1 // SPDX-License-Identifier: GPL-2.0
22 #define REG_ID		0x80
23 #define REG_PORTA	0x81
26 #define REG_PORTB	0x82
27 #define REG_POWERON	0x85
28 #define REG_PWM		0x86
42 	regmap_write(rdev->regmap, REG_POWERON, 1);  in attiny_lcd_power_enable()
46 	for (i = 0; i < 20; i++) {  in attiny_lcd_power_enable()
47 		ret = regmap_read(rdev->regmap, REG_PORTB, &data);  in attiny_lcd_power_enable()
49 			if (data & BIT(0))  in attiny_lcd_power_enable()
64 	regmap_write(rdev->regmap, REG_PORTA, BIT(2));  in attiny_lcd_power_enable()
66 	return 0;  in attiny_lcd_power_enable()
71 	regmap_write(rdev->regmap, REG_PWM, 0);  in attiny_lcd_power_disable()
72 	regmap_write(rdev->regmap, REG_POWERON, 0);  in attiny_lcd_power_disable()
74 	return 0;  in attiny_lcd_power_disable()
82 	for (i = 0; i < 10; i++) {  in attiny_lcd_power_is_enabled()
83 		ret = regmap_read(rdev->regmap, REG_POWERON, &data);  in attiny_lcd_power_is_enabled()
88 	if (ret < 0)  in attiny_lcd_power_is_enabled()
91 	if (!(data & BIT(0)))  in attiny_lcd_power_is_enabled()
92 		return 0;  in attiny_lcd_power_is_enabled()
94 	for (i = 0; i < 10; i++) {  in attiny_lcd_power_is_enabled()
95 		ret = regmap_read(rdev->regmap, REG_PORTB, &data);  in attiny_lcd_power_is_enabled()
101 	if (ret < 0)  in attiny_lcd_power_is_enabled()
104 	return data & BIT(0);  in attiny_lcd_power_is_enabled()
120 	.name	= "tc358762-power",
129 	int brightness = bl->props.brightness;  in attiny_update_status()
132 	if (bl->props.power != FB_BLANK_UNBLANK ||  in attiny_update_status()
133 	    bl->props.fb_blank != FB_BLANK_UNBLANK)  in attiny_update_status()
134 		brightness = 0;  in attiny_update_status()
136 	for (i = 0; i < 10; i++) {  in attiny_update_status()
150 	for (i = 0; i < 10; i++) {  in attiny_get_brightness()
184 		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",  in attiny_i2c_probe()
190 	if (ret < 0) {  in attiny_i2c_probe()
191 		dev_err(&i2c->dev, "Failed to read REG_ID reg: %d\n", ret);  in attiny_i2c_probe()
196 	case 0xde: /* ver 1 */  in attiny_i2c_probe()
197 	case 0xc3: /* ver 2 */  in attiny_i2c_probe()
200 		dev_err(&i2c->dev, "Unknown Atmel firmware revision: 0x%02x\n", data);  in attiny_i2c_probe()
201 		return -ENODEV;  in attiny_i2c_probe()
204 	regmap_write(regmap, REG_POWERON, 0);  in attiny_i2c_probe()
207 	config.dev = &i2c->dev;  in attiny_i2c_probe()
209 	config.of_node = i2c->dev.of_node;  in attiny_i2c_probe()
212 	rdev = devm_regulator_register(&i2c->dev, &attiny_regulator, &config);  in attiny_i2c_probe()
214 		dev_err(&i2c->dev, "Failed to register ATTINY regulator\n");  in attiny_i2c_probe()
219 	props.max_brightness = 0xff;  in attiny_i2c_probe()
220 	bl = devm_backlight_device_register(&i2c->dev,  in attiny_i2c_probe()
221 					    "7inch-touchscreen-panel-bl",  in attiny_i2c_probe()
222 					    &i2c->dev, regmap, &attiny_bl,  in attiny_i2c_probe()
227 	bl->props.brightness = 0xff;  in attiny_i2c_probe()
229 	return 0;  in attiny_i2c_probe()
233 	{ .compatible = "raspberrypi,7inch-touchscreen-panel-regulator" },
249 MODULE_DESCRIPTION("Regulator device driver for Raspberry Pi 7-inch touchscreen");