linuxppc-dev.lists.ozlabs.org archive mirror
 help / color / mirror / Atom feed
* commit e38c0a1f breaks powerpc boards with uli1575 chip
@ 2013-12-17  7:35 Nikita Yushchenko
  2013-12-18 18:40 ` Rob Herring
  0 siblings, 1 reply; 6+ messages in thread
From: Nikita Yushchenko @ 2013-12-17  7:35 UTC (permalink / raw)
  To: Arnd Bergmann, Thierry Reding, Rob Herring, Grant Likely,
	devicetree-discuss, linuxppc-dev, Kumar Gala
  Cc: Alexey Lugovskoy, linux-kernel, Dmitry Krivoschekov

Hi

While trying to make freescale p2020ds and  mpc8572ds boards working with mainline kernel, I faced that commit 
e38c0a1f (Handle #address-cells > 2 specially) breaks things with these boards.

Both these boards have uli1575 chip.
Corresponding part in device tree is something like

                uli1575@0 {
                        reg = <0x0 0x0 0x0 0x0 0x0>;
                        #size-cells = <2>;
                        #address-cells = <3>;
                        ranges = <0x2000000 0x0 0x80000000
                                  0x2000000 0x0 0x80000000
                                  0x0 0x20000000

                                  0x1000000 0x0 0x0
                                  0x1000000 0x0 0x0
                                  0x0 0x10000>;
                        isa@1e {
...

I.e. it has #address-cells = <3>


With commit e38c0a1f reverted, devices under uli1575 are registered correctly, e.g. for rtc

OF: ** translation for device /pcie@ffe09000/pcie@0/uli1575@0/isa@1e/rtc@70 **
OF: bus is isa (na=2, ns=1) on /pcie@ffe09000/pcie@0/uli1575@0/isa@1e
OF: translating address: 00000001 00000070
OF: parent bus is default (na=3, ns=2) on /pcie@ffe09000/pcie@0/uli1575@0
OF: walking ranges...
OF: ISA map, cp=0, s=1000, da=70
OF: parent translation for: 01000000 00000000 00000000
OF: with offset: 70
OF: one level translation: 00000000 00000000 00000070
OF: parent bus is pci (na=3, ns=2) on /pcie@ffe09000/pcie@0
OF: walking ranges...
OF: default map, cp=a0000000, s=20000000, da=70
OF: default map, cp=0, s=10000, da=70
OF: parent translation for: 01000000 00000000 00000000
OF: with offset: 70
OF: one level translation: 01000000 00000000 00000070
OF: parent bus is pci (na=3, ns=2) on /pcie@ffe09000
OF: walking ranges...
OF: PCI map, cp=0, s=10000, da=70
OF: parent translation for: 01000000 00000000 00000000
OF: with offset: 70
OF: one level translation: 01000000 00000000 00000070
OF: parent bus is default (na=2, ns=2) on /
OF: walking ranges...
OF: PCI map, cp=0, s=10000, da=70
OF: parent translation for: 00000000 ffc10000
OF: with offset: 70
OF: one level translation: 00000000 ffc10070
OF: reached root node

With commit e38c0a1f in place, address translation fails:

OF: ** translation for device /pcie@ffe09000/pcie@0/uli1575@0/isa@1e/rtc@70 **
OF: bus is isa (na=2, ns=1) on /pcie@ffe09000/pcie@0/uli1575@0/isa@1e
OF: translating address: 00000001 00000070
OF: parent bus is default (na=3, ns=2) on /pcie@ffe09000/pcie@0/uli1575@0
OF: walking ranges...
OF: ISA map, cp=0, s=1000, da=70
OF: parent translation for: 01000000 00000000 00000000
OF: with offset: 70
OF: one level translation: 00000000 00000000 00000070
OF: parent bus is pci (na=3, ns=2) on /pcie@ffe09000/pcie@0
OF: walking ranges...
OF: default map, cp=a0000000, s=20000000, da=70
OF: default map, cp=0, s=10000, da=70
OF: not found !

Either e38c0a1f should be reverted, or uli1575 (and perhaps other similar devices) have to be described in device 
trees differently.

Could someone please comment on this?

^ permalink raw reply	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2014-01-03  0:04 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2013-12-17  7:35 commit e38c0a1f breaks powerpc boards with uli1575 chip Nikita Yushchenko
2013-12-18 18:40 ` Rob Herring
2013-12-19  4:42   ` Nikita Yushchenko
2013-12-30  3:13     ` Benjamin Herrenschmidt
2014-01-03  0:04       ` Scott Wood
2013-12-19 14:24   ` Thierry Reding

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).