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Commit | Line | Data |
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a8e510f6 | 1 | /* |
240a12d5 | 2 | * SPI driver for Micrel/Kendin KS8995M and KSZ8864RMN ethernet switches |
a8e510f6 FL |
3 | * |
4 | * Copyright (C) 2008 Gabor Juhos <juhosg at openwrt.org> | |
5 | * | |
6 | * This file was based on: drivers/spi/at25.c | |
7 | * Copyright (C) 2006 David Brownell | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License version 2 as published | |
11 | * by the Free Software Foundation. | |
12 | */ | |
13 | ||
8d242488 JP |
14 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
15 | ||
a8e510f6 FL |
16 | #include <linux/types.h> |
17 | #include <linux/kernel.h> | |
a8e510f6 FL |
18 | #include <linux/module.h> |
19 | #include <linux/delay.h> | |
20 | #include <linux/device.h> | |
27090cbd | 21 | #include <linux/gpio/consumer.h> |
cd6f288c | 22 | #include <linux/of.h> |
cd6f288c | 23 | #include <linux/of_gpio.h> |
a8e510f6 FL |
24 | |
25 | #include <linux/spi/spi.h> | |
26 | ||
27 | #define DRV_VERSION "0.1.1" | |
28 | #define DRV_DESC "Micrel KS8995 Ethernet switch SPI driver" | |
29 | ||
30 | /* ------------------------------------------------------------------------ */ | |
31 | ||
32 | #define KS8995_REG_ID0 0x00 /* Chip ID0 */ | |
33 | #define KS8995_REG_ID1 0x01 /* Chip ID1 */ | |
34 | ||
35 | #define KS8995_REG_GC0 0x02 /* Global Control 0 */ | |
36 | #define KS8995_REG_GC1 0x03 /* Global Control 1 */ | |
37 | #define KS8995_REG_GC2 0x04 /* Global Control 2 */ | |
38 | #define KS8995_REG_GC3 0x05 /* Global Control 3 */ | |
39 | #define KS8995_REG_GC4 0x06 /* Global Control 4 */ | |
40 | #define KS8995_REG_GC5 0x07 /* Global Control 5 */ | |
41 | #define KS8995_REG_GC6 0x08 /* Global Control 6 */ | |
42 | #define KS8995_REG_GC7 0x09 /* Global Control 7 */ | |
43 | #define KS8995_REG_GC8 0x0a /* Global Control 8 */ | |
44 | #define KS8995_REG_GC9 0x0b /* Global Control 9 */ | |
45 | ||
46 | #define KS8995_REG_PC(p, r) ((0x10 * p) + r) /* Port Control */ | |
47 | #define KS8995_REG_PS(p, r) ((0x10 * p) + r + 0xe) /* Port Status */ | |
48 | ||
49 | #define KS8995_REG_TPC0 0x60 /* TOS Priority Control 0 */ | |
50 | #define KS8995_REG_TPC1 0x61 /* TOS Priority Control 1 */ | |
51 | #define KS8995_REG_TPC2 0x62 /* TOS Priority Control 2 */ | |
52 | #define KS8995_REG_TPC3 0x63 /* TOS Priority Control 3 */ | |
53 | #define KS8995_REG_TPC4 0x64 /* TOS Priority Control 4 */ | |
54 | #define KS8995_REG_TPC5 0x65 /* TOS Priority Control 5 */ | |
55 | #define KS8995_REG_TPC6 0x66 /* TOS Priority Control 6 */ | |
56 | #define KS8995_REG_TPC7 0x67 /* TOS Priority Control 7 */ | |
57 | ||
58 | #define KS8995_REG_MAC0 0x68 /* MAC address 0 */ | |
59 | #define KS8995_REG_MAC1 0x69 /* MAC address 1 */ | |
