1 // SPDX-License-Identifier: GPL-2.0
14  * +-----+---------+
15  * | LED | COMMAND |
16  * +-----+---------+
18  * +-----+---------+
22  * +----------+--------------+-------------------------------------------+
24  * +----------+--------------+-------------------------------------------+
26  * +----------+--------------+-------------------------------------------+
28  * +----------+--------------+-------------------------------------------+
30  * +----------+--------------+-------------------------------------------+
33  * +----------+-----------------+--------------+--------------+
35  * +----------+-----------------+--------------+--------------+
37  * +----------+-----------------------------------------------+
39  * +----------+-----------------+--------------+--------------+
41  * +----------+-----------------+--------------+
43  * +----------+-----------------+
45  * +----------+-----------------+
47  * +----------+-----------------+
61 	/* for Screen LED */
64 	/* for Pipe LED */
88 static int el15203000_cmd(struct el15203000_led *led, u8 brightness)  in el15203000_cmd()  argument
94 	mutex_lock(&led->priv->lock);  in el15203000_cmd()
96 	dev_dbg(led->priv->dev, "Set brightness of 0x%02x(%c) to 0x%02x(%c)",  in el15203000_cmd()
97 		led->reg, led->reg, brightness, brightness);  in el15203000_cmd()
100 	if (time_after(led->priv->delay, jiffies)) {  in el15203000_cmd()
101 		dev_dbg(led->priv->dev, "Wait %luus to sync",  in el15203000_cmd()
108 	cmd[0] = led->reg;  in el15203000_cmd()
116 		ret = spi_write(led->priv->spi, &cmd[i], sizeof(cmd[i]));  in el15203000_cmd()
118 			dev_err(led->priv->dev,  in el15203000_cmd()
124 	led->priv->delay = jiffies + usecs_to_jiffies(EL_FW_DELAY_USEC);  in el15203000_cmd()
126 	mutex_unlock(&led->priv->lock);  in el15203000_cmd()
134 	struct el15203000_led *led = to_el15203000_led(ldev);  in el15203000_set_blocking()  local
136 	return el15203000_cmd(led, brightness == LED_OFF ? EL_OFF : EL_ON);  in el15203000_set_blocking()
143 	struct el15203000_led *led = to_el15203000_led(ldev);  in el15203000_pattern_set_S()  local
148 		return -EINVAL;  in el15203000_pattern_set_S()
150 	dev_dbg(led->priv->dev, "Breathing mode for 0x%02x(%c)",  in el15203000_pattern_set_S()
151 		led->reg, led->reg);  in el15203000_pattern_set_S()
153 	return el15203000_cmd(led, EL_SCREEN_BREATHING);  in el15203000_pattern_set_S()
194 	struct el15203000_led	*led = to_el15203000_led(ldev);  in el15203000_pattern_set_P()  local
198 		return -EINVAL;  in el15203000_pattern_set_P()
201 		dev_dbg(led->priv->dev, "Cascade mode for 0x%02x(%c)",  in el15203000_pattern_set_P()
202 			led->reg, led->reg);  in el15203000_pattern_set_P()
206 		dev_dbg(led->priv->dev, "Inverse cascade mode for 0x%02x(%c)",  in el15203000_pattern_set_P()
207 			led->reg, led->reg);  in el15203000_pattern_set_P()
211 		dev_dbg(led->priv->dev, "Bounce mode for 0x%02x(%c)",  in el15203000_pattern_set_P()
212 			led->reg, led->reg);  in el15203000_pattern_set_P()
216 		dev_dbg(led->priv->dev, "Inverse bounce mode for 0x%02x(%c)",  in el15203000_pattern_set_P()
217 			led->reg, led->reg);  in el15203000_pattern_set_P()
221 		dev_err(led->priv->dev, "Invalid hw_pattern for 0x%02x(%c)!",  in el15203000_pattern_set_P()
222 			led->reg, led->reg);  in el15203000_pattern_set_P()
224 		return -EINVAL;  in el15203000_pattern_set_P()
227 	return el15203000_cmd(led, cmd);  in el15203000_pattern_set_P()
232 	struct el15203000_led *led = to_el15203000_led(ldev);  in el15203000_pattern_clear()  local
234 	return el15203000_cmd(led, EL_OFF);  in el15203000_pattern_clear()
239 	struct el15203000_led	*led = priv->leds;  in el15203000_probe_dt()  local
243 	device_for_each_child_node(priv->dev, child) {  in el15203000_probe_dt()
246 		ret = fwnode_property_read_u32(child, "reg", &led->reg);  in el15203000_probe_dt()
248 			dev_err(priv->dev, "LED without ID number");  in el15203000_probe_dt()
252 		if (led->reg > U8_MAX) {  in el15203000_probe_dt()
253 			dev_err(priv->dev, "LED value %d is invalid", led->reg);  in el15203000_probe_dt()
254 			ret = -EINVAL;  in el15203000_probe_dt()
258 		led->priv			  = priv;  in el15203000_probe_dt()
259 		led->ldev.max_brightness	  = LED_ON;  in el15203000_probe_dt()
260 		led->ldev.brightness_set_blocking = el15203000_set_blocking;  in el15203000_probe_dt()
262 		if (led->reg == 'S') {  in el15203000_probe_dt()
263 			led->ldev.pattern_set	= el15203000_pattern_set_S;  in el15203000_probe_dt()
264 			led->ldev.pattern_clear	= el15203000_pattern_clear;  in el15203000_probe_dt()
265 		} else if (led->reg == 'P') {  in el15203000_probe_dt()
266 			led->ldev.pattern_set	= el15203000_pattern_set_P;  in el15203000_probe_dt()
267 			led->ldev.pattern_clear	= el15203000_pattern_clear;  in el15203000_probe_dt()
271 		ret = devm_led_classdev_register_ext(priv->dev, &led->ldev,  in el15203000_probe_dt()
274 			dev_err(priv->dev,  in el15203000_probe_dt()
275 				"failed to register LED device %s, err %d",  in el15203000_probe_dt()
276 				led->ldev.name, ret);  in el15203000_probe_dt()
280 		led++;  in el15203000_probe_dt()
295 	count = device_get_child_node_count(&spi->dev);  in el15203000_probe()
297 		dev_err(&spi->dev, "LEDs are not defined in device tree!");  in el15203000_probe()
298 		return -ENODEV;  in el15203000_probe()
301 	priv = devm_kzalloc(&spi->dev, struct_size(priv, leds, count),  in el15203000_probe()
304 		return -ENOMEM;  in el15203000_probe()
306 	mutex_init(&priv->lock);  in el15203000_probe()
307 	priv->count	= count;  in el15203000_probe()
308 	priv->dev	= &spi->dev;  in el15203000_probe()
309 	priv->spi	= spi;  in el15203000_probe()
310 	priv->delay	= jiffies -  in el15203000_probe()
322 	mutex_destroy(&priv->lock);  in el15203000_remove()
344 MODULE_DESCRIPTION("el15203000 LED driver");