Re: [PATCH v2] arm64: dts: imx8mq-kontron-pitx-imx8m: pass phy reset delays

2021-03-28 Thread Shawn Guo
On Tue, Mar 23, 2021 at 03:00:21PM +0100, Heiko Thiery wrote: > The TI DP83867 PHY datasheet says: > T1: Post RESET stabilization time == 195us > T3: Hardware configuration pins transition to output drivers == 64us > T4: RESET pulse width == 1us > > So with a little overhead set 'reset-assert-us'

[PATCH v2] arm64: dts: imx8mq-kontron-pitx-imx8m: pass phy reset delays

2021-03-23 Thread Heiko Thiery
The TI DP83867 PHY datasheet says: T1: Post RESET stabilization time == 195us T3: Hardware configuration pins transition to output drivers == 64us T4: RESET pulse width == 1us So with a little overhead set 'reset-assert-us' to 10us (T4) and 'reset-deassert-us' to 280us (T1+T3). Without these rese