[U-Boot] [PATCH v6 20/34] imx8: cpu: add function for reading FEC MAC from fuse

[Peng Fan]

Hi Anatolij,

> -----Original Message-----
> From: Anatolij Gustschin [mailto:agust at denx.de]
> Sent: 2018年10月18日 20:28
> To: u-boot at lists.denx.de; Peng Fan <peng.fan at nxp.com>; sbabic at denx.de
> Subject: [PATCH v6 20/34] imx8: cpu: add function for reading FEC MAC from
> fuse
> 
> FEC driver requires imx_get_mac_from_fuse(). Add it in preparation for ENETx
> support.
> 
> Signed-off-by: Anatolij Gustschin <agust at denx.de>
> Cc: Stefano Babic <sbabic at denx.de>
> ---
>  arch/arm/mach-imx/imx8/cpu.c | 38
> ++++++++++++++++++++++++++++++++++++
>  1 file changed, 38 insertions(+)
> 
> diff --git a/arch/arm/mach-imx/imx8/cpu.c b/arch/arm/mach-imx/imx8/cpu.c
> index d80b4b175d..da34a94a23 100644
> --- a/arch/arm/mach-imx/imx8/cpu.c
> +++ b/arch/arm/mach-imx/imx8/cpu.c
> @@ -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); }

Reviewed-by: Peng Fan <peng.fan at nxp.com>

Thanks,
Peng.

> --
> 2.17.1