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ffcb2fc8 K |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * TI Bandgap temperature sensor driver for J72XX SoC Family | |
4 | * | |
5 | * Copyright (C) 2021 Texas Instruments Incorporated - http://www.ti.com/ | |
6 | */ | |
7 | ||
8 | #include <linux/math.h> | |
9 | #include <linux/math64.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/pm_runtime.h> | |
14 | #include <linux/err.h> | |
15 | #include <linux/types.h> | |
16 | #include <linux/of_platform.h> | |
17 | #include <linux/io.h> | |
18 | #include <linux/thermal.h> | |
19 | #include <linux/of.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/slab.h> | |
22 | ||
23 | #define K3_VTM_DEVINFO_PWR0_OFFSET 0x4 | |
24 | #define K3_VTM_DEVINFO_PWR0_TEMPSENS_CT_MASK 0xf0 | |
25 | #define K3_VTM_TMPSENS0_CTRL_OFFSET 0x300 | |
26 | #define K3_VTM_MISC_CTRL_OFFSET 0xc | |
27 | #define K3_VTM_TMPSENS_STAT_OFFSET 0x8 | |
28 | #define K3_VTM_ANYMAXT_OUTRG_ALERT_EN 0x1 | |
29 | #define K3_VTM_MISC_CTRL2_OFFSET 0x10 | |
30 | #define K3_VTM_TS_STAT_DTEMP_MASK 0x3ff | |
31 | #define K3_VTM_MAX_NUM_TS 8 | |
32 | #define K3_VTM_TMPSENS_CTRL_SOC BIT(5) | |
33 | #define K3_VTM_TMPSENS_CTRL_CLRZ BIT(6) | |
34 | #define K3_VTM_TMPSENS_CTRL_CLKON_REQ BIT(7) | |
35 | #define K3_VTM_TMPSENS_CTRL_MAXT_OUTRG_EN BIT(11) | |
36 | ||
37 | #define K3_VTM_CORRECTION_TEMP_CNT 3 | |
38 | ||
39 | #define MINUS40CREF 5 | |
40 | #define PLUS30CREF 253 | |
41 | #define PLUS125CREF 730 | |
42 | #define PLUS150CREF 940 | |
43 | ||
44 | #define TABLE_SIZE 1024 | |
45 | #define MAX_TEMP 123000 | |
46 | #define COOL_DOWN_TEMP 105000 | |
47 | ||
48 | #define FACTORS_REDUCTION 13 | |
49 | static int *derived_table; | |
50 | ||
51 | static int compute_value(int index, const s64 *factors, int nr_factors, | |
52 | int reduction) | |
53 | { | |
54 | s64 value = 0; | |
55 | int i; | |
56 | ||
57 | for (i = 0; i < nr_factors; i++) | |
58 | value += factors[i] * int_pow(index, i); | |
59 | ||
60 | return (int)div64_s64(value, int_pow(10, reduction)); | |
61 | } | |
62 | ||
63 | static void init_table(int factors_size, int *table, const s64 *factors) | |
64 | { | |
65 | int i; | |
66 | ||
67 | for (i = 0; i < TABLE_SIZE; i++) | |
68 | table[i] = compute_value(i, factors, factors_size, | |
69 | FACTORS_REDUCTION); | |
70 | } | |
71 | ||
72 | /** | |
73 | * struct err_values - structure containing error/reference values | |
74 | * @refs: reference error values for -40C, 30C, 125C & 150C | |
75 | * @errs: Actual error values for -40C, 30C, 125C & 150C read from the efuse | |
76 | */ | |
77 | struct err_values { | |
78 | int refs[4]; | |
79 | int errs[4]; | |
80 | }; | |
81 | ||
82 | static void create_table_segments(struct err_values *err_vals, int seg, | |
83 | int *ref_table) | |
84 | { | |
85 | int m = 0, c, num, den, i, err, idx1, idx2, err1, err2, ref1, ref2; | |
86 | ||
87 | if (seg == 0) | |
88 | idx1 = 0; | |
89 | else | |
90 | idx1 = err_vals->refs[seg]; | |
91 | ||
92 | idx2 = err_vals->refs[seg + 1]; | |
93 | err1 = err_vals->errs[seg]; | |
94 | err2 = err_vals->errs[seg + 1]; | |
95 | ref1 = err_vals->refs[seg]; | |