60 | #define KS8995_REG_MAC2 0x6a /* MAC address 2 */ | |
61 | #define KS8995_REG_MAC3 0x6b /* MAC address 3 */ | |
62 | #define KS8995_REG_MAC4 0x6c /* MAC address 4 */ | |
63 | #define KS8995_REG_MAC5 0x6d /* MAC address 5 */ | |
64 | ||
65 | #define KS8995_REG_IAC0 0x6e /* Indirect Access Control 0 */ | |
66 | #define KS8995_REG_IAC1 0x6f /* Indirect Access Control 0 */ | |
67 | #define KS8995_REG_IAD7 0x70 /* Indirect Access Data 7 */ | |
68 | #define KS8995_REG_IAD6 0x71 /* Indirect Access Data 6 */ | |
69 | #define KS8995_REG_IAD5 0x72 /* Indirect Access Data 5 */ | |
70 | #define KS8995_REG_IAD4 0x73 /* Indirect Access Data 4 */ | |
71 | #define KS8995_REG_IAD3 0x74 /* Indirect Access Data 3 */ | |
72 | #define KS8995_REG_IAD2 0x75 /* Indirect Access Data 2 */ | |
73 | #define KS8995_REG_IAD1 0x76 /* Indirect Access Data 1 */ | |
74 | #define KS8995_REG_IAD0 0x77 /* Indirect Access Data 0 */ | |
75 | ||
240a12d5 PZ |
76 | #define KSZ8864_REG_ID1 0xfe /* Chip ID in bit 7 */ |
77 | ||
a8e510f6 | 78 | #define KS8995_REGS_SIZE 0x80 |
240a12d5 | 79 | #define KSZ8864_REGS_SIZE 0x100 |
c0e6cb1f | 80 | #define KSZ8795_REGS_SIZE 0x100 |
a8e510f6 FL |
81 | |
82 | #define ID1_CHIPID_M 0xf | |
83 | #define ID1_CHIPID_S 4 | |
84 | #define ID1_REVISION_M 0x7 | |
85 | #define ID1_REVISION_S 1 | |
86 | #define ID1_START_SW 1 /* start the switch */ | |
87 | ||
88 | #define FAMILY_KS8995 0x95 | |
c0e6cb1f | 89 | #define FAMILY_KSZ8795 0x87 |
a8e510f6 | 90 | #define CHIPID_M 0 |
484e36ff HB |
91 | #define KS8995_CHIP_ID 0x00 |
92 | #define KSZ8864_CHIP_ID 0x01 | |
c0e6cb1f | 93 | #define KSZ8795_CHIP_ID 0x09 |
a8e510f6 FL |
94 | |
95 | #define KS8995_CMD_WRITE 0x02U | |
96 | #define KS8995_CMD_READ 0x03U | |
97 | ||
98 | #define KS8995_RESET_DELAY 10 /* usec */ | |
99 | ||
aa54c8da HB |
100 | enum ks8995_chip_variant { |
101 | ks8995, | |
102 | ksz8864, | |
c0e6cb1f | 103 | ksz8795, |
aa54c8da HB |
104 | max_variant |
105 | }; | |
106 | ||
107 | struct ks8995_chip_params { | |
108 | char *name; | |
484e36ff HB |
109 | int family_id; |
110 | int chip_id; | |
aa54c8da | 111 | int regs_size; |
6665e623 HB |
112 | int addr_width; |
113 | int addr_shift; | |
aa54c8da HB |
114 | }; |
115 | ||
116 | static const struct ks8995_chip_params ks8995_chip[] = { | |
117 | [ks8995] = { | |
118 | .name = "KS8995MA", | |
484e36ff HB |
119 | .family_id = FAMILY_KS8995, |
120 | .chip_id = KS8995_CHIP_ID, | |
aa54c8da | 121 | .regs_size = KS8995_REGS_SIZE, |
6665e623 HB |
122 | .addr_width = 8, |
123 | .addr_shift = 0, | |
aa54c8da HB |
124 | }, |
125 | [ksz8864] = { | |
126 | .name = "KSZ8864RMN", | |
484e36ff HB |
127 | .family_id = FAMILY_KS8995, |
128 | .chip_id = KSZ8864_CHIP_ID, | |
aa54c8da | 129 | .regs_size = KSZ8864_REGS_SIZE, |
