VBUS and overcurrent GPIO init missing in IGEPv2 board

SRU Justification:

Impact: This patch is part of a series of fix for the IGEPv2. The board features multiple GPIOs that must be initialized in order for signals to be considered by the processor.

Fix: GPIOs for VBUS and over current are requested and their direction set in the GPIO setup routine, part of the initial initialization of the board.

Testcase: Booting the board without the fix will see input and outputs from the external VBUS power switch and over current ignored.

Accepted linux-linaro into maverick-proposed, the package will build now and be available in a few hours. Please test and give feedback here. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

Accepted linux into maverick-proposed, the package will build now and be available in a few hours. Please test and give feedback here. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed' to 'verification-done'.

If verification is not done by Thursday, November 11, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

This bug was fixed in the package linux-linaro - 2.6.35-1008.15

---------------
linux-linaro (2.6.35-1008.15) maverick-proposed; urgency=low

  [ Robert Nelson ]

  * SRU: Fix DVI for Beagle xM rev A3
    - LP: #663642

linux-linaro (2.6.35-1008.14) maverick-proposed; urgency=low

  [ Andy Whitcroft ]

  * reduce disk usage during buildd builds
    - LP: #645653

  [ Enric Balletbo i Serra ]

  * ARM: igepv2: Adding support for VBUS and overcurrent
    - LP: #651589
  * ARM: igepv2: Fix and improve LED handling
    - LP: #654582
  * ARM: igepv2: Introduce function to dectect HW version
    - LP: #654586
  * ARM: igepv2: Fix handling of GPIOs for WLAN-BT combo
    - LP: #654590
  * ARM: igepv2: Add i2c eeprom driver to read EDID
    - LP: #654594
  * ARM: igepv2: Remove VMMC2 regulator
    - LP: #654595

  [ Maurus Cuelenaere ]

  * SAUCE: ARM: OMAP3: Add S-Video output to IGEPv2 board
    - LP: #607250

  [ Upstream Stable ]
  * Linux 2.6.35.7

  [ Upstream MMC updates ]

  * mmc: recognize CSD structure
  * mmc: split mmc_sd_init_card()
  * mmc: implement SD-combo (IO+mem) support
  * sdhci: remove useless set_clock() check
  * sdhci: 8-bit data transfer width support
  * sdhci: don't assign mmc->caps at SDHCI directly
  * mmc: only set blockaddressed for > 2GiB cards
  * mmc: omap: fix for bus width which improves SD card's peformance.
  * sdhci-pltfm: switch to module device table matching
  * sdhci-pltfm: reorganize Makefile entries to support SoC devices
  * sdhci-pltfm: add support for CNS3xxx SoC devices
  * omap hsmmc: fix processing of all dma interrupts as block completion
  * sdhci: add regulator support
  * sdhci: add no hi-speed bit quirk support
  * mmc: avoid getting CID on SDIO-only cards
  * omap_hsmmc: remove unused local `state'
  * omap hsmmc: fix a racing case between kmmcd and omap_hsmmc_suspend
  * drivers/mmc/host/imxmmc.c: adjust confusing if indentation
  * mmc: sdhci-pltfm: Add structure for host-specific data
  * mmc: sdhci-pltfm: move .h file into appropriate subdir
  * mmc: sdhci: introduce get_ro private write-protect hook
  * mmc: sdhci_pltfm: pass more data on custom init call
  * mmc: sdhci-of-esdhc: factor out common stuff
  * mmc: sdhci-pltfm: add -pltfm driver for imx35/51
  * mmc: quirk fix for timeout problem
  * babbage: esdhc device registration
  * babbage: update mx51_defconfig
    - LP: #656966

  [ Upstream ARM fixes ]

  * Make PTRACE_SINGLESTEP work with user helpers
  * ARM: fix section mismatch warnings in Versatile Express
  * ARM: use memblock to remove memory from available memory
  * video: omap: vram: remove from normal memory
    - LP: #627779

  [ John Rigby ]
  * LINARO: update configs
    - LP: #659799

linux-linaro (2.6.35-1007.13) maverick; urgency=low

  [ Upstream Ubuntu ]

  * Ubuntu-2.6.35-22.33
  * Ubuntu-2.6.35-22.34

  [ Upstream ARM Fixes ]

  * ARM: vexpress: set RAM latencies to 1 cycle for PL310 on ct-ca9x4 tile
  * ARM: vexpress: set RAM latencies to 1 cycle for PL310 on ct-ca9x4 tile
  * ARM: add a vma entry for the user accessible vector page
  * ARM: plug a race with the alignment trap handler
  * arm: fix really nasty sigreturn bug
  * ARM: prevent multiple syscall ...

Tested on

ubuntu@ubuntu:~$ uname -a
Linux ubuntu 2.6.35-1008-linaro-omap #15-Ubuntu Fri Oct 22 11:56:29
UTC 2010 armv7l GNU/Linux

