1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * PTP 1588 clock support - sysfs interface.
12 static ssize_t clock_name_show(struct device *dev,  in clock_name_show()
16 	return snprintf(page, PAGE_SIZE-1, "%s\n", ptp->info->name);  in clock_name_show()
18 static DEVICE_ATTR_RO(clock_name);
21 static ssize_t var##_show(struct device *dev,				\
25 	return snprintf(page, PAGE_SIZE-1, "%d\n", ptp->info->var);	\
27 static DEVICE_ATTR(name, 0444, var##_show, NULL);
36 static ssize_t extts_enable_store(struct device *dev,  in extts_enable_store()
41 	struct ptp_clock_info *ops = ptp->info;  in extts_enable_store()
43 	int cnt, enable;  in extts_enable_store()  local
44 	int err = -EINVAL;  in extts_enable_store()
46 	cnt = sscanf(buf, "%u %d", &req.extts.index, &enable);  in extts_enable_store()
49 	if (req.extts.index >= ops->n_ext_ts)  in extts_enable_store()
52 	err = ops->enable(ops, &req, enable ? 1 : 0);  in extts_enable_store()
60 static DEVICE_ATTR(extts_enable, 0220, NULL, extts_enable_store);
62 static ssize_t extts_fifo_show(struct device *dev,  in extts_fifo_show()
66 	struct timestamp_event_queue *queue = &ptp->tsevq;  in extts_fifo_show()
74 	if (mutex_lock_interruptible(&ptp->tsevq_mux))  in extts_fifo_show()
75 		return -ERESTARTSYS;  in extts_fifo_show()
77 	spin_lock_irqsave(&queue->lock, flags);  in extts_fifo_show()
80 		event = queue->buf[queue->head];  in extts_fifo_show()
81 		queue->head = (queue->head + 1) % PTP_MAX_TIMESTAMPS;  in extts_fifo_show()
83 	spin_unlock_irqrestore(&queue->lock, flags);  in extts_fifo_show()
91 	mutex_unlock(&ptp->tsevq_mux);  in extts_fifo_show()
94 static DEVICE_ATTR(fifo, 0444, extts_fifo_show, NULL);
96 static ssize_t period_store(struct device *dev,  in period_store()
101 	struct ptp_clock_info *ops = ptp->info;  in period_store()
103 	int cnt, enable, err = -EINVAL;  in period_store()  local
110 	if (req.perout.index >= ops->n_per_out)  in period_store()
113 	enable = req.perout.period.sec || req.perout.period.nsec;  in period_store()
114 	err = ops->enable(ops, &req, enable);  in period_store()
122 static DEVICE_ATTR(period, 0220, NULL, period_store);
124 static ssize_t pps_enable_store(struct device *dev,  in pps_enable_store()
129 	struct ptp_clock_info *ops = ptp->info;  in pps_enable_store()
131 	int cnt, enable;  in pps_enable_store()  local
132 	int err = -EINVAL;  in pps_enable_store()
135 		return -EPERM;  in pps_enable_store()
137 	cnt = sscanf(buf, "%d", &enable);  in pps_enable_store()
141 	err = ops->enable(ops, &req, enable ? 1 : 0);  in pps_enable_store()
149 static DEVICE_ATTR(pps_enable, 0220, NULL, pps_enable_store);
151 static struct attribute *ptp_attrs[] = {
168 static umode_t ptp_is_attribute_visible(struct kobject *kobj,  in ptp_is_attribute_visible()
173 	struct ptp_clock_info *info = ptp->info;  in ptp_is_attribute_visible()
174 	umode_t mode = attr->mode;  in ptp_is_attribute_visible()
178 		if (!info->n_ext_ts)  in ptp_is_attribute_visible()
181 		if (!info->n_per_out)  in ptp_is_attribute_visible()
184 		if (!info->pps)  in ptp_is_attribute_visible()
191 static const struct attribute_group ptp_group = {
201 static int ptp_pin_name2index(struct ptp_clock *ptp, const char *name)  in ptp_pin_name2index()
204 	for (i = 0; i < ptp->info->n_pins; i++) {  in ptp_pin_name2index()
205 		if (!strcmp(ptp->info->pin_config[i].name, name))  in ptp_pin_name2index()
208 	return -1;  in ptp_pin_name2index()
211 static ssize_t ptp_pin_show(struct device *dev, struct device_attribute *attr,  in ptp_pin_show()
218 	index = ptp_pin_name2index(ptp, attr->attr.name);  in ptp_pin_show()
220 		return -EINVAL;  in ptp_pin_show()
222 	if (mutex_lock_interruptible(&ptp->pincfg_mux))  in ptp_pin_show()
223 		return -ERESTARTSYS;  in ptp_pin_show()
225 	func = ptp->info->pin_config[index].func;  in ptp_pin_show()
226 	chan = ptp->info->pin_config[index].chan;  in ptp_pin_show()
228 	mutex_unlock(&ptp->pincfg_mux);  in ptp_pin_show()
233 static ssize_t ptp_pin_store(struct device *dev, struct device_attribute *attr,  in ptp_pin_store()
242 		return -EINVAL;  in ptp_pin_store()
244 	index = ptp_pin_name2index(ptp, attr->attr.name);  in ptp_pin_store()
246 		return -EINVAL;  in ptp_pin_store()
248 	if (mutex_lock_interruptible(&ptp->pincfg_mux))  in ptp_pin_store()
249 		return -ERESTARTSYS;  in ptp_pin_store()
251 	mutex_unlock(&ptp->pincfg_mux);  in ptp_pin_store()
260 	struct ptp_clock_info *info = ptp->info;  in ptp_populate_pin_groups()
261 	int err = -ENOMEM, i, n_pins = info->n_pins;  in ptp_populate_pin_groups()
266 	ptp->pin_dev_attr = kcalloc(n_pins, sizeof(*ptp->pin_dev_attr),  in ptp_populate_pin_groups()
268 	if (!ptp->pin_dev_attr)  in ptp_populate_pin_groups()
271 	ptp->pin_attr = kcalloc(1 + n_pins, sizeof(*ptp->pin_attr), GFP_KERNEL);  in ptp_populate_pin_groups()
272 	if (!ptp->pin_attr)  in ptp_populate_pin_groups()
276 		struct device_attribute *da = &ptp->pin_dev_attr[i];  in ptp_populate_pin_groups()
277 		sysfs_attr_init(&da->attr);  in ptp_populate_pin_groups()
278 		da->attr.name = info->pin_config[i].name;  in ptp_populate_pin_groups()
279 		da->attr.mode = 0644;  in ptp_populate_pin_groups()
280 		da->show = ptp_pin_show;  in ptp_populate_pin_groups()
281 		da->store = ptp_pin_store;  in ptp_populate_pin_groups()
282 		ptp->pin_attr[i] = &da->attr;  in ptp_populate_pin_groups()
285 	ptp->pin_attr_group.name = "pins";  in ptp_populate_pin_groups()
286 	ptp->pin_attr_group.attrs = ptp->pin_attr;  in ptp_populate_pin_groups()
288 	ptp->pin_attr_groups[0] = &ptp->pin_attr_group;  in ptp_populate_pin_groups()
293 	kfree(ptp->pin_dev_attr);  in ptp_populate_pin_groups()
300 	kfree(ptp->pin_attr);  in ptp_cleanup_pin_groups()
301 	kfree(ptp->pin_dev_attr);  in ptp_cleanup_pin_groups()