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Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
wdenk38635852002-08-27 05:55:31 +00002/*
3 * (C) Copyright 2000, 2001
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
wdenk38635852002-08-27 05:55:31 +00005 */
6
d4f5c722005-08-12 21:16:13 +02007/*
8 * Support for read and write access to EEPROM like memory devices. This
9 * includes regular EEPROM as well as FRAM (ferroelectic nonvolaile RAM).
10 * FRAM devices read and write data at bus speed. In particular, there is no
Peter Meerwalde506a002012-02-08 05:31:53 +000011 * write delay. Also, there is no limit imposed on the number of bytes that can
d4f5c722005-08-12 21:16:13 +020012 * be transferred with a single read or write.
Wolfgang Denk6617aae2005-08-19 00:46:54 +020013 *
d4f5c722005-08-12 21:16:13 +020014 * Use the following configuration options to ensure no unneeded performance
15 * degradation (typical for EEPROM) is incured for FRAM memory:
Wolfgang Denk6617aae2005-08-19 00:46:54 +020016 *
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020017 * #define CONFIG_SYS_I2C_FRAM
Tom Rini88cd7d02021-08-17 17:59:45 -040018 * Set CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS to 0
d4f5c722005-08-12 21:16:13 +020019 *
20 */
21
wdenk38635852002-08-27 05:55:31 +000022#include <common.h>
23#include <config.h>
24#include <command.h>
Simon Glasscb3ef682019-11-14 12:57:50 -070025#include <eeprom.h>
wdenk38635852002-08-27 05:55:31 +000026#include <i2c.h>
Nikita Kiryanove7c27292016-04-16 17:55:12 +030027#include <eeprom_layout.h>
Simon Glassc05ed002020-05-10 11:40:11 -060028#include <linux/delay.h>
wdenk38635852002-08-27 05:55:31 +000029
Mario Sixa6e7b772016-04-20 10:44:52 +020030#ifndef I2C_RXTX_LEN
31#define I2C_RXTX_LEN 128
32#endif
33
Marek Vasut6717e3c2015-11-10 20:53:28 +010034#define EEPROM_PAGE_SIZE (1 << CONFIG_SYS_EEPROM_PAGE_WRITE_BITS)
35#define EEPROM_PAGE_OFFSET(x) ((x) & (EEPROM_PAGE_SIZE - 1))
36
Igor Opaniuk2147a162021-02-09 13:52:45 +020037#if CONFIG_IS_ENABLED(DM_I2C)
Marek Vasutce976072020-04-07 13:29:04 +020038static int eeprom_i2c_bus;
Simon Goldschmidt4f256172019-03-26 13:38:52 +010039#endif
40
Marek Vasut52cd47c2015-11-10 20:53:25 +010041__weak int eeprom_write_enable(unsigned dev_addr, int state)
42{
43 return 0;
44}
Marek Vasut4f296d02015-11-10 20:53:18 +010045
Marek Vasut354e3ed2015-11-10 20:53:31 +010046void eeprom_init(int bus)
Marek Vasut4f296d02015-11-10 20:53:18 +010047{
Marek Vasut4f296d02015-11-10 20:53:18 +010048 /* I2C EEPROM */
Igor Opaniuk2147a162021-02-09 13:52:45 +020049#if CONFIG_IS_ENABLED(DM_I2C)
Simon Goldschmidt4f256172019-03-26 13:38:52 +010050 eeprom_i2c_bus = bus;
Tom Rini55dabcc2021-08-18 23:12:24 -040051#elif CONFIG_IS_ENABLED(SYS_I2C_LEGACY)
Marek Vasut354e3ed2015-11-10 20:53:31 +010052 if (bus >= 0)
53 i2c_set_bus_num(bus);
Marek Vasut4f296d02015-11-10 20:53:18 +010054 i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
55#endif
56}
57
Tom Rini88cd7d02021-08-17 17:59:45 -040058/*
59 * for CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 2 (16-bit EEPROM address) offset is
60 * 0x000nxxxx for EEPROM address selectors at n, offset xxxx in EEPROM.
