Patch "arm64: dts: imx8mm-kontron: Fix CAN SPI clock frequency" has been added to the 5.14-stable tree

[<gregkh@xxxxxxxxxxxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    arm64: dts: imx8mm-kontron: Fix CAN SPI clock frequency

to the 5.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     arm64-dts-imx8mm-kontron-fix-can-spi-clock-frequency.patch
and it can be found in the queue-5.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From ca6f9d85d5944046a241b325700c1ca395651c28 Mon Sep 17 00:00:00 2001
From: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx>
Date: Fri, 15 Oct 2021 14:48:39 +0200
Subject: arm64: dts: imx8mm-kontron: Fix CAN SPI clock frequency

From: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx>

commit ca6f9d85d5944046a241b325700c1ca395651c28 upstream.

The MCP2515 can be used with an SPI clock of up to 10 MHz. Set the
limit accordingly to prevent any performance issues caused by the
really low clock speed of 100 kHz.

This removes the arbitrarily low limit on the SPI frequency, that was
caused by a typo in the original dts.

Without this change, receiving CAN messages on the board beyond a
certain bitrate will cause overrun errors (see 'ip -det -stat link show
can0').

With this fix, receiving messages on the bus works without any overrun
errors for bitrates up to 1 MBit.

Fixes: 8668d8b2e67f ("arm64: dts: Add the Kontron i.MX8M Mini SoMs and baseboards")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx>
Signed-off-by: Shawn Guo <shawnguo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-s.dts |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-s.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-s.dts
@@ -97,7 +97,7 @@
 		clocks = <&osc_can>;
 		interrupt-parent = <&gpio4>;
 		interrupts = <28 IRQ_TYPE_EDGE_FALLING>;
-		spi-max-frequency = <100000>;
+		spi-max-frequency = <10000000>;
 		vdd-supply = <&reg_vdd_3v3>;
 		xceiver-supply = <&reg_vdd_5v>;
 	};


Patches currently in stable-queue which might be from frieder.schrempf@xxxxxxxxxx are

queue-5.14/arm64-dts-imx8mm-kontron-fix-polarity-of-reg_rst_eth2.patch
queue-5.14/arm64-dts-imx8mm-kontron-fix-connection-type-for-vsc8531-rgmii-phy.patch
queue-5.14/arm64-dts-imx8mm-kontron-make-sure-soc-and-dram-supply-voltages-are-correct.patch
queue-5.14/arm64-dts-imx8mm-kontron-set-lower-limit-of-vdd_snvs-to-800-mv.patch
queue-5.14/arm64-dts-imx8mm-kontron-fix-can-spi-clock-frequency.patch