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imx8: cpu: add function for reading FEC MAC from fuse

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FEC driver requires imx_get_mac_from_fuse(). Add it in preparation
for ENETx support.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Anatolij Gustschin 2018-10-18 14:28:23 +02:00 committed by Stefano Babic
parent 1ef20a3d81
commit 70b4b49b91
1 changed files with 38 additions and 0 deletions
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38
arch/arm/mach-imx/imx8/cpu.c
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@ -543,3 +543,41 @@ u64 get_page_table_size(void)
return size;
}
#endif
#define FUSE_MAC0_WORD0 708
#define FUSE_MAC0_WORD1 709
#define FUSE_MAC1_WORD0 710
#define FUSE_MAC1_WORD1 711
void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
{
u32 word[2], val[2] = {};
int i, ret;
if (dev_id == 0) {
word[0] = FUSE_MAC0_WORD0;
word[1] = FUSE_MAC0_WORD1;
} else {
word[0] = FUSE_MAC1_WORD0;
word[1] = FUSE_MAC1_WORD1;
}
for (i = 0; i < 2; i++) {
ret = sc_misc_otp_fuse_read(-1, word[i], &val[i]);
if (ret < 0)
goto err;
}
mac[0] = val[0];
mac[1] = val[0] >> 8;
mac[2] = val[0] >> 16;
mac[3] = val[0] >> 24;
mac[4] = val[1];
mac[5] = val[1] >> 8;
debug("%s: MAC%d: %02x.%02x.%02x.%02x.%02x.%02x\n",
__func__, dev_id, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
return;
err:
printf("%s: fuse %d, err: %d\n", __func__, word[i], ret);
}