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2024-01-04 1543e317f1da31b75942316931e8f491a8920811 
 kernel/drivers/iio/dac/ltc2632.c
....@@ -1,10 +1,9 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * LTC2632 Digital to analog convertors spi driver
34  *
45  * Copyright 2017 Maxime Roussin-Bélanger
56  * expanded by Silvan Murer <silvan.murer@gmail.com>
6
- *
7
- * Licensed under the GPL-2.
87  */
98 
109 #include <linux/device.h>
....@@ -13,10 +12,7 @@
1312 #include <linux/iio/iio.h>
1413 #include <linux/regulator/consumer.h>
1514 
16
-#define LTC2632_DAC_CHANNELS                    2
17
-
18
-#define LTC2632_ADDR_DAC0                       0x0
19
-#define LTC2632_ADDR_DAC1                       0x1
15
+#include <asm/unaligned.h>
2016 
2117 #define LTC2632_CMD_WRITE_INPUT_N               0x0
2218 #define LTC2632_CMD_UPDATE_DAC_N                0x1
....@@ -30,19 +26,21 @@
3026 /**
3127  * struct ltc2632_chip_info - chip specific information
3228  * @channels:		channel spec for the DAC
29
+ * @num_channels:	DAC channel count of the chip
3330  * @vref_mv:		internal reference voltage
3431  */
3532 struct ltc2632_chip_info {
3633 	const struct iio_chan_spec *channels;
34
+	const size_t num_channels;
3735 	const int vref_mv;
3836 };
3937 
4038 /**
4139  * struct ltc2632_state - driver instance specific data
4240  * @spi_dev:			pointer to the spi_device struct
43
- * @powerdown_cache_mask	used to show current channel powerdown state
44
- * @vref_mv			used reference voltage (internal or external)
45
- * @vref_reg		regulator for the reference voltage
41
+ * @powerdown_cache_mask:	used to show current channel powerdown state
42
+ * @vref_mv:			used reference voltage (internal or external)
43
+ * @vref_reg:		regulator for the reference voltage
4644  */
4745 struct ltc2632_state {
4846 	struct spi_device *spi_dev;
....@@ -58,6 +56,18 @@
5856 	ID_LTC2632H12,
5957 	ID_LTC2632H10,
6058 	ID_LTC2632H8,
59
+	ID_LTC2634L12,
60
+	ID_LTC2634L10,
61
+	ID_LTC2634L8,
62
+	ID_LTC2634H12,
63
+	ID_LTC2634H10,
64
+	ID_LTC2634H8,
65
+	ID_LTC2636L12,
66
+	ID_LTC2636L10,
67
+	ID_LTC2636L8,
68
+	ID_LTC2636H12,
69
+	ID_LTC2636H10,
70
+	ID_LTC2636H8,
6171 };
6272 
6373 static int ltc2632_spi_write(struct spi_device *spi,
....@@ -74,9 +84,7 @@
7484 	 * 10-, 8-bit input code followed by 4, 6, or 8 don't care bits.
