From: Shengjiu Wang Date: Mon, 26 Jan 2026 09:11:56 +0000 (+0800) Subject: bus: imx-aipstz: set default value for opacr registers X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=26279c8d5ede072e8fad9b2f14b03fc27888f471;p=thirdparty%2Fkernel%2Fstable.git 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: Shengjiu Wang Reviewed-by: Laurentiu Mihalcea Reviewed-by: Daniel Baluta Reviewed-by: Frank Li Signed-off-by: Frank Li --- diff --git a/drivers/bus/imx-aipstz.c b/drivers/bus/imx-aipstz.c index 5fdf377f5d063..83371e5b35a2d 100644 --- a/drivers/bus/imx-aipstz.c +++ b/drivers/bus/imx-aipstz.c @@ -11,9 +11,19 @@ #include #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[] = {