On Sun, Jun 02, 2019 at 03:13:00PM +0100, Russell King wrote:
> Some SFP modules do not like reads longer than 16 bytes, so read the
> EEPROM in chunks of 16 bytes at a time. This behaviour is not specified
> in the SFP MSAs, which specifies:
>
> "The serial interface uses the 2-wire serial CMOS E2PROM protocol
> defined for the ATMEL AT24C01A/02/04 family of components."
>
> and
>
> "As long as the SFP+ receives an acknowledge, it shall serially clock
> out sequential data words. The sequence is terminated when the host
> responds with a NACK and a STOP instead of an acknowledge."
>
> We must avoid breaking a read across a 16-bit quantity in the diagnostic
> page, thankfully all 16-bit quantities in that page are naturally
> aligned.
>
> Signed-off-by: Russell King <rmk+ker...@armlinux.org.uk>
Reviewed-by: Andrew Lunn <and...@lunn.ch>
Andrew