2010/11/8 Launchpad Bug Tracker <email address hidden>:
> This bug was fixed in the package linux-linaro - 2.6.35-1008.15
>
> ---------------
> linux-linaro (2.6.35-1008.15) maverick-proposed; urgency=low
>
>  [ Robert Nelson ]
>
>  * SRU: Fix DVI for Beagle xM rev A3
>    - LP: #663642
>
> linux-linaro (2.6.35-1008.14) maverick-proposed; urgency=low
>
>  [ Andy Whitcroft ]
>
>  * reduce disk usage during buildd builds
>    - LP: #645653
>
>  [ Enric Balletbo i Serra ]
>
>  * ARM: igepv2: Adding support for VBUS and overcurrent
>    - LP: #651589
>  * ARM: igepv2: Fix and improve LED handling
>    - LP: #654582
>  * ARM: igepv2: Introduce function to dectect HW version
>    - LP: #654586
>  * ARM: igepv2: Fix handling of GPIOs for WLAN-BT combo
>    - LP: #654590
>  * ARM: igepv2: Add i2c eeprom driver to read EDID
>    - LP: #654594
>  * ARM: igepv2: Remove VMMC2 regulator
>    - LP: #654595
>
>  [ Maurus Cuelenaere ]
>
>  * SAUCE: ARM: OMAP3: Add S-Video output to IGEPv2 board
>    - LP: #607250
>
>  [ Upstream Stable ]
>  * Linux 2.6.35.7
>
>  [ Upstream MMC updates ]
>
>  * mmc: recognize CSD structure
>  * mmc: split mmc_sd_init_card()
>  * mmc: implement SD-combo (IO+mem) support
>  * sdhci: remove useless set_clock() check
>  * sdhci: 8-bit data transfer width support
>  * sdhci: don't assign mmc->caps at SDHCI directly
>  * mmc: only set blockaddressed for > 2GiB cards
>  * mmc: omap: fix for bus width which improves SD card's peformance.
>  * sdhci-pltfm: switch to module device table matching
>  * sdhci-pltfm: reorganize Makefile entries to support SoC devices
>  * sdhci-pltfm: add support for CNS3xxx SoC devices
>  * omap hsmmc: fix processing of all dma interrupts as block completion
>  * sdhci: add regulator support
>  * sdhci: add no hi-speed bit quirk support
>  * mmc: avoid getting CID on SDIO-only cards
>  * omap_hsmmc: remove unused local `state'
>  * omap hsmmc: fix a racing case between kmmcd and omap_hsmmc_suspend
>  * drivers/mmc/host/imxmmc.c: adjust confusing if indentation
>  * mmc: sdhci-pltfm: Add structure for host-specific data
>  * mmc: sdhci-pltfm: move .h file into appropriate subdir
>  * mmc: sdhci: introduce get_ro private write-protect hook
>  * mmc: sdhci_pltfm: pass more data on custom init call
>  * mmc: sdhci-of-esdhc: factor out common stuff
>  * mmc: sdhci-pltfm: add -pltfm driver for imx35/51
>  * mmc: quirk fix for timeout problem
>  * babbage: esdhc device registration
>  * babbage: update mx51_defconfig
>    - LP: #656966
>
>
>  [ Upstream ARM fixes ]
>
>  * Make PTRACE_SINGLESTEP work with user helpers
>  * ARM: fix section mismatch warnings in Versatile Express
>  * ARM: use memblock to remove memory from available memory
>  * video: omap: vram: remove from normal memory
>    - LP: #627779
>
>  [ John Rigby ]
>  * LINARO: update configs
>    - LP: #659799
>
> linux-linaro (2.6.35-1007.13) maverick; urgency=low
>
>  [ Upstream Ubuntu ]
>
>  * Ubuntu-2.6.35-22.33
>  * Ubuntu-2.6.35-22.34
>
>  [ Upstream ARM Fixes ]
>
>  * ARM: vexpress: set RAM latencies to 1 cyc...

attempting to verify this bug....which GPIOs are being initialized before they are considered by the processor? Is the fix going down the line and initializing all? What is the problem seen before applying this patch?

Also tested with 2.6.35-23-omap

Test environment:
Linux ubuntu 2.6.35-23-omap #37-Ubuntu Sat Nov 6 02:01:12 UTC 2010
armv7l GNU/Linux
ubuntu@ubuntu:~$ cat /proc/version
Linux version 2.6.35-23-omap (buildd@gourd) (gcc version 4.4.5
(Ubuntu/Linaro 4.4.4-14ubuntu5) ) #37-Ubuntu Sat Nov 6 02:01:12 UTC
2010

Test case 1 : Check GPIO's configuration
        ubuntu@ubuntu:~$ cat /sys/kernel/debug/gpio | grep GPIO_EHCI_NOC
        gpio-193 (GPIO_EHCI_NOC ) in lo
        ubuntu@ubuntu:~$ cat /sys/kernel/debug/gpio | grep GPIO_USBH_CPEN
        gpio-210 (GPIO_USBH_CPEN ) out hi

  - Result: PASS, GPIO_EHCI_NOC is configured as input and
GPIO_USBH_CPEN is configured as output.

Note : Seems ehci-omap driver needs some hooks for external VBUS power
switch and overcurrent detect, these GPIOs are missing from the board
initialitzation, if this is not solved the inputs/outputs from these
two sources are ignored.

2010/11/10 Torez Smith <email address hidden>:
> attempting to verify this bug....which GPIOs are being initialized
> before they are considered by the processor? Is the fix going down the
> line and initializing all?  What is the problem seen before applying
> this patch?
>
> --
> VBUS and overcurrent GPIO init missing in IGEPv2 board
> https://bugs.launchpad.net/bugs/651589
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “linux-linaro” package in Ubuntu: Confirmed
> Status in “linux-linaro” source package in Maverick: Fix Released
>
> Bug description:
> GPIO's for external VBUS power switch and overcurrent detect on IGEP v2 board are missing.
>
> To unsubscribe from this bug, go to:
> https://bugs.launchpad.net/ubuntu/+source/linux-linaro/+bug/651589/+subscribe
>

Someone from the OMAP landing team or the Kernel working group needs to check status for linux-linaro-omap for natty.

This has been fixed for sometime but not verified by someone with igep hw.