[PATCH] ARM: dts: imx7s: Pass the 'fsl,sec-era' property

[festevam@gmail.com (Fabio Estevam)]

From: Fabio Estevam <fabio.estevam@nxp.com>

Currently the following error is seen from the CAAM driver:

caam 30900000.caam: device ID = 0x0a16030000000000 (Era -524)

Pass the 'fsl,sec-era' property to properly describe the
era information.

This error happens because the 'fsl,sec-era' is not passed via
device tree.

The era information is used in various places inside drivers/crypto/caam,
so pass the correct version via device tree.

Fixes: 0eeabcad7da5 ("ARM: dts: imx7s: add CAAM device node")
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
---
I have sent a patch for 4.18 that allows retrieving the era information
from the CAAM registers in run-time:
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/drivers/crypto/caam/ctrl.c?h=next-20180424&id=654f2b937b389295581bcb4aa26011a63db7bc8f

This will only be applied in 4.18 though.

In order to avoid i.MX7 report the incorrect era version in 4.17,
let's pass this property.

 arch/arm/boot/dts/imx7s.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/imx7s.dtsi b/arch/arm/boot/dts/imx7s.dtsi
index a6fe324..b416d2b 100644
--- a/arch/arm/boot/dts/imx7s.dtsi
+++ b/arch/arm/boot/dts/imx7s.dtsi
@@ -884,6 +884,7 @@
 
 			crypto: caam at 30900000 {
 				compatible = "fsl,sec-v4.0";
+				fsl,sec-era = <8>;
 				#address-cells = <1>;
 				#size-cells = <1>;
 				reg = <0x30900000 0x40000>;
-- 
2.7.4