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ARM: dts: n900: Enable omap sham and include directly omap34xx.dtsi

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This patch moves content of file omap34xx-hs.dtsi into omap3-n900.dts and enable
omap sham support (omap HW support for SHA + MD5). After testing both omap hwmod
and omap-sham.ko drivers it looks like signed Nokia X-Loader enable L3 firewall
for omap sham. There is no kernel crash with both official bootloader and crypto
enable bootloader. So we can safely enable sham code.

Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Pali Rohár 2015-02-26 14:49:58 +01:00 committed by Tony Lindgren
parent a494e32d3a
commit 69540a7c27
1 changed files with 15 additions and 1 deletions
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16
arch/arm/boot/dts/omap3-n900.dts
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@ -9,9 +9,23 @@
/dts-v1/;
#include "omap34xx-hs.dtsi"
#include "omap34xx.dtsi"
#include <dt-bindings/input/input.h>
/*
* Default secure signed bootloader (Nokia X-Loader) does not enable L3 firewall
* for omap AES HW crypto support. When linux kernel try to access memory of AES
* blocks then kernel receive "Unhandled fault: external abort on non-linefetch"
* and crash. Until somebody fix omap-aes.c and omap_hwmod_3xxx_data.c code (no
* crash anymore) omap AES support will be disabled for all Nokia N900 devices.
* There is "unofficial" version of bootloader which enables AES in L3 firewall
* but it is not widely used and to prevent kernel crash rather AES is disabled.
* There is also no runtime detection code if AES is disabled in L3 firewall...
*/
&aes {
status = "disabled";
};
/ {
model = "Nokia N900";
compatible = "nokia,omap3-n900", "ti,omap3430", "ti,omap3";