7585 	 */
7686 	data = (cmd << 20) | (addr << 16) | (val << shift);
77
-	msg[0] = data >> 16;
78
-	msg[1] = data >> 8;
79
-	msg[2] = data;
87
+	put_unaligned_be24(data, &msg[0]);
8088 
8189 	return spi_write(spi, msg, sizeof(msg));
8290 }
....@@ -191,39 +199,107 @@
191199 	const struct iio_chan_spec _name ## _channels[] = { \
192200 		LTC2632_CHANNEL(0, _bits), \
193201 		LTC2632_CHANNEL(1, _bits), \
202
+		LTC2632_CHANNEL(2, _bits), \
203
+		LTC2632_CHANNEL(3, _bits), \
204
+		LTC2632_CHANNEL(4, _bits), \
205
+		LTC2632_CHANNEL(5, _bits), \
206
+		LTC2632_CHANNEL(6, _bits), \
207
+		LTC2632_CHANNEL(7, _bits), \
194208 	}
195209 
196
-static DECLARE_LTC2632_CHANNELS(ltc2632l12, 12);
197
-static DECLARE_LTC2632_CHANNELS(ltc2632l10, 10);
198
-static DECLARE_LTC2632_CHANNELS(ltc2632l8, 8);
199
-
200
-static DECLARE_LTC2632_CHANNELS(ltc2632h12, 12);
201
-static DECLARE_LTC2632_CHANNELS(ltc2632h10, 10);
202
-static DECLARE_LTC2632_CHANNELS(ltc2632h8, 8);
210
+static DECLARE_LTC2632_CHANNELS(ltc2632x12, 12);
211
+static DECLARE_LTC2632_CHANNELS(ltc2632x10, 10);
212
+static DECLARE_LTC2632_CHANNELS(ltc2632x8, 8);
203213 
204214 static const struct ltc2632_chip_info ltc2632_chip_info_tbl[] = {
205215 	[ID_LTC2632L12] = {
206
-		.channels	= ltc2632l12_channels,
216
+		.channels	= ltc2632x12_channels,
217
+		.num_channels	= 2,
207218 		.vref_mv	= 2500,
208219 	},
209220 	[ID_LTC2632L10] = {
210
-		.channels	= ltc2632l10_channels,
221
+		.channels	= ltc2632x10_channels,
222
+		.num_channels	= 2,
211223 		.vref_mv	= 2500,
212224 	},
213225 	[ID_LTC2632L8] =  {
214
-		.channels	= ltc2632l8_channels,
226
+		.channels	= ltc2632x8_channels,
227
+		.num_channels	= 2,
215228 		.vref_mv	= 2500,
216229 	},
217230 	[ID_LTC2632H12] = {
218
-		.channels	= ltc2632h12_channels,
231
+		.channels	= ltc2632x12_channels,
232
+		.num_channels	= 2,
219233 		.vref_mv	= 4096,
220234 	},
221235 	[ID_LTC2632H10] = {
222
-		.channels	= ltc2632h10_channels,
236
+		.channels	= ltc2632x10_channels,
237
+		.num_channels	= 2,
223238 		.vref_mv	= 4096,
224239 	},
225240 	[ID_LTC2632H8] =  {
226
-		.channels	= ltc2632h8_channels,
241
+		.channels	= ltc2632x8_channels,
242
+		.num_channels	= 2,
243
+		.vref_mv	= 4096,
244
+	},
245
+	[ID_LTC2634L12] = {
246
+		.channels	= ltc2632x12_channels,
247
+		.num_channels	= 4,
248
+		.vref_mv	= 2500,
249
+	},
250
+	[ID_LTC2634L10] = {
251
+		.channels	= ltc2632x10_channels,
252
+		.num_channels	= 4,
253
+		.vref_mv	= 2500,
254
+	},
255
+	[ID_LTC2634L8] =  {
256
+		.channels	= ltc2632x8_channels,
257
+		.num_channels	= 4,
258
+		.vref_mv	= 2500,
259
+	},
260
+	[ID_LTC2634H12] = {
261
+		.channels	= ltc2632x12_channels,
262
+		.num_channels	= 4,
263
+		.vref_mv	= 4096,
264
+	},
265
+	[ID_LTC2634H10] = {
266
+		.channels	= ltc2632x10_channels,
267
+		.num_channels	= 4,
268
+		.vref_mv	= 4096,
269
+	},
270
+	[ID_LTC2634H8] =  {
271
+		.channels	= ltc2632x8_channels,
272
+		.num_channels	= 4,
273
+		.vref_mv	= 4096,
274
+	},
275
+	[ID_LTC2636L12] = {
276
+		.channels	= ltc2632x12_channels,
277
+		.num_channels	= 8,
278
+		.vref_mv	= 2500,
279
+	},
280
+	[ID_LTC2636L10] = {
281
+		.channels	= ltc2632x10_channels,
282
+		.num_channels	= 8,
283
+		.vref_mv	= 2500,
284
+	},
285
+	[ID_LTC2636L8] =  {
286
+		.channels	= ltc2632x8_channels,
287
+		.num_channels	= 8,
288
+		.vref_mv	= 2500,
289
+	},
290
+	[ID_LTC2636H12] = {
291
+		.channels	= ltc2632x12_channels,
292
+		.num_channels	= 8,
293
+		.vref_mv	= 4096,
294
+	},
295
+	[ID_LTC2636H10] = {
296
+		.channels	= ltc2632x10_channels,
297
