linux-kernel - Re: [PATCH 2/7] soc: qcom: geni: move struct geni

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Message-ID: <20210111174342.GB2771@vkoul-mobl>
Date:   Mon, 11 Jan 2021 23:13:42 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Mark Brown <broonie@...nel.org>, Wolfram Sang <wsa@...nel.org>,
        linux-arm-msm@...r.kernel.org, Andy Gross <agross@...nel.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        Douglas Anderson <dianders@...omium.org>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Amit Pundir <amit.pundir@...aro.org>,
        linux-spi@...r.kernel.org, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/7] soc: qcom: geni: move struct geni_wrapper to header

On 11-01-21, 09:34, Bjorn Andersson wrote:
> On Mon 11 Jan 09:16 CST 2021, Vinod Koul wrote:
> 
> > I2C geni driver needs to access struct geni_wrapper, so move it to
> > header.
> > 
> 
> Please tell me more!
> 
> Glanced through the other patches and the only user I can find it in
> patch 5 where you use this to get the struct device * of the wrapper.

That is correct. The dma mapping needs to be done with SE device.

> At least in the DT case this would be [SE]->dev->parent, perhaps we
> can't rely on this due to ACPI?

I would have missed that then, but I somehow recall trying that.. Though
I have not looked into ACPI..

Given that we would need to worry about ACPI, do you recommend using
parent or keeping this

-- 
~Vinod