linux-toradex.git/arch/powerpc/boot, branch v3.4.73 Linux kernel for Apalis and Colibri modules powerpc/85xx: use the BRx registers to enable indirect mode on the P1022DS 2012-08-09T15:31:27+00:00 Timur Tabi timur@freescale.com 2012-07-05T15:08:28+00:00 753e14ef13311122aa5a819657d17940969a6f80 commit 6bd825f02966be8ba544047cab313d6032c23819 upstream. In order to enable the DIU video controller on the P1022DS, the FPGA needs to be switched to "indirect mode", where the localbus is disabled and the FPGA is accessed via writes to localbus chip select signals CS0 and CS1. To obtain the address of CS0 and CS1, the platform driver uses an "indirect pixis mode" device tree node. This node assumes that the localbus 'ranges' property is sorted in chip-select order. That is, reg value 0 maps to CS0, reg value 1 maps to CS1, etc. This is how the 'ranges' property is supposed to be arranged. Unfortunately, the 'ranges' property is often mis-arranged, and not just on the P1022DS. Linux normally does not care, since it does not program the localbus. But the indirect-mode code on the P1022DS does care. The "proper" fix is to have U-Boot fix the 'ranges' property, but this would be too cumbersome. The names and 'reg' properties of all the localbus devices would also need to be updated, and determining which localbus device maps to which chip select is board-specific. Instead, we determine the CS0/CS1 base addresses the same way that U-boot does -- by reading the BRx registers directly and mapping them to physical addresses. This code is simpler and more reliable, and it does not require a U-boot or device tree change. Since the indirect pixis device tree node is no longer needed, the node is deleted from the DTS. Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 6bd825f02966be8ba544047cab313d6032c23819 upstream.

In order to enable the DIU video controller on the P1022DS, the FPGA needs
to be switched to "indirect mode", where the localbus is disabled and
the FPGA is accessed via writes to localbus chip select signals CS0 and CS1.

To obtain the address of CS0 and CS1, the platform driver uses an "indirect
pixis mode" device tree node.  This node assumes that the localbus 'ranges'
property is sorted in chip-select order.  That is, reg value 0 maps to
CS0, reg value 1 maps to CS1, etc.  This is how the 'ranges' property is
supposed to be arranged.

Unfortunately, the 'ranges' property is often mis-arranged, and not just on
the P1022DS.  Linux normally does not care, since it does not program the
localbus.  But the indirect-mode code on the P1022DS does care.

The "proper" fix is to have U-Boot fix the 'ranges' property, but this would
be too cumbersome.  The names and 'reg' properties of all the localbus
devices would also need to be updated, and determining which localbus device
maps to which chip select is board-specific.

Instead, we determine the CS0/CS1 base addresses the same way that U-boot
does -- by reading the BRx registers directly and mapping them to physical
addresses.  This code is simpler and more reliable, and it does not require
a U-boot or device tree change.

Since the indirect pixis device tree node is no longer needed, the node is
deleted from the DTS.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
powerpc/mpc85xx: add MPIC message dts node 2012-04-19T20:10:08+00:00 Mingkai Hu Mingkai.hu@freescale.com 2012-04-16T02:05:08+00:00 4351f30a35b8c6a6b6d4d36e5c2dc8ec0262b2ca Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> 
Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
powerpc/dts: Removed fsl,msi property from dts. 2012-03-29T13:14:15+00:00 Diana CRACIUN Diana.Craciun@freescale.com 2012-02-09T13:41:00+00:00 8a57d734004b8018f3d320455c1816b1e6810265 The association in the decice tree between PCI and MSI using fsl,msi property was an artificial one and it does not reflect the actual hardware. Signed-off-by: Diana CRACIUN <Diana.Craciun@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> 
The association in the decice tree between PCI and MSI
using fsl,msi property was an artificial one and it does
not reflect the actual hardware.

