add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/mfd/tps65218.c
..
..
@@ -1,7 +1,7 @@
1
1
 /*
2
2
  * Driver for TPS65218 Integrated power management chipsets
3
3
  *
4
- * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
4
+ * Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com/
5
5
  *
6
6
  * This program is free software; you can redistribute it and/or
7
7
  * modify it under the terms of the GNU General Public License version 2 as
..
..
@@ -48,7 +48,7 @@
48
48
 /**
49
49
  * tps65218_reg_write: Write a single tps65218 register.
50
50
  *
51
- * @tps65218: Device to write to.
51
+ * @tps: Device to write to.
52
52
  * @reg: Register to write to.
53
53
  * @val: Value to write.
54
54
  * @level: Password protected level
..
..
@@ -79,7 +79,7 @@
79
79
 /**
80
80
  * tps65218_update_bits: Modify bits w.r.t mask, val and level.
81
81
  *
82
- * @tps65218: Device to write to.
82
+ * @tps: Device to write to.
83
83
  * @reg: Register to read-write to.
84
84
  * @mask: Mask.
85
85
  * @val: Value to write.
..
..
@@ -211,6 +211,83 @@
211
211
 };
212
212
 MODULE_DEVICE_TABLE(of, of_tps65218_match_table);
213
213
 
214
+static int tps65218_voltage_set_strict(struct tps65218 *tps)
215
+{
216
+	u32 strict;
217
+
218
+	if (of_property_read_u32(tps->dev->of_node,
219
+				 "ti,strict-supply-voltage-supervision",
220
+				 &strict))
221
+		return 0;
222
+
223
+	if (strict != 0 && strict != 1) {
224
+		dev_err(tps->dev,
225
+			"Invalid ti,strict-supply-voltage-supervision value\n");
226
+		return -EINVAL;
227
+	}
228
+
229
+	tps65218_update_bits(tps, TPS65218_REG_CONFIG1,
230
+			     TPS65218_CONFIG1_STRICT,
231
+			     strict ? TPS65218_CONFIG1_STRICT : 0,
232
+			     TPS65218_PROTECT_L1);
233
+	return 0;
234
+}
235
+
236
+static int tps65218_voltage_set_uv_hyst(struct tps65218 *tps)
237
+{
238
+	u32 hyst;
239
+
240
+	if (of_property_read_u32(tps->dev->of_node,
241
+				 "ti,under-voltage-hyst-microvolt", &hyst))
242
+		return 0;
243
+
244
+	if (hyst != 400000 && hyst != 200000) {
245
+		dev_err(tps->dev,
246
+			"Invalid ti,under-voltage-hyst-microvolt value\n");
247
+		return -EINVAL;
248
+	}
249
+
250
+	tps65218_update_bits(tps, TPS65218_REG_CONFIG2,
251
+			     TPS65218_CONFIG2_UVLOHYS,
252
+			     hyst == 400000 ? TPS65218_CONFIG2_UVLOHYS : 0,
253
+			     TPS65218_PROTECT_L1);
254
+	return 0;
255
+}
256
+
257
+static int tps65218_voltage_set_uvlo(struct tps65218 *tps)
258
+{
259
+	u32 uvlo;
260
+	int uvloval;
261
+
262
+	if (of_property_read_u32(tps->dev->of_node,
263
+				 "ti,under-voltage-limit-microvolt", &uvlo))
264
+		return 0;
265
+
266
+	switch (uvlo) {
267
+	case 2750000:
268
+		uvloval = TPS65218_CONFIG1_UVLO_2750000;
269
+		break;
270
+	case 2950000:
271
+		uvloval = TPS65218_CONFIG1_UVLO_2950000;
272
+		break;
273
+	case 3250000:
274
+		uvloval = TPS65218_CONFIG1_UVLO_3250000;
275
+		break;
276
+	case 3350000:
277
+		uvloval = TPS65218_CONFIG1_UVLO_3350000;
278
+		break;
279
+	default:
280
+		dev_err(tps->dev,
281
+			"Invalid ti,under-voltage-limit-microvolt value\n");
282
+		return -EINVAL;
283
+	}
284
+
285
+	tps65218_update_bits(tps, TPS65218_REG_CONFIG1,
286
+			     TPS65218_CONFIG1_UVLO_MASK, uvloval,
287
+			     TPS65218_PROTECT_L1);
288
+	return 0;
289
+}
290
+
214
291
 static int tps65218_probe(struct i2c_client *client,
215
292
 				const struct i2c_device_id *ids)
216
293
 {
..
..
@@ -249,6 +326,18 @@
249
326
 
250
327
 	tps->rev = chipid & TPS65218_CHIPID_REV_MASK;
251
328
 
329
+	ret = tps65218_voltage_set_strict(tps);
330
+	if (ret)
331
+		return ret;
332
+
333
+	ret = tps65218_voltage_set_uvlo(tps);
334
+	if (ret)
335
+		return ret;
336
+
337
+	ret = tps65218_voltage_set_uv_hyst(tps);
338
+	if (ret)
339
+		return ret;
340
+
252
341
 	ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65218_cells,
253
342
 			      ARRAY_SIZE(tps65218_cells), NULL, 0,
254
343
 			      regmap_irq_get_domain(tps->irq_data));