Re: [PATCH 1/8] gpio: Add Elba SoC gpio driver for spi cs control
From: Andy Shevchenko
Date: Mon Mar 29 2021 - 06:41:52 EST
On Mon, Mar 29, 2021 at 4:19 AM Brad Larson <brad@xxxxxxxxxxx> wrote:
> On Sun, Mar 7, 2021 at 11:21 AM Andy Shevchenko
> <andy.shevchenko@xxxxxxxxx> wrote:
> > On Thu, Mar 4, 2021 at 4:40 PM Brad Larson <brad@xxxxxxxxxxx> wrote:
...
> > > +config GPIO_ELBA_SPICS
> > > + bool "Pensando Elba SPI chip-select"
> >
> > Can't it be a module? Why?
>
> All Elba SoC based platforms require this driver to be built-in to boot and
> removing the module would result in a variety of exceptions/errors.
Needs to be at least in the commit message.
> > > + depends on ARCH_PENSANDO_ELBA_SOC
> > > + help
> > > + Say yes here to support the Pensndo Elba SoC SPI chip-select driver
> >
> > Please give more explanation what it is and why users might need it,
> > and also tell users how the module will be named (if there is no
> > strong argument why it can't be a module).
> >
> Fixed the typo.
Yeah, according to the above, you better elaborate what this module is
and why people would need it.
Also can be a good hint to add
default ARCH_MY_COOL_PLATFORM
...
> > > +#include <linux/of.h>
> >
> > It's not used here, but you missed mod_devicetable.h.
>
> Removed <linux/of.h>. There is no dependency on mod_devicetable.h.
What do you mean? You don't use data structures from that?
of_device_id or other ID structures are defined there. Your module
works without them?
...
> > > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > > + p->base = devm_ioremap_resource(&pdev->dev, res);
> >
> > p->base = devm_platform_ioremap_resource(pdev, 0);
>
> Implementation follows devm_ioremap_resource() example in lib/devres.c.
So? How does this make it impossible to address my comment?
> > > + if (IS_ERR(p->base)) {
> >
> > > + dev_err(&pdev->dev, "failed to remap I/O memory\n");
> >
> > Duplicate noisy message.
> >
> > > + return PTR_ERR(p->base);
> > > + }
--
With Best Regards,
Andy Shevchenko