6665e623 HB |
130 | .addr_width = 8, |
131 | .addr_shift = 0, | |
aa54c8da | 132 | }, |
c0e6cb1f HB |
133 | [ksz8795] = { |
134 | .name = "KSZ8795CLX", | |
135 | .family_id = FAMILY_KSZ8795, | |
136 | .chip_id = KSZ8795_CHIP_ID, | |
137 | .regs_size = KSZ8795_REGS_SIZE, | |
138 | .addr_width = 12, | |
139 | .addr_shift = 1, | |
140 | }, | |
aa54c8da HB |
141 | }; |
142 | ||
a8e510f6 | 143 | struct ks8995_pdata { |
cd6f288c HB |
144 | int reset_gpio; |
145 | enum of_gpio_flags reset_gpio_flags; | |
a8e510f6 FL |
146 | }; |
147 | ||
148 | struct ks8995_switch { | |
149 | struct spi_device *spi; | |
150 | struct mutex lock; | |
151 | struct ks8995_pdata *pdata; | |
240a12d5 | 152 | struct bin_attribute regs_attr; |
aa54c8da | 153 | const struct ks8995_chip_params *chip; |
484e36ff | 154 | int revision_id; |
a8e510f6 FL |
155 | }; |
156 | ||
aa54c8da HB |
157 | static const struct spi_device_id ks8995_id[] = { |
158 | {"ks8995", ks8995}, | |
159 | {"ksz8864", ksz8864}, | |
c0e6cb1f | 160 | {"ksz8795", ksz8795}, |
aa54c8da HB |
161 | { } |
162 | }; | |
163 | MODULE_DEVICE_TABLE(spi, ks8995_id); | |
164 | ||
a8e510f6 FL |
165 | static inline u8 get_chip_id(u8 val) |
166 | { | |
167 | return (val >> ID1_CHIPID_S) & ID1_CHIPID_M; | |
168 | } | |
169 | ||
170 | static inline u8 get_chip_rev(u8 val) | |
171 | { | |
172 | return (val >> ID1_REVISION_S) & ID1_REVISION_M; | |
173 | } | |
174 | ||
6665e623 HB |
175 | /* create_spi_cmd - create a chip specific SPI command header |
176 | * @ks: pointer to switch instance | |
177 | * @cmd: SPI command for switch | |
178 | * @address: register address for command | |
179 | * | |
180 | * Different chip families use different bit pattern to address the switches | |
181 | * registers: | |
182 | * | |
183 | * KS8995: 8bit command + 8bit address | |
184 | * KSZ8795: 3bit command + 12bit address + 1bit TR (?) | |
185 | */ | |
186 | static inline __be16 create_spi_cmd(struct ks8995_switch *ks, int cmd, | |
187 | unsigned address) | |
188 | { | |
189 | u16 result = cmd; | |
190 | ||
191 | /* make room for address (incl. address shift) */ | |
192 | result <<= ks->chip->addr_width + ks->chip->addr_shift; | |
193 | /* add address */ | |
194 | result |= address << ks->chip->addr_shift; | |
195 | /* SPI protocol needs big endian */ | |
196 | return cpu_to_be16(result); | |
197 | } | |
a8e510f6 FL |
198 | /* ------------------------------------------------------------------------ */ |
199 | static int ks8995_read(struct ks8995_switch *ks, char *buf, | |
200 | unsigned offset, size_t count) | |
201 | { | |
6665e623 | 202 | __be16 cmd; |
a8e510f6 FL |
203 | struct spi_transfer t[2]; |
204 | struct spi_message m; | |
205 | int err; | |
206 | ||
6665e623 | 207 | cmd = create_spi_cmd(ks, KS8995_CMD_READ, offset); |
