1 // SPDX-License-Identifier: GPL-2.0
4  *  The display also has a SPI interface, but the driver does not support
99 	struct lcd2s_data *lcd2s = lcd->drvdata;  in lcd2s_print()
102 	lcd2s_i2c_master_send(lcd2s->i2c, buf, sizeof(buf));  in lcd2s_print()
108 	struct lcd2s_data *lcd2s = lcd->drvdata;  in lcd2s_gotoxy()
111 	lcd2s_i2c_master_send(lcd2s->i2c, buf, sizeof(buf));  in lcd2s_gotoxy()
118 	struct lcd2s_data *lcd2s = lcd->drvdata;  in lcd2s_home()
120 	lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_CUR_RESET);  in lcd2s_home()
126 	struct lcd2s_data *lcd2s = lcd->drvdata;  in lcd2s_init_display()
128 	/* turn everything off, but display on */  in lcd2s_init_display()
129 	lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_DISPLAY_ON);  in lcd2s_init_display()
130 	lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_BACKLIGHT_OFF);  in lcd2s_init_display()
131 	lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_CUR_MOVES_FWD);  in lcd2s_init_display()
132 	lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_CUR_BLINK_OFF);  in lcd2s_init_display()
133 	lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_CUR_UL_OFF);  in lcd2s_init_display()
134 	lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_CLEAR);  in lcd2s_init_display()
141 	struct lcd2s_data *lcd2s = lcd->drvdata;  in lcd2s_shift_cursor()
144 		lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_MOV_CUR_LEFT);  in lcd2s_shift_cursor()
146 		lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_MOV_CUR_RIGHT);  in lcd2s_shift_cursor()
153 	struct lcd2s_data *lcd2s = lcd->drvdata;  in lcd2s_shift_display()
156 		lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_SHIFT_LEFT);  in lcd2s_shift_display()
158 		lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_SHIFT_RIGHT);  in lcd2s_shift_display()
165 	struct lcd2s_data *lcd2s = lcd->drvdata;  in lcd2s_backlight()
168 		lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_BACKLIGHT_ON);  in lcd2s_backlight()
170 		lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_BACKLIGHT_OFF);  in lcd2s_backlight()
175 	struct lcd2s_data *lcd2s = lcd->drvdata;  in lcd2s_display()
178 		lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_DISPLAY_ON);  in lcd2s_display()
180 		lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_DISPLAY_OFF);  in lcd2s_display()
187 	struct lcd2s_data *lcd2s = lcd->drvdata;  in lcd2s_cursor()
190 		lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_CUR_UL_ON);  in lcd2s_cursor()
192 		lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_CUR_UL_OFF);  in lcd2s_cursor()
199 	struct lcd2s_data *lcd2s = lcd->drvdata;  in lcd2s_blink()
202 		lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_CUR_BLINK_ON);  in lcd2s_blink()
204 		lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_CUR_BLINK_OFF);  in lcd2s_blink()
228 	struct lcd2s_data *lcd2s = lcd->drvdata;  in lcd2s_redefine_char()
238 	buf[1] = *(esc++) - '0';  in lcd2s_redefine_char()
260 	lcd2s_i2c_master_send(lcd2s->i2c, buf, sizeof(buf));  in lcd2s_redefine_char()
266 	struct lcd2s_data *lcd2s = lcd->drvdata;  in lcd2s_clear_display()
269 	lcd2s_i2c_smbus_write_byte(lcd2s->i2c, LCD2S_CMD_CLEAR);  in lcd2s_clear_display()
282 	.display	= lcd2s_display,
296 	if (!i2c_check_functionality(i2c->adapter,  in lcd2s_i2c_probe()
299 		return -EIO;  in lcd2s_i2c_probe()
301 	lcd2s = devm_kzalloc(&i2c->dev, sizeof(*lcd2s), GFP_KERNEL);  in lcd2s_i2c_probe()
303 		return -ENOMEM;  in lcd2s_i2c_probe()
305 	/* Test, if the display is responding */  in lcd2s_i2c_probe()
312 		return -ENOMEM;  in lcd2s_i2c_probe()
314 	lcd->drvdata = lcd2s;  in lcd2s_i2c_probe()
315 	lcd2s->i2c = i2c;  in lcd2s_i2c_probe()
316 	lcd2s->charlcd = lcd;  in lcd2s_i2c_probe()
319 	err = device_property_read_u32(&i2c->dev, "display-height-chars",  in lcd2s_i2c_probe()
320 			&lcd->height);  in lcd2s_i2c_probe()
324 	err = device_property_read_u32(&i2c->dev, "display-width-chars",  in lcd2s_i2c_probe()
325 			&lcd->width);  in lcd2s_i2c_probe()
329 	lcd->ops = &lcd2s_ops;  in lcd2s_i2c_probe()
331 	err = charlcd_register(lcd2s->charlcd);  in lcd2s_i2c_probe()
339 	charlcd_free(lcd2s->charlcd);  in lcd2s_i2c_probe()
347 	charlcd_unregister(lcd2s->charlcd);  in lcd2s_i2c_remove()
348 	charlcd_free(lcd2s->charlcd);  in lcd2s_i2c_remove()
374 MODULE_DESCRIPTION("LCD2S character display driver");