This implementation is based on the pxamci.c driver and it will
be used to support the mx31_3ds machine.
Signed-off-by: Alberto Panizzo <maramaopercheseimorto@gmail.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
Implement an sdhci-pltfm driver for the controller found in the
Marvell Dove SoC.
Signed-off-by: Mike Rapoport <mike@compulab.co.il>
CC: Saeed Bishara <saeed@marvell.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
* 'for-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: (33 commits)
usb: don't use flush_scheduled_work()
speedtch: don't abuse struct delayed_work
media/video: don't use flush_scheduled_work()
media/video: explicitly flush request_module work
ioc4: use static work_struct for ioc4_load_modules()
init: don't call flush_scheduled_work() from do_initcalls()
s390: don't use flush_scheduled_work()
rtc: don't use flush_scheduled_work()
mmc: update workqueue usages
mfd: update workqueue usages
dvb: don't use flush_scheduled_work()
leds-wm8350: don't use flush_scheduled_work()
mISDN: don't use flush_scheduled_work()
macintosh/ams: don't use flush_scheduled_work()
vmwgfx: don't use flush_scheduled_work()
tpm: don't use flush_scheduled_work()
sonypi: don't use flush_scheduled_work()
hvsi: don't use flush_scheduled_work()
xen: don't use flush_scheduled_work()
gdrom: don't use flush_scheduled_work()
...
Fixed up trivial conflict in drivers/media/video/bt8xx/bttv-input.c
as per Tejun.
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (416 commits)
ARM: DMA: add support for DMA debugging
ARM: PL011: add DMA burst threshold support for ST variants
ARM: PL011: Add support for transmit DMA
ARM: PL011: Ensure IRQs are disabled in UART interrupt handler
ARM: PL011: Separate hardware FIFO size from TTY FIFO size
ARM: PL011: Allow better handling of vendor data
ARM: PL011: Ensure error flags are clear at startup
ARM: PL011: include revision number in boot-time port printk
ARM: vexpress: add sched_clock() for Versatile Express
ARM i.MX53: Make MX53 EVK bootable
ARM i.MX53: Some bug fix about MX53 MSL code
ARM: 6607/1: sa1100: Update platform device registration
ARM: 6606/1: sa1100: Fix platform device registration
ARM i.MX51: rename IPU irqs
ARM i.MX51: Add ipu clock support
ARM: imx/mx27_3ds: Add PMIC support
ARM: DMA: Replace page_to_dma()/dma_to_page() with pfn_to_dma()/dma_to_pfn()
mx51: fix usb clock support
MX51: Add support for usb host 2
arch/arm/plat-mxc/ehci.c: fix errors/typos
...
* 'for-linus' of git://codeaurora.org/quic/kernel/davidb/linux-msm: (35 commits)
mmc: msm_sdcc: Check for only DATA_END interrupt to end a request
mmc: msm_sdcc: Fix bug in PIO mode when data size is not word aligned
mmc: msm_sdcc: Reset SDCC in case of data transfer errors
mmc: msm_sdcc: Add prog done interrupt support
mmc: msm_sdcc: Fix possible circular locking dependency warning
MSM: Add USB support for MSM7x30
MSM: Add USB suport for QSD8x50
msm: initial framebuffer support
msm: add handling for clocks tagged as CLK_MINMAX
msm: trout: change name of pmdh_clk to mddi_clk
msm: add CLK_MINMAX to pmdh_clk
msm: trout: add gpio_to_irq
msm: iommu: Use the correct memory allocation flag
msm_serial: Remove redundant unlikely()
msm: iommu: Miscellaneous code cleanup
msm: iommu: Support cache-coherent memory access
msm: iommu: Definitions for extended memory attributes
msm: iommu: Kconfig dependency for the IOMMU API
msm: iommu: Check if device is already attached
msm: iommu: Kconfig item for cacheable page tables
...
Simplify the driver by removing the possibility to build it without the DMA
support and remove the respective Kconfig parameter.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Fixes for sdhci-of and ipmi drivers.
Auditing all drivers using of_get_property did not find other
occurrences likely to be used on LE platforms.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Some OF drivers could likely be used on non-powerpc OF based platforms,
so fix the kconfig depends to be CONFIG_OF instead of CONFIG_PPC_OF.
Compile tested on ARM and sparc.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Make the MMCI announcement printk say which primecell part number
has been found. Display the revision as an unsigned decimal, and
display only the first 8 hex digits of the base address unless it's
larger.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Workqueue creation API has been updated and flush_scheduled_work() is
deprecated and scheduled to be removed.
