linux-kernel - Re: [PATCH v2] ARC: reset: introduce AXS10x reset driver

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Message-ID: <1505736441.9807.8.camel@pengutronix.de>
Date:   Mon, 18 Sep 2017 14:07:21 +0200
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>
Cc:     linux-snps-arc@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH v2] ARC: reset: introduce AXS10x reset driver

On Thu, 2017-09-14 at 17:28 +0300, Eugeniy Paltsev wrote:
> ARC AXS10x boards support custom IP-block which allows to control
> reset signals of selected peripherals. For example DW GMAC, etc...
> This block is controlled via memory-mapped register (AKA CREG) which
> represents up-to 32 reset lines. This regiter is self-clearing so we
> don't need to deassert line after reset.
> 
> As of today only the following lines are used:
>  - DW GMAC - line 5
> 
> > Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>
> ---
> Changes v1 -> v2:
>   * The creg reset register is self-clearing so we don't need to clear it
>     manually. Fixed it.
>   * Use reset callback instead of assert/deassert pair.
>   * Rename reset node in documentation to "reset-controller" for consistency
>     with the other bindings.
>   * Use devm_reset_controller_register instead of reset_controller_register
> 
> NOTE:
>     This driver couldn't be replaced by reset-simple driver as we mustn't
>     read from reset register or clear it.

Thanks, I've applied this patch to the reset/next branch.

regards
Philipp