sysfs_slave.c (4b4193256c8d3bc3a5397b5cd9494c2ad386317d) sysfs_slave.c (565e3afaefee3cfe13783c2b1e8d5ceb09023beb)
1// SPDX-License-Identifier: GPL-2.0-only
2// Copyright(c) 2015-2020 Intel Corporation.
3
4#include <linux/device.h>
5#include <linux/mod_devicetable.h>
6#include <linux/slab.h>
7#include <linux/sysfs.h>
8#include <linux/soundwire/sdw.h>
9#include <linux/soundwire/sdw_type.h>
10#include "bus.h"
11#include "sysfs_local.h"
12
13/*
14 * Slave sysfs
15 */
16
17/*
18 * The sysfs for Slave reflects the MIPI description as given
1// SPDX-License-Identifier: GPL-2.0-only
2// Copyright(c) 2015-2020 Intel Corporation.
3
4#include <linux/device.h>
5#include <linux/mod_devicetable.h>
6#include <linux/slab.h>
7#include <linux/sysfs.h>
8#include <linux/soundwire/sdw.h>
9#include <linux/soundwire/sdw_type.h>
10#include "bus.h"
11#include "sysfs_local.h"
12
13/*
14 * Slave sysfs
15 */
16
17/*
18 * The sysfs for Slave reflects the MIPI description as given
19 * in the MIPI DisCo spec
19 * in the MIPI DisCo spec.
20 * status and device_number come directly from the MIPI SoundWire
21 * 1.x specification.
20 *
21 * Base file is device
22 *
23 * Base file is device
24 * |---- status
25 * |---- device_number
22 * |---- modalias
23 * |---- dev-properties
24 * |---- mipi_revision
25 * |---- wake_capable
26 * |---- test_mode_capable
27 * |---- clk_stop_mode1
28 * |---- simple_clk_stop_capable
29 * |---- clk_stop_timeout

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121 &dev_attr_sink_ports.attr,
122 NULL,
123};
124
125/*
126 * we don't use ATTRIBUTES_GROUP here since we want to add a subdirectory
127 * for device-level properties
128 */
26 * |---- modalias
27 * |---- dev-properties
28 * |---- mipi_revision
29 * |---- wake_capable
30 * |---- test_mode_capable
31 * |---- clk_stop_mode1
32 * |---- simple_clk_stop_capable
33 * |---- clk_stop_timeout

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125 &dev_attr_sink_ports.attr,
126 NULL,
127};
128
129/*
130 * we don't use ATTRIBUTES_GROUP here since we want to add a subdirectory
131 * for device-level properties
132 */
129static struct attribute_group sdw_slave_dev_attr_group = {
133static const struct attribute_group sdw_slave_dev_attr_group = {
130 .attrs = slave_dev_attrs,
131 .name = "dev-properties",
132};
133
134/*
135 * DP0 sysfs
136 */
137

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207 if (slave->prop.source_ports || slave->prop.sink_ports) {
208 ret = sdw_slave_sysfs_dpn_init(slave);
209 if (ret < 0)
210 return ret;
211 }
212
213 return 0;
214}
134 .attrs = slave_dev_attrs,
135 .name = "dev-properties",
136};
137
138/*
139 * DP0 sysfs
140 */
141

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211 if (slave->prop.source_ports || slave->prop.sink_ports) {
212 ret = sdw_slave_sysfs_dpn_init(slave);
213 if (ret < 0)
214 return ret;
215 }
216
217 return 0;
218}
219
220/*
221 * the status is shown in capital letters for UNATTACHED and RESERVED
222 * on purpose, to highligh users to the fact that these status values
223 * are not expected.
224 */
225static const char *const slave_status[] = {
226 [SDW_SLAVE_UNATTACHED] = "UNATTACHED",
227 [SDW_SLAVE_ATTACHED] = "Attached",
228 [SDW_SLAVE_ALERT] = "Alert",
229 [SDW_SLAVE_RESERVED] = "RESERVED",
230};
231
232static ssize_t status_show(struct device *dev,
233 struct device_attribute *attr, char *buf)
234{
235 struct sdw_slave *slave = dev_to_sdw_dev(dev);
236
237 return sprintf(buf, "%s\n", slave_status[slave->status]);
238}
239static DEVICE_ATTR_RO(status);
240
241static ssize_t device_number_show(struct device *dev,
242 struct device_attribute *attr, char *buf)
243{
244 struct sdw_slave *slave = dev_to_sdw_dev(dev);
245
246 if (slave->status == SDW_SLAVE_UNATTACHED)
247 return sprintf(buf, "%s", "N/A");
248 else
249 return sprintf(buf, "%d", slave->dev_num);
250}
251static DEVICE_ATTR_RO(device_number);
252
253static struct attribute *slave_status_attrs[] = {
254 &dev_attr_status.attr,
255 &dev_attr_device_number.attr,
256 NULL,
257};
258
259/*
260 * we don't use ATTRIBUTES_GROUP here since the group is used in a
261 * separate file and can't be handled as a static.
262 */
263static const struct attribute_group sdw_slave_status_attr_group = {
264 .attrs = slave_status_attrs,
265};
266
267const struct attribute_group *sdw_slave_status_attr_groups[] = {
268 &sdw_slave_status_attr_group,
269 NULL
270};