* core/core.c: Use alloc_ordered_workqueue() instead of
create_singlethread_workqueue(). This removes an unnecessary
rescuer.
* host/omap.c: Create, use and flush mmc_omap_wq instead of the
system_wq.
* Flush host->mmc_carddetect_work directly on removal instead of using
flush_scheduled_work().
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Chris Ball <cjb@laptop.org>
Cc: linux-mmc@vger.kernel.org
Conflicts:
MAINTAINERS
arch/arm/mach-omap2/pm24xx.c
drivers/scsi/bfa/bfa_fcpim.c
Needed to update to apply fixes for which the old branch was too
outdated.
In the error-path where PM notifies PM_POST_RESTORE, the rescan-blockage
should be cleared as well. Otherwise it'll be never re-probed.
Also, as a bonus, this fixes a bug in S4 with user-mode suspend in the
current code, as it sends PM_POST_RESTORE instead of
PM_POST_HIBERNATION wrongly.
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
Based on report made by Yauhen in:
"MMC: Fix multiblock SDIO transfers in AT91 MCI" patch,
I report those changes to the brother driver: atmel-mci.
So, this patch sets SDIO transfer types: SDIO block and SDIO byte
transfers instead of using ordinary MMC block transfers.
It is checking opcode for SDIO CMD53 and setting transfer
type in MCI_CMDR register properly.
Reported-by: Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com>
Cc: <stable@kernel.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
The AT91 MCI has special SDIO transfer types: SDIO block and SDIO byte
transfers, but at91_mci driver doesn't use them and handles all SDIO
transfers as ordinary MMC block transfers. This causes problems for
multiple-block SDIO transfers (in particular for 256-bytes blocks).
Fix this situation by checking the opcode for SDIO CMD53 and setting
the transfer type in the AT91_MCI_CMDR register properly.
This patch was tested with libertas SDIO driver: problem with TX
timeouts on big packets was eliminated.
Signed-off-by: Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com>
Cc: <stable@kernel.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
* msm-core: (28 commits)
msm: initial framebuffer support
msm: add handling for clocks tagged as CLK_MINMAX
msm: trout: change name of pmdh_clk to mddi_clk
msm: add CLK_MINMAX to pmdh_clk
msm: trout: add gpio_to_irq
msm: iommu: Use the correct memory allocation flag
msm_serial: Remove redundant unlikely()
msm: iommu: Miscellaneous code cleanup
msm: iommu: Support cache-coherent memory access
msm: iommu: Definitions for extended memory attributes
msm: iommu: Kconfig dependency for the IOMMU API
msm: iommu: Check if device is already attached
msm: iommu: Kconfig item for cacheable page tables
msm: iommu: Don't flush page tables if no devices attached
msm: iommu: Mark functions with the right section names
msm: iommu: Support for the 2nd GFX core's IOMMU
msm: iommu: Revise GFX2D0 IOMMU contexts and M2V mappings
msm: iommu: Revise GFX3D IOMMU contexts and M2V mappings
msm: iommu: Use more consistent naming in platform data
msm: iomap: Addresses and IRQs for 2nd GFX core IOMMU
...
* msm-mmc: (33 commits)
mmc: msm_sdcc: Check for only DATA_END interrupt to end a request
mmc: msm_sdcc: Fix bug in PIO mode when data size is not word aligned
mmc: msm_sdcc: Reset SDCC in case of data transfer errors
mmc: msm_sdcc: Add prog done interrupt support
mmc: msm_sdcc: Fix possible circular locking dependency warning
msm: initial framebuffer support
msm: add handling for clocks tagged as CLK_MINMAX
msm: trout: change name of pmdh_clk to mddi_clk
msm: add CLK_MINMAX to pmdh_clk
msm: trout: add gpio_to_irq
msm: iommu: Use the correct memory allocation flag
msm_serial: Remove redundant unlikely()
msm: iommu: Miscellaneous code cleanup
msm: iommu: Support cache-coherent memory access
msm: iommu: Definitions for extended memory attributes
msm: iommu: Kconfig dependency for the IOMMU API
msm: iommu: Check if device is already attached
msm: iommu: Kconfig item for cacheable page tables
msm: iommu: Don't flush page tables if no devices attached
msm: iommu: Mark functions with the right section names
...
The current code checks for both DATA_END and DATA_BLK_END bits in
MCI_STATUS register and ends a request only if both are set at a time.
The hardware doesn't always set DATA_BLK_END when DATA_END is set.
