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List:       linux-omap
Subject:    Re: [PATCH 1/4] pinctrl: Introduce generic #pinctrl-cells and pinctrl_parse_index_with_args
From:       Rob Herring <robh () kernel ! org>
Date:       2016-10-31 6:13:36
Message-ID: 20161031061336.ya6jcjttvbgdqnld () rob-hp-laptop
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On Fri, Oct 28, 2016 at 09:53:38AM -0700, Tony Lindgren wrote:
> * Tony Lindgren <tony@atomide.com> [161027 07:59]:
> > * Linus Walleij <linus.walleij@linaro.org> [161027 00:57]:
> > > On Tue, Oct 25, 2016 at 6:45 PM, Tony Lindgren <tony@atomide.com> wrote:
> > > > +/*
> > > > + * For pinctrl binding, typically #pinctrl-cells is for the pin controller
> > > > + * device, so either parent or grandparent. See pinctrl-bindings.txt.
> > > > + */
> > > > +static int pinctrl_find_cells_size(const struct device_node *np,
> > > > +                                  const char *cells_name)
> > > > +{
> > > > +       int cells_size, error;
> > > > +
> > > > +       error = of_property_read_u32(np->parent, cells_name, &cells_size);
> > > > +       if (error) {
> > > > +               error = of_property_read_u32(np->parent->parent,
> > > > +                                            cells_name, &cells_size);
> > > > +               if (error)
> > > > +                       return -ENOENT;
> > > > +       }
> > > > +
> > > > +       return cells_size;
> > > > +}
> > > 
> > > Can't we just hardcode this to "#pinctrl-cells" and skip the cells_name
> > > parameter? We can parametrize it the day we need it instead.
> > 
> > Sure we can do that.
> > 
> > > The rest of the helpers look nice and clean.
> > 
> > OK cool thanks,
> 
> Below is an updated version of this patch with documentation updated
> and cells_name removed. I'll repost the whole series once the DT
> binding has been reviewed.
> 
> Regards,
> 
> Tony
> 8< -------------------------
> From tony Mon Sep 17 00:00:00 2001
> From: Tony Lindgren <tony@atomide.com>
> Date: Tue, 25 Oct 2016 08:33:34 -0700
> Subject: [PATCH] pinctrl: Introduce generic #pinctrl-cells and
>  pinctrl_parse_index_with_args
> 
> Introduce #pinctrl-cells helper binding and generic helper functions
> pinctrl_count_index_with_args() and pinctrl_parse_index_with_args().
> 
> Signed-off-by: Tony Lindgren <tony@atomide.com>
> ---
>  .../bindings/pinctrl/pinctrl-bindings.txt          |  44 ++++++-

Acked-by: Rob Herring <robh@kernel.org>

>  drivers/pinctrl/devicetree.c                       | 144 +++++++++++++++++++++
>  drivers/pinctrl/devicetree.h                       |  21 +++
>  3 files changed, 208 insertions(+), 1 deletion(-)
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