Subject: Re: [PATCH V9 2/2] mailbox: introduce ARM SMC based mailbox

From: Florian Fainelli <[email-masked]>
Date: Thu, 26 Sep 2019 19:39:26 -0700

On 9/24/2019 7:09 PM, Peng Fan wrote:
> From: Peng Fan <[email-masked]>
> 
> This mailbox driver implements a mailbox which signals transmitted data
> via an ARM smc (secure monitor call) instruction. The mailbox receiver
> is implemented in firmware and can synchronously return data when it
> returns execution to the non-secure world again.
> An asynchronous receive path is not implemented.
> This allows the usage of a mailbox to trigger firmware actions on SoCs
> which either don't have a separate management processor or on which such
> a core is not available. A user of this mailbox could be the SCP
> interface.
> 
> Modified from Andre Przywara's v2 patch
> https://lore.kernel.org/patchwork/patch/812999/
> 
> Cc: Andre Przywara <[email-masked]>
> Signed-off-by: Peng Fan <[email-masked]>

Reviewed-by: Florian Fainelli <[email-masked]>

Thanks for your persistence working on this!
-- 
Florian

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