Signed-off-by: Diana CRACIUN <Diana.Craciun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
powerpc/85xx: add the P1020UTM-PC DTS support 2012-03-29T13:14:11+00:00 Jerry Huang Chang-Ming.Huang@freescale.com 2012-03-20T06:24:45+00:00 2fc1fc0338d568723b32e2d7a79b644f6137fd00 Signed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> 
Signed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
powerpc/85xx: add the P1020MBG-PC DTS support 2012-03-29T13:14:09+00:00 Jerry Huang Chang-Ming.Huang@freescale.com 2012-03-20T06:24:44+00:00 72ea4d48863679911330f977144b2b2bd62dd92a Signed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> 
Signed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
powerpc: Random little legacy iSeries removal tidy ups 2012-03-28T00:33:23+00:00 Stephen Rothwell sfr@canb.auug.org.au 2012-03-21T18:23:27+00:00 1d9a47315042606b4217691bcea36cfa6ccbde66 Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> 
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2012-03-22T01:55:10+00:00 Linus Torvalds torvalds@linux-foundation.org 2012-03-22T01:55:10+00:00 5375871d432ae9fc581014ac117b96aaee3cd0c7 Pull powerpc merge from Benjamin Herrenschmidt: "Here's the powerpc batch for this merge window. It is going to be a bit more nasty than usual as in touching things outside of arch/powerpc mostly due to the big iSeriesectomy :-) We finally got rid of the bugger (legacy iSeries support) which was a PITA to maintain and that nobody really used anymore. Here are some of the highlights: - Legacy iSeries is gone. Thanks Stephen ! There's still some bits and pieces remaining if you do a grep -ir series arch/powerpc but they are harmless and will be removed in the next few weeks hopefully. - The 'fadump' functionality (Firmware Assisted Dump) replaces the previous (equivalent) "pHyp assisted dump"... it's a rewrite of a mechanism to get the hypervisor to do crash dumps on pSeries, the new implementation hopefully being much more reliable. Thanks Mahesh Salgaonkar. - The "EEH" code (pSeries PCI error handling & recovery) got a big spring cleaning, motivated by the need to be able to implement a new backend for it on top of some new different type of firwmare. The work isn't complete yet, but a good chunk of the cleanups is there. Note that this adds a field to struct device_node which is not very nice and which Grant objects to. I will have a patch soon that moves that to a powerpc private data structure (hopefully before rc1) and we'll improve things further later on (hopefully getting rid of the need for that pointer completely). Thanks Gavin Shan. - I dug into our exception & interrupt handling code to improve the way we do lazy interrupt handling (and make it work properly with "edge" triggered interrupt sources), and while at it found & fixed a wagon of issues in those areas, including adding support for page fault retry & fatal signals on page faults. - Your usual random batch of small fixes & updates, including a bunch of new embedded boards, both Freescale and APM based ones, etc..." I fixed up some conflicts with the generalized irq-domain changes from Grant Likely, hopefully correctly. * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (141 commits) powerpc/ps3: Do not adjust the wrapper load address powerpc: Remove the rest of the legacy iSeries include files powerpc: Remove the remaining CONFIG_PPC_ISERIES pieces init: Remove CONFIG_PPC_ISERIES powerpc: Remove FW_FEATURE ISERIES from arch code tty/hvc_vio: FW_FEATURE_ISERIES is no longer selectable powerpc/spufs: Fix double unlocks powerpc/5200: convert mpc5200 to use of_platform_populate() powerpc/mpc5200: add options to mpc5200_defconfig powerpc/mpc52xx: add a4m072 board support powerpc/mpc5200: update mpc5200_defconfig to fit for charon board Documentation/powerpc/mpc52xx.txt: Checkpatch cleanup powerpc/44x: Add additional device support for APM821xx SoC and Bluestone board powerpc/44x: Add support PCI-E for APM821xx SoC and Bluestone board MAINTAINERS: Update PowerPC 4xx tree powerpc/44x: The bug fixed support for APM821xx SoC and Bluestone board powerpc: document the FSL MPIC message register binding powerpc: add support for MPIC message register API powerpc/fsl: Added aliased MSIIR register address to MSI node in dts powerpc/85xx: mpc8548cds - add 36-bit dts ... 
Pull powerpc merge from Benjamin Herrenschmidt:
 "Here's the powerpc batch for this merge window.  It is going to be a
  bit more nasty than usual as in touching things outside of
  arch/powerpc mostly due to the big iSeriesectomy :-) We finally got
  rid of the bugger (legacy iSeries support) which was a PITA to
  maintain and that nobody really used anymore.

  Here are some of the highlights:

   - Legacy iSeries is gone.  Thanks Stephen ! There's still some bits
     and pieces remaining if you do a grep -ir series arch/powerpc but
     they are harmless and will be removed in the next few weeks
     hopefully.

