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ARM: i.MX: Disable supervisor protect for i.MX51

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Most peripherals on the i.MX51 have an Off-Platform Peripheral Access
Control Register (OPACR) in which the access rights (together with the
MPROT registers) can be declared.
However, this does not seem to work for example for SSI1+SDMA, because the
supervisor bit is not set for the SDMA unit.
A similar problem was described in the patch for i.MX53 CPU
(ARM: i.MX53: globally disable supervisor protect), and the same solution
is applicable for i.MX51 CPU.
Patch has tested on custom board based on Digi CCMX-51 module (i.MX51).

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Alexander Shiyan 2016-06-25 08:26:15 +03:00 committed by Shawn Guo
parent 47096103ef
commit 463f90fa8a
1 changed files with 2 additions and 0 deletions
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arch/arm/mach-imx/mach-imx51.c
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@ -54,6 +54,8 @@ static void __init imx51_dt_init(void)
imx_src_init();
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
imx_aips_allow_unprivileged_access("fsl,imx51-aipstz");
}
static void __init imx51_init_late(void)