linux-kernel - Re: [PATCH] rtc: optee: add RTC driver for OP-TEE RTC PTA

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Message-ID: <20220307110434.33fd2f87@fixe.home>
Date:   Mon, 7 Mar 2022 11:04:34 +0100
From:   Clément Léger <clement.leger@...tlin.com>
To:     Etienne Carriere <etienne.carriere@...aro.org>
Cc:     Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        linux-kernel@...r.kernel.org, linux-rtc@...r.kernel.org,
        Jens Wiklander <jens.wiklander@...aro.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH] rtc: optee: add RTC driver for OP-TEE RTC PTA

Le Sun, 6 Mar 2022 22:08:48 +0100,
Etienne Carriere <etienne.carriere@...aro.org> a écrit :

> Hello Clement,
> 
> In the code, rtc-optee driver opens a session with optee and allocates
> shared memory from probe to remove time.
> This uses resources in the TEE but RTC is not accessed often by Linux I guess.
> Would it be interesting if a session is opened and shared memory
> allocated only when a RPC command is to be invoked?

Hi Etienne, that is an idea that could be added later I guess ?

> 
> Minor comments below.

Thanks for the review.

-- 
Clément Léger,
Embedded Linux and Kernel engineer at Bootlin
https://bootlin.com