3  * lms501kf03 TFT LCD panel driver.
12 #include <linux/lcd.h>
103 static int lms501kf03_spi_write_byte(struct lms501kf03 *lcd, int addr, int data)  in lms501kf03_spi_write_byte()  argument
118 	return spi_sync(lcd->spi, &msg);  in lms501kf03_spi_write_byte()
121 static int lms501kf03_spi_write(struct lms501kf03 *lcd, unsigned char address,  in lms501kf03_spi_write()  argument
124 	return lms501kf03_spi_write_byte(lcd, address, command);  in lms501kf03_spi_write()
127 static int lms501kf03_panel_send_sequence(struct lms501kf03 *lcd,  in lms501kf03_panel_send_sequence()  argument
135 			ret = lms501kf03_spi_write(lcd, COMMAND_ONLY, wbuf[i]);  in lms501kf03_panel_send_sequence()
137 			ret = lms501kf03_spi_write(lcd, DATA_ONLY, wbuf[i]);  in lms501kf03_panel_send_sequence()
146 static int lms501kf03_ldi_init(struct lms501kf03 *lcd)  in lms501kf03_ldi_init()  argument
180 		ret = lms501kf03_panel_send_sequence(lcd, init_seq[i],  in lms501kf03_ldi_init()
195 static int lms501kf03_ldi_enable(struct lms501kf03 *lcd)  in lms501kf03_ldi_enable()  argument
197 	return lms501kf03_panel_send_sequence(lcd, seq_display_on,  in lms501kf03_ldi_enable()
201 static int lms501kf03_ldi_disable(struct lms501kf03 *lcd)  in lms501kf03_ldi_disable()  argument
203 	return lms501kf03_panel_send_sequence(lcd, seq_display_off,  in lms501kf03_ldi_disable()
212 static int lms501kf03_power_on(struct lms501kf03 *lcd)  in lms501kf03_power_on()  argument
217 	pd = lcd->lcd_pd;  in lms501kf03_power_on()
220 		dev_err(lcd->dev, "power_on is NULL.\n");  in lms501kf03_power_on()
224 	pd->power_on(lcd->ld, 1);  in lms501kf03_power_on()
228 		dev_err(lcd->dev, "reset is NULL.\n");  in lms501kf03_power_on()
232 	pd->reset(lcd->ld);  in lms501kf03_power_on()
235 	ret = lms501kf03_ldi_init(lcd);  in lms501kf03_power_on()
237 		dev_err(lcd->dev, "failed to initialize ldi.\n");  in lms501kf03_power_on()
241 	ret = lms501kf03_ldi_enable(lcd);  in lms501kf03_power_on()
243 		dev_err(lcd->dev, "failed to enable ldi.\n");  in lms501kf03_power_on()
250 static int lms501kf03_power_off(struct lms501kf03 *lcd)  in lms501kf03_power_off()  argument
255 	pd = lcd->lcd_pd;  in lms501kf03_power_off()
257 	ret = lms501kf03_ldi_disable(lcd);  in lms501kf03_power_off()
259 		dev_err(lcd->dev, "lcd setting failed.\n");  in lms501kf03_power_off()
265 	pd->power_on(lcd->ld, 0);  in lms501kf03_power_off()
270 static int lms501kf03_power(struct lms501kf03 *lcd, int power)  in lms501kf03_power()  argument
275 		!lms501kf03_power_is_on(lcd->power))  in lms501kf03_power()
276 		ret = lms501kf03_power_on(lcd);  in lms501kf03_power()
278 		lms501kf03_power_is_on(lcd->power))  in lms501kf03_power()
279 		ret = lms501kf03_power_off(lcd);  in lms501kf03_power()
282 		lcd->power = power;  in lms501kf03_power()
289 	struct lms501kf03 *lcd = lcd_get_data(ld);  in lms501kf03_get_power()  local
291 	return lcd->power;  in lms501kf03_get_power()
296 	struct lms501kf03 *lcd = lcd_get_data(ld);  in lms501kf03_set_power()  local
300 		dev_err(lcd->dev, "power value should be 0, 1 or 4.\n");  in lms501kf03_set_power()
304 	return lms501kf03_power(lcd, power);  in lms501kf03_set_power()
314 	struct lms501kf03 *lcd = NULL;  in lms501kf03_probe()  local
318 	lcd = devm_kzalloc(&spi->dev, sizeof(struct lms501kf03), GFP_KERNEL);  in lms501kf03_probe()
319 	if (!lcd)  in lms501kf03_probe()
322 	/* lms501kf03 lcd panel uses 3-wire 9-bit SPI Mode. */  in lms501kf03_probe()
331 	lcd->spi = spi;  in lms501kf03_probe()
332 	lcd->dev = &spi->dev;  in lms501kf03_probe()
334 	lcd->lcd_pd = dev_get_platdata(&spi->dev);  in lms501kf03_probe()
335 	if (!lcd->lcd_pd) {  in lms501kf03_probe()
340 	ld = devm_lcd_device_register(&spi->dev, "lms501kf03", &spi->dev, lcd,  in lms501kf03_probe()
345 	lcd->ld = ld;  in lms501kf03_probe()
347 	if (!lcd->lcd_pd->lcd_enabled) {  in lms501kf03_probe()
349 		 * if lcd panel was off from bootloader then  in lms501kf03_probe()
350 		 * current lcd status is powerdown and then  in lms501kf03_probe()
351 		 * it enables lcd panel.  in lms501kf03_probe()
353 		lcd->power = FB_BLANK_POWERDOWN;  in lms501kf03_probe()
355 		lms501kf03_power(lcd, FB_BLANK_UNBLANK);  in lms501kf03_probe()
357 		lcd->power = FB_BLANK_UNBLANK;  in lms501kf03_probe()
360 	spi_set_drvdata(spi, lcd);  in lms501kf03_probe()
369 	struct lms501kf03 *lcd = spi_get_drvdata(spi);  in lms501kf03_remove()  local
371 	lms501kf03_power(lcd, FB_BLANK_POWERDOWN);  in lms501kf03_remove()
377 	struct lms501kf03 *lcd = dev_get_drvdata(dev);  in lms501kf03_suspend()  local
379 	dev_dbg(dev, "lcd->power = %d\n", lcd->power);  in lms501kf03_suspend()
382 	 * when lcd panel is suspend, lcd panel becomes off  in lms501kf03_suspend()
385 	return lms501kf03_power(lcd, FB_BLANK_POWERDOWN);  in lms501kf03_suspend()
390 	struct lms501kf03 *lcd = dev_get_drvdata(dev);  in lms501kf03_resume()  local
392 	lcd->power = FB_BLANK_POWERDOWN;  in lms501kf03_resume()
394 	return lms501kf03_power(lcd, FB_BLANK_UNBLANK);  in lms501kf03_resume()
403 	struct lms501kf03 *lcd = spi_get_drvdata(spi);  in lms501kf03_shutdown()  local
405 	lms501kf03_power(lcd, FB_BLANK_POWERDOWN);  in lms501kf03_shutdown()
421 MODULE_DESCRIPTION("lms501kf03 LCD Driver");