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1// SPDX-License-Identifier: GPL-2.0+
2// Expose the ChromeOS EC through sysfs
3//
4// Copyright (C) 2014 Google, Inc.
5
6#include <linux/ctype.h>
7#include <linux/delay.h>
8#include <linux/device.h>
9#include <linux/fs.h>
10#include <linux/kobject.h>
11#include <linux/module.h>
12#include <linux/platform_data/cros_ec_commands.h>
13#include <linux/platform_data/cros_ec_proto.h>
14#include <linux/platform_device.h>
15#include <linux/printk.h>
16#include <linux/slab.h>
17#include <linux/stat.h>
18#include <linux/types.h>
19#include <linux/uaccess.h>
20
21#define DRV_NAME "cros-ec-sysfs"
22
23/* Accessor functions */
24
25static ssize_t reboot_show(struct device *dev,
26 struct device_attribute *attr, char *buf)
27{
28 int count = 0;
29
30 count += scnprintf(buf + count, PAGE_SIZE - count,
31 "ro|rw|cancel|cold|disable-jump|hibernate|cold-ap-off");
32 count += scnprintf(buf + count, PAGE_SIZE - count,
33 " [at-shutdown]\n");
34 return count;
35}
36
37static ssize_t reboot_store(struct device *dev,
38 struct device_attribute *attr,
39 const char *buf, size_t count)
40{
41 static const struct {
42 const char * const str;
43 uint8_t cmd;
44 uint8_t flags;
45 } words[] = {
46 {"cancel", EC_REBOOT_CANCEL, 0},
47 {"ro", EC_REBOOT_JUMP_RO, 0},
48 {"rw", EC_REBOOT_JUMP_RW, 0},
49 {"cold-ap-off", EC_REBOOT_COLD_AP_OFF, 0},
50 {"cold", EC_REBOOT_COLD, 0},
51 {"disable-jump", EC_REBOOT_DISABLE_JUMP, 0},
52 {"hibernate", EC_REBOOT_HIBERNATE, 0},
53 {"at-shutdown", -1, EC_REBOOT_FLAG_ON_AP_SHUTDOWN},
54 };
55 struct cros_ec_command *msg;
56 struct ec_params_reboot_ec *param;
57 int got_cmd = 0, offset = 0;
58 int i;
59 int ret;
60 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
61
62 msg = kmalloc(sizeof(*msg) + sizeof(*param), GFP_KERNEL);
63 if (!msg)
64 return -ENOMEM;
65
66 param = (struct ec_params_reboot_ec *)msg->data;
67
68 param->flags = 0;
69 while (1) {
70 /* Find word to start scanning */
71 while (buf[offset] && isspace(buf[offset]))
72 offset++;
73 if (!buf[offset])
74 break;
75
76 for (i = 0; i < ARRAY_SIZE(words); i++) {
77 if (!strncasecmp(words[i].str, buf+offset,
78 strlen(words[i].str))) {
79 if (words[i].flags) {
80 param->flags |= words[i].flags;
81 } else {
82 param->cmd = words[i].cmd;
83 got_cmd = 1;
84 }
85 break;
86 }
87 }
88
89 /* On to the next word, if any */
90 while (buf[offset] && !isspace(buf[offset]))
91 offset++;
92 }
93
94 if (!got_cmd) {
95 count = -EINVAL;
96 goto exit;
97 }
98
99 msg->version = 0;
100 msg->command = EC_CMD_REBOOT_EC + ec->cmd_offset;
101 msg->outsize = sizeof(*param);
102 msg->insize = 0;
103 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
104 if (ret < 0)
105 count = ret;
106exit:
107 kfree(msg);
108 return count;
109}
110
111static ssize_t version_show(struct device *dev,
112 struct device_attribute *attr, char *buf)
113{
114 static const char * const image_names[] = {"unknown", "RO", "RW"};
115 struct ec_response_get_version *r_ver;
116 struct ec_response_get_chip_info *r_chip;
117 struct ec_response_board_version *r_board;
118 struct cros_ec_command *msg;
119 int ret;
120 int count = 0;
121 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
122
123 msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
124 if (!msg)
125 return -ENOMEM;
126
127 /* Get versions. RW may change. */
128 msg->version = 0;
129 msg->command = EC_CMD_GET_VERSION + ec->cmd_offset;
130 msg->insize = sizeof(*r_ver);
131 msg->outsize = 0;
132 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
133 if (ret < 0) {
134 count = ret;
135 goto exit;
136 }
137 r_ver = (struct ec_response_get_version *)msg->data;
138 /* Strings should be null-terminated, but let's be sure. */
139 r_ver->version_string_ro[sizeof(r_ver->version_string_ro) - 1] = '\0';
140 r_ver->version_string_rw[sizeof(r_ver->version_string_rw) - 1] = '\0';
141 count += scnprintf(buf + count, PAGE_SIZE - count,
142 "RO version: %s\n", r_ver->version_string_ro);
143 count += scnprintf(buf + count, PAGE_SIZE - count,
144 "RW version: %s\n", r_ver->version_string_rw);
145 count += scnprintf(buf + count, PAGE_SIZE - count,
146 "Firmware copy: %s\n",
147 (r_ver->current_image < ARRAY_SIZE(image_names) ?
