u-boot/board/freescale/ls1021aqds/dcu.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
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>
2018-05-07 09:34:12 -04:00

91 lines
1.8 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2014 Freescale Semiconductor, Inc.
*
* FSL DCU Framebuffer driver
*/
#include <asm/io.h>
#include <common.h>
#include <fsl_dcu_fb.h>
#include <i2c.h>
#include "div64.h"
#include "../common/diu_ch7301.h"
#include "ls1021aqds_qixis.h"
DECLARE_GLOBAL_DATA_PTR;
static int select_i2c_ch_pca9547(u8 ch)
{
int ret;
ret = i2c_write(I2C_MUX_PCA_ADDR_PRI, 0, 1, &ch, 1);
if (ret) {
puts("PCA: failed to select proper channel\n");
return ret;
}
return 0;
}
unsigned int dcu_set_pixel_clock(unsigned int pixclock)
{
unsigned long long div;
div = (unsigned long long)(gd->bus_clk / 1000);
div *= (unsigned long long)pixclock;
do_div(div, 1000000000);
return div;
}
int platform_dcu_init(unsigned int xres, unsigned int yres,
const char *port,
struct fb_videomode *dcu_fb_videomode)
{
const char *name;
unsigned int pixel_format;
int ret;
u8 ch;
/* Mux I2C3+I2C4 as HSYNC+VSYNC */
ret = i2c_read(CONFIG_SYS_I2C_QIXIS_ADDR, QIXIS_DCU_BRDCFG5,
1, &ch, 1);
if (ret) {
printf("Error: failed to read I2C @%02x\n",
CONFIG_SYS_I2C_QIXIS_ADDR);
return ret;
}
ch &= 0x1F;
ch |= 0xA0;
ret = i2c_write(CONFIG_SYS_I2C_QIXIS_ADDR, QIXIS_DCU_BRDCFG5,
1, &ch, 1);
if (ret) {
printf("Error: failed to write I2C @%02x\n",
CONFIG_SYS_I2C_QIXIS_ADDR);
return ret;
}
if (strncmp(port, "hdmi", 4) == 0) {
unsigned long pixval;
name = "HDMI";
pixval = 1000000000 / dcu_fb_videomode->pixclock;
pixval *= 1000;
i2c_set_bus_num(CONFIG_SYS_I2C_DVI_BUS_NUM);
select_i2c_ch_pca9547(I2C_MUX_CH_CH7301);
diu_set_dvi_encoder(pixval);
select_i2c_ch_pca9547(I2C_MUX_CH_DEFAULT);
} else {
return 0;
}
printf("DCU: Switching to %s monitor @ %ux%u\n", name, xres, yres);
pixel_format = 32;
fsl_dcu_init(xres, yres, pixel_format);
return 0;
}