linux-kernel - Re: [PATCH v3 2/4] pinctrl: pinctrl-imx: add imx pinctrl core driver

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Date:	Fri, 27 Apr 2012 19:24:57 +0800
From:	Dong Aisheng <aisheng.dong@...escale.com>
To:	Shawn Guo <shawn.guo@...aro.org>
CC:	Dong Aisheng-B29396 <B29396@...escale.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"linus.walleij@...ricsson.com" <linus.walleij@...ricsson.com>,
	"swarren@...dotorg.org" <swarren@...dotorg.org>,
	"s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
	Guo Shawn-R65073 <r65073@...escale.com>,
	"kernel@...gutronix.de" <kernel@...gutronix.de>,
	"grant.likely@...retlab.ca" <grant.likely@...retlab.ca>,
	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	"cjb@...top.org" <cjb@...top.org>,
	Zhao Richard-B20223 <B20223@...escale.com>
Subject: Re: [PATCH v3 2/4] pinctrl: pinctrl-imx: add imx pinctrl core
 driver

On Fri, Apr 27, 2012 at 04:54:05PM +0800, Shawn Guo wrote:
> On Thu, Apr 26, 2012 at 10:40:25PM +0800, Dong Aisheng wrote:
> > +/**
> > + * struct imx_pin_reg - describe a pin reg map
> > + * The last 3 members are used for select input setting
> > + * @pid: pin id
> > + * @mux_reg: mux register offset
> > + * @conf_reg: config register offset
> > + * @mux_mode: mux mode
> > + * @input_reg: select input register offset for this mux if any
> > + *  0 if no select input setting needed.
> > + * @input_val: the value set to select input register
> > + */
> > +struct imx_pin_reg {
> > +	unsigned int pid;
> > +	unsigned int mux_reg;
> > +	unsigned int conf_reg;
> > +	unsigned int mux_mode;
> > +	unsigned int input_reg;
> > +	unsigned int input_val;
> > +};
> 
> Since the array of this struct is big, I would suggest define the type
> of the members as size-efficient as possible, for example, u16 is enough
> for pid, and reg offset, while u8 is enough for mux_mode?
> 
Yes, reasonable.
Will change to that in v4.

Regards
Dong Aisheng

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