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Date:   Tue, 21 Jan 2020 15:46:02 +0800
From:   Orson Zhai <orson.zhai@spreadtrum.com>
To:     Lee Jones <lee.jones@linaro.org>
CC:     Orson Zhai <orson.zhai@unisoc.com>, Arnd Bergmann <arnd@arndb.de>,
        <linux-kernel@vger.kernel.org>, <baolin.wang@unisoc.com>,
        <chunyan.zhang@unisoc.com>, <orson.unisoc@gmail.com>
Subject: Re: [PATCH v4] mfd: syscon: Add arguments support for syscon
 reference
Message-ID: <20200121074602.GA9019@lenovo>
References: <1579397619-28547-1-git-send-email-orson.zhai@unisoc.com>
 <20200120080508.GR15507@dell>
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Hi Lee,

On Mon, Jan 20, 2020 at 08:05:08AM +0000, Lee Jones wrote:
> On Sun, 19 Jan 2020, Orson Zhai wrote:
>
> > There are a lot of similar global registers being used across multiple SoCs
> > from Unisoc. But most of these registers are assigned with different offset
> > for different SoCs. It is hard to handle all of them in an all-in-one
> > kernel image.
> >
> > Add a helper function to get regmap with arguments where we could put some
> > extra information such as the offset value.
> >
> > Signed-off-by: Orson Zhai <orson.zhai@unisoc.com>
> > Tested-by: Baolin Wang <baolin.wang@unisoc.com>
> > Reviewed-by: Arnd Bergmann <arnd@arndb.de>
> > Acked-by: Lee Jones <lee.jones@linaro.org>
> > ---
> >
> > V3 Change:
> >  Rebase on latest kernel v5.5-rc6 for Lee.
> >
> > V4 Change:
> >  Remove trailing spaces according to checkpatch.
> >
> >  drivers/mfd/syscon.c       | 29 +++++++++++++++++++++++++++++
> >  include/linux/mfd/syscon.h | 14 ++++++++++++++
> >  2 files changed, 43 insertions(+)
>
> Nope, still not working:

I am very very sorry about this.
I have found these wrong spaces are generated by unisoc mail system
_automatically_.
It always sucks but it is out of my expectation this time.
I have stopped using it and sent V5 patch by gmail.

So sorry for wasting your so much time.

Regards,
Orson

>
>  Applying patch #1181935 using "git am -s -3"
>  Description: [v4] mfd: syscon: Add arguments support for syscon reference
>  Applying: mfd: syscon: Add arguments support for syscon reference
>  Using index info to reconstruct a base tree...
>  M    drivers/mfd/syscon.c
>  /home/lee/projects/linux/kernel/.git/worktrees/mfd/rebase-apply/patch:25: indent with spaces.
>                                         const char *property,
>  /home/lee/projects/linux/kernel/.git/worktrees/mfd/rebase-apply/patch:26: indent with spaces.
>                                         int arg_count,
>  /home/lee/projects/linux/kernel/.git/worktrees/mfd/rebase-apply/patch:27: indent with spaces.
>                                         unsigned int *out_args)
>  /home/lee/projects/linux/kernel/.git/worktrees/mfd/rebase-apply/patch:36: indent with spaces.
>                         0, &args);
>  /home/lee/projects/linux/kernel/.git/worktrees/mfd/rebase-apply/patch:38: indent with spaces.
>                 return ERR_PTR(rc);
>  error: patch failed: drivers/mfd/syscon.c:224
>  error: drivers/mfd/syscon.c: patch does not apply
>  error: patch failed: include/linux/mfd/syscon.h:23
>  error: include/linux/mfd/syscon.h: patch does not apply
>  error: Did you hand edit your patch?
>  It does not apply to blobs recorded in its index.
>  Patch failed at 0001 mfd: syscon: Add arguments support for syscon reference
>  hint: Use 'git am --show-current-patch' to see the failed patch
>  When you have resolved this problem, run "git am --continue".
>  If you prefer to skip this patch, run "git am --skip" instead.
>  To restore the original branch and stop patching, run "git am --abort".
>  'git am' failed with exit status 128
>
> Please talk me through how you are sending the patch.
>
> > diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
> > index e22197c..2918b05 100644
> > --- a/drivers/mfd/syscon.c
> > +++ b/drivers/mfd/syscon.c
> > @@ -224,6 +224,35 @@ struct regmap *syscon_regmap_lookup_by_phandle(struct device_node *np,
> >  }
> >  EXPORT_SYMBOL_GPL(syscon_regmap_lookup_by_phandle);
> >
> > +struct regmap *syscon_regmap_lookup_by_phandle_args(struct device_node *np,
> > +                                       const char *property,
> > +                                       int arg_count,
> > +                                       unsigned int *out_args)
> > +{
> > +       struct device_node *syscon_np;
> > +       struct of_phandle_args args;
> > +       struct regmap *regmap;
> > +       unsigned int index;
> > +       int rc;
> > +
> > +       rc = of_parse_phandle_with_fixed_args(np, property, arg_count,
> > +                       0, &args);
> > +       if (rc)
> > +               return ERR_PTR(rc);
> > +
> > +       syscon_np = args.np;
> > +       if (!syscon_np)
> > +               return ERR_PTR(-ENODEV);
> > +
> > +       regmap = syscon_node_to_regmap(syscon_np);
> > +       for (index = 0; index < arg_count; index++)
> > +               out_args[index] = args.args[index];
> > +       of_node_put(syscon_np);
> > +
> > +       return regmap;
> > +}
> > +EXPORT_SYMBOL_GPL(syscon_regmap_lookup_by_phandle_args);
> > +
> >  static int syscon_probe(struct platform_device *pdev)
> >  {
> >         struct device *dev = &pdev->dev;
> > diff --git a/include/linux/mfd/syscon.h b/include/linux/mfd/syscon.h
> > index 112dc66..714cab1 100644
> > --- a/include/linux/mfd/syscon.h
> > +++ b/include/linux/mfd/syscon.h
> > @@ -23,6 +23,11 @@ extern struct regmap *syscon_regmap_lookup_by_compatible(const char *s);
> >  extern struct regmap *syscon_regmap_lookup_by_phandle(
> >                                         struct device_node *np,
> >                                         const char *property);
> > +extern struct regmap *syscon_regmap_lookup_by_phandle_args(
> > +                                       struct device_node *np,
> > +                                       const char *property,
> > +                                       int arg_count,
> > +                                       unsigned int *out_args);
> >  #else
> >  static inline struct regmap *device_node_to_regmap(struct device_node *np)
> >  {
> > @@ -45,6 +50,15 @@ static inline struct regmap *syscon_regmap_lookup_by_phandle(
> >  {
> >         return ERR_PTR(-ENOTSUPP);
> >  }
> > +
> > +static struct regmap *syscon_regmap_lookup_by_phandle_args(
> > +                                       struct device_node *np,
> > +                                       const char *property,
> > +                                       int arg_count,
> > +                                       unsigned int *out_args)
> > +{
> > +       return ERR_PTR(-ENOTSUPP);
> > +}
> >  #endif
> >
> >  #endif /* __LINUX_MFD_SYSCON_H__ */
>
> --
> Lee Jones [李琼斯]
> Linaro Services Technical Lead
> Linaro.org │ Open source software for ARM SoCs
> Follow Linaro: Facebook | Twitter | Blog
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