a8e510f6 FL |
208 | spi_message_init(&m); |
209 | ||
210 | memset(&t, 0, sizeof(t)); | |
211 | ||
6665e623 | 212 | t[0].tx_buf = &cmd; |
a8e510f6 FL |
213 | t[0].len = sizeof(cmd); |
214 | spi_message_add_tail(&t[0], &m); | |
215 | ||
216 | t[1].rx_buf = buf; | |
217 | t[1].len = count; | |
218 | spi_message_add_tail(&t[1], &m); | |
219 | ||
a8e510f6 FL |
220 | mutex_lock(&ks->lock); |
221 | err = spi_sync(ks->spi, &m); | |
222 | mutex_unlock(&ks->lock); | |
223 | ||
224 | return err ? err : count; | |
225 | } | |
226 | ||
a8e510f6 FL |
227 | static int ks8995_write(struct ks8995_switch *ks, char *buf, |
228 | unsigned offset, size_t count) | |
229 | { | |
6665e623 | 230 | __be16 cmd; |
a8e510f6 FL |
231 | struct spi_transfer t[2]; |
232 | struct spi_message m; | |
233 | int err; | |
234 | ||
6665e623 | 235 | cmd = create_spi_cmd(ks, KS8995_CMD_WRITE, offset); |
a8e510f6 FL |
236 | spi_message_init(&m); |
237 | ||
238 | memset(&t, 0, sizeof(t)); | |
239 | ||
6665e623 | 240 | t[0].tx_buf = &cmd; |
a8e510f6 FL |
241 | t[0].len = sizeof(cmd); |
242 | spi_message_add_tail(&t[0], &m); | |
243 | ||
244 | t[1].tx_buf = buf; | |
245 | t[1].len = count; | |
246 | spi_message_add_tail(&t[1], &m); | |
247 | ||
a8e510f6 FL |
248 | mutex_lock(&ks->lock); |
249 | err = spi_sync(ks->spi, &m); | |
250 | mutex_unlock(&ks->lock); | |
251 | ||
252 | return err ? err : count; | |
253 | } | |
254 | ||
255 | static inline int ks8995_read_reg(struct ks8995_switch *ks, u8 addr, u8 *buf) | |
256 | { | |
7aff9675 | 257 | return ks8995_read(ks, buf, addr, 1) != 1; |
a8e510f6 FL |
258 | } |
259 | ||
260 | static inline int ks8995_write_reg(struct ks8995_switch *ks, u8 addr, u8 val) | |
261 | { | |
262 | char buf = val; | |
263 | ||
7aff9675 | 264 | return ks8995_write(ks, &buf, addr, 1) != 1; |
a8e510f6 FL |
265 | } |
266 | ||
267 | /* ------------------------------------------------------------------------ */ | |
268 | ||
269 | static int ks8995_stop(struct ks8995_switch *ks) | |
270 | { | |
271 | return ks8995_write_reg(ks, KS8995_REG_ID1, 0); | |
272 | } | |
273 | ||
274 | static int ks8995_start(struct ks8995_switch *ks) | |
275 | { | |
276 | return ks8995_write_reg(ks, KS8995_REG_ID1, 1); | |
277 | } | |
278 | ||
279 | static int ks8995_reset(struct ks8995_switch *ks) | |
280 | { | |
281 | int err; | |
282 | ||
283 | err = ks8995_stop(ks); | |
284 | if (err) | |
285 | return err; | |
286 | ||
287 | udelay(KS8995_RESET_DELAY); | |
288 | ||
289 | return ks8995_start(ks); | |
290 | } | |
291 | ||
a8e510f6 FL |
292 | static ssize_t ks8995_registers_read(struct file *filp, struct kobject *kobj, |
293 | struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) | |
294 | { | |
295 | struct device *dev; | |
296 | struct ks8995_switch *ks8995; | |
297 | ||
