u-boot/board/atmel/common/board.c
Eugen Hristev 61b4dbb0d0 board: at91sam9x5: add environment var for cpu type
When booting and CPU is detected from cpuid, we also need an environment
variable that will be used in boot commands to load the proper devicetree.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
2018-10-22 09:18:49 -04:00

75 lines
1.3 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2017 Microchip
* Wenyou Yang <wenyou.yang@microchip.com>
*/
#include <common.h>
#include <w1.h>
#include <w1-eeprom.h>
#include <dm/device-internal.h>
#define AT91_PDA_EEPROM_ID_OFFSET 15
#define AT91_PDA_EEPROM_ID_LENGTH 5
#define AT91_PDA_EEPROM_DEFAULT_BUS 0
char *get_cpu_name(void);
void dummy(void)
{
}
#if defined CONFIG_W1
void at91_pda_detect(void)
{
struct udevice *bus, *dev;
u8 buf[AT91_PDA_EEPROM_ID_LENGTH + 1] = {0};
int ret;
int pda = 0;
ret = w1_get_bus(AT91_PDA_EEPROM_DEFAULT_BUS, &bus);
if (ret)
return;
for (device_find_first_child(bus, &dev);
dev;
device_find_next_child(&dev)) {
ret = device_probe(dev);
if (ret) {
continue;
} else {
ret = w1_eeprom_read_buf(dev, AT91_PDA_EEPROM_ID_OFFSET,
(u8 *)buf, AT91_PDA_EEPROM_ID_LENGTH);
if (ret)
return;
break;
}
}
pda = simple_strtoul((const char *)buf, NULL, 10);
switch (pda) {
case 7000:
if (buf[4] == 'B')
printf("PDA TM7000B detected\n");
else
printf("PDA TM7000 detected\n");
break;
case 4300:
printf("PDA TM4300 detected\n");
break;
case 5000:
printf("PDA TM5000 detected\n");
break;
}
env_set("pda", (const char *)buf);
}
#else
void at91_pda_detect(void)
{
}
#endif
void at91_prepare_cpu_var(void)
{
env_set("cpu", get_cpu_name());
}