96 | ref2 = err_vals->refs[seg + 1]; | |
97 | ||
98 | /* | |
99 | * Calculate the slope with adc values read from the register | |
100 | * as the y-axis param and err in adc value as x-axis param | |
101 | */ | |
102 | num = ref2 - ref1; | |
103 | den = err2 - err1; | |
104 | if (den) | |
105 | m = num / den; | |
106 | c = ref2 - m * err2; | |
107 | ||
108 | /* | |
109 | * Take care of divide by zero error if error values are same | |
110 | * Or when the slope is 0 | |
111 | */ | |
112 | if (den != 0 && m != 0) { | |
113 | for (i = idx1; i <= idx2; i++) { | |
114 | err = (i - c) / m; | |
115 | if (((i + err) < 0) || ((i + err) >= TABLE_SIZE)) | |
116 | continue; | |
117 | derived_table[i] = ref_table[i + err]; | |
118 | } | |
119 | } else { /* Constant error take care of divide by zero */ | |
120 | for (i = idx1; i <= idx2; i++) { | |
121 | if (((i + err1) < 0) || ((i + err1) >= TABLE_SIZE)) | |
122 | continue; | |
123 | derived_table[i] = ref_table[i + err1]; | |
124 | } | |
125 | } | |
126 | } | |
127 | ||
128 | static int prep_lookup_table(struct err_values *err_vals, int *ref_table) | |
129 | { | |
130 | int inc, i, seg; | |
131 | ||
132 | /* | |
133 | * Fill up the lookup table under 3 segments | |
134 | * region -40C to +30C | |
135 | * region +30C to +125C | |
136 | * region +125C to +150C | |
137 | */ | |
138 | for (seg = 0; seg < 3; seg++) | |
139 | create_table_segments(err_vals, seg, ref_table); | |
140 | ||
141 | /* Get to the first valid temperature */ | |
142 | i = 0; | |
143 | while (!derived_table[i]) | |
144 | i++; | |
145 | ||
146 | /* | |
147 | * Get to the last zero index and back fill the temperature for | |
148 | * sake of continuity | |
149 | */ | |
150 | if (i) { | |
151 | /* 300 milli celsius steps */ | |
152 | while (i--) | |
153 | derived_table[i] = derived_table[i + 1] - 300; | |
ffcb2fc8 K |
154 | } |
155 | ||
156 | /* | |
157 | * Fill the last trailing 0s which are unfilled with increments of | |
158 | * 100 milli celsius till 1023 code | |
159 | */ | |
160 | i = TABLE_SIZE - 1; | |
161 | while (!derived_table[i]) | |
162 | i--; | |
163 | ||
164 | i++; | |
165 | inc = 1; | |
166 | while (i < TABLE_SIZE) { | |
167 | derived_table[i] = derived_table[i - 1] + inc * 100; | |
168 | i++; | |
169 | } | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | struct k3_thermal_data; | |
175 | ||
176 | struct k3_j72xx_bandgap { | |
177 | struct device *dev; | |
178 | void __iomem *base; | |
179 | void __iomem *cfg2_base; | |
180 | void __iomem *fuse_base; | |
181 | struct k3_thermal_data *ts_data[K3_VTM_MAX_NUM_TS]; | |
182 | }; | |
183 | ||
184 | /* common data structures */ | |
185 | struct k3_thermal_data { | |
186 | struct k3_j72xx_bandgap *bgp; | |
187 | u32 ctrl_offset; | |
188 | u32 stat_offset; | |
189 | }; | |
190 | ||
191 | static int two_cmp(int tmp, int mask) | |
192 | { | |
193 | tmp = ~(tmp); | |
194 | tmp &= mask; | |
195 | tmp += 1; | |
196 | ||
197 | /* Return negative value */ | |
198 | return (0 - tmp); | |
199 | } | |
200 | ||
201 | static unsigned int vtm_get_best_value(unsigned int s0, unsigned int s1, | |
202 | unsigned int s2) | |
