On Tue, Aug 4, 2015 at 11:31 PM, Scott Wood <scottw...@freescale.com> wrote: > On Tue, 2015-08-04 at 23:26 +0300, Ran Shalit wrote: >> On Tue, Aug 4, 2015 at 9:54 PM, Scott Wood <scottw...@freescale.com> wrote: >> > On Tue, 2015-08-04 at 18:29 +0300, Ran Shalit wrote: >> > > Hello, >> > > >> > > I would please like to ask if describing flash nor used with GPMC, >> > > whould be done as described in: >> > > https://www.kernel.org/doc/Documentation/devicetree/bindings/mtd/gpmc-nor.txt >> > > It is described in the above link as "TI's GPMC", so I'm not sure if >> > > it is relevent for powerpc too. >> > >> > That binding is for TI GPMC. >> > >> > Are you saying you have some PPC chip that has a flash controller called >> > GPMC? >> > >> > -Scott >> > >> >> Hi Scott, >> >> Thanks, I've worked with TI's chips, so I now understand that I made >> here some confusion... >> It is GPCM , not GPMC, my mistake. >> We already configured it in u-boot, but on doing read/write from >> kernel it doesn not work. >> It seems that for the linux to use the correct driver, we need to >> define the nor in the device tree. >> Is there any example how to define nor GPCM in device tree ? Is it >> possible not to override the existing GPCM configuration ? > > Pretty much all of the mpc8xxx/qoriq device trees have GPCM NOR defined. See > Documentation/devicetree/bindings/powerpc/fsl/lbc.txt and examples such as > arch/powerpc/boot/dts/p4080ds.dts (part of the lbc node is in > arch/powerpc/boot/dts/fsl/p4080si-post.dtsi). > > Linux will not change the GPCM configuration. > > -Scott >
On more thing, if I may. The localbus is also connected to nvram & cpld. I've noticed that read/write works well, even though I didn't define anything in device tree. Is there any reasom to add these devices into device tree, or can we use the cpld and nvram without the definition in device tree ? Thanks, Ran _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