298 | dev = container_of(kobj, struct device, kobj); | |
299 | ks8995 = dev_get_drvdata(dev); | |
300 | ||
a8e510f6 FL |
301 | return ks8995_read(ks8995, buf, off, count); |
302 | } | |
303 | ||
a8e510f6 FL |
304 | static ssize_t ks8995_registers_write(struct file *filp, struct kobject *kobj, |
305 | struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) | |
306 | { | |
307 | struct device *dev; | |
308 | struct ks8995_switch *ks8995; | |
309 | ||
310 | dev = container_of(kobj, struct device, kobj); | |
311 | ks8995 = dev_get_drvdata(dev); | |
312 | ||
a8e510f6 FL |
313 | return ks8995_write(ks8995, buf, off, count); |
314 | } | |
315 | ||
484e36ff HB |
316 | /* ks8995_get_revision - get chip revision |
317 | * @ks: pointer to switch instance | |
318 | * | |
319 | * Verify chip family and id and get chip revision. | |
320 | */ | |
321 | static int ks8995_get_revision(struct ks8995_switch *ks) | |
322 | { | |
323 | int err; | |
324 | u8 id0, id1, ksz8864_id; | |
325 | ||
326 | /* read family id */ | |
327 | err = ks8995_read_reg(ks, KS8995_REG_ID0, &id0); | |
328 | if (err) { | |
329 | err = -EIO; | |
330 | goto err_out; | |
331 | } | |
332 | ||
333 | /* verify family id */ | |
334 | if (id0 != ks->chip->family_id) { | |
335 | dev_err(&ks->spi->dev, "chip family id mismatch: expected 0x%02x but 0x%02x read\n", | |
336 | ks->chip->family_id, id0); | |
337 | err = -ENODEV; | |
338 | goto err_out; | |
339 | } | |
340 | ||
341 | switch (ks->chip->family_id) { | |
342 | case FAMILY_KS8995: | |
343 | /* try reading chip id at CHIP ID1 */ | |
344 | err = ks8995_read_reg(ks, KS8995_REG_ID1, &id1); | |
345 | if (err) { | |
346 | err = -EIO; | |
347 | goto err_out; | |
348 | } | |
349 | ||
350 | /* verify chip id */ | |
351 | if ((get_chip_id(id1) == CHIPID_M) && | |
352 | (get_chip_id(id1) == ks->chip->chip_id)) { | |
353 | /* KS8995MA */ | |
354 | ks->revision_id = get_chip_rev(id1); | |
355 | } else if (get_chip_id(id1) != CHIPID_M) { | |
356 | /* KSZ8864RMN */ | |
357 | err = ks8995_read_reg(ks, KS8995_REG_ID1, &ksz8864_id); | |
358 | if (err) { | |
359 | err = -EIO; | |
360 | goto err_out; | |
361 | } | |
362 | ||
363 | if ((ksz8864_id & 0x80) && | |
364 | (ks->chip->chip_id == KSZ8864_CHIP_ID)) { | |
365 | ks->revision_id = get_chip_rev(id1); | |
366 | } | |
367 | ||
368 | } else { | |
369 | dev_err(&ks->spi->dev, "unsupported chip id for KS8995 family: 0x%02x\n", | |
370 | id1); | |
371 | err = -ENODEV; | |
372 | } | |
373 | break; | |
c0e6cb1f HB |
374 | case FAMILY_KSZ8795: |
375 | /* try reading chip id at CHIP ID1 */ | |
376 | err = ks8995_read_reg(ks, KS8995_REG_ID1, &id1); | |
377 | if (err) { | |
378 | err = -EIO; | |
379 | goto err_out; | |
380 | } | |
381 | ||
382 | if (get_chip_id(id1) == ks->chip->chip_id) { | |
