[PATCH v4] bus: imx-weim: support CS GPR configuration

[Philippe De Muyter]

On Sun, Feb 16, 2014 at 10:31:16PM +0800, Shawn Guo wrote:
> On Sun, Feb 16, 2014 at 06:22:44PM +0400, Alexander Shiyan wrote:
> > Воскресенье, 16 февраля 2014, 22:03 +08:00 от Shawn Guo <shawn.guo at linaro.org>:
> > > For imx50-weim and imx6q-weim type of devices, there might a WEIM CS
> > > space configuration register in General Purpose Register controller,
> > > e.g. IOMUXC_GPR1 on i.MX6Q.
> > ...
> > > +static int __init imx_weim_gpr_setup(struct platform_device *pdev)
> > > +{
> > > +	struct device_node *np = pdev->dev.of_node;
> > > +	struct property *prop;
> > > +	const __be32 *p;
> > > +	struct regmap *gpr;
> > > +	u32 gprvals[4] = {
> > > +		05,	/* CS0(128M) CS1(0M)  CS2(0M)  CS3(0M) */
> > > +		033,	/* CS0(64M)  CS1(64M) CS2(0M)  CS3(0M) */
> > > +		0113,	/* CS0(64M)  CS1(32M) CS2(32M) CS3(0M) */
> > > +		01111,	/* CS0(64M)  CS1(32M) CS2(32M) CS3(0M) */
> > > +	};
> > > +	u32 gprval = 0;
> > > +	u32 val;
> > > +	int cs = 0;
> > > +	int i = 0;
> > > +
> > > +	gpr = syscon_regmap_lookup_by_phandle(np, "fsl,weim-cs-gpr");
> > > +	if (IS_ERR(gpr)) {
> > > +		dev_dbg(&pdev->dev, "failed to find weim-cs-gpr\n");
> > > +		return 0;
> > 
> > Only one comment:
> > You do not use these error codes in the probe(),
> > so let's declare this function as void.
> 
> Oh, yes.  I should check return of imx_weim_gpr_setup() in probe().
> Will add in the next version.

Well, as all the error cases are already covered by error messages, there is
no added value in testing that again in probe().  As Alexander wrote, you can
declare imx_weim_gpr_setup() as 'void'.

Philippe

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Philippe De Muyter +32 2 6101532 Macq SA rue de l'Aeronef 2 B-1140 Bruxelles