[PATCH] ARM: imx: Improve the soc revision calculation flow

[shawnguo@kernel.org (Shawn Guo)]

On Fri, Jan 26, 2018 at 07:59:46AM +0000, A.s. Dong wrote:
> > @@ -127,45 +130,26 @@ void __init imx_init_revision_from_anatop(void)
> >  	digprog = readl_relaxed(anatop_base + offset);
> >  	iounmap(anatop_base);
> > 
> > -	switch (digprog & 0xff) {
> > -	case 0:
> > -		/*
> > -		 * For i.MX6QP, most of the code for i.MX6Q can be resued,
> > -		 * so internally, we identify it as i.MX6Q Rev 2.0
> > -		 */
> > -		if (digprog >> 8 & 0x01)
> > -			revision = IMX_CHIP_REVISION_2_0;
> > -		else
> > -			revision = IMX_CHIP_REVISION_1_0;
> > -		break;
> > -	case 1:
> > -		revision = IMX_CHIP_REVISION_1_1;
> > -		break;
> > -	case 2:
> > -		revision = IMX_CHIP_REVISION_1_2;
> > -		break;
> > -	case 3:
> > -		revision = IMX_CHIP_REVISION_1_3;
> > -		break;
> > -	case 4:
> > -		revision = IMX_CHIP_REVISION_1_4;
> > -		break;
> > -	case 5:
> > -		/*
> > -		 * i.MX6DQ TO1.5 is defined as Rev 1.3 in Data Sheet, marked
> > -		 * as 'D' in Part Number last character.
> > -		 */
> > -		revision = IMX_CHIP_REVISION_1_5;
> > -		break;
> > -	default:
> > -		/*
> > -		 * Fail back to return raw register value instead of 0xff.
> > -		 * It will be easy to know version information in SOC if it
> > -		 * can't be recognized by known version. And some chip's
> > (i.MX7D)
> > -		 * digprog value match linux version format, so it needn't map
> > -		 * again and we can use register value directly.
> > +	/*
> > +	 * On i.MX7D digprog value match linux version format, so
> > +	 * it needn't map again and we can use register value directly.
> > +	 */
> > +	if (of_device_is_compatible(np, "fsl,imx7d-anatop")) {
> > +		revision = digprog & 0xff;
> > +	} else {
> > +
> > +		/* MAJOR: [15:8], the major silicon revison;
> > +		 * MINOR: [7: 0], the minor silicon revison;
> > +		 *
> > +		 * please refer to the i.MX RM for the detailed
> > +		 * silicon revison bit define.
> > +		 * format the major part and minor part to match the
> > +		 * linux kernel soc version format.
> >  		 */
> >  		revision = digprog & 0xff;
> 
> Unneeded line?

+1

Shawn