148 image_names[r_ver->current_image] : "?"));
149
150 /* Get build info. */
151 msg->command = EC_CMD_GET_BUILD_INFO + ec->cmd_offset;
152 msg->insize = EC_HOST_PARAM_SIZE;
153 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
154 if (ret < 0) {
155 count += scnprintf(buf + count, PAGE_SIZE - count,
156 "Build info: XFER / EC ERROR %d / %d\n",
157 ret, msg->result);
158 } else {
159 msg->data[EC_HOST_PARAM_SIZE - 1] = '\0';
160 count += scnprintf(buf + count, PAGE_SIZE - count,
161 "Build info: %s\n", msg->data);
162 }
163
164 /* Get chip info. */
165 msg->command = EC_CMD_GET_CHIP_INFO + ec->cmd_offset;
166 msg->insize = sizeof(*r_chip);
167 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
168 if (ret < 0) {
169 count += scnprintf(buf + count, PAGE_SIZE - count,
170 "Chip info: XFER / EC ERROR %d / %d\n",
171 ret, msg->result);
172 } else {
173 r_chip = (struct ec_response_get_chip_info *)msg->data;
174
175 r_chip->vendor[sizeof(r_chip->vendor) - 1] = '\0';
176 r_chip->name[sizeof(r_chip->name) - 1] = '\0';
177 r_chip->revision[sizeof(r_chip->revision) - 1] = '\0';
178 count += scnprintf(buf + count, PAGE_SIZE - count,
179 "Chip vendor: %s\n", r_chip->vendor);
180 count += scnprintf(buf + count, PAGE_SIZE - count,
181 "Chip name: %s\n", r_chip->name);
182 count += scnprintf(buf + count, PAGE_SIZE - count,
183 "Chip revision: %s\n", r_chip->revision);
184 }
185
186 /* Get board version */
187 msg->command = EC_CMD_GET_BOARD_VERSION + ec->cmd_offset;
188 msg->insize = sizeof(*r_board);
189 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
190 if (ret < 0) {
191 count += scnprintf(buf + count, PAGE_SIZE - count,
192 "Board version: XFER / EC ERROR %d / %d\n",
193 ret, msg->result);
194 } else {
195 r_board = (struct ec_response_board_version *)msg->data;
196
197 count += scnprintf(buf + count, PAGE_SIZE - count,
198 "Board version: %d\n",
199 r_board->board_version);
200 }
201
202exit:
203 kfree(msg);
204 return count;
205}
206
207static ssize_t flashinfo_show(struct device *dev,
208 struct device_attribute *attr, char *buf)
209{
210 struct ec_response_flash_info *resp;
211 struct cros_ec_command *msg;
212 int ret;
213 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
214
215 msg = kmalloc(sizeof(*msg) + sizeof(*resp), GFP_KERNEL);
216 if (!msg)
217 return -ENOMEM;
218
219 /* The flash info shouldn't ever change, but ask each time anyway. */
220 msg->version = 0;
221 msg->command = EC_CMD_FLASH_INFO + ec->cmd_offset;
222 msg->insize = sizeof(*resp);
223 msg->outsize = 0;
224 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
225 if (ret < 0)
226 goto exit;
227
228 resp = (struct ec_response_flash_info *)msg->data;
229
230 ret = scnprintf(buf, PAGE_SIZE,
231 "FlashSize %d\nWriteSize %d\n"
232 "EraseSize %d\nProtectSize %d\n",
233 resp->flash_size, resp->write_block_size,
234 resp->erase_block_size, resp->protect_block_size);
235exit:
236 kfree(msg);
237 return ret;
238}
239
240/* Keyboard wake angle control */
241static ssize_t kb_wake_angle_show(struct device *dev,
242 struct device_attribute *attr, char *buf)
243{
244 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
245 struct ec_response_motion_sense *resp;
246 struct ec_params_motion_sense *param;
247 struct cros_ec_command *msg;
248 int ret;
249
250 msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
251 if (!msg)
252 return -ENOMEM;
253
254 param = (struct ec_params_motion_sense *)msg->data;