But DATA_END status itself is sufficient condition from hardware that
data transfer is done and hence, check for only DATA_END interrupt in
software to end a request.
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
The current code for PIO doesn't transfer whole data when data size
is not in multiple of 4 bytes. The last few bytes are not written to
the card resulting in no DATAEND interrupt from SDCC. This patch
allows data transfer for non-aligned data size in PIO mode.
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
SDCC uses an asynchronous FIFOs for data synchronization (one for TX
and one for RX). For any error when DPSM (Data path state machine) is
involved the transfer is terminated with the remaining data stuck inside
FIFOs. Reset the controller in case of data errors to ensure that
any left over data in FIFOs is flushed out and DPSM is in good state.
The following problems are observed without this reset functionality -
1. After the card is removed in an unsafe way (removed when there
is an on going data transfer), the card will not be detected upon
its next insertion. This is because the controller wouldn't respond
to few initialization commands.
2. When an error occurs for a data transfer in non-DMA mode, sometimes
we get spurious PIO interrupt after the request is processed.
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
Enable prog done interrupt for stop command(CMD12) that is sent
after a multi-block write(CMD25). The PROG_DONE bit is set when
the card has finished its programming and is ready for next data.
After every write request the card will be polled for ready status
using CMD13. For a multi-block write(CMD25) before sending CMD13,
stop command (CMD12) will be sent. If we enable prog done interrupt
for CMD12, then CMD13 polling can be avoided. The prog done interrupt
means that the card is done with its programming and is ready for
next request.
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
In the context of request processing thread, data mover lock is
acquired after the host lock. In another context, in the completion
handler of data mover the locks are acquired in the reverse order,
resulting in possible circular lock dependency warning. Hence,
schedule a tasklet to process the dma completion so as to avoid
nested locks.
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
I misread the datasheet as if bypass mode was not available at all
on the ux500's, I was wrong. It is there, the datasheet just
states that you should not have to use it.
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The Ux500 variant of this block has a different divider.
The value used right now is too big and which means a loss
in performance. This fix corrects it. Also expand the math
comments a bit so it's clear what's happening. Further
the Ux500 variant does not like if we use the BYPASS bit,
instead we are supposed to set the clock divider to zero.
Signed-off-by: Ulf Hansson <ulf.hansson@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The MMCIF controller on sh-mobile platforms can use the DMA controller for data
transfers. Interface to the SH dmaengine driver to enable DMA. We also have to
lower the maximum number of segments to match with the number od DMA
descriptors on SuperH, this doesn't significantly affect driver's PIO
performance.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
In sh_mmcif.c an event is used as a completion, switch over. When a
wait_for_completion*_timeout() returns, it suffices to check the remaining
time, setting an additional flag before waking up the waiting task only reduces
the race window, but does not eliminate it. This patch switches the driver to
use a completion to signal an interrupt, the only case, when an interrupt
should not wake up the waiter, is when an automatic CMD12 completes. Also fix
MODULE_ALIAS.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
We now:
* check for a v3 controller before setting 8-bit bus width
* offer a callback for platform code to switch to 8-bit mode, which
allows non-v3 controllers to support it
* rely on mmc->caps |= MMC_CAP_8_BIT_DATA; in platform code to specify
that the board designers have indeed brought out all the pins for
8-bit to the slot.
We were previously relying only on whether the *controller* supported
8-bit, which doesn't tell us anything about the pin configuration in
the board design.
This fixes the MMC card regression reported by Maxim Levitsky here:
http://thread.gmane.org/gmane.linux.kernel.mmc/4336
by no longer assuming that 8-bit works by default.
Signed-off-by: Philip Rakity <prakity@marvell.com>
Tested-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Some board/card/host configurations are not capable of powering off the
card after boot.
To support such configurations, and to allow smoother transition to
runtime PM behavior, MMC_CAP_POWER_OFF_CARD is added, so hosts need to
explicitly indicate whether it's OK to power off their cards after boot.
SDIO core will enable runtime PM for a card only if that cap is set.
As a result, the card will be powered down after boot, and will only
be powered up again when a driver is loaded (and then it's up to the
driver to decide whether power will be kept or not).
This will prevent sdio_bus_probe() failures with setups that do not
support powering off the card.
Reported-and-tested-by: Daniel Drake <dsd@laptop.org>
Reported-and-tested-by: Arnd Hannemann <arnd@arndnet.de>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Power off the card in mmc_sdio_detect __before__ a potential error
handler, which completely removes the card, executes, and only if the
card was successfully powered on beforehand.
While we're at it, use the _sync variant of the runtime PM put API, in
order to ensure that the card is left powered off in case an error
occurred, and the card is going to be removed.
