3  * Power control for Samsung LTV350QV Quarter VGA LCD Panel
11 #include <linux/lcd.h>
36 static int ltv350qv_write_reg(struct ltv350qv *lcd, u8 reg, u16 val)  in ltv350qv_write_reg()  argument
50 	lcd->buffer[0] = LTV_OPC_INDEX;  in ltv350qv_write_reg()
51 	lcd->buffer[1] = 0x00;  in ltv350qv_write_reg()
52 	lcd->buffer[2] = reg & 0x7f;  in ltv350qv_write_reg()
53 	index_xfer.tx_buf = lcd->buffer;  in ltv350qv_write_reg()
57 	lcd->buffer[4] = LTV_OPC_DATA;  in ltv350qv_write_reg()
58 	lcd->buffer[5] = val >> 8;  in ltv350qv_write_reg()
59 	lcd->buffer[6] = val;  in ltv350qv_write_reg()
60 	value_xfer.tx_buf = lcd->buffer + 4;  in ltv350qv_write_reg()
63 	return spi_sync(lcd->spi, &msg);  in ltv350qv_write_reg()
67 static int ltv350qv_power_on(struct ltv350qv *lcd)  in ltv350qv_power_on()  argument
72 	if (ltv350qv_write_reg(lcd, LTV_PWRCTL1, 0x0000))  in ltv350qv_power_on()
77 	if (ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE))  in ltv350qv_power_on()
79 	if (ltv350qv_write_reg(lcd, LTV_PWRCTL2, LTV_VCOML_ENABLE))  in ltv350qv_power_on()
83 	if (ltv350qv_write_reg(lcd, LTV_PWRCTL1,  in ltv350qv_power_on()
91 	ret = ltv350qv_write_reg(lcd, LTV_IFCTL,  in ltv350qv_power_on()
93 	ret |= ltv350qv_write_reg(lcd, LTV_DATACTL,  in ltv350qv_power_on()
96 	ret |= ltv350qv_write_reg(lcd, LTV_ENTRY_MODE,  in ltv350qv_power_on()
102 	ret |= ltv350qv_write_reg(lcd, LTV_GATECTL1, LTV_CLW(3));  in ltv350qv_power_on()
103 	ret |= ltv350qv_write_reg(lcd, LTV_GATECTL2,  in ltv350qv_power_on()
105 	ret |= ltv350qv_write_reg(lcd, LTV_VBP, 0x000a);  in ltv350qv_power_on()
106 	ret |= ltv350qv_write_reg(lcd, LTV_HBP, 0x0021);  in ltv350qv_power_on()
107 	ret |= ltv350qv_write_reg(lcd, LTV_SOTCTL, LTV_SDT(3) | LTV_EQ(0));  in ltv350qv_power_on()
108 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(0), 0x0103);  in ltv350qv_power_on()
109 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(1), 0x0301);  in ltv350qv_power_on()
110 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(2), 0x1f0f);  in ltv350qv_power_on()
111 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(3), 0x1f0f);  in ltv350qv_power_on()
112 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(4), 0x0707);  in ltv350qv_power_on()
113 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(5), 0x0307);  in ltv350qv_power_on()
114 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(6), 0x0707);  in ltv350qv_power_on()
115 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(7), 0x0000);  in ltv350qv_power_on()
116 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(8), 0x0004);  in ltv350qv_power_on()
117 	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(9), 0x0000);  in ltv350qv_power_on()
125 	ret = ltv350qv_write_reg(lcd, LTV_PWRCTL1,  in ltv350qv_power_on()
129 	ret |= ltv350qv_write_reg(lcd, LTV_GATECTL2,  in ltv350qv_power_on()
143 	ltv350qv_write_reg(lcd, LTV_PWRCTL1,  in ltv350qv_power_on()
146 	ltv350qv_write_reg(lcd, LTV_GATECTL2,  in ltv350qv_power_on()
151 	ltv350qv_write_reg(lcd, LTV_PWRCTL2, 0x0000);  in ltv350qv_power_on()
154 	ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE);  in ltv350qv_power_on()
158 static int ltv350qv_power_off(struct ltv350qv *lcd)  in ltv350qv_power_off()  argument
163 	ret = ltv350qv_write_reg(lcd, LTV_PWRCTL1,  in ltv350qv_power_off()
167 	ret |= ltv350qv_write_reg(lcd, LTV_GATECTL2,  in ltv350qv_power_off()
171 	ret |= ltv350qv_write_reg(lcd, LTV_PWRCTL2, 0x0000);  in ltv350qv_power_off()
177 	ret |= ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE);  in ltv350qv_power_off()
191 static int ltv350qv_power(struct ltv350qv *lcd, int power)  in ltv350qv_power()  argument
195 	if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))  in ltv350qv_power()
196 		ret = ltv350qv_power_on(lcd);  in ltv350qv_power()
197 	else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))  in ltv350qv_power()
198 		ret = ltv350qv_power_off(lcd);  in ltv350qv_power()
201 		lcd->power = power;  in ltv350qv_power()
208 	struct ltv350qv *lcd = lcd_get_data(ld);  in ltv350qv_set_power()  local
210 	return ltv350qv_power(lcd, power);  in ltv350qv_set_power()
215 	struct ltv350qv *lcd = lcd_get_data(ld);  in ltv350qv_get_power()  local
217 	return lcd->power;  in ltv350qv_get_power()
227 	struct ltv350qv *lcd;  in ltv350qv_probe()  local
231 	lcd = devm_kzalloc(&spi->dev, sizeof(struct ltv350qv), GFP_KERNEL);  in ltv350qv_probe()
232 	if (!lcd)  in ltv350qv_probe()
235 	lcd->spi = spi;  in ltv350qv_probe()
236 	lcd->power = FB_BLANK_POWERDOWN;  in ltv350qv_probe()
237 	lcd->buffer = devm_kzalloc(&spi->dev, 8, GFP_KERNEL);  in ltv350qv_probe()
238 	if (!lcd->buffer)  in ltv350qv_probe()
241 	ld = devm_lcd_device_register(&spi->dev, "ltv350qv", &spi->dev, lcd,  in ltv350qv_probe()
246 	lcd->ld = ld;  in ltv350qv_probe()
248 	ret = ltv350qv_power(lcd, FB_BLANK_UNBLANK);  in ltv350qv_probe()
252 	spi_set_drvdata(spi, lcd);  in ltv350qv_probe()
259 	struct ltv350qv *lcd = spi_get_drvdata(spi);  in ltv350qv_remove()  local
261 	ltv350qv_power(lcd, FB_BLANK_POWERDOWN);  in ltv350qv_remove()
267 	struct ltv350qv *lcd = dev_get_drvdata(dev);  in ltv350qv_suspend()  local
269 	return ltv350qv_power(lcd, FB_BLANK_POWERDOWN);  in ltv350qv_suspend()
274 	struct ltv350qv *lcd = dev_get_drvdata(dev);  in ltv350qv_resume()  local
276 	return ltv350qv_power(lcd, FB_BLANK_UNBLANK);  in ltv350qv_resume()
285 	struct ltv350qv *lcd = spi_get_drvdata(spi);  in ltv350qv_shutdown()  local
287 	ltv350qv_power(lcd, FB_BLANK_POWERDOWN);  in ltv350qv_shutdown()
304 MODULE_DESCRIPTION("Samsung LTV350QV LCD Driver");