| Message ID | 1466832375-32071-1-git-send-email-shc_work@mail.ru |
|---|---|
| State | New |
| Headers | show |
On Sat, Jun 25, 2016 at 08:26:15AM +0300, Alexander Shiyan wrote: > 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> Applied, thanks.
diff --git a/arch/arm/mach-imx/mach-imx51.c b/arch/arm/mach-imx/mach-imx51.c index 10a82a4..1e91740 100644 --- a/arch/arm/mach-imx/mach-imx51.c +++ b/arch/arm/mach-imx/mach-imx51.c @@ -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)
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> --- DTS-part of this patch, I'll send a bit later. Another mention of this problem: https://community.nxp.com/thread/333710 --- arch/arm/mach-imx/mach-imx51.c | 2 ++ 1 file changed, 2 insertions(+)