61 *
62 * for CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1 (8-bit EEPROM page address) offset is
63 * 0x00000nxx for EEPROM address selectors and page number at n.
64 */
Marek Vasut02c321c2015-11-10 20:53:24 +010065static int eeprom_addr(unsigned dev_addr, unsigned offset, uchar *addr)
66{
67 unsigned blk_off;
68 int alen;
69
70 blk_off = offset & 0xff; /* block offset */
71#if CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1
72 addr[0] = offset >> 8; /* block number */
73 addr[1] = blk_off; /* block offset */
74 alen = 2;
75#else
76 addr[0] = offset >> 16; /* block number */
77 addr[1] = offset >> 8; /* upper address octet */
78 addr[2] = blk_off; /* lower address octet */
79 alen = 3;
80#endif /* CONFIG_SYS_I2C_EEPROM_ADDR_LEN */
81
82 addr[0] |= dev_addr; /* insert device address */
83
84 return alen;
85}
86
Marek Vasut39b6f982015-11-10 20:53:29 +010087static int eeprom_len(unsigned offset, unsigned end)
88{
89 unsigned len = end - offset;
90
91 /*
92 * For a FRAM device there is no limit on the number of the
Lukasz Majewski35087fb2019-06-09 22:54:38 +020093 * bytes that can be accessed with the single read or write
Marek Vasut39b6f982015-11-10 20:53:29 +010094 * operation.
95 */
96#if !defined(CONFIG_SYS_I2C_FRAM)
97 unsigned blk_off = offset & 0xff;
98 unsigned maxlen = EEPROM_PAGE_SIZE - EEPROM_PAGE_OFFSET(blk_off);
99
100 if (maxlen > I2C_RXTX_LEN)
101 maxlen = I2C_RXTX_LEN;
102
103 if (len > maxlen)
104 len = maxlen;
105#endif
106
107 return len;
108}
109
Marek Vasut91320882015-11-10 20:53:23 +0100110static int eeprom_rw_block(unsigned offset, uchar *addr, unsigned alen,
111 uchar *buffer, unsigned len, bool read)
112{
113 int ret = 0;
114
Igor Opaniuk2147a162021-02-09 13:52:45 +0200115#if CONFIG_IS_ENABLED(DM_I2C)
Lukasz Majewski0c07a9b2018-11-21 23:40:43 +0100116 struct udevice *dev;
117
Simon Goldschmidt4f256172019-03-26 13:38:52 +0100118 ret = i2c_get_chip_for_busnum(eeprom_i2c_bus, addr[0],
Lukasz Majewski0c07a9b2018-11-21 23:40:43 +0100119 alen - 1, &dev);
120 if (ret) {
121 printf("%s: Cannot find udev for a bus %d\n", __func__,
Simon Goldschmidt4f256172019-03-26 13:38:52 +0100122 eeprom_i2c_bus);
Lukasz Majewski0c07a9b2018-11-21 23:40:43 +0100123 return CMD_RET_FAILURE;
124 }
125
126 if (read)
127 ret = dm_i2c_read(dev, offset, buffer, len);
128 else
129 ret = dm_i2c_write(dev, offset, buffer, len);
130
131#else /* Non DM I2C support - will be removed */
Marek Vasut91320882015-11-10 20:53:23 +0100132
133 if (read)
134 ret = i2c_read(addr[0], offset, alen - 1, buffer, len);
135 else
136 ret = i2c_write(addr[0], offset, alen - 1, buffer, len);
Simon Goldschmidt4f256172019-03-26 13:38:52 +0100137#endif /* CONFIG_DM_I2C */
Lukasz Majewski0c07a9b2018-11-21 23:40:43 +0100138 if (ret)
139 ret = CMD_RET_FAILURE;
140
