3  * lms501kf03 TFT LCD panel driver.
10 #include <linux/lcd.h>
101 static int lms501kf03_spi_write_byte(struct lms501kf03 *lcd, int addr, int data)  in lms501kf03_spi_write_byte()  argument
116 	return spi_sync(lcd->spi, &msg);  in lms501kf03_spi_write_byte()
119 static int lms501kf03_spi_write(struct lms501kf03 *lcd, unsigned char address,  in lms501kf03_spi_write()  argument
122 	return lms501kf03_spi_write_byte(lcd, address, command);  in lms501kf03_spi_write()
125 static int lms501kf03_panel_send_sequence(struct lms501kf03 *lcd,  in lms501kf03_panel_send_sequence()  argument
133 			ret = lms501kf03_spi_write(lcd, COMMAND_ONLY, wbuf[i]);  in lms501kf03_panel_send_sequence()
135 			ret = lms501kf03_spi_write(lcd, DATA_ONLY, wbuf[i]);  in lms501kf03_panel_send_sequence()
144 static int lms501kf03_ldi_init(struct lms501kf03 *lcd)  in lms501kf03_ldi_init()  argument
178 		ret = lms501kf03_panel_send_sequence(lcd, init_seq[i],  in lms501kf03_ldi_init()
193 static int lms501kf03_ldi_enable(struct lms501kf03 *lcd)  in lms501kf03_ldi_enable()  argument
195 	return lms501kf03_panel_send_sequence(lcd, seq_display_on,  in lms501kf03_ldi_enable()
199 static int lms501kf03_ldi_disable(struct lms501kf03 *lcd)  in lms501kf03_ldi_disable()  argument
201 	return lms501kf03_panel_send_sequence(lcd, seq_display_off,  in lms501kf03_ldi_disable()
210 static int lms501kf03_power_on(struct lms501kf03 *lcd)  in lms501kf03_power_on()  argument
215 	pd = lcd->lcd_pd;  in lms501kf03_power_on()
218 		dev_err(lcd->dev, "power_on is NULL.\n");  in lms501kf03_power_on()
222 	pd->power_on(lcd->ld, 1);  in lms501kf03_power_on()
226 		dev_err(lcd->dev, "reset is NULL.\n");  in lms501kf03_power_on()
230 	pd->reset(lcd->ld);  in lms501kf03_power_on()
233 	ret = lms501kf03_ldi_init(lcd);  in lms501kf03_power_on()
235 		dev_err(lcd->dev, "failed to initialize ldi.\n");  in lms501kf03_power_on()
239 	ret = lms501kf03_ldi_enable(lcd);  in lms501kf03_power_on()
241 		dev_err(lcd->dev, "failed to enable ldi.\n");  in lms501kf03_power_on()
248 static int lms501kf03_power_off(struct lms501kf03 *lcd)  in lms501kf03_power_off()  argument
253 	pd = lcd->lcd_pd;  in lms501kf03_power_off()
255 	ret = lms501kf03_ldi_disable(lcd);  in lms501kf03_power_off()
257 		dev_err(lcd->dev, "lcd setting failed.\n");  in lms501kf03_power_off()
263 	pd->power_on(lcd->ld, 0);  in lms501kf03_power_off()
268 static int lms501kf03_power(struct lms501kf03 *lcd, int power)  in lms501kf03_power()  argument
273 		!lms501kf03_power_is_on(lcd->power))  in lms501kf03_power()
274 		ret = lms501kf03_power_on(lcd);  in lms501kf03_power()
276 		lms501kf03_power_is_on(lcd->power))  in lms501kf03_power()
277 		ret = lms501kf03_power_off(lcd);  in lms501kf03_power()
280 		lcd->power = power;  in lms501kf03_power()
287 	struct lms501kf03 *lcd = lcd_get_data(ld);  in lms501kf03_get_power()  local
289 	return lcd->power;  in lms501kf03_get_power()
294 	struct lms501kf03 *lcd = lcd_get_data(ld);  in lms501kf03_set_power()  local
298 		dev_err(lcd->dev, "power value should be 0, 1 or 4.\n");  in lms501kf03_set_power()
302 	return lms501kf03_power(lcd, power);  in lms501kf03_set_power()
312 	struct lms501kf03 *lcd = NULL;  in lms501kf03_probe()  local
316 	lcd = devm_kzalloc(&spi->dev, sizeof(struct lms501kf03), GFP_KERNEL);  in lms501kf03_probe()
317 	if (!lcd)  in lms501kf03_probe()
320 	/* lms501kf03 lcd panel uses 3-wire 9-bit SPI Mode. */  in lms501kf03_probe()
329 	lcd->spi = spi;  in lms501kf03_probe()
330 	lcd->dev = &spi->dev;  in lms501kf03_probe()
332 	lcd->lcd_pd = dev_get_platdata(&spi->dev);  in lms501kf03_probe()
333 	if (!lcd->lcd_pd) {  in lms501kf03_probe()
338 	ld = devm_lcd_device_register(&spi->dev, "lms501kf03", &spi->dev, lcd,  in lms501kf03_probe()
343 	lcd->ld = ld;  in lms501kf03_probe()
345 	if (!lcd->lcd_pd->lcd_enabled) {  in lms501kf03_probe()
347 		 * if lcd panel was off from bootloader then  in lms501kf03_probe()
348 		 * current lcd status is powerdown and then  in lms501kf03_probe()
349 		 * it enables lcd panel.  in lms501kf03_probe()
351 		lcd->power = LCD_POWER_OFF;  in lms501kf03_probe()
353 		lms501kf03_power(lcd, LCD_POWER_ON);  in lms501kf03_probe()
355 		lcd->power = LCD_POWER_ON;  in lms501kf03_probe()
358 	spi_set_drvdata(spi, lcd);  in lms501kf03_probe()
367 	struct lms501kf03 *lcd = spi_get_drvdata(spi);  in lms501kf03_remove()  local
369 	lms501kf03_power(lcd, LCD_POWER_OFF);  in lms501kf03_remove()
375 	struct lms501kf03 *lcd = dev_get_drvdata(dev);  in lms501kf03_suspend()  local
377 	dev_dbg(dev, "lcd->power = %d\n", lcd->power);  in lms501kf03_suspend()
380 	 * when lcd panel is suspend, lcd panel becomes off  in lms501kf03_suspend()
383 	return lms501kf03_power(lcd, LCD_POWER_OFF);  in lms501kf03_suspend()
388 	struct lms501kf03 *lcd = dev_get_drvdata(dev);  in lms501kf03_resume()  local
390 	lcd->power = LCD_POWER_OFF;  in lms501kf03_resume()
392 	return lms501kf03_power(lcd, LCD_POWER_ON);  in lms501kf03_resume()
401 	struct lms501kf03 *lcd = spi_get_drvdata(spi);  in lms501kf03_shutdown()  local
403 	lms501kf03_power(lcd, LCD_POWER_OFF);  in lms501kf03_shutdown()
419 MODULE_DESCRIPTION("lms501kf03 LCD Driver");