Re: [PATCH net-next v1 5/5] net: dsa: microchip: add support for side MDIO interface in LAN937x
From: Andrew Lunn
Date: Mon Oct 28 2024 - 08:16:03 EST
> +static const u8 lan9370_phy_addr[] = {
> + [0] = 2, /* Port 1, T1 AFE0 */
> + [1] = 3, /* Port 2, T1 AFE1 */
> + [2] = 5, /* Port 3, T1 AFE3 */
> + [3] = 6, /* Port 4, T1 AFE4 */
> + [4] = U8_MAX, /* Port 5, RGMII 2 */
> +};
I think it would be good to add a #define for U8_MAX which gives a
hint at its meaning.
> + for (i = 0; i < dev->info->port_cnt; i++) {
> + if (phy_addr_map[i] == U8_MAX)
> + dev->phy_addr_map[i] = phy_addr_map[i];
> + else
> + dev->phy_addr_map[i] = phy_addr_map[i] + offset;
> + }
My first guess was that U8_MAX means the PHY is external, so could be
on any address depending on strapping. Looking at this code, i'm not
sure it does actually mean that.
Andrew
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