linux-kernel - Re: [PATCH v2 03/13] spi: dw: Add support for Pensando Elba SoC SPI

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Message-ID: <CAK9rFnzdPpVBZu8uxHU04pak9OxPMjFqAt_qnPQY2qK2WK4rTQ@mail.gmail.com>
Date:   Sun, 22 Aug 2021 18:25:35 -0700
From:   Brad Larson <brad@...sando.io>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        Arnd Bergmann <arnd@...db.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Mark Brown <broonie@...nel.org>,
        Serge Semin <fancer.lancer@...il.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Olof Johansson <olof@...om.net>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        linux-spi <linux-spi@...r.kernel.org>,
        linux-mmc <linux-mmc@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 03/13] spi: dw: Add support for Pensando Elba SoC SPI

Hi Andy,

On Mon, Mar 29, 2021 at 3:43 AM Andy Shevchenko
<andy.shevchenko@...il.com> wrote:
>
> On Mon, Mar 29, 2021 at 5:01 AM Brad Larson <brad@...sando.io> wrote:
> >
> > The Pensando Elba SoC uses a GPIO based chip select
> > for two DW SPI busses with each bus having two
> > chip selects.
...
> > +static void dw_spi_elba_set_cs(struct spi_device *spi, bool enable)
> > +{
> > +       struct dw_spi *dws = spi_master_get_devdata(spi->master);
> > +
> > +       if (!enable) {
>
> Can you use positive conditional?

This function has been re-written to use the existing dw_spi_set_cs().
This is what I currently plan for the v3 patchset.

static void dw_spi_elba_set_cs(struct spi_device *spi, bool enable)
{
        spi->chip_select = 0;
        dw_spi_set_cs(spi, enable);
}

Regards,
Brad