Marek Vasut91320882015-11-10 20:53:23 +0100141 return ret;
142}
143
Marek Vasut1a378892015-11-10 20:53:30 +0100144static int eeprom_rw(unsigned dev_addr, unsigned offset, uchar *buffer,
145 unsigned cnt, bool read)
wdenk38635852002-08-27 05:55:31 +0000146{
147 unsigned end = offset + cnt;
Marek Vasut1a378892015-11-10 20:53:30 +0100148 unsigned alen, len;
wdenk38635852002-08-27 05:55:31 +0000149 int rcode = 0;
Marek Vasut02c321c2015-11-10 20:53:24 +0100150 uchar addr[3];
wdenk38635852002-08-27 05:55:31 +0000151
Marek Vasute3c20422022-02-16 15:27:59 +0100152#if !CONFIG_IS_ENABLED(DM_I2C) && defined(CONFIG_SYS_I2C_EEPROM_BUS)
Simon Goldschmidt4f256172019-03-26 13:38:52 +0100153 eeprom_init(CONFIG_SYS_I2C_EEPROM_BUS);
154#endif
155
wdenk38635852002-08-27 05:55:31 +0000156 while (offset < end) {
Marek Vasut02c321c2015-11-10 20:53:24 +0100157 alen = eeprom_addr(dev_addr, offset, addr);
wdenk38635852002-08-27 05:55:31 +0000158
Marek Vasut39b6f982015-11-10 20:53:29 +0100159 len = eeprom_len(offset, end);
d4f5c722005-08-12 21:16:13 +0200160
Marek Vasut1a378892015-11-10 20:53:30 +0100161 rcode = eeprom_rw_block(offset, addr, alen, buffer, len, read);
Marek Vasut91320882015-11-10 20:53:23 +0100162
wdenk38635852002-08-27 05:55:31 +0000163 buffer += len;
164 offset += len;
Marek Vasut1a378892015-11-10 20:53:30 +0100165
Tom Rini88cd7d02021-08-17 17:59:45 -0400166#if CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS > 0
Marek Vasut1a378892015-11-10 20:53:30 +0100167 if (!read)
168 udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
Tom Rini88cd7d02021-08-17 17:59:45 -0400169#endif
wdenk38635852002-08-27 05:55:31 +0000170 }
d4f5c722005-08-12 21:16:13 +0200171
wdenk38635852002-08-27 05:55:31 +0000172 return rcode;
173}
174
Marek Vasut1a378892015-11-10 20:53:30 +0100175int eeprom_read(unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt)
wdenk38635852002-08-27 05:55:31 +0000176{
Marek Vasut1a378892015-11-10 20:53:30 +0100177 /*
178 * Read data until done or would cross a page boundary.
179 * We must write the address again when changing pages
180 * because the next page may be in a different device.
181 */
182 return eeprom_rw(dev_addr, offset, buffer, cnt, 1);
183}
184
Marek Vasutd4e69e62015-11-10 20:53:33 +0100185int eeprom_write(unsigned dev_addr, unsigned offset,
186 uchar *buffer, unsigned cnt)
Marek Vasut1a378892015-11-10 20:53:30 +0100187{
188 int ret;
wdenk38635852002-08-27 05:55:31 +0000189
Marek Vasut52cd47c2015-11-10 20:53:25 +0100190 eeprom_write_enable(dev_addr, 1);
191
Marek Vasut4f296d02015-11-10 20:53:18 +0100192 /*
193 * Write data until done or would cross a write page boundary.
wdenk38635852002-08-27 05:55:31 +0000194 * We must write the address again when changing pages
195 * because the address counter only increments within a page.