255 msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
256 msg->version = 2;
257 param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
258 param->kb_wake_angle.data = EC_MOTION_SENSE_NO_VALUE;
259 msg->outsize = sizeof(*param);
260 msg->insize = sizeof(*resp);
261
262 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
263 if (ret < 0)
264 goto exit;
265
266 resp = (struct ec_response_motion_sense *)msg->data;
267 ret = scnprintf(buf, PAGE_SIZE, "%d\n", resp->kb_wake_angle.ret);
268exit:
269 kfree(msg);
270 return ret;
271}
272
273static ssize_t kb_wake_angle_store(struct device *dev,
274 struct device_attribute *attr,
275 const char *buf, size_t count)
276{
277 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
278 struct ec_params_motion_sense *param;
279 struct cros_ec_command *msg;
280 u16 angle;
281 int ret;
282
283 ret = kstrtou16(buf, 0, &angle);
284 if (ret)
285 return ret;
286
287 msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
288 if (!msg)
289 return -ENOMEM;
290
291 param = (struct ec_params_motion_sense *)msg->data;
292 msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
293 msg->version = 2;
294 param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
295 param->kb_wake_angle.data = angle;
296 msg->outsize = sizeof(*param);
297 msg->insize = sizeof(struct ec_response_motion_sense);
298
299 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
300 kfree(msg);
301 if (ret < 0)
302 return ret;
303 return count;
304}
305
306/* Module initialization */
307
308static DEVICE_ATTR_RW(reboot);
309static DEVICE_ATTR_RO(version);
310static DEVICE_ATTR_RO(flashinfo);
311static DEVICE_ATTR_RW(kb_wake_angle);
312
313static struct attribute *__ec_attrs[] = {
314 &dev_attr_kb_wake_angle.attr,
315 &dev_attr_reboot.attr,
316 &dev_attr_version.attr,
317 &dev_attr_flashinfo.attr,
318 NULL,
319};
320
321static umode_t cros_ec_ctrl_visible(struct kobject *kobj,
322 struct attribute *a, int n)
323{
324 struct device *dev = kobj_to_dev(kobj);
325 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
326
327 if (a == &dev_attr_kb_wake_angle.attr && !ec->has_kb_wake_angle)
328 return 0;
329
330 return a->mode;
331}
332
333static const struct attribute_group cros_ec_attr_group = {
334 .attrs = __ec_attrs,
335 .is_visible = cros_ec_ctrl_visible,
336};
337
338static int cros_ec_sysfs_probe(struct platform_device *pd)
339{
340 struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
341 struct device *dev = &pd->dev;
342 int ret;
343
344 ret = sysfs_create_group(&ec_dev->class_dev.kobj, &cros_ec_attr_group);
345 if (ret < 0)
346 dev_err(dev, "failed to create attributes. err=%d\n", ret);
347
348 return ret;
349}
350
351static int cros_ec_sysfs_remove(struct platform_device *pd)
352{
353 struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
354
355 sysfs_remove_group(&ec_dev->class_dev.kobj, &cros_ec_attr_group);
356
357 return 0;
358}
359
360static struct platform_driver cros_ec_sysfs_driver = {
361 .driver = {
362 .name = DRV_NAME,
363 },
364 .probe = cros_ec_sysfs_probe,
365 .remove = cros_ec_sysfs_remove,
366};
367
368module_platform_driver(cros_ec_sysfs_driver);
369
370MODULE_LICENSE("GPL");
371MODULE_DESCRIPTION("Expose the ChromeOS EC through sysfs");
372MODULE_ALIAS("platform:" DRV_NAME);
1// SPDX-License-Identifier: GPL-2.0+
2// Expose the ChromeOS EC through sysfs
3//
4// Copyright (C) 2014 Google, Inc.
