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
41 	regmap_write(rdev->regmap, REG_POWERON, 1);  in attiny_lcd_power_enable()
43 	regmap_read_poll_timeout(rdev->regmap, REG_PORTB, data,  in attiny_lcd_power_enable()
44 					data & BIT(0), 10, 1000000);  in attiny_lcd_power_enable()
51 	regmap_write(rdev->regmap, REG_PORTA, BIT(2));  in attiny_lcd_power_enable()
53 	return 0;  in attiny_lcd_power_enable()
58 	regmap_write(rdev->regmap, REG_PWM, 0);  in attiny_lcd_power_disable()
59 	regmap_write(rdev->regmap, REG_POWERON, 0);  in attiny_lcd_power_disable()
61 	return 0;  in attiny_lcd_power_disable()
69 	ret = regmap_read(rdev->regmap, REG_POWERON, &data);  in attiny_lcd_power_is_enabled()
70 	if (ret < 0)  in attiny_lcd_power_is_enabled()
73 	if (!(data & BIT(0)))  in attiny_lcd_power_is_enabled()
74 		return 0;  in attiny_lcd_power_is_enabled()
76 	ret = regmap_read(rdev->regmap, REG_PORTB, &data);  in attiny_lcd_power_is_enabled()
77 	if (ret < 0)  in attiny_lcd_power_is_enabled()
80 	return data & BIT(0);  in attiny_lcd_power_is_enabled()
96 	.name	= "tc358762-power",
105 	int brightness = bl->props.brightness;  in attiny_update_status()
107 	if (bl->props.power != FB_BLANK_UNBLANK ||  in attiny_update_status()
108 	    bl->props.fb_blank != FB_BLANK_UNBLANK)  in attiny_update_status()
109 		brightness = 0;  in attiny_update_status()
148 		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",  in attiny_i2c_probe()
154 	if (ret < 0) {  in attiny_i2c_probe()
155 		dev_err(&i2c->dev, "Failed to read REG_ID reg: %d\n", ret);  in attiny_i2c_probe()
160 	case 0xde: /* ver 1 */  in attiny_i2c_probe()
161 	case 0xc3: /* ver 2 */  in attiny_i2c_probe()
164 		dev_err(&i2c->dev, "Unknown Atmel firmware revision: 0x%02x\n", data);  in attiny_i2c_probe()
165 		return -ENODEV;  in attiny_i2c_probe()
168 	regmap_write(regmap, REG_POWERON, 0);  in attiny_i2c_probe()
171 	config.dev = &i2c->dev;  in attiny_i2c_probe()
173 	config.of_node = i2c->dev.of_node;  in attiny_i2c_probe()
176 	rdev = devm_regulator_register(&i2c->dev, &attiny_regulator, &config);  in attiny_i2c_probe()
178 		dev_err(&i2c->dev, "Failed to register ATTINY regulator\n");  in attiny_i2c_probe()
183 	props.max_brightness = 0xff;  in attiny_i2c_probe()
184 	bl = devm_backlight_device_register(&i2c->dev,  in attiny_i2c_probe()
185 					    "7inch-touchscreen-panel-bl",  in attiny_i2c_probe()
186 					    &i2c->dev, regmap, &attiny_bl,  in attiny_i2c_probe()
191 	bl->props.brightness = 0xff;  in attiny_i2c_probe()
193 	return 0;  in attiny_i2c_probe()
197 	{ .compatible = "raspberrypi,7inch-touchscreen-panel-regulator" },
213 MODULE_DESCRIPTION("Regulator device driver for Raspberry Pi 7-inch touchscreen");