196 */
Alexey Brodkin52bc7c72015-12-14 18:45:34 +0300197 ret = eeprom_rw(dev_addr, offset, buffer, cnt, 0);
Marek Vasut52cd47c2015-11-10 20:53:25 +0100198
199 eeprom_write_enable(dev_addr, 0);
Marek Vasut1a378892015-11-10 20:53:30 +0100200 return ret;
wdenk38635852002-08-27 05:55:31 +0000201}
202
Nikita Kiryanovc40f0372016-04-16 17:55:11 +0300203static int parse_numeric_param(char *str)
204{
205 char *endptr;
206 int value = simple_strtol(str, &endptr, 16);
207
208 return (*endptr != '\0') ? -1 : value;
209}
210
211/**
212 * parse_i2c_bus_addr - parse the i2c bus and i2c devaddr parameters
213 *
214 * @i2c_bus: address to store the i2c bus
215 * @i2c_addr: address to store the device i2c address
216 * @argc: count of command line arguments left to parse
217 * @argv: command line arguments left to parse
218 * @argc_no_bus_addr: argc value we expect to see when bus & addr aren't given
219 *
220 * @returns: number of arguments parsed or CMD_RET_USAGE if error
221 */
222static int parse_i2c_bus_addr(int *i2c_bus, ulong *i2c_addr, int argc,
Simon Glass09140112020-05-10 11:40:03 -0600223 char *const argv[], int argc_no_bus_addr)
Nikita Kiryanovc40f0372016-04-16 17:55:11 +0300224{
225 int argc_no_bus = argc_no_bus_addr + 1;
226 int argc_bus_addr = argc_no_bus_addr + 2;
227
Tom Rini88cd7d02021-08-17 17:59:45 -0400228#ifdef CONFIG_SYS_I2C_EEPROM_ADDR
Nikita Kiryanovc40f0372016-04-16 17:55:11 +0300229 if (argc == argc_no_bus_addr) {
230 *i2c_bus = -1;
Tom Rini88cd7d02021-08-17 17:59:45 -0400231 *i2c_addr = CONFIG_SYS_I2C_EEPROM_ADDR;
Nikita Kiryanovc40f0372016-04-16 17:55:11 +0300232
233 return 0;
234 }
235#endif
236 if (argc == argc_no_bus) {
237 *i2c_bus = -1;
238 *i2c_addr = parse_numeric_param(argv[0]);
239
240 return 1;
241 }
242
243 if (argc == argc_bus_addr) {
244 *i2c_bus = parse_numeric_param(argv[0]);
245 *i2c_addr = parse_numeric_param(argv[1]);
246
247 return 2;
248 }
249
250 return CMD_RET_USAGE;
251}
252
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300253#ifdef CONFIG_CMD_EEPROM_LAYOUT
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300254
255__weak int eeprom_parse_layout_version(char *str)
256{
257 return LAYOUT_VERSION_UNRECOGNIZED;
258}
259
260static unsigned char eeprom_buf[CONFIG_SYS_EEPROM_SIZE];
261
Nikita Kiryanove7c27292016-04-16 17:55:12 +0300262#endif
263
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300264enum eeprom_action {
Nikita Kiryanove7c27292016-04-16 17:55:12 +0300265 EEPROM_READ,
266 EEPROM_WRITE,
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300267 EEPROM_PRINT,
268 EEPROM_UPDATE,
269 EEPROM_ACTION_INVALID,
270};
271
272static enum eeprom_action parse_action(char *cmd)
273{
Nikita Kiryanov3dc9be82016-04-16 17:55:13 +0300274 if (!strncmp(cmd, "read", 4))
275 return EEPROM_READ;
276 if (!strncmp(cmd, "write", 5))
277 return EEPROM_WRITE;
278#ifdef CONFIG_CMD_EEPROM_LAYOUT
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300279 if (!strncmp(cmd, "print", 5))
280 return EEPROM_PRINT;
281 if (!strncmp(cmd, "update", 6))
282 return EEPROM_UPDATE;
Nikita Kiryanov3dc9be82016-04-16 17:55:13 +0300283#endif
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300284
285 return EEPROM_ACTION_INVALID;
286}
287
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300288static int eeprom_execute_command(enum eeprom_action action, int i2c_bus,