203 | { | |
204 | int d01 = abs(s0 - s1); | |
205 | int d02 = abs(s0 - s2); | |
206 | int d12 = abs(s1 - s2); | |
207 | ||
208 | if (d01 <= d02 && d01 <= d12) | |
209 | return (s0 + s1) / 2; | |
210 | ||
211 | if (d02 <= d01 && d02 <= d12) | |
212 | return (s0 + s2) / 2; | |
213 | ||
214 | return (s1 + s2) / 2; | |
215 | } | |
216 | ||
217 | static inline int k3_bgp_read_temp(struct k3_thermal_data *devdata, | |
218 | int *temp) | |
219 | { | |
220 | struct k3_j72xx_bandgap *bgp; | |
221 | unsigned int dtemp, s0, s1, s2; | |
222 | ||
223 | bgp = devdata->bgp; | |
224 | /* | |
225 | * Errata is applicable for am654 pg 1.0 silicon/J7ES. There | |
226 | * is a variation of the order for certain degree centigrade on AM654. | |
227 | * Work around that by getting the average of two closest | |
228 | * readings out of three readings everytime we want to | |
229 | * report temperatures. | |
230 | * | |
231 | * Errata workaround. | |
232 | */ | |
233 | s0 = readl(bgp->base + devdata->stat_offset) & | |
234 | K3_VTM_TS_STAT_DTEMP_MASK; | |
235 | s1 = readl(bgp->base + devdata->stat_offset) & | |
236 | K3_VTM_TS_STAT_DTEMP_MASK; | |
237 | s2 = readl(bgp->base + devdata->stat_offset) & | |
238 | K3_VTM_TS_STAT_DTEMP_MASK; | |
239 | dtemp = vtm_get_best_value(s0, s1, s2); | |
240 | ||
241 | if (dtemp < 0 || dtemp >= TABLE_SIZE) | |
242 | return -EINVAL; | |
243 | ||
244 | *temp = derived_table[dtemp]; | |
245 | ||
246 | return 0; | |
247 | } | |
248 | ||
249 | /* Get temperature callback function for thermal zone */ | |
250 | static int k3_thermal_get_temp(void *devdata, int *temp) | |
251 | { | |
252 | struct k3_thermal_data *data = devdata; | |
253 | int ret = 0; | |
254 | ||
255 | ret = k3_bgp_read_temp(data, temp); | |
256 | if (ret) | |
257 | return ret; | |
258 | ||
259 | return ret; | |
260 | } | |
261 | ||
262 | static const struct thermal_zone_of_device_ops k3_of_thermal_ops = { | |
263 | .get_temp = k3_thermal_get_temp, | |
264 | }; | |
265 | ||
266 | static int k3_j72xx_bandgap_temp_to_adc_code(int temp) | |
267 | { | |
268 | int low = 0, high = TABLE_SIZE - 1, mid; | |
269 | ||
270 | if (temp > 160000 || temp < -50000) | |
271 | return -EINVAL; | |
272 | ||
273 | /* Binary search to find the adc code */ | |
274 | while (low < (high - 1)) { | |
275 | mid = (low + high) / 2; | |
276 | if (temp <= derived_table[mid]) | |
277 | high = mid; | |
278 | else | |
279 | low = mid; | |
280 | } | |
281 | ||
282 | return mid; | |
283 | } | |
284 | ||
285 | static void get_efuse_values(int id, struct k3_thermal_data *data, int *err, | |
286 | struct k3_j72xx_bandgap *bgp) | |
287 | { | |
288 | int i, tmp, pow; | |
289 | int ct_offsets[5][K3_VTM_CORRECTION_TEMP_CNT] = { | |
290 | { 0x0, 0x8, 0x4 }, | |
291 | { 0x0, 0x8, 0x4 }, | |
292 | { 0x0, -1, 0x4 }, | |
293 | { 0x0, 0xC, -1 }, | |
294 | { 0x0, 0xc, 0x8 } | |
295 | }; | |
296 | int ct_bm[5][K3_VTM_CORRECTION_TEMP_CNT] = { | |
297 | { 0x3f, 0x1fe000, 0x1ff }, | |
298 | { 0xfc0, 0x1fe000, 0x3fe00 }, | |
299 | { 0x3f000, 0x7f800000, 0x7fc0000 }, | |
300 | { 0xfc0000, 0x1fe0, 0x1f800000 }, | |
301 | { 0x3f000000, 0x1fe000, 0x1ff0 } | |