383 | ks->revision_id = get_chip_rev(id1); | |
384 | } else { | |
385 | dev_err(&ks->spi->dev, "unsupported chip id for KSZ8795 family: 0x%02x\n", | |
386 | id1); | |
387 | err = -ENODEV; | |
388 | } | |
389 | break; | |
484e36ff HB |
390 | default: |
391 | dev_err(&ks->spi->dev, "unsupported family id: 0x%02x\n", id0); | |
392 | err = -ENODEV; | |
393 | break; | |
394 | } | |
395 | err_out: | |
396 | return err; | |
397 | } | |
398 | ||
cd6f288c HB |
399 | /* ks8995_parse_dt - setup platform data from devicetree |
400 | * @ks: pointer to switch instance | |
401 | * | |
402 | * Parses supported DT properties and sets up platform data | |
403 | * accordingly. | |
404 | */ | |
405 | static void ks8995_parse_dt(struct ks8995_switch *ks) | |
406 | { | |
407 | struct device_node *np = ks->spi->dev.of_node; | |
408 | struct ks8995_pdata *pdata = ks->pdata; | |
409 | ||
410 | if (!np) | |
411 | return; | |
412 | ||
413 | pdata->reset_gpio = of_get_named_gpio_flags(np, "reset-gpios", 0, | |
414 | &pdata->reset_gpio_flags); | |
415 | } | |
416 | ||
240a12d5 | 417 | static const struct bin_attribute ks8995_registers_attr = { |
a8e510f6 FL |
418 | .attr = { |
419 | .name = "registers", | |
420 | .mode = S_IRUSR | S_IWUSR, | |
421 | }, | |
422 | .size = KS8995_REGS_SIZE, | |
423 | .read = ks8995_registers_read, | |
424 | .write = ks8995_registers_write, | |
425 | }; | |
426 | ||
427 | /* ------------------------------------------------------------------------ */ | |
633d1594 | 428 | static int ks8995_probe(struct spi_device *spi) |
a8e510f6 | 429 | { |
cd6f288c HB |
430 | struct ks8995_switch *ks; |
431 | int err; | |
aa54c8da | 432 | int variant = spi_get_device_id(spi)->driver_data; |
a8e510f6 | 433 | |
aa54c8da HB |
434 | if (variant >= max_variant) { |
435 | dev_err(&spi->dev, "bad chip variant %d\n", variant); | |
436 | return -ENODEV; | |
437 | } | |
438 | ||
b32a8b64 | 439 | ks = devm_kzalloc(&spi->dev, sizeof(*ks), GFP_KERNEL); |
e68ed8f0 | 440 | if (!ks) |
a8e510f6 | 441 | return -ENOMEM; |
a8e510f6 FL |
442 | |
443 | mutex_init(&ks->lock); | |
a1459c1c | 444 | ks->spi = spi; |
aa54c8da HB |
445 | ks->chip = &ks8995_chip[variant]; |
446 | ||
cd6f288c HB |
447 | if (ks->spi->dev.of_node) { |
448 | ks->pdata = devm_kzalloc(&spi->dev, sizeof(*ks->pdata), | |
449 | GFP_KERNEL); | |
450 | if (!ks->pdata) | |
451 | return -ENOMEM; | |
452 | ||
453 | ks->pdata->reset_gpio = -1; | |
454 | ||
455 | ks8995_parse_dt(ks); | |
456 | } | |
457 | ||
458 | if (!ks->pdata) | |
459 | ks->pdata = spi->dev.platform_data; | |
460 | ||
461 | /* de-assert switch reset */ | |
462 | if (ks->pdata && gpio_is_valid(ks->pdata->reset_gpio)) { | |
463 | unsigned long flags; | |
464 | ||
465 | flags = (ks->pdata->reset_gpio_flags == OF_GPIO_ACTIVE_LOW ? | |