Reproduced and tested on the OLPC XO-1.5.
Reported-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
While booting OMAP4 ES2.0 boards, cards on MMC1 and MMC2 controllers
are not getting detected sometimes.
During reset of command/data line, wrong pointer to base address
was passed while read operation to SYSCTL register, thus impacting
the updated reset logic.
Passing the correct base address fixes the issue.
Signed-off-by: Kishore Kadiyala <kishore.kadiyala@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Acked-by: Madhusudhan Chikkature <madhu.cr@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
MMC hosts that poll for card detection by defining the MMC_CAP_NEEDS_POLL
flag have a race on rmmod, where the delayed work is cancelled without
waiting for completed polling. To prevent this a _sync version of the work
cancellation has to be used.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: <stable@kernel.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
This adds some minor variant data and trickery to enable SDIO
on the ST Micro variants of MMCI/PL180.
Signed-off-by: Marcin Mielczarczyk <marcin.mielczarczyk@tieto.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
On the U300 the MCI_DATAEND and MCI_DATABLOCKEND IRQs can arrive
out-of-order. Replace an ugly #ifdef hack with a proper runtime
solution which models what is really happening.
In the U300 DMA mode and on all Ux500 models, the MCI_DATABLOCKEND
flag isn't properly cleared in hardware following and ACK leading
to all kind of weird behaviour when the flag is still up in
subsequent interrupts, so we add two flags indicating the
error and handle this runtime.
Cc: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The DBx500 variants have only one IRQ line hooked up. Allow these (and
any other implementations which choose to use only one irq) to work by
directing the PIO interrupts also to the first IRQ line.
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This moves some constants from sh_mmcif.c to sh_mmcif.h
so that they can be used in sh_mmcif_boot_init().
It also alters the definition of SOFT_RST_OFF from (0 << 31) to
~SOFT_RST_ON (= ~(1 << 31)). The former seems bogus. The latter is
consistent with the code in sh_mmcif_boot_init().
Cc: Yusuke Goda <yusuke.goda.sx@renesas.com>
Cc: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
SDHC2 is newly added in C0 stepping of Langwell. Without the Moorestown
specific quirk, the default pci_probe will be called and crash the kernel.
This patch unblocks the crash problem on C0 by using the same probing
function as HC1, which limits the number of slots to one.
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Only these CPUs list the bug in their errata.
Signed-off-by: Eric Bénard <eric@eukrea.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
This patch fixes timeout problems on i.MX's sdhci as suggested by
Richard Zhu.
Tested on:
- i.MX257: not needed
- i.MX357: needed
- i.MX515: needed
More details can be found here:
http://lists.infradead.org/pipermail/linux-arm-kernel/2010-October/029748.html
Signed-off-by: Eric Bénard <eric@eukrea.com>
Tested-by: Shawn Guo <shawn.gsc@gmail.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
A little more work was needed for SDIO IRQ wakeups to be functional.
Wake-on-WLAN on the SD WiFi adapter in the XO-1.5 laptop is now working.
Signed-off-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Improves error handling in the ushc driver.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
We should not call mmc_card_set_ddr_mode() if we are in single data
mode. This sets DDR and causes the kernel log to say the card is DDR
when it is not.
Explicitly set ddr to 0 rather then rely on MMC_SDR_MODE being 0 when
doing the checks.
Signed-off-by: Philip Rakity <prakity@marvell.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Adding card detect callback function and card detect configuration
function for MMC1 Controller on OMAP4.
Card detect configuration function does initial configuration of the
MMC Control & PullUp-PullDown registers of Phoenix.
For MMC1 Controller, card detect interrupt source is
twl6030 which is non-gpio. The card detect call back function provides
card present/absent status by reading MMC Control register present
on twl6030.
Since OMAP4 doesn't use any GPIO line as used in OMAP3 for card detect,
the suspend/resume initialization which was done in omap_hsmmc_gpio_init
previously is moved to the probe thus making it generic for both OMAP3 &
OMAP4.
Cc: Tony Lindgren <tony@atomide.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Madhusudhan Chikkature <madhu.cr@ti.com>
Cc: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Kishore Kadiyala <kishore.kadiyala@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Adjust the tmio_mmc block size check to accept 2-byte requests in 4-bit
mode if the hardware supports it.
Tested with the SDHI hardware block included in sh7724.