302 | }; | |
303 | ||
304 | for (i = 0; i < 3; i++) { | |
305 | /* Extract the offset value using bit-mask */ | |
306 | if (ct_offsets[id][i] == -1 && i == 1) { | |
307 | /* 25C offset Case of Sensor 2 split between 2 regs */ | |
308 | tmp = (readl(bgp->fuse_base + 0x8) & 0xE0000000) >> (29); | |
309 | tmp |= ((readl(bgp->fuse_base + 0xC) & 0x1F) << 3); | |
310 | pow = tmp & 0x80; | |
311 | } else if (ct_offsets[id][i] == -1 && i == 2) { | |
312 | /* 125C Case of Sensor 3 split between 2 regs */ | |
313 | tmp = (readl(bgp->fuse_base + 0x4) & 0xF8000000) >> (27); | |
314 | tmp |= ((readl(bgp->fuse_base + 0x8) & 0xF) << 5); | |
315 | pow = tmp & 0x100; | |
316 | } else { | |
317 | tmp = readl(bgp->fuse_base + ct_offsets[id][i]); | |
318 | tmp &= ct_bm[id][i]; | |
319 | tmp = tmp >> __ffs(ct_bm[id][i]); | |
320 | ||
321 | /* Obtain the sign bit pow*/ | |
322 | pow = ct_bm[id][i] >> __ffs(ct_bm[id][i]); | |
323 | pow += 1; | |
324 | pow /= 2; | |
325 | } | |
326 | ||
327 | /* Check for negative value */ | |
328 | if (tmp & pow) { | |
329 | /* 2's complement value */ | |
330 | tmp = two_cmp(tmp, ct_bm[id][i] >> __ffs(ct_bm[id][i])); | |
331 | } | |
332 | err[i] = tmp; | |
333 | } | |
334 | ||
335 | /* Err value for 150C is set to 0 */ | |
336 | err[i] = 0; | |
337 | } | |
338 | ||
339 | static void print_look_up_table(struct device *dev, int *ref_table) | |
340 | { | |
341 | int i; | |
342 | ||
343 | dev_dbg(dev, "The contents of derived array\n"); | |
344 | dev_dbg(dev, "Code Temperature\n"); | |
345 | for (i = 0; i < TABLE_SIZE; i++) | |
346 | dev_dbg(dev, "%d %d %d\n", i, derived_table[i], ref_table[i]); | |
347 | } | |
348 | ||
349 | struct k3_j72xx_bandgap_data { | |
350 | unsigned int has_errata_i2128; | |
351 | }; | |
352 | ||
353 | static int k3_j72xx_bandgap_probe(struct platform_device *pdev) | |
354 | { | |
355 | int ret = 0, cnt, val, id; | |
356 | int high_max, low_temp; | |
357 | struct resource *res; | |
358 | struct device *dev = &pdev->dev; | |
359 | struct k3_j72xx_bandgap *bgp; | |
360 | struct k3_thermal_data *data; | |
361 | int workaround_needed = 0; | |
362 | const struct k3_j72xx_bandgap_data *driver_data; | |
363 | struct thermal_zone_device *ti_thermal; | |
364 | int *ref_table; | |
365 | struct err_values err_vals; | |
366 | ||
367 | const s64 golden_factors[] = { | |
368 | -490019999999999936, | |
369 | 3251200000000000, | |
370 | -1705800000000, | |
371 | 603730000, | |
372 | -92627, | |
373 | }; | |
374 | ||
375 | const s64 pvt_wa_factors[] = { | |
376 | -415230000000000000, | |
377 | 3126600000000000, | |
378 | -1157800000000, | |
379 | }; | |
380 | ||
381 | bgp = devm_kzalloc(&pdev->dev, sizeof(*bgp), GFP_KERNEL); | |
382 | if (!bgp) | |
383 | return -ENOMEM; | |
384 | ||
385 | bgp->dev = dev; | |
386 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
387 | bgp->base = devm_ioremap_resource(dev, res); | |
388 | if (IS_ERR(bgp->base)) | |
389 | return PTR_ERR(bgp->base); | |
390 | ||
391 | res = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
392 | bgp->cfg2_base = devm_ioremap_resource(dev, res); | |
393 | if (IS_ERR(bgp->cfg2_base)) | |