466 | GPIOF_ACTIVE_LOW : 0); | |
467 | ||
468 | err = devm_gpio_request_one(&spi->dev, | |
469 | ks->pdata->reset_gpio, | |
470 | flags, "switch-reset"); | |
471 | if (err) { | |
472 | dev_err(&spi->dev, | |
473 | "failed to get reset-gpios: %d\n", err); | |
474 | return -EIO; | |
475 | } | |
476 | ||
477 | gpiod_set_value(gpio_to_desc(ks->pdata->reset_gpio), 0); | |
478 | } | |
479 | ||
5d5f1846 | 480 | spi_set_drvdata(spi, ks); |
a8e510f6 FL |
481 | |
482 | spi->mode = SPI_MODE_0; | |
483 | spi->bits_per_word = 8; | |
484 | err = spi_setup(spi); | |
485 | if (err) { | |
486 | dev_err(&spi->dev, "spi_setup failed, err=%d\n", err); | |
b32a8b64 | 487 | return err; |
a8e510f6 FL |
488 | } |
489 | ||
484e36ff HB |
490 | err = ks8995_get_revision(ks); |
491 | if (err) | |
b32a8b64 | 492 | return err; |
a8e510f6 | 493 | |
240a12d5 | 494 | memcpy(&ks->regs_attr, &ks8995_registers_attr, sizeof(ks->regs_attr)); |
239870f2 | 495 | ks->regs_attr.size = ks->chip->regs_size; |
240a12d5 | 496 | |
a8e510f6 FL |
497 | err = ks8995_reset(ks); |
498 | if (err) | |
b32a8b64 | 499 | return err; |
a8e510f6 | 500 | |
4342696d | 501 | sysfs_attr_init(&ks->regs_attr.attr); |
240a12d5 | 502 | err = sysfs_create_bin_file(&spi->dev.kobj, &ks->regs_attr); |
a8e510f6 FL |
503 | if (err) { |
504 | dev_err(&spi->dev, "unable to create sysfs file, err=%d\n", | |
505 | err); | |
b32a8b64 | 506 | return err; |
a8e510f6 FL |
507 | } |
508 | ||
484e36ff HB |
509 | dev_info(&spi->dev, "%s device found, Chip ID:%x, Revision:%x\n", |
510 | ks->chip->name, ks->chip->chip_id, ks->revision_id); | |
a8e510f6 FL |
511 | |
512 | return 0; | |
a8e510f6 FL |
513 | } |
514 | ||
633d1594 | 515 | static int ks8995_remove(struct spi_device *spi) |
a8e510f6 | 516 | { |
30349bdb VZ |
517 | struct ks8995_switch *ks = spi_get_drvdata(spi); |
518 | ||
519 | sysfs_remove_bin_file(&spi->dev.kobj, &ks->regs_attr); | |
a8e510f6 | 520 | |
cd6f288c HB |
521 | /* assert reset */ |
522 | if (ks->pdata && gpio_is_valid(ks->pdata->reset_gpio)) | |
523 | gpiod_set_value(gpio_to_desc(ks->pdata->reset_gpio), 1); | |
524 | ||
a8e510f6 FL |
525 | return 0; |
526 | } | |
527 | ||
528 | /* ------------------------------------------------------------------------ */ | |
a8e510f6 FL |
529 | static struct spi_driver ks8995_driver = { |
530 | .driver = { | |
531 | .name = "spi-ks8995", | |
a8e510f6 FL |
532 | }, |
533 | .probe = ks8995_probe, | |
633d1594 | 534 | .remove = ks8995_remove, |
aa54c8da | 535 | .id_table = ks8995_id, |
a8e510f6 FL |
536 | }; |
537 | ||
1a9561a3 | 538 | module_spi_driver(ks8995_driver); |
a8e510f6 FL |
539 | |
540 | MODULE_DESCRIPTION(DRV_DESC); | |
541 | MODULE_VERSION(DRV_VERSION); | |
542 | MODULE_AUTHOR("Gabor Juhos <juhosg at openwrt.org>"); | |
543 | MODULE_LICENSE("GPL v2"); |