+		.num_channels	= 8,
298
+		.vref_mv	= 4096,
299
+	},
300
+	[ID_LTC2636H8] =  {
301
+		.channels	= ltc2632x8_channels,
302
+		.num_channels	= 8,
227303 		.vref_mv	= 4096,
228304 	},
229305 };
....@@ -286,13 +362,12 @@
286362 		}
287363 	}
288364 
289
-	indio_dev->dev.parent = &spi->dev;
290365 	indio_dev->name = dev_of_node(&spi->dev) ? dev_of_node(&spi->dev)->name
291366 						 : spi_get_device_id(spi)->name;
292367 	indio_dev->info = &ltc2632_info;
293368 	indio_dev->modes = INDIO_DIRECT_MODE;
294369 	indio_dev->channels = chip_info->channels;
295
-	indio_dev->num_channels = LTC2632_DAC_CHANNELS;
370
+	indio_dev->num_channels = chip_info->num_channels;
296371 
297372 	return iio_device_register(indio_dev);
298373 }
....@@ -317,6 +392,18 @@
317392 	{ "ltc2632-h12", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2632H12] },
318393 	{ "ltc2632-h10", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2632H10] },
319394 	{ "ltc2632-h8", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2632H8] },
395
+	{ "ltc2634-l12", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2634L12] },
396
+	{ "ltc2634-l10", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2634L10] },
397
+	{ "ltc2634-l8", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2634L8] },
398
+	{ "ltc2634-h12", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2634H12] },
399
+	{ "ltc2634-h10", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2634H10] },
400
+	{ "ltc2634-h8", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2634H8] },
401
+	{ "ltc2636-l12", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2636L12] },
402
+	{ "ltc2636-l10", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2636L10] },
403
+	{ "ltc2636-l8", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2636L8] },
404
+	{ "ltc2636-h12", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2636H12] },
405
+	{ "ltc2636-h10", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2636H10] },
406
+	{ "ltc2636-h8", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2636H8] },
320407 	{}
321408 };
322409 MODULE_DEVICE_TABLE(spi, ltc2632_id);
....@@ -340,6 +427,42 @@
340427 	}, {
341428 		.compatible = "lltc,ltc2632-h8",
342429 		.data = &ltc2632_chip_info_tbl[ID_LTC2632H8]
430
+	}, {
431
+		.compatible = "lltc,ltc2634-l12",
432
+		.data = &ltc2632_chip_info_tbl[ID_LTC2634L12]
433
+	}, {
434
+		.compatible = "lltc,ltc2634-l10",
435
+		.data = &ltc2632_chip_info_tbl[ID_LTC2634L10]
436
+	}, {
437
+		.compatible = "lltc,ltc2634-l8",
438
+		.data = &ltc2632_chip_info_tbl[ID_LTC2634L8]
439
+	}, {
440
+		.compatible = "lltc,ltc2634-h12",
441
+		.data = &ltc2632_chip_info_tbl[ID_LTC2634H12]
442
+	}, {
443
+		.compatible = "lltc,ltc2634-h10",
444
+		.data = &ltc2632_chip_info_tbl[ID_LTC2634H10]
445
+	}, {
446
+		.compatible = "lltc,ltc2634-h8",
447
+		.data = &ltc2632_chip_info_tbl[ID_LTC2634H8]
448
+	}, {
449
+		.compatible = "lltc,ltc2636-l12",
450
+		.data = &ltc2632_chip_info_tbl[ID_LTC2636L12]
451
+	}, {
452
+		.compatible = "lltc,ltc2636-l10",
453
+		.data = &ltc2632_chip_info_tbl[ID_LTC2636L10]
454
+	}, {
455
+		.compatible = "lltc,ltc2636-l8",
456
+		.data = &ltc2632_chip_info_tbl[ID_LTC2636L8]
457
+	}, {
458
+		.compatible = "lltc,ltc2636-h12",
459
+		.data = &ltc2632_chip_info_tbl[ID_LTC2636H12]
460
+	}, {
461
+		.compatible = "lltc,ltc2636-h10",
462
+		.data = &ltc2632_chip_info_tbl[ID_LTC2636H10]
463
+	}, {
464
+		.compatible = "lltc,ltc2636-h8",
465
+		.data = &ltc2632_chip_info_tbl[ID_LTC2636H8]
343466 	},
344467 	{}
345468 };