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Date: Tue, 21 Jan 2020 15:46:02 +0800
From: Orson Zhai <orson.zhai@...eadtrum.com>
To: Lee Jones <lee.jones@...aro.org>
CC: Orson Zhai <orson.zhai@...soc.com>, Arnd Bergmann <arnd@...db.de>,
<linux-kernel@...r.kernel.org>, <baolin.wang@...soc.com>,
<chunyan.zhang@...soc.com>, <orson.unisoc@...il.com>
Subject: Re: [PATCH v4] mfd: syscon: Add arguments support for syscon
reference
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@...soc.com>
> > Tested-by: Baolin Wang <baolin.wang@...soc.com>
> > Reviewed-by: Arnd Bergmann <arnd@...db.de>
> > Acked-by: Lee Jones <lee.jones@...aro.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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