1 // SPDX-License-Identifier: GPL-2.0-only
29 	struct ili9320_spi *spi = &ili->access.spi;  in ili9320_write_spi()
30 	unsigned char *addr = spi->buffer_addr;  in ili9320_write_spi()
31 	unsigned char *data = spi->buffer_data;  in ili9320_write_spi()
33 	/* spi message consits of:  in ili9320_write_spi()
37 	addr[0] = spi->id | ILI9320_SPI_INDEX | ILI9320_SPI_WRITE;  in ili9320_write_spi()
43 	data[0] = spi->id | ILI9320_SPI_DATA  | ILI9320_SPI_WRITE;  in ili9320_write_spi()
47 	return spi_sync(spi->dev, &spi->message);  in ili9320_write_spi()
52 	dev_dbg(ili->dev, "write: reg=%02x, val=%04x\n", reg, value);  in ili9320_write()
53 	return ili->write(ili, reg, value);  in ili9320_write()
61 	int index;  in ili9320_write_regs()  local
64 	for (index = 0; index < nr_values; index++, values++) {  in ili9320_write_regs()
65 		ret = ili9320_write(ili, values->address, values->value);  in ili9320_write_regs()
76 	struct ili9320_platdata *cfg = lcd->platdata;  in ili9320_reset()
78 	cfg->reset(1);  in ili9320_reset()
81 	cfg->reset(0);  in ili9320_reset()
84 	cfg->reset(1);  in ili9320_reset()
94 	ret = lcd->client->init(lcd, lcd->platdata);  in ili9320_init_chip()
96 		dev_err(lcd->dev, "failed to initialise display\n");  in ili9320_init_chip()
100 	lcd->initialised = 1;  in ili9320_init_chip()
106 	if (!lcd->initialised)  in ili9320_power_on()
109 	lcd->display1 |= (ILI9320_DISPLAY1_D(3) | ILI9320_DISPLAY1_BASEE);  in ili9320_power_on()
110 	ili9320_write(lcd, ILI9320_DISPLAY1, lcd->display1);  in ili9320_power_on()
117 	lcd->display1 &= ~(ILI9320_DISPLAY1_D(3) | ILI9320_DISPLAY1_BASEE);  in ili9320_power_off()
118 	ili9320_write(lcd, ILI9320_DISPLAY1, lcd->display1);  in ili9320_power_off()
125 static int ili9320_power(struct ili9320 *lcd, int power)  in ili9320_power()  argument
129 	dev_dbg(lcd->dev, "power %d => %d\n", lcd->power, power);  in ili9320_power()
131 	if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))  in ili9320_power()
133 	else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))  in ili9320_power()
137 		lcd->power = power;  in ili9320_power()
139 		dev_warn(lcd->dev, "failed to set power mode %d\n", power);  in ili9320_power()
149 static int ili9320_set_power(struct lcd_device *ld, int power)  in ili9320_set_power()  argument
153 	return ili9320_power(lcd, power);  in ili9320_set_power()
160 	return lcd->power;  in ili9320_get_power()
171 	struct ili9320_spi *spi = &ili->access.spi;  in ili9320_setup_spi()
173 	ili->write = ili9320_write_spi;  in ili9320_setup_spi()
174 	spi->dev = dev;  in ili9320_setup_spi()
176 	/* fill the two messages we are going to use to send the data  in ili9320_setup_spi()
178 	 * says they should be done as two distinct cycles of the SPI CS line.  in ili9320_setup_spi()
181 	spi->xfer[0].tx_buf = spi->buffer_addr;  in ili9320_setup_spi()
182 	spi->xfer[1].tx_buf = spi->buffer_data;  in ili9320_setup_spi()
183 	spi->xfer[0].len = 3;  in ili9320_setup_spi()
184 	spi->xfer[1].len = 3;  in ili9320_setup_spi()
185 	spi->xfer[0].bits_per_word = 8;  in ili9320_setup_spi()
186 	spi->xfer[1].bits_per_word = 8;  in ili9320_setup_spi()
187 	spi->xfer[0].cs_change = 1;  in ili9320_setup_spi()
189 	spi_message_init(&spi->message);  in ili9320_setup_spi()
190 	spi_message_add_tail(&spi->xfer[0], &spi->message);  in ili9320_setup_spi()
191 	spi_message_add_tail(&spi->xfer[1], &spi->message);  in ili9320_setup_spi()
197 	struct ili9320_platdata *cfg = dev_get_platdata(&spi->dev);  in ili9320_probe_spi()
198 	struct device *dev = &spi->dev;  in ili9320_probe_spi()
207 		return -EINVAL;  in ili9320_probe_spi()
210 	if (cfg->hsize <= 0 || cfg->vsize <= 0 || cfg->reset == NULL) {  in ili9320_probe_spi()
212 		return -EINVAL;  in ili9320_probe_spi()
217 	ili = devm_kzalloc(&spi->dev, sizeof(struct ili9320), GFP_KERNEL);  in ili9320_probe_spi()
219 		return -ENOMEM;  in ili9320_probe_spi()
221 	ili->access.spi.id = ILI9320_SPI_IDCODE | ILI9320_SPI_ID(1);  in ili9320_probe_spi()
223 	ili->dev = dev;  in ili9320_probe_spi()
224 	ili->client = client;  in ili9320_probe_spi()
225 	ili->power = LCD_POWER_OFF;  in ili9320_probe_spi()
226 	ili->platdata = cfg;  in ili9320_probe_spi()
232 	lcd = devm_lcd_device_register(&spi->dev, "ili9320", dev, ili,  in ili9320_probe_spi()
239 	ili->lcd = lcd;  in ili9320_probe_spi()
241 	dev_info(dev, "initialising %s\n", client->name);  in ili9320_probe_spi()
245 		dev_err(dev, "failed to set lcd power state\n");  in ili9320_probe_spi()
266 	if (lcd->platdata->suspend == ILI9320_SUSPEND_DEEP) {  in ili9320_suspend()
267 		ili9320_write(lcd, ILI9320_POWER1, lcd->power1 |  in ili9320_suspend()
270 		lcd->initialised = 0;  in ili9320_suspend()
279 	dev_info(lcd->dev, "resuming from power state %d\n", lcd->power);  in ili9320_resume()
281 	if (lcd->platdata->suspend == ILI9320_SUSPEND_DEEP)  in ili9320_resume()
289 /* Power down all displays on reboot, poweroff or halt */
296 MODULE_AUTHOR("Ben Dooks <ben-linux@fluff.org>");