1 // SPDX-License-Identifier: GPL-2.0+
18 static void lcd_panel_spi_write(int cs, int clk, int mosi,  in lcd_panel_spi_write()  argument
23 	gpio_direction_output(cs, 0);  in lcd_panel_spi_write()
26 		offset = (bits - 1) - i;  in lcd_panel_spi_write()
28 		udelay(2);  in lcd_panel_spi_write()
30 		udelay(2);  in lcd_panel_spi_write()
32 	gpio_direction_output(cs, 1);  in lcd_panel_spi_write()
33 	udelay(2);  in lcd_panel_spi_write()
44 		0x3ca4,		/* enter test mode(2) */  in hitachi_tx18d42vm_init()
46 		0x4041,		/* adopt 2 line / 1 dot */  in hitachi_tx18d42vm_init()
48 	int i, cs, clk, mosi, ret = 0;  in hitachi_tx18d42vm_init()  local
50 	cs = name_to_gpio(CONFIG_VIDEO_LCD_SPI_CS);  in hitachi_tx18d42vm_init()
54 	if (cs == -1 || clk == -1 || mosi == 1) {  in hitachi_tx18d42vm_init()
56 		return -EINVAL;  in hitachi_tx18d42vm_init()
59 	if (gpio_request(cs, "tx18d42vm-spi-cs") != 0 ||  in hitachi_tx18d42vm_init()
60 	    gpio_request(clk, "tx18d42vm-spi-clk") != 0 ||  in hitachi_tx18d42vm_init()
61 	    gpio_request(mosi, "tx18d42vm-spi-mosi") != 0) {  in hitachi_tx18d42vm_init()
63 		ret = -EBUSY;  in hitachi_tx18d42vm_init()
68 		lcd_panel_spi_write(cs, clk, mosi, init_data[i], 16);  in hitachi_tx18d42vm_init()
72 	lcd_panel_spi_write(cs, clk, mosi, 0x00ad, 16); /* display on */  in hitachi_tx18d42vm_init()
77 	gpio_free(cs);  in hitachi_tx18d42vm_init()