1 // SPDX-License-Identifier: GPL-2.0-only
8  *   http://www.issi.com/US/product-analog-fxled-driver.shtml
9  *   http://www.si-en.com/product.asp?parentid=890
39 	u8 channel; /* 1-based, max priv->cdef->channels */
51  * struct is31fl32xx_chipdef - chip-specific attributes
55  * @global_control_reg  : address of Global Control register (optional)
67  * If non-NULL, @reset_func will be called during probing to set all
142 	dev_dbg(&priv->client->dev, "writing register 0x%02X=0x%02X", reg, val);  in is31fl32xx_write()
144 	ret =  i2c_smbus_write_byte_data(priv->client, reg, val);  in is31fl32xx_write()
146 		dev_err(&priv->client->dev,  in is31fl32xx_write()
168 	for (i = 0; i < priv->cdef->channels; i++) {  in is31fl3216_reset()
169 		ret = is31fl32xx_write(priv, priv->cdef->pwm_register_base+i,  in is31fl3216_reset()
174 	ret = is31fl32xx_write(priv, priv->cdef->pwm_update_reg, 0);  in is31fl3216_reset()
188  * Custom Software-Shutdown function for IS31FL3216 because it does not have
204  * - All referenced data is read-only after probe()
205  * - The I2C core has a mutex on to protect the bus
206  * - There are no read/modify/write operations
207  * - Intervening operations between the write of the PWM register
228 	const struct is31fl32xx_chipdef *cdef = led_data->priv->cdef;  in is31fl32xx_brightness_set()
232 	dev_dbg(led_cdev->dev, "%s: %d\n", __func__, brightness);  in is31fl32xx_brightness_set()
234 	/* NOTE: led_data->channel is 1-based */  in is31fl32xx_brightness_set()
235 	if (cdef->pwm_registers_reversed)  in is31fl32xx_brightness_set()
236 		pwm_register_offset = cdef->channels - led_data->channel;  in is31fl32xx_brightness_set()
238 		pwm_register_offset = led_data->channel - 1;  in is31fl32xx_brightness_set()
240 	ret = is31fl32xx_write(led_data->priv,  in is31fl32xx_brightness_set()
241 			       cdef->pwm_register_base + pwm_register_offset,  in is31fl32xx_brightness_set()
246 	return is31fl32xx_write(led_data->priv, cdef->pwm_update_reg, 0);  in is31fl32xx_brightness_set()
251 	const struct is31fl32xx_chipdef *cdef = priv->cdef;  in is31fl32xx_reset_regs()
254 	if (cdef->reset_reg != IS31FL32XX_REG_NONE) {  in is31fl32xx_reset_regs()
255 		ret = is31fl32xx_write(priv, cdef->reset_reg, 0);  in is31fl32xx_reset_regs()
260 	if (cdef->reset_func)  in is31fl32xx_reset_regs()
261 		return cdef->reset_func(priv);  in is31fl32xx_reset_regs()
269 	const struct is31fl32xx_chipdef *cdef = priv->cdef;  in is31fl32xx_software_shutdown()
272 	if (cdef->shutdown_reg != IS31FL32XX_REG_NONE) {  in is31fl32xx_software_shutdown()
275 		ret = is31fl32xx_write(priv, cdef->shutdown_reg, value);  in is31fl32xx_software_shutdown()
280 	if (cdef->sw_shutdown_func)  in is31fl32xx_software_shutdown()
281 		return cdef->sw_shutdown_func(priv, enable);  in is31fl32xx_software_shutdown()
288 	const struct is31fl32xx_chipdef *cdef = priv->cdef;  in is31fl32xx_init_regs()
299 	if (cdef->led_control_register_base != IS31FL32XX_REG_NONE) {  in is31fl32xx_init_regs()
301 		    GENMASK(cdef->enable_bits_per_led_control_register-1, 0);  in is31fl32xx_init_regs()
302 		u8 num_regs = cdef->channels /  in is31fl32xx_init_regs()
303 				cdef->enable_bits_per_led_control_register;  in is31fl32xx_init_regs()
308 					       cdef->led_control_register_base+i,  in is31fl32xx_init_regs()
319 	if (cdef->global_control_reg != IS31FL32XX_REG_NONE) {  in is31fl32xx_init_regs()
320 		ret = is31fl32xx_write(priv, cdef->global_control_reg, 0x00);  in is31fl32xx_init_regs()
332 	struct led_classdev *cdev = &led_data->cdev;  in is31fl32xx_parse_child_dt()
337 	if (ret || reg < 1 || reg > led_data->priv->cdef->channels) {  in is31fl32xx_parse_child_dt()
341 		return -EINVAL;  in is31fl32xx_parse_child_dt()
343 	led_data->channel = reg;  in is31fl32xx_parse_child_dt()
345 	cdev->brightness_set_blocking = is31fl32xx_brightness_set;  in is31fl32xx_parse_child_dt()
356 	for (i = 0; i < priv->num_leds; i++) {  in is31fl32xx_find_led_data()
357 		if (priv->leds[i].channel == channel)  in is31fl32xx_find_led_data()
358 			return &priv->leds[i];  in is31fl32xx_find_led_data()
373 			&priv->leds[priv->num_leds];  in is31fl32xx_parse_dt()
376 		led_data->priv = priv;  in is31fl32xx_parse_dt()
384 							  led_data->channel);  in is31fl32xx_parse_dt()
389 			ret = -EINVAL;  in is31fl32xx_parse_dt()
395 		ret = devm_led_classdev_register_ext(dev, &led_data->cdev,  in is31fl32xx_parse_dt()
403 		priv->num_leds++;  in is31fl32xx_parse_dt()
417 	{ .compatible = "si-en,sn3218",    .data = &is31fl3218_cdef, },
419 	{ .compatible = "si-en,sn3216",    .data = &is31fl3216_cdef, },
429 	struct device *dev = &client->dev;  in is31fl32xx_probe()
438 		return -EINVAL;  in is31fl32xx_probe()
443 		return -ENOMEM;  in is31fl32xx_probe()
445 	priv->client = client;  in is31fl32xx_probe()
446 	priv->cdef = cdef;  in is31fl32xx_probe()
467 		dev_err(&client->dev, "Failed to reset registers on removal (%pe)\n",  in is31fl32xx_remove()
472  * i2c-core (and modalias) requires that id_table be properly filled,