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

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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: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
This commit is contained in:
Shengjiu Wang
2026-01-26 17:11:56 +08:00
committed by Frank Li
parent 6de23f81a5
commit 26279c8d5e
1 changed files with 15 additions and 0 deletions
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15
drivers/bus/imx-aipstz.c
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@@ -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[] = {