Signed-off-by: Yusuke Goda <yusuke.goda.sx@renesas.com>
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Acked-by: Magnus Damm <damm@opensource.se>
Tested-by: Arnd Hannemann <arnd@arndnet.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
In some platforms (e.g. AP4EVB) the card detect pin of a slot is not
directly connected to the sh_mmcif controller, so that polling needs
to be used. To overcome the overhead induced by querying the controller
on each poll cycle, card detection can be handled in the platform code
more efficiently.
This patch exposes a get_cd hook for that purpose.
Signed-off-by: Arnd Hannemann <arnd@arndnet.de>
Tested-by: Yusuke Goda <yusuke.goda.sx@renesas.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Some controllers, supported by the tmio_mmc driver do not have the card
detect pin of a slot connected, so that polling needs to be used and
card detection is handled by other means.
This patch exposes a get_cd hook for that purpose.
Signed-off-by: Arnd Hannemann <arnd@arndnet.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc: (66 commits)
mmc: add new sdhci-pxa driver for Marvell SoCs
mmc: make number of mmcblk minors configurable
mmc_spi: Recover from CRC errors for r/w operation over SPI.
mmc: sdhci-pltfm: add -pltfm driver for imx35/51
mmc: sdhci-of-esdhc: factor out common stuff
mmc: sdhci_pltfm: pass more data on custom init call
mmc: sdhci: introduce get_ro private write-protect hook
mmc: sdhci-pltfm: move .h file into appropriate subdir
mmc: sdhci-pltfm: Add structure for host-specific data
mmc: fix cb710 kconfig dependency warning
mmc: cb710: remove debugging printk (info duplicated from mmc-core)
mmc: cb710: clear irq handler on init() error path
mmc: cb710: remove unnecessary msleep()
mmc: cb710: implement get_cd() callback
mmc: cb710: partially demystify clock selection
mmc: add a file to debugfs for changing host clock at runtime
mmc: sdhci: allow for eMMC 74 clock generation by controller
mmc: sdhci: highspeed: check for mmc as well as sd cards
mmc: sdhci: Add Moorestown device support
mmc: sdhci: Intel Medfield support
...
This adds the support of atmel-mci sd/mmc driver in at91sam9g45 devices and
board files. This also configures the DMA controller slave interface for
at_hdmac dmaengine driver.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
* 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6: (163 commits)
omap: complete removal of machine_desc.io_pg_offst and .phys_io
omap: UART: fix wakeup registers for OMAP24xx UART2
omap: Fix spotty MMC voltages
ASoC: OMAP4: MCPDM: Remove unnecessary include of plat/control.h
serial: omap-serial: fix signess error
OMAP3: DMA: Errata i541: sDMA FIFO draining does not finish
omap: dma: Fix buffering disable bit setting for omap24xx
omap: serial: Fix the boot-up crash/reboot without CONFIG_PM
OMAP3: PM: fix scratchpad memory accesses for off-mode
omap4: pandaboard: enable the ehci port on pandaboard
omap4: pandaboard: Fix the init if CONFIG_MMC_OMAP_HS is not set
omap4: pandaboard: remove unused hsmmc definition
OMAP: McBSP: Remove null omap44xx ops comment
OMAP: McBSP: Swap CLKS source definition
OMAP: McBSP: Fix CLKR and FSR signal muxing
OMAP2+: clock: reduce the amount of standard debugging while disabling unused clocks
OMAP: control: move plat-omap/control.h to mach-omap2/control.h
OMAP: split plat-omap/common.c
OMAP: McBSP: implement functional clock switching via clock framework
OMAP: McBSP: implement McBSP CLKR and FSR signal muxing via mach-omap2/mcbsp.c
...
Fixed up trivial conflicts in arch/arm/mach-omap2/
{board-zoom-peripherals.c,devices.c} as per Tony
The old limit of number of minor numbers per mmcblk device was hardcoded
at 8. This isn't enough for some of the more elaborate partitioning
schemes, for example those used by Chrome OS.
Since there might be a bunch of systems out there with static /dev
contents that relies on the old numbering scheme, let's make it a
build-time option with the default set to the previous 8.
Also provide a boot/modprobe-time parameter to override the config
default: mmcblk.perdev_minors.
Signed-off-by: Olof Johansson <olof@lixom.net>
Cc: Mandeep Baines <msb@chromium.org>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
The SPI bus is not reliable for large data transfers on all platforms.
The current mmc_spi driver fails SD read/write commands immediately if
occasional CRC errors are reported by the SD device. This patch makes
the operation recover from CRC errors by repeating the last SD command.