Nikita Kiryanove7c27292016-04-16 17:55:12 +0300289 ulong i2c_addr, int layout_ver, char *key,
290 char *value, ulong addr, ulong off, ulong cnt)
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300291{
Nikita Kiryanove7c27292016-04-16 17:55:12 +0300292 int rcode = 0;
293 const char *const fmt =
Klaus H. Sorensen6478a7e2019-12-11 11:18:29 +0000294 "\nEEPROM @0x%lX %s: addr 0x%08lx off 0x%04lx count %ld ... ";
Nikita Kiryanove7c27292016-04-16 17:55:12 +0300295#ifdef CONFIG_CMD_EEPROM_LAYOUT
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300296 struct eeprom_layout layout;
Nikita Kiryanove7c27292016-04-16 17:55:12 +0300297#endif
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300298
299 if (action == EEPROM_ACTION_INVALID)
300 return CMD_RET_USAGE;
301
302 eeprom_init(i2c_bus);
Nikita Kiryanove7c27292016-04-16 17:55:12 +0300303 if (action == EEPROM_READ) {
304 printf(fmt, i2c_addr, "read", addr, off, cnt);
305
306 rcode = eeprom_read(i2c_addr, off, (uchar *)addr, cnt);
307
308 puts("done\n");
309 return rcode;
310 } else if (action == EEPROM_WRITE) {
311 printf(fmt, i2c_addr, "write", addr, off, cnt);
312
313 rcode = eeprom_write(i2c_addr, off, (uchar *)addr, cnt);
314
315 puts("done\n");
316 return rcode;
317 }
318
319#ifdef CONFIG_CMD_EEPROM_LAYOUT
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300320 rcode = eeprom_read(i2c_addr, 0, eeprom_buf, CONFIG_SYS_EEPROM_SIZE);
321 if (rcode < 0)
322 return rcode;
323
324 eeprom_layout_setup(&layout, eeprom_buf, CONFIG_SYS_EEPROM_SIZE,
325 layout_ver);
326
327 if (action == EEPROM_PRINT) {
328 layout.print(&layout);
329 return 0;
330 }
331
332 layout.update(&layout, key, value);
333
334 rcode = eeprom_write(i2c_addr, 0, layout.data, CONFIG_SYS_EEPROM_SIZE);
Nikita Kiryanove7c27292016-04-16 17:55:12 +0300335#endif
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300336
337 return rcode;
338}
339
340#define NEXT_PARAM(argc, index) { (argc)--; (index)++; }
Simon Glass09140112020-05-10 11:40:03 -0600341int do_eeprom(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300342{
343 int layout_ver = LAYOUT_VERSION_AUTODETECT;
344 enum eeprom_action action = EEPROM_ACTION_INVALID;
Nikita Kiryanov3dc9be82016-04-16 17:55:13 +0300345 int i2c_bus = -1, index = 0;
346 ulong i2c_addr = -1, addr = 0, cnt = 0, off = 0;
347 int ret;
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300348 char *field_name = "";
349 char *field_value = "";
350
351 if (argc <= 1)
352 return CMD_RET_USAGE;
353
354 NEXT_PARAM(argc, index); /* Skip program name */
355
356 action = parse_action(argv[index]);
357 NEXT_PARAM(argc, index);
358
Nikita Kiryanov3dc9be82016-04-16 17:55:13 +0300359 if (action == EEPROM_ACTION_INVALID)
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300360 return CMD_RET_USAGE;
361
Nikita Kiryanov3dc9be82016-04-16 17:55:13 +0300362#ifdef CONFIG_CMD_EEPROM_LAYOUT
363 if (action == EEPROM_PRINT || action == EEPROM_UPDATE) {
364 if (!strcmp(argv[index], "-l")) {
365 NEXT_PARAM(argc, index);
366 layout_ver = eeprom_parse_layout_version(argv[index]);
367 NEXT_PARAM(argc, index);
368 }
369 }
370#endif
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300371
Nikita Kiryanov3dc9be82016-04-16 17:55:13 +0300372 switch (action) {
373 case EEPROM_READ:
374 case EEPROM_WRITE:
375 ret = parse_i2c_bus_addr(&i2c_bus, &i2c_addr, argc,
376 argv + index, 3);
377 break;