5
6#include <linux/ctype.h>
7#include <linux/delay.h>
8#include <linux/device.h>
9#include <linux/fs.h>
10#include <linux/kobject.h>
11#include <linux/module.h>
12#include <linux/platform_data/cros_ec_commands.h>
13#include <linux/platform_data/cros_ec_proto.h>
14#include <linux/platform_device.h>
15#include <linux/printk.h>
16#include <linux/slab.h>
17#include <linux/stat.h>
18#include <linux/types.h>
19#include <linux/uaccess.h>
20
21#define DRV_NAME "cros-ec-sysfs"
22
23/* Accessor functions */
24
25static ssize_t reboot_show(struct device *dev,
26 struct device_attribute *attr, char *buf)
27{
28 int count = 0;
29
30 count += scnprintf(buf + count, PAGE_SIZE - count,
31 "ro|rw|cancel|cold|disable-jump|hibernate|cold-ap-off");
32 count += scnprintf(buf + count, PAGE_SIZE - count,
33 " [at-shutdown]\n");
34 return count;
35}
36
37static ssize_t reboot_store(struct device *dev,
38 struct device_attribute *attr,
39 const char *buf, size_t count)
40{
41 static const struct {
42 const char * const str;
43 uint8_t cmd;
44 uint8_t flags;
45 } words[] = {
46 {"cancel", EC_REBOOT_CANCEL, 0},
47 {"ro", EC_REBOOT_JUMP_RO, 0},
48 {"rw", EC_REBOOT_JUMP_RW, 0},
49 {"cold-ap-off", EC_REBOOT_COLD_AP_OFF, 0},
50 {"cold", EC_REBOOT_COLD, 0},
51 {"disable-jump", EC_REBOOT_DISABLE_JUMP, 0},
52 {"hibernate", EC_REBOOT_HIBERNATE, 0},
53 {"at-shutdown", -1, EC_REBOOT_FLAG_ON_AP_SHUTDOWN},
54 };
55 struct cros_ec_command *msg;
56 struct ec_params_reboot_ec *param;
57 int got_cmd = 0, offset = 0;
58 int i;
59 int ret;
60 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
61
62 msg = kmalloc(sizeof(*msg) + sizeof(*param), GFP_KERNEL);
63 if (!msg)
64 return -ENOMEM;
65
66 param = (struct ec_params_reboot_ec *)msg->data;
67
68 param->flags = 0;
69 while (1) {
70 /* Find word to start scanning */
71 while (buf[offset] && isspace(buf[offset]))
72 offset++;
73 if (!buf[offset])
74 break;
75
76 for (i = 0; i < ARRAY_SIZE(words); i++) {
77 if (!strncasecmp(words[i].str, buf+offset,
78 strlen(words[i].str))) {
79 if (words[i].flags) {
80 param->flags |= words[i].flags;
81 } else {
82 param->cmd = words[i].cmd;
83 got_cmd = 1;
84 }
85 break;
86 }
87 }
88
89 /* On to the next word, if any */
90 while (buf[offset] && !isspace(buf[offset]))
91 offset++;
92 }
93
94 if (!got_cmd) {
95 count = -EINVAL;
96 goto exit;
97 }
98
99 msg->version = 0;
100 msg->command = EC_CMD_REBOOT_EC + ec->cmd_offset;
101 msg->outsize = sizeof(*param);
102 msg->insize = 0;
103 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
104 if (ret < 0)
105 count = ret;
106exit:
107 kfree(msg);
108 return count;
109}
110
111static ssize_t version_show(struct device *dev,
112 struct device_attribute *attr, char *buf)
113{
114 static const char * const image_names[] = {"unknown", "RO", "RW"};
115 struct ec_response_get_version *r_ver;
116 struct ec_response_get_chip_info *r_chip;
117 struct ec_response_board_version *r_board;
118 struct cros_ec_command *msg;
119 int ret;
120 int count = 0;
121 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
122
123 msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
124 if (!msg)
125 return -ENOMEM;
126
127 /* Get versions. RW may change. */
128 msg->version = 0;
129 msg->command = EC_CMD_GET_VERSION + ec->cmd_offset;
130 msg->insize = sizeof(*r_ver);
131 msg->outsize = 0;
132 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
133 if (ret < 0) {
134 count = ret;
135 goto exit;
136 }
137 r_ver = (struct ec_response_get_version *)msg->data;
138 /* Strings should be null-terminated, but let's be sure. */
139 r_ver->version_string_ro[sizeof(r_ver->version_string_ro) - 1] = '\0';
140 r_ver->version_string_rw[sizeof(r_ver->version_string_rw) - 1] = '\0';
141 count += scnprintf(buf + count, PAGE_SIZE - count,
142 "RO version: %s\n", r_ver->version_string_ro);
143 count += scnprintf(buf + count, PAGE_SIZE - count,
144 "RW version: %s\n", r_ver->version_string_rw);
145 count += scnprintf(buf + count, PAGE_SIZE - count,
146 "Firmware copy: %s\n",
147 (r_ver->current_image < ARRAY_SIZE(image_names) ?