394 | return PTR_ERR(bgp->cfg2_base); | |
395 | ||
396 | res = platform_get_resource(pdev, IORESOURCE_MEM, 2); | |
397 | bgp->fuse_base = devm_ioremap_resource(dev, res); | |
398 | if (IS_ERR(bgp->fuse_base)) | |
399 | return PTR_ERR(bgp->fuse_base); | |
400 | ||
401 | driver_data = of_device_get_match_data(dev); | |
402 | if (driver_data) | |
403 | workaround_needed = driver_data->has_errata_i2128; | |
404 | ||
405 | pm_runtime_enable(dev); | |
406 | ret = pm_runtime_get_sync(dev); | |
407 | if (ret < 0) { | |
408 | pm_runtime_put_noidle(dev); | |
409 | pm_runtime_disable(dev); | |
410 | return ret; | |
411 | } | |
412 | ||
413 | /* Get the sensor count in the VTM */ | |
414 | val = readl(bgp->base + K3_VTM_DEVINFO_PWR0_OFFSET); | |
415 | cnt = val & K3_VTM_DEVINFO_PWR0_TEMPSENS_CT_MASK; | |
416 | cnt >>= __ffs(K3_VTM_DEVINFO_PWR0_TEMPSENS_CT_MASK); | |
417 | ||
418 | data = devm_kcalloc(bgp->dev, cnt, sizeof(*data), GFP_KERNEL); | |
419 | if (!data) { | |
420 | ret = -ENOMEM; | |
421 | goto err_alloc; | |
422 | } | |
423 | ||
424 | ref_table = kzalloc(sizeof(*ref_table) * TABLE_SIZE, GFP_KERNEL); | |
425 | if (!ref_table) { | |
426 | ret = -ENOMEM; | |
427 | goto err_alloc; | |
428 | } | |
429 | ||
430 | derived_table = devm_kzalloc(bgp->dev, sizeof(*derived_table) * TABLE_SIZE, | |
431 | GFP_KERNEL); | |
432 | if (!derived_table) { | |
433 | ret = -ENOMEM; | |
99a049aa | 434 | goto err_free_ref_table; |
ffcb2fc8 K |
435 | } |
436 | ||
437 | /* Workaround not needed if bit30/bit31 is set even for J721e */ | |
438 | if (workaround_needed && (readl(bgp->fuse_base + 0x0) & 0xc0000000) == 0xc0000000) | |
439 | workaround_needed = false; | |
440 | ||
441 | dev_dbg(bgp->dev, "Work around %sneeded\n", | |
442 | workaround_needed ? "not " : ""); | |
443 | ||
444 | if (!workaround_needed) | |
445 | init_table(5, ref_table, golden_factors); | |
446 | else | |
447 | init_table(3, ref_table, pvt_wa_factors); | |
448 | ||
449 | /* Register the thermal sensors */ | |
450 | for (id = 0; id < cnt; id++) { | |
451 | data[id].bgp = bgp; | |
452 | data[id].ctrl_offset = K3_VTM_TMPSENS0_CTRL_OFFSET + id * 0x20; | |
453 | data[id].stat_offset = data[id].ctrl_offset + | |
454 | K3_VTM_TMPSENS_STAT_OFFSET; | |
455 | ||
456 | if (workaround_needed) { | |
457 | /* ref adc values for -40C, 30C & 125C respectively */ | |
458 | err_vals.refs[0] = MINUS40CREF; | |
459 | err_vals.refs[1] = PLUS30CREF; | |
460 | err_vals.refs[2] = PLUS125CREF; | |
461 | err_vals.refs[3] = PLUS150CREF; | |
462 | get_efuse_values(id, &data[id], err_vals.errs, bgp); | |
463 | } | |
464 | ||
465 | if (id == 0 && workaround_needed) | |
466 | prep_lookup_table(&err_vals, ref_table); | |
467 | else if (id == 0 && !workaround_needed) | |
468 | memcpy(derived_table, ref_table, TABLE_SIZE * 4); | |
469 | ||
470 | val = readl(data[id].bgp->cfg2_base + data[id].ctrl_offset); | |
471 | val |= (K3_VTM_TMPSENS_CTRL_MAXT_OUTRG_EN | | |
472 | K3_VTM_TMPSENS_CTRL_SOC | | |
473 | K3_VTM_TMPSENS_CTRL_CLRZ | BIT(4)); | |
474 | writel(val, data[id].bgp->cfg2_base + data[id].ctrl_offset); | |
475 | ||
476 | bgp->ts_data[id] = &data[id]; | |
477 | ti_thermal = | |
