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    SubjectRe: [PATCH v4 04/14] net: phy: adin: add {write,read}_mmd hooks
    On Mon, Aug 12, 2019 at 02:23:40PM +0300, Alexandru Ardelean wrote:
    > Both ADIN1200 & ADIN1300 support Clause 45 access for some registers.
    > The Extended Management Interface (EMI) registers are accessible via both
    > Clause 45 (at register MDIO_MMD_VEND1) and using Clause 22.
    >
    > The Clause 22 access for MMD regs differs from the standard one defined by
    > 802.3. The ADIN PHYs use registers ExtRegPtr (0x0010) and ExtRegData
    > (0x0011) to access Clause 45 & EMI registers.
    >
    > The indirect access is done via the following mechanism (for both R/W):
    > 1. Write the address of the register in the ExtRegPtr
    > 2. Read/write the value of the register via reg ExtRegData
    >
    > This mechanism is needed to manage configuration of chip settings and to
    > access EEE registers via Clause 22.
    >
    > Since Clause 45 access will likely never be used, it is not implemented via
    > this hook.
    >
    > Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>

    Reviewed-by: Andrew Lunn <andrew@lunn.ch>

    Andrew

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