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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>
63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2014
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* Dirk Eibach, Guntermann & Drunck GmbH, dirk.eibach@gdsys.cc
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*/
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/* Chrontel CH7301C DVI Transmitter */
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#include <common.h>
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#include <asm/io.h>
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#include <errno.h>
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#include <i2c.h>
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#define CH7301_I2C_ADDR 0x75
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enum {
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CH7301_CM = 0x1c, /* Clock Mode Register */
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CH7301_IC = 0x1d, /* Input Clock Register */
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CH7301_GPIO = 0x1e, /* GPIO Control Register */
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CH7301_IDF = 0x1f, /* Input Data Format Register */
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CH7301_CD = 0x20, /* Connection Detect Register */
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CH7301_DC = 0x21, /* DAC Control Register */
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CH7301_HPD = 0x23, /* Hot Plug Detection Register */
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CH7301_TCTL = 0x31, /* DVI Control Input Register */
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CH7301_TPCP = 0x33, /* DVI PLL Charge Pump Ctrl Register */
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CH7301_TPD = 0x34, /* DVI PLL Divide Register */
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CH7301_TPVT = 0x35, /* DVI PLL Supply Control Register */
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CH7301_TPF = 0x36, /* DVI PLL Filter Register */
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CH7301_TCT = 0x37, /* DVI Clock Test Register */
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CH7301_TSTP = 0x48, /* Test Pattern Register */
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CH7301_PM = 0x49, /* Power Management register */
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CH7301_VID = 0x4a, /* Version ID Register */
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CH7301_DID = 0x4b, /* Device ID Register */
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CH7301_DSP = 0x56, /* DVI Sync polarity Register */
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};
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int ch7301_i2c[] = CONFIG_SYS_CH7301_I2C;
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int ch7301_probe(unsigned screen, bool power)
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{
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u8 value;
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i2c_set_bus_num(ch7301_i2c[screen]);
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if (i2c_probe(CH7301_I2C_ADDR))
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return -1;
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value = i2c_reg_read(CH7301_I2C_ADDR, CH7301_DID);
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if (value != 0x17)
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return -1;
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if (power) {
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i2c_reg_write(CH7301_I2C_ADDR, CH7301_TPCP, 0x08);
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i2c_reg_write(CH7301_I2C_ADDR, CH7301_TPD, 0x16);
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i2c_reg_write(CH7301_I2C_ADDR, CH7301_TPF, 0x60);
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i2c_reg_write(CH7301_I2C_ADDR, CH7301_DC, 0x09);
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i2c_reg_write(CH7301_I2C_ADDR, CH7301_PM, 0xc0);
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} else {
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i2c_reg_write(CH7301_I2C_ADDR, CH7301_DC, 0x00);
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i2c_reg_write(CH7301_I2C_ADDR, CH7301_PM, 0x01);
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}
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return 0;
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}
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