   - The 'fadump' functionality (Firmware Assisted Dump) replaces the
     previous (equivalent) "pHyp assisted dump"...  it's a rewrite of a
     mechanism to get the hypervisor to do crash dumps on pSeries, the
     new implementation hopefully being much more reliable.  Thanks
     Mahesh Salgaonkar.

   - The "EEH" code (pSeries PCI error handling & recovery) got a big
     spring cleaning, motivated by the need to be able to implement a
     new backend for it on top of some new different type of firwmare.

     The work isn't complete yet, but a good chunk of the cleanups is
     there.  Note that this adds a field to struct device_node which is
     not very nice and which Grant objects to.  I will have a patch soon
     that moves that to a powerpc private data structure (hopefully
     before rc1) and we'll improve things further later on (hopefully
     getting rid of the need for that pointer completely).  Thanks Gavin
     Shan.

   - I dug into our exception & interrupt handling code to improve the
     way we do lazy interrupt handling (and make it work properly with
     "edge" triggered interrupt sources), and while at it found & fixed
     a wagon of issues in those areas, including adding support for page
     fault retry & fatal signals on page faults.

   - Your usual random batch of small fixes & updates, including a bunch
     of new embedded boards, both Freescale and APM based ones, etc..."

I fixed up some conflicts with the generalized irq-domain changes from
Grant Likely, hopefully correctly.

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (141 commits)
  powerpc/ps3: Do not adjust the wrapper load address
  powerpc: Remove the rest of the legacy iSeries include files
  powerpc: Remove the remaining CONFIG_PPC_ISERIES pieces
  init: Remove CONFIG_PPC_ISERIES
  powerpc: Remove FW_FEATURE ISERIES from arch code
  tty/hvc_vio: FW_FEATURE_ISERIES is no longer selectable
  powerpc/spufs: Fix double unlocks
  powerpc/5200: convert mpc5200 to use of_platform_populate()
  powerpc/mpc5200: add options to mpc5200_defconfig
  powerpc/mpc52xx: add a4m072 board support
  powerpc/mpc5200: update mpc5200_defconfig to fit for charon board
  Documentation/powerpc/mpc52xx.txt: Checkpatch cleanup
  powerpc/44x: Add additional device support for APM821xx SoC and Bluestone board
  powerpc/44x: Add support PCI-E for APM821xx SoC and Bluestone board
  MAINTAINERS: Update PowerPC 4xx tree
  powerpc/44x: The bug fixed support for APM821xx SoC and Bluestone board
  powerpc: document the FSL MPIC message register binding
  powerpc: add support for MPIC message register API
  powerpc/fsl: Added aliased MSIIR register address to MSI node in dts
  powerpc/85xx: mpc8548cds - add 36-bit dts
  ...
powerpc/ps3: Do not adjust the wrapper load address 2012-03-21T00:16:13+00:00 Stephen Rothwell sfr@canb.auug.org.au 2012-03-20T03:13:51+00:00 dfbc2d75c1bd47c3186fa91f1655ea2f3825b0ec Commit c55aef0e5bc6 "powerpc/boot: Change the load address for the wrapper to fit the kernel" adjusted the laod address if the uncompressed kernel was too large. Ps3 does not compress the kernel and uses a different linker script, so do not adjust the load address in that case. fixes this build error: powerpc64-linux-ld: section .text loaded at [0000000000e00000,0000000000e0721b] overlaps section .kernel:dtb loaded at [0000000000e00000,0000000000e0066f] Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> 
Commit c55aef0e5bc6 "powerpc/boot: Change the load address for the wrapper
to fit the kernel" adjusted the laod address if the uncompressed kernel
was too large.  Ps3 does not compress the kernel and uses a different
linker script, so do not adjust the load address in that case.

fixes this build error:

powerpc64-linux-ld: section .text loaded at [0000000000e00000,0000000000e0721b] overlaps section .kernel:dtb loaded at [0000000000e00000,0000000000e0066f]

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc: Remove the remaining CONFIG_PPC_ISERIES pieces 2012-03-21T00:16:12+00:00 Stephen Rothwell sfr@canb.auug.org.au 2012-03-15T18:20:13+00:00 1b041885ae1d9938440fc2cf6a444b70ec0a86c9 Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> 
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Merge remote-tracking branch 'kumar/next' into next 2012-03-20T23:56:04+00:00 Benjamin Herrenschmidt benh@kernel.crashing.org 2012-03-20T23:56:04+00:00 4286f84ef6d7f44de1e70b904706bdc3e1f7af01