148 image_names[r_ver->current_image] : "?"));
149
150 /* Get build info. */
151 msg->command = EC_CMD_GET_BUILD_INFO + ec->cmd_offset;
152 msg->insize = EC_HOST_PARAM_SIZE;
153 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
154 if (ret < 0) {
155 count += scnprintf(buf + count, PAGE_SIZE - count,
156 "Build info: XFER / EC ERROR %d / %d\n",
157 ret, msg->result);
158 } else {
159 msg->data[EC_HOST_PARAM_SIZE - 1] = '\0';
160 count += scnprintf(buf + count, PAGE_SIZE - count,
161 "Build info: %s\n", msg->data);
162 }
163
164 /* Get chip info. */
165 msg->command = EC_CMD_GET_CHIP_INFO + ec->cmd_offset;
166 msg->insize = sizeof(*r_chip);
167 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
168 if (ret < 0) {
169 count += scnprintf(buf + count, PAGE_SIZE - count,
170 "Chip info: XFER / EC ERROR %d / %d\n",
171 ret, msg->result);
172 } else {
173 r_chip = (struct ec_response_get_chip_info *)msg->data;
174
175 r_chip->vendor[sizeof(r_chip->vendor) - 1] = '\0';
176 r_chip->name[sizeof(r_chip->name) - 1] = '\0';
177 r_chip->revision[sizeof(r_chip->revision) - 1] = '\0';
178 count += scnprintf(buf + count, PAGE_SIZE - count,
179 "Chip vendor: %s\n", r_chip->vendor);
180 count += scnprintf(buf + count, PAGE_SIZE - count,
181 "Chip name: %s\n", r_chip->name);
182 count += scnprintf(buf + count, PAGE_SIZE - count,
183 "Chip revision: %s\n", r_chip->revision);
184 }
185
186 /* Get board version */
187 msg->command = EC_CMD_GET_BOARD_VERSION + ec->cmd_offset;
188 msg->insize = sizeof(*r_board);
189 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
190 if (ret < 0) {
191 count += scnprintf(buf + count, PAGE_SIZE - count,
192 "Board version: XFER / EC ERROR %d / %d\n",
193 ret, msg->result);
194 } else {
195 r_board = (struct ec_response_board_version *)msg->data;
196
197 count += scnprintf(buf + count, PAGE_SIZE - count,
198 "Board version: %d\n",
199 r_board->board_version);
200 }
201
202exit:
203 kfree(msg);
204 return count;
205}
206
207static ssize_t flashinfo_show(struct device *dev,
208 struct device_attribute *attr, char *buf)
209{
210 struct ec_response_flash_info *resp;
211 struct cros_ec_command *msg;
212 int ret;
213 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
214
215 msg = kmalloc(sizeof(*msg) + sizeof(*resp), GFP_KERNEL);
216 if (!msg)
217 return -ENOMEM;
218
219 /* The flash info shouldn't ever change, but ask each time anyway. */
220 msg->version = 0;
221 msg->command = EC_CMD_FLASH_INFO + ec->cmd_offset;
222 msg->insize = sizeof(*resp);
223 msg->outsize = 0;
224 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
225 if (ret < 0)
226 goto exit;
227
228 resp = (struct ec_response_flash_info *)msg->data;
229
230 ret = scnprintf(buf, PAGE_SIZE,
231 "FlashSize %d\nWriteSize %d\n"
232 "EraseSize %d\nProtectSize %d\n",
233 resp->flash_size, resp->write_block_size,
234 resp->erase_block_size, resp->protect_block_size);
235exit:
236 kfree(msg);
237 return ret;
238}
239
240/* Keyboard wake angle control */
241static ssize_t kb_wake_angle_show(struct device *dev,
242 struct device_attribute *attr, char *buf)
243{
244 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
245 struct ec_response_motion_sense *resp;
246 struct ec_params_motion_sense *param;
247 struct cros_ec_command *msg;
248 int ret;
249
250 msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
251 if (!msg)
