linux-kernel - Re: [PATCH v3 2/5] spi: sun6i: change OF match data to a struct

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Message-ID: <CALHCpMh84Q8RAh2Y+cHzAvsm4h5zBZY=9fPF6OVmtLNvX+ePxQ@mail.gmail.com>
Date:   Wed, 10 May 2023 11:33:56 +0300
From:   Maxim Kiselev <bigunclemax@...il.com>
To:     David Laight <David.Laight@...lab.com>
Cc:     Andre Przywara <andre.przywara@....com>,
        Icenowy Zheng <icenowy@...c.io>,
        Samuel Holland <samuel@...lland.org>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Cristian Ciocaltea <cristian.ciocaltea@...labora.com>,
        Heiko Stuebner <heiko.stuebner@...ll.eu>,
        Maxime Ripard <mripard@...nel.org>,
        "linux-spi@...r.kernel.org" <linux-spi@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-sunxi@...ts.linux.dev" <linux-sunxi@...ts.linux.dev>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>
Subject: Re: [PATCH v3 2/5] spi: sun6i: change OF match data to a struct

Hi, David

> Is it worth doing a structure copy at this point?
> The 'cfg' data is short and constant and it would make
> the code that uses it smaller and faster.

I'm sorry but I don't fully understand what you are suggesting.
In patch 3\5 we extend the sun6i_spi_cfg structure with the has_clk_ctl field.

пн, 8 мая 2023 г. в 12:47, David Laight <David.Laight@...lab.com>:
>
> From: Maksim Kiselev
> > Sent: 07 May 2023 00:26
> >
> > As we're adding more properties to the OF match data, convert it to a
> > struct now.
> >
> ...
> > -     sspi->fifo_depth = (unsigned long)of_device_get_match_data(&pdev->dev);
> > +     sspi->cfg = of_device_get_match_data(&pdev->dev);
>
> Is it worth doing a structure copy at this point?
> The 'cfg' data is short and constant and it would make
> the code that uses it smaller and faster.
>
>         David
>
> -
> Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
> Registration No: 1397386 (Wales)
>