[PATCH 3/4] ARM: dts: imx6ul-14x14-evk: Describe the KSZ8081 reset

Andrew Lunn andrew at lunn.ch
Thu Jan 7 20:03:40 EST 2021


On Thu, Jan 07, 2021 at 08:50:43PM -0300, Fabio Estevam wrote:
> There are two KSZ8081 on the imx6ul-14x14-evk: one has the reset line
> controlled by the Q1 output of the 74LV595PW expander, and the other
> by the Q2 output.
> 
> The KSZ8081 datasheet states that the tsr parameter (Stable supply
> voltage (VDDIO, VDDA_3.3) to reset high) to be 10ms minimum and
> "After the de-assertion of reset, wait a minimum of 100 µs before
> starting programming on the MIIM (MDC/MDIO) interface." 
> 
> Describe these parameters in the devicetree.
> 
> Signed-off-by: Fabio Estevam <festevam at gmail.com>

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

    Andrew



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