30, .ohm = 37643 },
81 { .temp_c = 35, .ohm = 30334 },
82 { .temp_c = 40, .ohm = 24591 },
83 { .temp_c = 45, .ohm = 20048 },
84 { .temp_c = 50, .ohm = 16433 },
85 { .temp_c = 55, .ohm = 13539 },
86 { .temp_c = 60, .ohm = 11209 },
87 { .temp_c = 65, .ohm = 9328 },
88 { .temp_c = 70, .ohm = 7798 },
89 { .temp_c = 75, .ohm = 6544 },
90 { .temp_c = 80, .ohm = 5518 },
91 { .temp_c = 85, .ohm = 4674 },
92 { .temp_c = 90, .ohm = 3972 },
93 { .temp_c = 95, .ohm = 3388 },
94 { .temp_c = 100, .ohm = 2902 },
95 { .temp_c = 105, .ohm = 2494 },
96 { .temp_c = 110, .ohm = 2150 },
97 { .temp_c = 115, .ohm = 1860 },
98 { .temp_c = 120, .ohm = 1615 },
99 { .temp_c = 125, .ohm = 1406 },
102 { .temp_c = -40, .ohm = 1610154 },
103 { .temp_c = -35, .ohm = 1130850 },
104 { .temp_c = -30, .ohm = 802609 },
105 { .temp_c = -25, .ohm = 575385 },
106 { .temp_c = -20, .ohm = 416464 },
107 { .temp_c = -15, .ohm = 304219 },
108 { .temp_c = -10, .ohm = 224193 },
109 { .temp_c = -5, .ohm = 166623 },
110 { .temp_c = 0, .ohm = 124850 },
111 { .temp_c = 5, .ohm = 94287 },
112 { .temp_c = 10, .ohm = 71747 },
113 { .temp_c = 15, .ohm = 54996 },
114 { .temp_c = 20, .ohm = 42455 },
115 { .temp_c = 25, .ohm = 33000 },
116 { .temp_c = 30, .ohm = 25822 },
117 { .temp_c = 35, .ohm = 20335 },
118 { .temp_c = 40, .ohm = 16115 },
119 { .temp_c = 45, .ohm = 12849 },
120 { .temp_c = 50, .ohm = 10306 },
121 { .temp_c = 55, .ohm = 8314 },
122 { .temp_c = 60, .ohm = 6746 },
123 { .temp_c = 65, .ohm = 5503 },
124 { .temp_c = 70, .ohm = 4513 },
125 { .temp_c = 75, .ohm = 3721 },
126 { .temp_c = 80, .ohm = 3084 },
127 { .temp_c = 85, .ohm = 2569 },
128 { .temp_c = 90, .ohm = 2151 },
129 { .temp_c = 95, .ohm = 1809 },
130 { .temp_c = 100, .ohm = 1529 },
131 { .temp_c = 105, .ohm = 1299 },
132 { .temp_c = 110, .ohm = 1108 },
133 { .temp_c = 115, .ohm = 949 },
134 { .temp_c = 120, .ohm = 817 },
135 { .temp_c = 125, .ohm = 707 },
143 { .temp_c = -40, .ohm = 190030 },
144 { .temp_c = -35, .ohm = 145360 },
145 { .temp_c = -30, .ohm = 112060 },
146 { .temp_c = -25, .ohm = 87041 },
147 { .temp_c = -20, .ohm = 68104 },
148 { .temp_c = -15, .ohm = 53665 },
149 { .temp_c = -10, .ohm = 42576 },
150 { .temp_c = -5, .ohm = 34001 },
151 { .temp_c = 0, .ohm = 27326 },
152 { .temp_c = 5, .ohm = 22096 },
153 { .temp_c = 10, .ohm = 17973 },
154 { .temp_c = 15, .ohm = 14703 },
155 { .temp_c = 20, .ohm = 12090 },
156 { .temp_c = 25, .ohm = 10000 },
157 { .temp_c = 30, .ohm = 8311 },
158 { .temp_c = 35, .ohm = 6941 },
159 { .temp_c = 40, .ohm = 5825 },
160 { .temp_c = 45, .ohm = 4911 },
161 { .temp_c = 50, .ohm = 4158 },
162 { .temp_c = 55, .ohm = 3536 },
163 { .temp_c = 60, .ohm = 3019 },
164 { .temp_c = 65, .ohm = 2588 },
165 { .temp_c = 70, .ohm = 2227 },
166 { .temp_c = 75, .ohm = 1924 },
167 { .temp_c = 80, .ohm = 1668 },
168 { .temp_c = 85, .ohm = 1451 },
169 { .temp_c = 90, .ohm = 1266 },
170 { .temp_c = 95, .ohm = 1108 },
171 { .temp_c = 100, .ohm = 973 },
172 { .temp_c = 105, .ohm = 857 },
173 { .temp_c = 110, .ohm = 757 },
174 { .temp_c = 115, .ohm = 671 },
175 { .temp_c = 120, .ohm = 596 },
176 { .temp_c = 125, .ohm = 531 },
267 if (of_property_read_u32(np, "pullup-ohm", &pdata->pullup_ohm)) ntc_thermistor_parse_dt()
269 if (of_property_read_u32(np, "pulldown-ohm", &pdata->pulldown_ohm)) ntc_thermistor_parse_dt()
342 static void lookup_comp(struct ntc_data *data, unsigned int ohm, lookup_comp() argument
354 if (ohm >= data->comp[0].ohm) { lookup_comp()
359 if (ohm <= data->comp[data->n_comp - 1].ohm) { lookup_comp()
372 * data->comp[start].ohm > ohm >= data->comp[end].ohm lookup_comp()
374 * We could check for "ohm == data->comp[mid].ohm" here, but lookup_comp()
379 if (ohm >= data->comp[mid].ohm) { lookup_comp()
384 * ohm >= data->comp[start].ohm might be true here, lookup_comp()
389 if (ohm >= data->comp[start].ohm) lookup_comp()
394 * data->comp[start].ohm >= ohm >= data->comp[end].ohm lookup_comp()
399 * ohm >= data->comp[end].ohm lookup_comp()
402 if (ohm == data->comp[end].ohm) lookup_comp()
408 static int get_temp_mc(struct ntc_data *data, unsigned int ohm) get_temp_mc() argument
413 lookup_comp(data, ohm, &low, &high); get_temp_mc()
420 1000 * ((int)ohm - (int)data->comp[low].ohm)) / get_temp_mc()
421 ((int)data->comp[high].ohm - (int)data->comp[low].ohm); get_temp_mc()
445 int ohm; ntc_read_temp() local
447 ohm = ntc_thermistor_get_ohm(data); ntc_read_temp()
448 if (ohm < 0) ntc_read_temp()
449 return ohm; ntc_read_temp()
451 *temp = get_temp_mc(data, ohm); ntc_read_temp()
474 int ohm; ntc_show_temp() local
476 ohm = ntc_thermistor_get_ohm(data); ntc_show_temp()
477 if (ohm < 0) ntc_show_temp()
478 return ohm; ntc_show_temp()
480 return sprintf(buf, "%d\n", get_temp_mc(data, ohm)); ntc_show_temp()
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