378 case EEPROM_PRINT:
379 ret = parse_i2c_bus_addr(&i2c_bus, &i2c_addr, argc,
380 argv + index, 0);
381 break;
382 case EEPROM_UPDATE:
383 ret = parse_i2c_bus_addr(&i2c_bus, &i2c_addr, argc,
384 argv + index, 2);
385 break;
386 default:
387 /* Get compiler to stop whining */
388 return CMD_RET_USAGE;
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300389 }
390
Nikita Kiryanov3dc9be82016-04-16 17:55:13 +0300391 if (ret == CMD_RET_USAGE)
392 return ret;
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300393
Nikita Kiryanov3dc9be82016-04-16 17:55:13 +0300394 while (ret--)
395 NEXT_PARAM(argc, index);
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300396
Nikita Kiryanov3dc9be82016-04-16 17:55:13 +0300397 if (action == EEPROM_READ || action == EEPROM_WRITE) {
398 addr = parse_numeric_param(argv[index]);
399 NEXT_PARAM(argc, index);
400 off = parse_numeric_param(argv[index]);
401 NEXT_PARAM(argc, index);
402 cnt = parse_numeric_param(argv[index]);
403 }
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300404
Nikita Kiryanov3dc9be82016-04-16 17:55:13 +0300405#ifdef CONFIG_CMD_EEPROM_LAYOUT
406 if (action == EEPROM_UPDATE) {
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300407 field_name = argv[index];
408 NEXT_PARAM(argc, index);
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300409 field_value = argv[index];
410 NEXT_PARAM(argc, index);
411 }
Nikita Kiryanov3dc9be82016-04-16 17:55:13 +0300412#endif
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300413
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300414 return eeprom_execute_command(action, i2c_bus, i2c_addr, layout_ver,
Nikita Kiryanov3dc9be82016-04-16 17:55:13 +0300415 field_name, field_value, addr, off, cnt);
wdenk38635852002-08-27 05:55:31 +0000416}
Heiko Schocher548738b2010-01-07 08:55:40 +0100417
wdenk0d498392003-07-01 21:06:45 +0000418U_BOOT_CMD(
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300419 eeprom, 8, 1, do_eeprom,
Peter Tyser2fb26042009-01-27 18:03:12 -0600420 "EEPROM sub-system",
Marek Vasutd4fec4e2015-11-10 20:53:32 +0100421 "read <bus> <devaddr> addr off cnt\n"
422 "eeprom write <bus> <devaddr> addr off cnt\n"
Wolfgang Denka89c33d2009-05-24 17:06:54 +0200423 " - read/write `cnt' bytes from `devaddr` EEPROM at offset `off'"
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300424#ifdef CONFIG_CMD_EEPROM_LAYOUT
425 "\n"
Nikita Kiryanov3dc9be82016-04-16 17:55:13 +0300426 "eeprom print [-l <layout_version>] <bus> <devaddr>\n"
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300427 " - Print layout fields and their data in human readable format\n"
Nikita Kiryanov3dc9be82016-04-16 17:55:13 +0300428 "eeprom update [-l <layout_version>] <bus> <devaddr> field_name field_value\n"
Nikita Kiryanovaa9e6042016-04-16 17:55:03 +0300429 " - Update a specific eeprom field with new data.\n"
430 " The new data must be written in the same human readable format as shown by the print command.\n"
431 "\n"
432 "LAYOUT VERSIONS\n"
433 "The -l option can be used to force the command to interpret the EEPROM data using the chosen layout.\n"
434 "If the -l option is omitted, the command will auto detect the layout based on the data in the EEPROM.\n"
435 "The values which can be provided with the -l option are:\n"
436 CONFIG_EEPROM_LAYOUT_HELP_STRING"\n"
437#endif
Jeroen Hofstee0e350f82014-06-23 00:22:08 +0200438)