1 // SPDX-License-Identifier: GPL-2.0-only
3  * l4f00242t03.c -- support for Epson L4F00242T03 LCD
5  * Copyright 2007-2009 Freescale Semiconductor, Inc. All Rights Reserved.
29 	struct gpio_desc *reset;  member
35 	pr_debug("l4f00242t03_reset.\n");  in l4f00242t03_reset()
52 	dev_dbg(&spi->dev, "initializing LCD\n");  in l4f00242t03_lcd_init()
54 	ret = regulator_set_voltage(priv->io_reg, 1800000, 1800000);  in l4f00242t03_lcd_init()
56 		dev_err(&spi->dev, "failed to set the IO regulator voltage.\n");  in l4f00242t03_lcd_init()
59 	ret = regulator_enable(priv->io_reg);  in l4f00242t03_lcd_init()
61 		dev_err(&spi->dev, "failed to enable the IO regulator.\n");  in l4f00242t03_lcd_init()
65 	ret = regulator_set_voltage(priv->core_reg, 2800000, 2800000);  in l4f00242t03_lcd_init()
67 		dev_err(&spi->dev, "failed to set the core regulator voltage.\n");  in l4f00242t03_lcd_init()
68 		regulator_disable(priv->io_reg);  in l4f00242t03_lcd_init()
71 	ret = regulator_enable(priv->core_reg);  in l4f00242t03_lcd_init()
73 		dev_err(&spi->dev, "failed to enable the core regulator.\n");  in l4f00242t03_lcd_init()
74 		regulator_disable(priv->io_reg);  in l4f00242t03_lcd_init()
78 	l4f00242t03_reset(priv->reset);  in l4f00242t03_lcd_init()
80 	gpiod_set_value(priv->enable, 1);  in l4f00242t03_lcd_init()
89 	dev_dbg(&spi->dev, "Powering down LCD\n");  in l4f00242t03_lcd_powerdown()
91 	gpiod_set_value(priv->enable, 0);  in l4f00242t03_lcd_powerdown()
93 	regulator_disable(priv->io_reg);  in l4f00242t03_lcd_powerdown()
94 	regulator_disable(priv->core_reg);  in l4f00242t03_lcd_powerdown()
101 	return priv->lcd_state;  in l4f00242t03_lcd_power_get()
107 	struct spi_device *spi = priv->spi;  in l4f00242t03_lcd_power_set()
116 		if (priv->lcd_state <= LCD_POWER_REDUCED) {  in l4f00242t03_lcd_power_set()
118 		} else if (priv->lcd_state < LCD_POWER_OFF) {  in l4f00242t03_lcd_power_set()
119 			dev_dbg(&spi->dev, "Resuming LCD\n");  in l4f00242t03_lcd_power_set()
125 			/* priv->lcd_state == LCD_POWER_OFF */  in l4f00242t03_lcd_power_set()
127 			priv->lcd_state = LCD_POWER_REDUCED_VSYNC_SUSPEND;  in l4f00242t03_lcd_power_set()
128 			l4f00242t03_lcd_power_set(priv->ld, power);  in l4f00242t03_lcd_power_set()
131 		if (priv->lcd_state <= LCD_POWER_REDUCED) {  in l4f00242t03_lcd_power_set()
133 			dev_dbg(&spi->dev, "Standby the LCD\n");  in l4f00242t03_lcd_power_set()
138 		} else if (priv->lcd_state < LCD_POWER_OFF) {  in l4f00242t03_lcd_power_set()
141 			/* priv->lcd_state == LCD_POWER_OFF */  in l4f00242t03_lcd_power_set()
143 			priv->lcd_state = LCD_POWER_ON;  in l4f00242t03_lcd_power_set()
148 		if (priv->lcd_state != LCD_POWER_OFF) {  in l4f00242t03_lcd_power_set()
156 	priv->lcd_state = power;  in l4f00242t03_lcd_power_set()
171 	priv = devm_kzalloc(&spi->dev, sizeof(struct l4f00242t03_priv),  in l4f00242t03_probe()
174 		return -ENOMEM;  in l4f00242t03_probe()
177 	spi->bits_per_word = 9;  in l4f00242t03_probe()
180 		return dev_err_probe(&spi->dev, ret, "Unable to setup spi.\n");  in l4f00242t03_probe()
182 	priv->spi = spi;  in l4f00242t03_probe()
184 	priv->reset = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_HIGH);  in l4f00242t03_probe()
185 	if (IS_ERR(priv->reset))  in l4f00242t03_probe()
186 		return dev_err_probe(&spi->dev, PTR_ERR(priv->reset),  in l4f00242t03_probe()
187 				     "Unable to get the lcd l4f00242t03 reset gpio.\n");  in l4f00242t03_probe()
188 	gpiod_set_consumer_name(priv->reset, "lcd l4f00242t03 reset");  in l4f00242t03_probe()
190 	priv->enable = devm_gpiod_get(&spi->dev, "enable", GPIOD_OUT_LOW);  in l4f00242t03_probe()
191 	if (IS_ERR(priv->enable))  in l4f00242t03_probe()
192 		return dev_err_probe(&spi->dev, PTR_ERR(priv->enable),  in l4f00242t03_probe()
193 				     "Unable to get the lcd l4f00242t03 data en gpio.\n");  in l4f00242t03_probe()
194 	gpiod_set_consumer_name(priv->enable, "lcd l4f00242t03 data enable");  in l4f00242t03_probe()
196 	priv->io_reg = devm_regulator_get(&spi->dev, "vdd");  in l4f00242t03_probe()
197 	if (IS_ERR(priv->io_reg))  in l4f00242t03_probe()
198 		return dev_err_probe(&spi->dev, PTR_ERR(priv->io_reg),  in l4f00242t03_probe()
199 				     "%s: Unable to get the IO regulator\n",  in l4f00242t03_probe()
202 	priv->core_reg = devm_regulator_get(&spi->dev, "vcore");  in l4f00242t03_probe()
203 	if (IS_ERR(priv->core_reg))  in l4f00242t03_probe()
204 		return dev_err_probe(&spi->dev, PTR_ERR(priv->core_reg),  in l4f00242t03_probe()
205 				     "%s: Unable to get the core regulator\n",  in l4f00242t03_probe()
208 	priv->ld = devm_lcd_device_register(&spi->dev, "l4f00242t03", &spi->dev,  in l4f00242t03_probe()
210 	if (IS_ERR(priv->ld))  in l4f00242t03_probe()
211 		return PTR_ERR(priv->ld);  in l4f00242t03_probe()
215 	priv->lcd_state = LCD_POWER_REDUCED_VSYNC_SUSPEND;  in l4f00242t03_probe()
216 	l4f00242t03_lcd_power_set(priv->ld, LCD_POWER_ON);  in l4f00242t03_probe()
218 	dev_info(&spi->dev, "Epson l4f00242t03 lcd probed.\n");  in l4f00242t03_probe()
227 	l4f00242t03_lcd_power_set(priv->ld, LCD_POWER_OFF);  in l4f00242t03_remove()
235 		l4f00242t03_lcd_power_set(priv->ld, LCD_POWER_OFF);  in l4f00242t03_shutdown()