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61b4dbb0d0
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>
76 lines
1.3 KiB
C
76 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017 Microchip
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* Wenyou Yang <wenyou.yang@microchip.com>
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*/
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#include <common.h>
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#include <w1.h>
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#include <w1-eeprom.h>
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#include <dm/device-internal.h>
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#define AT91_PDA_EEPROM_ID_OFFSET 15
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#define AT91_PDA_EEPROM_ID_LENGTH 5
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#define AT91_PDA_EEPROM_DEFAULT_BUS 0
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char *get_cpu_name(void);
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void dummy(void)
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{
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}
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#if defined CONFIG_W1
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void at91_pda_detect(void)
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{
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struct udevice *bus, *dev;
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u8 buf[AT91_PDA_EEPROM_ID_LENGTH + 1] = {0};
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int ret;
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int pda = 0;
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ret = w1_get_bus(AT91_PDA_EEPROM_DEFAULT_BUS, &bus);
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if (ret)
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return;
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for (device_find_first_child(bus, &dev);
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dev;
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device_find_next_child(&dev)) {
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ret = device_probe(dev);
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if (ret) {
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continue;
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} else {
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ret = w1_eeprom_read_buf(dev, AT91_PDA_EEPROM_ID_OFFSET,
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(u8 *)buf, AT91_PDA_EEPROM_ID_LENGTH);
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if (ret)
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return;
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break;
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}
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}
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pda = simple_strtoul((const char *)buf, NULL, 10);
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switch (pda) {
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case 7000:
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if (buf[4] == 'B')
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printf("PDA TM7000B detected\n");
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else
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printf("PDA TM7000 detected\n");
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break;
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case 4300:
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printf("PDA TM4300 detected\n");
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break;
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case 5000:
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printf("PDA TM5000 detected\n");
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break;
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}
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env_set("pda", (const char *)buf);
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}
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#else
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void at91_pda_detect(void)
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{
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}
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#endif
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void at91_prepare_cpu_var(void)
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{
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env_set("cpu", get_cpu_name());
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}
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