[PATCH v2 4/4] arm64: dts: imx8mp-venice-gw74xx: fix TPM SPI frequency

[Tim Harvey]

The IMX8MPDS Table 37 [1] shows that the max SPI master read frequency
depends on the pins the interface is muxed behind with ECSPI2
muxed behind ECSPI2 supporting up to 25MHz.

Adjust the spi-max-frequency based on these findings.

[1] https://www.nxp.com/webapp/Download?colCode=IMX8MPIEC

Fixes: 531936b218d8 ("arm64: dts: imx8mp-venice-gw74xx: update to revB PCB")
Cc: stable at vger.kernel.org
Signed-off-by: Tim Harvey <tharvey at gateworks.com>
---
v2:
 - add cc to stable
 - add missing reference
---
 arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts b/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts
index f00099f0cd4e..12de7cf1e853 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts
@@ -201,7 +201,7 @@ &ecspi1 {
 	tpm at 0 {
 		compatible = "atmel,attpm20p", "tcg,tpm_tis-spi";
 		reg = <0x0>;
-		spi-max-frequency = <36000000>;
+		spi-max-frequency = <25000000>;
 	};
 };
 
-- 
2.25.1