[U-Boot] [PATCH 6/7] arm: mvebu: helios4: Enable SPI flash support

[Baruch Siach]

Hi Dennis,

On Wed, Nov 28, 2018 at 07:53:44AM -0600, Dennis Gilmore wrote:
> On Wed, 2018-11-28 at 17:00 +0800, Aditya Prayoga wrote:
> > Enable SPI flash support under U-Boot and SPL. The ENV size and
> > offset,
> > ported from U-Boot 2013.01 Marvell version: 2015_T1.0p16
> > 
> > To create U-Boot image for SPI flash, user would need to replace
> > * CONFIG_MVEBU_SPL_BOOT_DEVICE_MMC with
> > CONFIG_MVEBU_SPL_BOOT_DEVICE_SPI
> > * CONFIG_ENV_IS_IN_MMC with CONFIG_ENV_IS_IN_SPI_FLASH
> > 
> > Signed-off-by: Aditya Prayoga <aditya at kobol.io>
> > ---
> >  arch/arm/dts/armada-388-helios4.dts |  7 +++++++
> >  configs/helios4_defconfig           |  1 -
> >  include/configs/helios4.h           | 31
> > +++++++++++++++++++++++++++++++
> >  3 files changed, 38 insertions(+), 1 deletion(-)
> > 
> > diff --git a/arch/arm/dts/armada-388-helios4.dts
> > b/arch/arm/dts/armada-388-helios4.dts
> > index 711fc22..cd3fcae 100644
> > --- a/arch/arm/dts/armada-388-helios4.dts
> > +++ b/arch/arm/dts/armada-388-helios4.dts
> > @@ -26,6 +26,7 @@
> >  		ethernet1 = &eth0;
> >  		i2c0 = &i2c0;
> >  		i2c1 = &i2c1;
> > +		spi1 = &spi1;
> has this gone upstream to the kernel?
> >  	};
> >  
> >  	chosen {
> > @@ -244,6 +245,7 @@
> >  					     &microsom_spi1_cs_pins>;
> >  				pinctrl-names = "default";
> >  				status = "okay";
> > +				u-boot,dm-spl;
> there is a method in u-boot that needs to be used where u-boot specific
> snippets go into a <dtb file nane>-u-boot.dts file, I am struggling to
> find the documentation on it, perhaps someone else can point us both at
> it.

See tools/binman/README under "Automatic .dtsi inclusion".

Would have been nice to be able to add u-boot.dtsi onto another .dtsi. That 
would have saved us from copying the content of 
armada-388-clearfog-u-boot.dtsi over and over for each board that carries the 
same SOM. Maybe we can use a symlink for that? It's a little less ugly than 
copy.

baruch

> >  			};
> >  
> >  			sdhci at d8000 {
> > @@ -308,3 +310,8 @@
> >  		};
> >  	};
> >  };
> > +
> > +&w25q32 {
> > +	status = "okay";
> > +	u-boot,dm-spl;
> > +};
> same as above the u-boot bit should go in a armada-388-helios4-u-
> boot.dts file and the generic bits in the upstream kernel dts file.
> 
> Dennis

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