Commit 26279c8d authored by Shengjiu Wang's avatar Shengjiu Wang Committed by Frank Li
Browse files

bus: imx-aipstz: set default value for opacr registers 



The sdma script app_2_mcu needs the permission to access the peripheral
devices:

1) SDMA2 transactions are set to user-mode in this particular case.
2) This type of script doesn't use the peripheral interface (connected
directly to SPBA), but it uses the peripheral DMA interface, then the
SDMA2-issued transactions are subjected to AIPSTZ5's security-related
checks.

So need to clear the Supervisor Protect bit of SPBA2, otherwise the sdma
script can't work. As the imx-aipstz is a common driver for all aips bus,
so set default value (zero) for all opacr registers.

Signed-off-by: default avatarShengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: default avatarLaurentiu Mihalcea <laurentiu.mihalcea@nxp.com>
Reviewed-by: default avatarDaniel Baluta <daniel.baluta@nxp.com>
Reviewed-by: default avatarFrank Li <Frank.Li@nxp.com>
Signed-off-by: default avatarFrank Li <Frank.Li@nxp.com>
parent 6de23f81

drivers/bus/imx-aipstz.c

+15 −0
Original line number Diff line number Diff line
@@ -11,9 +11,19 @@ 
#include <linux/regmap.h>



#define IMX_AIPSTZ_MPR0 0x0

#define IMX_AIPSTZ_OPACR0 0x40

#define IMX_AIPSTZ_OPACR1 0x44

#define IMX_AIPSTZ_OPACR2 0x48

#define IMX_AIPSTZ_OPACR3 0x4c

#define IMX_AIPSTZ_OPACR4 0x50



struct imx_aipstz_config {

	u32 mpr0;

	u32 opacr0;

	u32 opacr1;

	u32 opacr2;

	u32 opacr3;

	u32 opacr4;

};



struct imx_aipstz_data {
@@ -24,6 +34,11 @@ struct imx_aipstz_data { 
static void imx_aipstz_apply_default(struct imx_aipstz_data *data)

{

	writel(data->default_cfg->mpr0, data->base + IMX_AIPSTZ_MPR0);

	writel(data->default_cfg->opacr0, data->base + IMX_AIPSTZ_OPACR0);

	writel(data->default_cfg->opacr1, data->base + IMX_AIPSTZ_OPACR1);

	writel(data->default_cfg->opacr2, data->base + IMX_AIPSTZ_OPACR2);

	writel(data->default_cfg->opacr3, data->base + IMX_AIPSTZ_OPACR3);

	writel(data->default_cfg->opacr4, data->base + IMX_AIPSTZ_OPACR4);

}



static const struct of_device_id imx_aipstz_match_table[] = {