mirror of
https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
231 lines
3.6 KiB
C
231 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* LCD: LG4573, TFT 4.3", 480x800, RGB24
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* LCD initialization via SPI
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*
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*/
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#include <common.h>
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#include <errno.h>
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#include <spi.h>
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#define PWR_ON_DELAY_MSECS 120
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static int lb043wv_spi_write_u16(struct spi_slave *spi, u16 val)
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{
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unsigned long flags = SPI_XFER_BEGIN;
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unsigned short buf16 = htons(val);
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int ret = 0;
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flags |= SPI_XFER_END;
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ret = spi_xfer(spi, 16, &buf16, NULL, flags);
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if (ret)
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debug("%s: Failed to send: %d\n", __func__, ret);
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return ret;
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}
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static void lb043wv_spi_write_u16_array(struct spi_slave *spi, u16 *buff,
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int size)
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{
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int i;
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for (i = 0; i < size; i++)
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lb043wv_spi_write_u16(spi, buff[i]);
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}
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static void lb043wv_display_mode_settings(struct spi_slave *spi)
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{
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static u16 display_mode_settings[] = {
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0x703A,
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0x7270,
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0x70B1,
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0x7208,
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0x723B,
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0x720F,
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0x70B2,
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0x7200,
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0x72C8,
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0x70B3,
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0x7200,
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0x70B4,
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0x7200,
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0x70B5,
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0x7242,
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0x7210,
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0x7210,
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0x7200,
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0x7220,
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0x70B6,
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0x720B,
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0x720F,
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0x723C,
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0x7213,
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0x7213,
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0x72E8,
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0x70B7,
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0x7246,
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0x7206,
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0x720C,
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0x7200,
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0x7200,
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};
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debug("transfer display mode settings\n");
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lb043wv_spi_write_u16_array(spi, display_mode_settings,
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ARRAY_SIZE(display_mode_settings));
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}
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static void lb043wv_power_settings(struct spi_slave *spi)
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{
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static u16 power_settings[] = {
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0x70C0,
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0x7201,
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0x7211,
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0x70C3,
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0x7207,
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0x7203,
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0x7204,
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0x7204,
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0x7204,
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0x70C4,
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0x7212,
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0x7224,
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0x7218,
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0x7218,
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0x7202,
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0x7249,
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0x70C5,
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0x726F,
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0x70C6,
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0x7241,
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0x7263,
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};
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debug("transfer power settings\n");
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lb043wv_spi_write_u16_array(spi, power_settings,
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ARRAY_SIZE(power_settings));
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}
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static void lb043wv_gamma_settings(struct spi_slave *spi)
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{
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static u16 gamma_settings[] = {
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0x70D0,
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0x7203,
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0x7207,
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0x7273,
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0x7235,
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0x7200,
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0x7201,
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0x7220,
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0x7200,
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0x7203,
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0x70D1,
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0x7203,
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0x7207,
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0x7273,
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0x7235,
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0x7200,
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0x7201,
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0x7220,
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0x7200,
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0x7203,
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0x70D2,
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0x7203,
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0x7207,
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0x7273,
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0x7235,
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0x7200,
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0x7201,
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0x7220,
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0x7200,
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0x7203,
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0x70D3,
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0x7203,
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0x7207,
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0x7273,
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0x7235,
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0x7200,
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0x7201,
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0x7220,
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0x7200,
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0x7203,
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0x70D4,
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0x7203,
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0x7207,
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0x7273,
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0x7235,
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0x7200,
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0x7201,
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0x7220,
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0x7200,
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0x7203,
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0x70D5,
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0x7203,
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0x7207,
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0x7273,
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0x7235,
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0x7200,
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0x7201,
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0x7220,
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0x7200,
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0x7203,
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};
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debug("transfer gamma settings\n");
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lb043wv_spi_write_u16_array(spi, gamma_settings,
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ARRAY_SIZE(gamma_settings));
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}
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static void lb043wv_display_on(struct spi_slave *spi)
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{
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static u16 sleep_out = 0x7011;
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static u16 display_on = 0x7029;
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lb043wv_spi_write_u16(spi, sleep_out);
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mdelay(PWR_ON_DELAY_MSECS);
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lb043wv_spi_write_u16(spi, display_on);
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}
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int lg4573_spi_startup(unsigned int bus, unsigned int cs,
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unsigned int max_hz, unsigned int spi_mode)
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{
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struct spi_slave *spi;
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int ret;
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spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
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if (!spi) {
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debug("%s: Failed to set up slave\n", __func__);
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return -1;
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}
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ret = spi_claim_bus(spi);
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if (ret) {
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debug("%s: Failed to claim SPI bus: %d\n", __func__, ret);
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goto err_claim_bus;
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}
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lb043wv_display_mode_settings(spi);
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lb043wv_power_settings(spi);
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lb043wv_gamma_settings(spi);
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lb043wv_display_on(spi);
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return 0;
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err_claim_bus:
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spi_free_slave(spi);
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return -1;
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}
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static int do_lgset(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[])
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{
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lg4573_spi_startup(CONFIG_LG4573_BUS, CONFIG_LG4573_CS, 10000000,
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SPI_MODE_0);
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return 0;
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}
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U_BOOT_CMD(
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lgset, 2, 1, do_lgset,
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"set lgdisplay",
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""
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);
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