u-boot/post/drivers/i2c.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

96 lines
2.1 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*/
/*
* I2C test
*
* For verifying the I2C bus, a full I2C bus scanning is performed.
*
* #ifdef CONFIG_SYS_POST_I2C_ADDRS
* The test is considered as passed if all the devices and only the devices
* in the list are found.
* #ifdef CONFIG_SYS_POST_I2C_IGNORES
* Ignore devices listed in CONFIG_SYS_POST_I2C_IGNORES. These devices
* are optional or not vital to board functionality.
* #endif
* #else [ ! CONFIG_SYS_POST_I2C_ADDRS ]
* The test is considered as passed if any I2C device is found.
* #endif
*/
#include <common.h>
#include <post.h>
#include <i2c.h>
#if CONFIG_POST & CONFIG_SYS_POST_I2C
static int i2c_ignore_device(unsigned int chip)
{
#ifdef CONFIG_SYS_POST_I2C_IGNORES
const unsigned char i2c_ignore_list[] = CONFIG_SYS_POST_I2C_IGNORES;
int i;
for (i = 0; i < sizeof(i2c_ignore_list); i++)
if (i2c_ignore_list[i] == chip)
return 1;
#endif
return 0;
}
int i2c_post_test (int flags)
{
unsigned int i;
#ifndef CONFIG_SYS_POST_I2C_ADDRS
/* Start at address 1, address 0 is the general call address */
for (i = 1; i < 128; i++) {
if (i2c_ignore_device(i))
continue;
if (i2c_probe (i) == 0)
return 0;
}
/* No devices found */
return -1;
#else
unsigned int ret = 0;
int j;
unsigned char i2c_addr_list[] = CONFIG_SYS_POST_I2C_ADDRS;
/* Start at address 1, address 0 is the general call address */
for (i = 1; i < 128; i++) {
if (i2c_ignore_device(i))
continue;
if (i2c_probe(i) != 0)
continue;
for (j = 0; j < sizeof(i2c_addr_list); ++j) {
if (i == i2c_addr_list[j]) {
i2c_addr_list[j] = 0xff;
break;
}
}
if (j == sizeof(i2c_addr_list)) {
ret = -1;
post_log("I2C: addr %02x not expected\n", i);
}
}
for (i = 0; i < sizeof(i2c_addr_list); ++i) {
if (i2c_addr_list[i] == 0xff)
continue;
if (i2c_ignore_device(i2c_addr_list[i]))
continue;
post_log("I2C: addr %02x did not respond\n", i2c_addr_list[i]);
ret = -1;
}
return ret;
#endif
}
#endif /* CONFIG_POST & CONFIG_SYS_POST_I2C */