From 414fc91f4ecbcd00a7d23e33baf39a0e2f6bac96 Mon Sep 17 00:00:00 2001 From: Harini Katakam <harini.katakam@amd.com> Date: Mon, 10 Jul 2023 14:37:32 +0200 Subject: [PATCH] arm64: zynqmp: Increase reset assert time for TI SGMII PHY Increase reset assert time for TI SGMII PHY on KR260 CC starting 6.1 kernel. This PHY does not come out of reset with the existing 100us pulse width as per testing on multiple carrier cards. The reset is driven via a PCA9570 I2C expander. The expander driver was updated to an upstream version in 6.1 where gpio_chip _set was optimized. Delays in earlier kernels may have masked this issue. This is a safe workaround value for assert pulse width before the discussions are resolved with TI. Signed-off-by: Harini Katakam <harini.katakam@amd.com> Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com> Signed-off-by: Michal Simek <michal.simek@amd.com> Link: https://lore.kernel.org/r/8fb9f17d43a43ef504c9f29006cd686cce8ac98b.1688992653.git.michal.simek@amd.com --- arch/arm/dts/zynqmp-sck-kr-g-revA.dts | 2 +- arch/arm/dts/zynqmp-sck-kr-g-revB.dts | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/dts/zynqmp-sck-kr-g-revA.dts b/arch/arm/dts/zynqmp-sck-kr-g-revA.dts index caaf71d729..d318773bd9 100644 --- a/arch/arm/dts/zynqmp-sck-kr-g-revA.dts +++ b/arch/arm/dts/zynqmp-sck-kr-g-revA.dts @@ -210,7 +210,7 @@ ti,tx-internal-delay = <DP83867_RGMIIDCTL_2_75_NS>; ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>; ti,dp83867-rxctrl-strap-quirk; - reset-assert-us = <100>; + reset-assert-us = <300>; reset-deassert-us = <280>; reset-gpios = <&slg7xl45106 5 GPIO_ACTIVE_LOW>; }; diff --git a/arch/arm/dts/zynqmp-sck-kr-g-revB.dts b/arch/arm/dts/zynqmp-sck-kr-g-revB.dts index f9d87559a7..69dba0761b 100644 --- a/arch/arm/dts/zynqmp-sck-kr-g-revB.dts +++ b/arch/arm/dts/zynqmp-sck-kr-g-revB.dts @@ -210,7 +210,7 @@ ti,tx-internal-delay = <DP83867_RGMIIDCTL_2_75_NS>; ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>; ti,dp83867-rxctrl-strap-quirk; - reset-assert-us = <100>; + reset-assert-us = <300>; reset-deassert-us = <280>; reset-gpios = <&slg7xl45106 5 GPIO_ACTIVE_LOW>; }; -- 2.39.5