From: Laurentiu Mihalcea <laurentiumihalcea111@gmail.com>
To: Shengjiu Wang <shengjiu.wang@nxp.com>,
shawnguo@kernel.org, s.hauer@pengutronix.de,
kernel@pengutronix.de, festevam@gmail.com,
laurentiu.mihalcea@nxp.com, daniel.baluta@nxp.com,
imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, shengjiu.wang@gmail.com
Subject: Re: [PATCH v2] bus: imx-aipstz: set default value for opacr registers
Date: Mon, 26 Jan 2026 07:22:54 -0800 [thread overview]
Message-ID: <b7c2a2b8-000e-4bf8-89cf-19e4e21e78a7@gmail.com> (raw)
In-Reply-To: <20260126091156.951052-1-shengjiu.wang@nxp.com>
On 1/26/2026 1:11 AM, Shengjiu Wang wrote:
> 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>
next prev parent reply other threads:[~2026-01-26 15:22 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-26 9:11 [PATCH v2] bus: imx-aipstz: set default value for opacr registers Shengjiu Wang
2026-01-26 14:47 ` Daniel Baluta
2026-01-26 15:22 ` Laurentiu Mihalcea [this message]
2026-01-26 16:41 ` Frank Li
2026-02-24 19:36 ` Frank Li
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