linux-kernel - Re: [PATCH] firmware: xilinx: Add TF_A_PM_REGISTER

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Message-ID: <deee3dfe-0488-0dc0-f651-0fbf46851619@xilinx.com>
Date:   Tue, 7 Jun 2022 11:19:08 +0200
From:   Michal Simek <michal.simek@...inx.com>
To:     Tanmay Shah <tanmay.shah@...inx.com>, <michal.simek@...inx.com>,
        <abhyuday.godhasara@...inx.com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] firmware: xilinx: Add TF_A_PM_REGISTER_SGI SMC call



On 5/26/22 21:39, Tanmay Shah wrote:
> SGI interrupt register and reset is performed by EEMI ioctl
> IOCTL_REGISTER_SGI. However, this is not correct use of EEMI call.
> SGI registration functionality does not qualify as energy management
> activity and so shouldn't be mapped to EEMI call.
> 
> This new call will replace IOCTL_REGISTER_SGI and will  be handled by TF-A
> specific handler in TF-A. To maintain backward compatibility for a while
> firmware driver will still use IOCTL_REGISTER_SGI as fallback strategy if
> new call fails or is not supported by TF-A.
> 
> This new design also helps to make TF-A as pass through layer for EEMI
> calls. So we don't have to maintain PM_IOCTL as EEMI API ID in TF-A.

here should be newline.

> Signed-off-by: Tanmay Shah <tanmay.shah@...inx.com>

Other then this:
Acked-by: Michal Simek <michal.simek@....com>

Thanks,
Michal