1 // SPDX-License-Identifier: GPL-2.0
36 #define PA_LCD_UD		BIT(3)
45 #define PC_RST_BRIDGE_N		BIT(3)
68 	u8 port_states[3];
83 	state->port_states[reg - REG_PORTA] = val;  in attiny_set_port_state()
84 	return regmap_write(state->regmap, reg, val);  in attiny_set_port_state()
89 	return state->port_states[reg - REG_PORTA];  in attiny_get_port_state()
96 	mutex_lock(&state->lock);  in attiny_lcd_power_enable()
117 	mutex_unlock(&state->lock);  in attiny_lcd_power_enable()
126 	mutex_lock(&state->lock);  in attiny_lcd_power_disable()
128 	regmap_write(rdev->regmap, REG_PWM, 0);  in attiny_lcd_power_disable()
138 	mutex_unlock(&state->lock);  in attiny_lcd_power_disable()
149 	mutex_lock(&state->lock);  in attiny_lcd_power_is_enabled()
152 		ret = regmap_read(rdev->regmap, REG_PORTC, &data);  in attiny_lcd_power_is_enabled()
158 	mutex_unlock(&state->lock);  in attiny_lcd_power_is_enabled()
179 	.name	= "tc358762-power",
188 	struct regmap *regmap = state->regmap;  in attiny_update_status()
192 	mutex_lock(&state->lock);  in attiny_update_status()
200 	mutex_unlock(&state->lock);  in attiny_update_status()
222 	mutex_lock(&state->lock);  in attiny_gpio_set()
234 		regmap_write(state->regmap, REG_ADDR_H, 0x04);  in attiny_gpio_set()
236 		regmap_write(state->regmap, REG_ADDR_L, 0x7c);  in attiny_gpio_set()
238 		regmap_write(state->regmap, REG_WRITE_DATA_H, 0x00);  in attiny_gpio_set()
240 		regmap_write(state->regmap, REG_WRITE_DATA_L, 0x00);  in attiny_gpio_set()
245 	mutex_unlock(&state->lock);  in attiny_gpio_set()
256 	msgs[0].addr = client->addr;  in attiny_i2c_read()
261 	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));  in attiny_i2c_read()
263 		return -EIO;  in attiny_i2c_read()
268 	msgs[0].addr = client->addr;  in attiny_i2c_read()
273 	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));  in attiny_i2c_read()
275 		return -EIO;  in attiny_i2c_read()
295 	state = devm_kzalloc(&i2c->dev, sizeof(*state), GFP_KERNEL);  in attiny_i2c_probe()
297 		return -ENOMEM;  in attiny_i2c_probe()
299 	mutex_init(&state->lock);  in attiny_i2c_probe()
305 		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",  in attiny_i2c_probe()
312 		dev_err(&i2c->dev, "Failed to read REG_ID reg: %d\n", ret);  in attiny_i2c_probe()
321 		dev_err(&i2c->dev, "Unknown Atmel firmware revision: 0x%02x\n", data);  in attiny_i2c_probe()
322 		ret = -ENODEV;  in attiny_i2c_probe()
330 	config.dev = &i2c->dev;  in attiny_i2c_probe()
332 	config.of_node = i2c->dev.of_node;  in attiny_i2c_probe()
336 	rdev = devm_regulator_register(&i2c->dev, &attiny_regulator, &config);  in attiny_i2c_probe()
338 		dev_err(&i2c->dev, "Failed to register ATTINY regulator\n");  in attiny_i2c_probe()
346 	state->regmap = regmap;  in attiny_i2c_probe()
348 	bl = devm_backlight_device_register(&i2c->dev, dev_name(&i2c->dev),  in attiny_i2c_probe()
349 					    &i2c->dev, state, &attiny_bl,  in attiny_i2c_probe()
356 	bl->props.brightness = 0xff;  in attiny_i2c_probe()
358 	state->gc.parent = &i2c->dev;  in attiny_i2c_probe()
359 	state->gc.label = i2c->name;  in attiny_i2c_probe()
360 	state->gc.owner = THIS_MODULE;  in attiny_i2c_probe()
361 	state->gc.base = -1;  in attiny_i2c_probe()
362 	state->gc.ngpio = NUM_GPIO;  in attiny_i2c_probe()
364 	state->gc.set = attiny_gpio_set;  in attiny_i2c_probe()
365 	state->gc.get_direction = attiny_gpio_get_direction;  in attiny_i2c_probe()
366 	state->gc.can_sleep = true;  in attiny_i2c_probe()
368 	ret = devm_gpiochip_add_data(&i2c->dev, &state->gc, state);  in attiny_i2c_probe()
370 		dev_err(&i2c->dev, "Failed to create gpiochip: %d\n", ret);  in attiny_i2c_probe()
377 	mutex_destroy(&state->lock);  in attiny_i2c_probe()
386 	mutex_destroy(&state->lock);  in attiny_i2c_remove()
390 	{ .compatible = "raspberrypi,7inch-touchscreen-panel-regulator" },
408 MODULE_DESCRIPTION("Regulator device driver for Raspberry Pi 7-inch touchscreen");