252 return -ENOMEM;
253
254 param = (struct ec_params_motion_sense *)msg->data;
255 msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
256 msg->version = 2;
257 param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
258 param->kb_wake_angle.data = EC_MOTION_SENSE_NO_VALUE;
259 msg->outsize = sizeof(*param);
260 msg->insize = sizeof(*resp);
261
262 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
263 if (ret < 0)
264 goto exit;
265
266 resp = (struct ec_response_motion_sense *)msg->data;
267 ret = scnprintf(buf, PAGE_SIZE, "%d\n", resp->kb_wake_angle.ret);
268exit:
269 kfree(msg);
270 return ret;
271}
272
273static ssize_t kb_wake_angle_store(struct device *dev,
274 struct device_attribute *attr,
275 const char *buf, size_t count)
276{
277 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
278 struct ec_params_motion_sense *param;
279 struct cros_ec_command *msg;
280 u16 angle;
281 int ret;
282
283 ret = kstrtou16(buf, 0, &angle);
284 if (ret)
285 return ret;
286
287 msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
288 if (!msg)
289 return -ENOMEM;
290
291 param = (struct ec_params_motion_sense *)msg->data;
292 msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
293 msg->version = 2;
294 param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
295 param->kb_wake_angle.data = angle;
296 msg->outsize = sizeof(*param);
297 msg->insize = sizeof(struct ec_response_motion_sense);
298
299 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
300 kfree(msg);
301 if (ret < 0)
302 return ret;
303 return count;
304}
305
306/* Module initialization */
307
308static DEVICE_ATTR_RW(reboot);
309static DEVICE_ATTR_RO(version);
310static DEVICE_ATTR_RO(flashinfo);
311static DEVICE_ATTR_RW(kb_wake_angle);
312
313static struct attribute *__ec_attrs[] = {
314 &dev_attr_kb_wake_angle.attr,
315 &dev_attr_reboot.attr,
316 &dev_attr_version.attr,
317 &dev_attr_flashinfo.attr,
318 NULL,
319};
320
321static umode_t cros_ec_ctrl_visible(struct kobject *kobj,
322 struct attribute *a, int n)
323{
324 struct device *dev = kobj_to_dev(kobj);
325 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
326
327 if (a == &dev_attr_kb_wake_angle.attr && !ec->has_kb_wake_angle)
328 return 0;
329
330 return a->mode;
331}
332
333static const struct attribute_group cros_ec_attr_group = {
334 .attrs = __ec_attrs,
335 .is_visible = cros_ec_ctrl_visible,
336};
337
338static int cros_ec_sysfs_probe(struct platform_device *pd)
339{
340 struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
341 struct device *dev = &pd->dev;
342 int ret;
343
344 ret = sysfs_create_group(&ec_dev->class_dev.kobj, &cros_ec_attr_group);
345 if (ret < 0)
346 dev_err(dev, "failed to create attributes. err=%d\n", ret);
347
348 return ret;
349}
350
351static int cros_ec_sysfs_remove(struct platform_device *pd)
352{
353 struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
354
355 sysfs_remove_group(&ec_dev->class_dev.kobj, &cros_ec_attr_group);
356
357 return 0;
358}
359
360static struct platform_driver cros_ec_sysfs_driver = {
361 .driver = {
362 .name = DRV_NAME,
363 },
364 .probe = cros_ec_sysfs_probe,
365 .remove = cros_ec_sysfs_remove,
366};
367
368module_platform_driver(cros_ec_sysfs_driver);
369
370MODULE_LICENSE("GPL");
371MODULE_DESCRIPTION("Expose the ChromeOS EC through sysfs");
372MODULE_ALIAS("platform:" DRV_NAME);