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

diff --git a/arch/arm/dts/zynqmp-sck-kr-g-revA.dts b/arch/arm/dts/zynqmp-sck-kr-g-revA.dts
index caaf71d729e4c918f2bfb76288261229e4bd68dc..d318773bd9d60a6c078dd224e1774fb4699f534f 100644 (file)
--- 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 f9d87559a719af12c1f8dcb7ef30e5ff630449b9..69dba0761b3752bd7e2b576199bf6a2d6fbee8d4 100644 (file)
--- 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>;
                };