[RFC PATCH 1/3] pinctrl: imx: add pinmux imx core driver

[Dong Aisheng-B29396]

> -----Original Message-----
> From: Guo Shawn-R65073
> Sent: Tuesday, December 06, 2011 3:06 PM
> To: Dong Aisheng-B29396
> Cc: linux-kernel at vger.kernel.org; linux-arm-kernel at lists.infradead.org;
> linus.walleij at stericsson.com; s.hauer at pengutronix.de;
> kernel at pengutronix.de
> Subject: Re: [RFC PATCH 1/3] pinctrl: imx: add pinmux imx core driver
> 
> On Sun, Dec 04, 2011 at 07:49:42PM +0800, Dong Aisheng wrote:
> > ---
> > This patch series shows the basic idea of driver design. There're
> > still some TODOes like adding more pinmux functions and gpio support.
> > The patch is here for request for comments on the driver design and
> > other might exist issues.
> >
> > Signed-off-by: Dong Aisheng <dong.aisheng at linaro.org>
> > Cc: Linus Walleij <linus.walleij at linaro.org>
> > Cc: Sascha Hauer <s.hauer at pengutronix.de>
> > Cc: Shawn Guo <shanw.guo at freescale.com>
> > ---
> >  drivers/pinctrl/Kconfig           |    6 +
> >  drivers/pinctrl/Makefile          |    2 +
> >  drivers/pinctrl/pinmux-imx-core.c |  284
> +++++++++++++++++++++++++++++++++++++
> >  drivers/pinctrl/pinmux-imx-core.h |   83 +++++++++++
> >  4 files changed, 375 insertions(+), 0 deletions(-)
> >
> > diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index
> > ef56644..214d072 100644
> > --- a/drivers/pinctrl/Kconfig
> > +++ b/drivers/pinctrl/Kconfig
> > @@ -40,4 +40,10 @@ config PINMUX_U300
> >  	help
> >  	  Say Y here to enable the U300 pinmux driver
> >
> > +config PINMUX_IMX
> > +	bool "IMX pinmux driver"
> > +	depends on ARCH_MXC
> > +	select PINMUX
> > +	help
> > +	  Say Y here to enable the IMX pinmux driver
> >  endif
> > diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index
> > bdc548a..764657b 100644
> > --- a/drivers/pinctrl/Makefile
> > +++ b/drivers/pinctrl/Makefile
> > @@ -4,5 +4,7 @@ ccflags-$(CONFIG_DEBUG_PINMUX)	+= -DDEBUG
> >
> >  obj-$(CONFIG_PINCTRL)		+= core.o
> >  obj-$(CONFIG_PINMUX)		+= pinmux.o
> > +obj-$(CONFIG_PINMUX_IMX)	+= pinmux-imx-core.o \
> > +				   pinmux-imx53.o pinmux-imx6q.o
> 
> You do not have pinmux-imx53.c and pinmux-imx6q.c in this patch yet.
> 
> >  obj-$(CONFIG_PINMUX_SIRF)	+= pinmux-sirf.o
> >  obj-$(CONFIG_PINMUX_U300)	+= pinmux-u300.o
> > diff --git a/drivers/pinctrl/pinmux-imx-core.c
> > b/drivers/pinctrl/pinmux-imx-core.c
> > new file mode 100644
> > index 0000000..1e60932
> > --- /dev/null
> > +++ b/drivers/pinctrl/pinmux-imx-core.c
> > @@ -0,0 +1,284 @@
> > +/*
> > + * Core driver for the imx pin controller
> > + *
> > + * Copyright (C) 2011 Freescale Semiconductor, Inc.
> > + * Copyright (C) 2011 Linaro Ltd.
> > + *
> > + * Author: Dong Aisheng <dong.aisheng at linaro.org>
> > + *
> > + * This program is free software; you can redistribute it and/or
> > +modify
> > + * it under the terms of the GNU General Public License as published
> > +by
> > + * the Free Software Foundation; either version 2 of the License, or
> > + * (at your option) any later version.
> > + */
> > +
> > +#include <linux/init.h>
> > +#include <linux/module.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/io.h>
> > +#include <linux/err.h>
> > +#include <linux/pinctrl/pinctrl.h>
> > +#include <linux/pinctrl/pinmux.h>
> > +
> > +#include "pinmux-imx-core.h"
> > +
> > +#define DRIVER_NAME "pinmux-imx"
> > +
> > +/**
> > + * @dev: a pointer back to containing device
> > + * @virtbase: the offset to the controller in virtual memory  */
> > +struct imx_pmx {
> > +	struct device *dev;
> > +	struct pinctrl_dev *pctl;
> > +	void __iomem *virtbase;
> > +	struct imx_pinctrl_info *info;
> > +};
> > +
> > +#define IMX_PINCTRL_REG_SIZE 4
> > +#define IMX_PINCTRL_MAX_FUNC 7
> > +
> > +extern struct imx_pinctrl_info mx53_pinctrl_info; extern struct
> > +imx_pinctrl_info mx6q_pinctrl_info;
> > +
> 
> You do not have mx53_pinctrl_info and mx6q_pinctrl_info in this patch yet.
> 
Yes, it's defined in another file in this patch series.
I just separate them for clear.
Maybe I should put them together in one patch or change sequence right?
BTW, if taking it from platform_data, I may not have this issue.

Regards
Dong Aisheng