1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Driver for the Himax HX-8357 LCD Controller
10 #include <linux/lcd.h>
216 	struct hx8357_data *lcd = lcd_get_data(lcdev);  in hx8357_spi_write_then_read()  local
231 			return -ENOMEM;  in hx8357_spi_write_then_read()
252 	ret = spi_sync(lcd->spi, &msg);  in hx8357_spi_write_then_read()
254 		dev_err(&lcdev->dev, "Couldn't send SPI data\n");  in hx8357_spi_write_then_read()
289 	 * The controller needs 120ms when entering in sleep mode before we can  in hx8357_enter_standby()
306 	 * The controller needs 120ms when exiting from sleep mode before we  in hx8357_exit_standby()
320 	struct hx8357_data *lcd = lcd_get_data(lcdev);  in hx8357_lcd_reset()  local
323 	gpiod_set_value(lcd->reset, 0);  in hx8357_lcd_reset()
325 	gpiod_set_value(lcd->reset, 1);  in hx8357_lcd_reset()
327 	gpiod_set_value(lcd->reset, 0);  in hx8357_lcd_reset()
329 	/* The controller needs 120ms to recover from reset */  in hx8357_lcd_reset()
335 	struct hx8357_data *lcd = lcd_get_data(lcdev);  in hx8357_lcd_init()  local
342 	if (lcd->im_pins) {  in hx8357_lcd_init()
343 		gpiod_set_value_cansleep(lcd->im_pins->desc[0], 1);  in hx8357_lcd_init()
344 		gpiod_set_value_cansleep(lcd->im_pins->desc[1], 0);  in hx8357_lcd_init()
345 		gpiod_set_value_cansleep(lcd->im_pins->desc[2], 1);  in hx8357_lcd_init()
428 	 * The controller needs 120ms to fully recover from exiting sleep mode  in hx8357_lcd_init()
490 	 * The controller needs 120ms to fully recover from exiting sleep mode  in hx8369_lcd_init()
539 	struct hx8357_data *lcd = lcd_get_data(lcdev);  in hx8357_set_power()  local
542 	if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->state))  in hx8357_set_power()
544 	else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->state))  in hx8357_set_power()
548 		lcd->state = power;  in hx8357_set_power()
550 		dev_warn(&lcdev->dev, "failed to set power mode %d\n", power);  in hx8357_set_power()
557 	struct hx8357_data *lcd = lcd_get_data(lcdev);  in hx8357_get_power()  local
559 	return lcd->state;  in hx8357_get_power()
571 	struct device *dev = &spi->dev;  in hx8357_probe()
573 	struct hx8357_data *lcd;  in hx8357_probe()  local
577 	lcd = devm_kzalloc(dev, sizeof(*lcd), GFP_KERNEL);  in hx8357_probe()
578 	if (!lcd)  in hx8357_probe()
579 		return -ENOMEM;  in hx8357_probe()
585 	lcd->spi = spi;  in hx8357_probe()
589 		return -EINVAL;  in hx8357_probe()
591 	lcd->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);  in hx8357_probe()
592 	if (IS_ERR(lcd->reset))  in hx8357_probe()
593 		return dev_err_probe(dev, PTR_ERR(lcd->reset), "failed to request reset GPIO\n");  in hx8357_probe()
594 	gpiod_set_consumer_name(lcd->reset, "hx8357-reset");  in hx8357_probe()
596 	lcd->im_pins = devm_gpiod_get_array_optional(dev, "im", GPIOD_OUT_LOW);  in hx8357_probe()
597 	if (IS_ERR(lcd->im_pins))  in hx8357_probe()
598 		return dev_err_probe(dev, PTR_ERR(lcd->im_pins), "failed to request im GPIOs\n");  in hx8357_probe()
599 	if (lcd->im_pins) {  in hx8357_probe()
600 		if (lcd->im_pins->ndescs < HX8357_NUM_IM_PINS)  in hx8357_probe()
601 			return dev_err_probe(dev, -EINVAL, "not enough im GPIOs\n");  in hx8357_probe()
604 			gpiod_set_consumer_name(lcd->im_pins->desc[i], "im_pins");  in hx8357_probe()
607 	lcdev = devm_lcd_device_register(dev, "mxsfb", dev, lcd, &hx8357_ops);  in hx8357_probe()
648 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
649 MODULE_DESCRIPTION("Himax HX-8357 LCD Driver");