The retry count is set to 5 to ensure the driver passes stress tests.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
This driver adds basic support for the esdhc-core found on e.g.
imx35/51, as a platform driver.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Tested-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Put everything which can be shared between the OF and platform version
of this driver into a local .h file.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Tested-by: Eric Bénard <eric@eukrea.com>
[cjb: fix compile error: sdhci-esdhc.c->sdhci-esdhc.h]
Signed-off-by: Chris Ball <cjb@laptop.org>
The custom init call may need more data to perform its job, so we pass
it a pointer to pdata, too. Also, always use the platform_id specific
data even if platform_data is present. Doing that, platform_data can
additionally be parsed by init() for board-specific information (via
sdhci->mmc->parent).
(Note: the old behaviour was that you could override the platform_id
specific data with your own. However, one can still do this by using the
"sdhci" id instead of "sdhci-<something>".)
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Tested-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Some controllers handle their write-protection differently. Introduce a
callback to be able to handle it, ensuring the same locking takes place
for it. Rename the status variable to make it more obvious why the read
from the registers needs to be inverted.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Tested-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Make use of the include/linux/mmc directory.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Tested-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
We need to carry some information per host, e.g. the clock. Add a
structure for it and initialize it in the generic part. Also improve
the check for a parent.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Richard Röjfors <richard.rojfors.ext@mocean-labs.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Fix kconfig dependency warning to satisfy dependencies:
warning: (MMC_CB710 && MMC && PCI) selects CB710_CORE which has
unmet direct dependencies (MISC_DEVICES && PCI)
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Chris Ball <cjb@laptop.org>
Clock divider selection in partially verified, so document known facts
in code.
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Chris Ball <cjb@laptop.org>
For debugging power management features it is convenient to have the
possibility of changing the MMC host controller clock at runtime. This
patch adds a 'clock' file for this under the MMC host root of debugfs.
Usage is as follows:
# cat /sys/kernel/debug/mmc0/clock
52000000
# echo "1000000000" > /sys/kernel/debug/mmc0/clock
# cat /sys/kernel/debug/mmc0/clock
52000000
# echo "48000000" > /sys/kernel/debug/mmc0/clock
# cat /sys/kernel/debug/mmc0/clock
48000000
The middle example shows limits being applied by the host driver.
Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@nokia.com>
Cc: Adrian Hunter <adrian.hunter@nokia.com>
[cjb: modify changelog language]
Signed-off-by: Chris Ball <cjb@laptop.org>
Snippet of code for how adaptation layer should handle the call:
/*
* eMMC spec calls for the host to send 74 clocks to the card
* during initialization, right after voltage stabilization.
* create the clocks manually right here.
*/
void generate_init_clocks_A0(struct sdhci_host *host, u8 power_mode)
{
struct sdhci_mmc_slot *slot = sdhci_priv(host);
if (slot->power_mode == MMC_POWER_UP &&
power_mode == MMC_POWER_ON) {
/* controller specific code here */
/* slot->power_mode holds previous power setting */
}
slot->power_mode = power_mode;
}
Signed-off-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
The SD and MMC code set highspeed using different constants.
Change the sd driver to recognize this and switch to high speed.
Validated code when testing eMMC dual data rate.
Signed-off-by: Philip Rakity <prakity@marvell.com>
[cjb: changelog + indentation fixes]
Signed-off-by: Chris Ball <cjb@laptop.org>
This adds the basic identifiers. Due to the various chip quirks it's not
enough to make MRST support very useful for earlier steppings but that can
follow.
(I'm currently trying to verify which steps actually matter outside Intel
so I can avoid unneeded stuff going upstream)
[Extracted from original development]
Signed-off-by: JiebingLi <jiebing.li@intel.com>
[Folds in fixes]
Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Basic support for the Intel Medfield devices
Give them their own quirks as we will need to update this later.
Signed-off-by: Xiaochen Shen <xiaochen.shen@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Currently we write it to the chip data, but if the probe handler overrides
it we ignore the new value and keep using our cached one. Fix this so that
a probe handler can adjust the slot count.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Bring SDIO devices back to full power before their suspend
handler is invoked.
Doing so ensures that SDIO suspend/resume semantics are
maintained (drivers still get to decide whether their
card should be removed or kept during system suspend,
and at what power state), and that SDIO suspend/resume
execution paths are unchanged.
This is achieved by resuming a runtime-suspended SDIO device
in its ->prepare() PM callback (similary to the PCI subsystem).
Since the PM core always increments the run-time usage
counter before calling the ->prepare() callback and decrements
it after calling the ->complete() callback, it is guaranteed
that when the system will come out of suspend, our device's
power state will reflect its runtime PM usage counter.
