linux-kernel - Re: [PATCH] ASoC: rt5677: add SPI

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Message-ID: <CAOReqxh9wamuKQnjPqUsZS_=4xUbsy-Y3v+=OXGaWV5EuONPmA@mail.gmail.com>
Date:   Mon, 6 Jan 2020 17:45:22 -0800
From:   Curtis Malainey <cujomalainey@...gle.com>
To:     Jon Hunter <jonathanh@...dia.com>
Cc:     Arnd Bergmann <arnd@...db.de>, Mark Brown <broonie@...nel.org>,
        Ben Zhang <benzh@...omium.org>,
        Curtis Malainey <cujomalainey@...omium.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Cezary Rojewski <cezary.rojewski@...el.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Jie Yang <yang.jie@...ux.intel.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
        KaiChieh Chuang <kaichieh.chuang@...iatek.com>,
        ALSA development <alsa-devel@...a-project.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-tegra <linux-tegra@...r.kernel.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH] ASoC: rt5677: add SPI_MASTER dependency

On Wed, Dec 11, 2019 at 3:00 AM Jon Hunter <jonathanh@...dia.com> wrote:
>
>
> On 10/12/2019 19:52, Arnd Bergmann wrote:
> > When CONFIG_SPI is disabled, the newly added code for the DSP
> > firmware loading fails to link:
> >
> > ERROR: "rt5677_spi_hotword_detected" [sound/soc/codecs/snd-soc-rt5677.ko] undefined!
> > ERROR: "rt5677_spi_write" [sound/soc/codecs/snd-soc-rt5677.ko] undefined!
>
> Would it be better if the above functions or the functions that call
> these are conditional on CONFIG_SND_SOC_RT5677_SPI?
>
> > Add a dependency to prevent this configuration.
> >
> > Note: the does not work with the DT probing, as there is no binding
>
> Are you missing 'SPI' or something here?
>
> > for the SPI half of the driver, but nothing seems to be using that
> > with the mainline kernel anyway.
>
> From a Tegra perspective, given that we don't use SPI in conjunction
> with the rt5677 codec, only I2C so far, I am not sure we should make the
> tegra_rt5677 driver dependent upon it. We should be able to operate
> without the SPI bits enabled.
>
There should be no changes needed for tegra, this should be isolated
to the bdw machine driver. The only things added to the machine driver
were some dai links.
> Cheers
> Jon
>
> --
> nvpublic