478 | devm_thermal_zone_of_sensor_register(bgp->dev, id, | |
479 | &data[id], | |
480 | &k3_of_thermal_ops); | |
481 | if (IS_ERR(ti_thermal)) { | |
482 | dev_err(bgp->dev, "thermal zone device is NULL\n"); | |
483 | ret = PTR_ERR(ti_thermal); | |
99a049aa | 484 | goto err_free_ref_table; |
ffcb2fc8 K |
485 | } |
486 | } | |
487 | ||
488 | /* | |
489 | * Program TSHUT thresholds | |
490 | * Step 1: set the thresholds to ~123C and 105C WKUP_VTM_MISC_CTRL2 | |
491 | * Step 2: WKUP_VTM_TMPSENS_CTRL_j set the MAXT_OUTRG_EN bit | |
492 | * This is already taken care as per of init | |
493 | * Step 3: WKUP_VTM_MISC_CTRL set the ANYMAXT_OUTRG_ALERT_EN bit | |
494 | */ | |
495 | high_max = k3_j72xx_bandgap_temp_to_adc_code(MAX_TEMP); | |
496 | low_temp = k3_j72xx_bandgap_temp_to_adc_code(COOL_DOWN_TEMP); | |
497 | ||
498 | writel((low_temp << 16) | high_max, data[0].bgp->cfg2_base + | |
499 | K3_VTM_MISC_CTRL2_OFFSET); | |
500 | mdelay(100); | |
501 | writel(K3_VTM_ANYMAXT_OUTRG_ALERT_EN, data[0].bgp->cfg2_base + | |
502 | K3_VTM_MISC_CTRL_OFFSET); | |
503 | ||
504 | platform_set_drvdata(pdev, bgp); | |
505 | ||
506 | print_look_up_table(dev, ref_table); | |
507 | /* | |
508 | * Now that the derived_table has the appropriate look up values | |
509 | * Free up the ref_table | |
510 | */ | |
511 | kfree(ref_table); | |
512 | ||
513 | return 0; | |
514 | ||
99a049aa BB |
515 | err_free_ref_table: |
516 | kfree(ref_table); | |
517 | ||
ffcb2fc8 K |
518 | err_alloc: |
519 | pm_runtime_put_sync(&pdev->dev); | |
520 | pm_runtime_disable(&pdev->dev); | |
521 | ||
522 | return ret; | |
523 | } | |
524 | ||
525 | static int k3_j72xx_bandgap_remove(struct platform_device *pdev) | |
526 | { | |
527 | pm_runtime_put_sync(&pdev->dev); | |
528 | pm_runtime_disable(&pdev->dev); | |
529 | ||
530 | return 0; | |
531 | } | |
532 | ||
4aaec53b | 533 | static const struct k3_j72xx_bandgap_data k3_j72xx_bandgap_j721e_data = { |
ffcb2fc8 K |
534 | .has_errata_i2128 = 1, |
535 | }; | |
536 | ||
4aaec53b | 537 | static const struct k3_j72xx_bandgap_data k3_j72xx_bandgap_j7200_data = { |
ffcb2fc8 K |
538 | .has_errata_i2128 = 0, |
539 | }; | |
540 | ||
541 | static const struct of_device_id of_k3_j72xx_bandgap_match[] = { | |
542 | { | |
543 | .compatible = "ti,j721e-vtm", | |
544 | .data = &k3_j72xx_bandgap_j721e_data, | |
545 | }, | |
546 | { | |
547 | .compatible = "ti,j7200-vtm", | |
548 | .data = &k3_j72xx_bandgap_j7200_data, | |
549 | }, | |
550 | { /* sentinel */ }, | |
551 | }; | |
552 | MODULE_DEVICE_TABLE(of, of_k3_j72xx_bandgap_match); | |
553 | ||
554 | static struct platform_driver k3_j72xx_bandgap_sensor_driver = { | |
555 | .probe = k3_j72xx_bandgap_probe, | |
556 | .remove = k3_j72xx_bandgap_remove, | |
557 | .driver = { | |
558 | .name = "k3-j72xx-soc-thermal", | |
559 | .of_match_table = of_k3_j72xx_bandgap_match, | |
560 | }, | |
561 | }; | |
562 | ||
563 | module_platform_driver(k3_j72xx_bandgap_sensor_driver); | |
564 | ||
565 | MODULE_DESCRIPTION("K3 bandgap temperature sensor driver"); | |
566 | MODULE_LICENSE("GPL"); | |
567 | MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); |