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Tested-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
To prevent an erroneous removal of the card, make sure
the device is powered when it is mmc_sdio_detect()ed.
This is required since mmc_sdio_detect may be invoked
while the device is runtime suspended (e.g., MMC core
is rescanning when system comes out of suspend).
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Tested-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Enable runtime PM for SDIO functions.
SDIO functions are initialized with a disabled runtime PM state,
and are set active (and their usage count is incremented)
only before potential drivers are probed.
SDIO function drivers that support runtime PM should call
pm_runtime_put_noidle() in their probe routine, and
pm_runtime_get_noresume() in their remove routine (very
similarly to PCI drivers).
In case a matching driver does not support runtime PM, power will
always be kept high (since the usage count is positive).
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Tested-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Enable runtime PM for new SDIO cards.
As soon as the card will be added to the device tree, runtime PM core
will release its power, since it doesn't have any users yet.
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Tested-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Assign the generic runtime PM handlers for SDIO.
These handlers invoke the relevant SDIO function drivers'
handlers, if exist, otherwise they just return success
(so SDIO drivers don't have to define any runtime PM handlers
unless they need to).
Runtime PM is still disabled by default, so this patch alone
has no immediate effect.
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Tested-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Add MMC runtime PM handlers, which call mmc_power_save_host
and mmc_power_restore_host in response to runtime_suspend and
runtime_resume events.
Runtime PM is still disabled by default, so this patch alone
has no immediate effect.
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Tested-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Add a power_restore handler to the SDIO bus ops,
in order to support waking up SDIO cards that
were powered off by runtime pm.
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Tested-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Allow power save/restore and their relevant mmc_bus_ops handlers
exit with a return value.
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Tested-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
On resume, let mmc_sdio_init_card go all the way, instead
of skipping the reconfiguration of the card's speed and width.
This is needed to ensure cards wake up with their clock
reconfigured (otherwise it's kept low).
This patch also removes the explicit bus width reconfiguration
on resume, since now this is part of mmc_sdio_init_card.
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Tested-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Some platforms based on sdhci-pltfm need to set their own quirks.
Previously to this patch, the quirks were in drivers/mmc/host/sdhci.h.
This patch splits drivers/mmc/host/sdhci.h into two parts:
* drivers/mmc/host/sdhci.h includes the HC registers and I/O accessors.
* include/linux/mmc/sdhci.h includes the sdhci structure and quirks.
Instead of including drivers/mmc/host/sdhci.h, -pltfm drivers should
now include include/linux/mmc/sdhci.h and include/linux/sdhci-pltfm.h.
This patch avoids adding/changing the calls/flags in the
sdhci_pltfm_data structure. It has been tested on STM platforms
(e.g. STx7106, STx7108, STx5206) where the driver is configured
and used as shown in the example below:
[snip]
static int mmc_pad_resources(struct sdhci_host *sdhci)
{
if (!devm_stm_pad_claim(sdhci->mmc->parent,
&stx7108_mmc_pad_config,
dev_name(sdhci->mmc->parent)))
return -ENODEV;
return 0;
}
static struct sdhci_pltfm_data stx7108_mmc_platform_data = {
.init = mmc_pad_resources,
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
};
static struct platform_device stx7108_mmc_device = {
.name = "sdhci",
[snip]
Note: drivers/mmc/host/sdhci.h now also includes linux/mmc/sdhci.h,
and no modifications should be needed on other sdhci-<XXX> drivers.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
This patch fixes a warning when compiling the sdhci driver:
pwr may be used uninitialized in sdhci_set_power
Tested with the following compiler versions: 4.2.4 and 4.4.4
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
This patch adds the suspend and resume functions
in the sdhci-pltfm device driver.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
Usually there are multiple mmc host controllers; rename mmc queue thread
by host index so we can easily identify which controller it belongs to.
Signed-off-by: Ethan Du <ethan.too@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
One flaw with DDR support is that MMC core does not inform the driver
which DDR mode it has selected. This patch expands the ios->ddr flag
to do that.
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
The DDR support patch needs the following fixes:
- The block driver does not need to know about DDR, any more
than it needs to know about bus width.
- Not only the card must be switched to DDR mode. The host
controller must also be configured, which is done through
the 'set_ios()' function.
- Do not set the DDR mode state until after the switch command
is successful.
- Setting block length is not supported in DDR mode. Make that
a core function and change the other place it is used (mmc_test)
also.
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Add support for Dual Data Rate MMC cards as defined in the 4.4
specification.
Signed-off-by: Hanumath Prasad <hanumath.prasad@stericsson.com>
Cc: linux-mmc@vger.kernel.org
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Tested-by Zhangfei Gao <zhangfei.gao@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
After discovering a problem in regulator reference counting I took Mark
Brown's advice to move the reference count into the MMC core by making the
regulator status a member of struct mmc_host.
I took this opportunity to also implement NULL versions of
the regulator functions so as to rid the driver code from
some ugly #ifdef CONFIG_REGULATOR clauses.
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Liam Girdwood <lrg@slimlogic.co.uk>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Adrian Hunter <adrian.hunter@nokia.com>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Sundar Iyer <sundar.iyer@stericsson.com>
Cc: Daniel Mack <daniel@caiaq.de>
Cc: Pierre Ossman <pierre@ossman.eu>
Cc: Matt Fleming <matt@console-pimps.org>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Cliff Brake <cbrake@bec-systems.com>
Cc: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
mmc_rescan() includes a pr_info which prints 4 lines each second for
hosts configured with MMC_CAP_NEEDS_POLL. This patch enables the message
only if CONFIG_MMC_DEBUG is selected. Tested on i.MX51's sdhci-esdhc.
Signed-off-by: Eric Bénard <eric@eukrea.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Hein Tibosch <hein_tibosch@yahoo.es>
Signed-off-by: Chris Ball <cjb@laptop.org>
In the latest releases of the mmc driver, the freq during initialization
is set to a fixed 400 Khz. This was reportedly too fast for several
users. As there doesn't seem to be an ideal frequency
which-works-for-all, Pierre suggested to let the driver try several
frequencies.
This patch implements that idea. It will try mmc-initialization using
several frequencies from an array 400, 300, 200 and 100.
In case SDIO is broken, it'll still try to detect SDMEM, also at different
freqs.
Signed-off-by: Hein Tibosch <hein_tibosch@yahoo.es>
Cc: Pierre Ossman <pierre@ossman.eu>
Reviewed-by: Chris Ball <cjb@laptop.org>
Tested-by: Chris Ball <cjb@laptop.org>
Cc: Ben Nizette <bn@niasdigital.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Adrian Hunter <adrian.hunter@nokia.com>
Cc: Matt Fleming <matt@console-pimps.org>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
When a controller requires SDHCI_QUIRK_BROKEN_CARD_DETECTION, we poll
for card insertion/removal, and that creates interrupts. There's no
need to be doing this if we have a non-removable card.
This patch requires cards to be removable before we're willing to set
MMC_CAP_NEEDS_POLL.
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Matt Fleming <matt@console-pimps.org>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
[cjb: modified changelog and code indentation]
Signed-off-by: Chris Ball <cjb@laptop.org>
There are two checks that need to be made when determining whether a
card is removable. A host controller may set MMC_CAP_NONREMOVABLE if the
controller does not support removing cards (e.g. eMMC), in which case
the card is physically non-removable. Also the 'mmc_assume_removable'
module parameter can be configured at module load time, in which case
the card may be logically non-removable.
A helper function keeps the logic in one place so that code always
checks both conditions.
Because this new function is likely to be called from modules we now
need to export the mmc_assume_removable symbol.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
The EXTRA_CFLAGS assignment in mmc/Makefile was not accomplishing
anything because this flag only has effect on sources at the same level
as the makefile (i.e., per directory). Since card/, core/, and host/
rely on MMC_DEBUG, the subdir-ccflags-y variant seems to be the
appropriate choice.
Signed-off-by: matt mooney <mfm@muteddisk.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
In a multi-controller environment it is helpful to know which controller
has problems.
Signed-off-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This patch is necessary to gain the performance boost from 8-bit data
with the sdhci-stm driver.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
MMC_CAP_MMC_HIGHSPEED allows MMC and eMMC to negotiate up to 50M
instead of the previous limit of 25M.
Signed-off-by: Zhangfei Gao <zgao6@marvell.com>
Acked-by: Matt Fleming <matt@console-pimps.org>
Acked-by: Kyungmin Park <kmpark@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
While we're at it, add symbols for SDHCI_MAX_DIV_SPEC_{200,300}.
Signed-off-by: Zhangfei Gao <zhangfei.gao@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
SDHC Spec 3.0: Capabilities Register bits[15-08] are Base Clock Frequency
1.0/2.0: Capabilities Register bits[13-08] are Base Clock Frequency
Signed-off-by: Zhangfei Gao <zgao6@marvell.com>
Cc: David Vrabel <david.vrabel@csr.com>
Cc: Matt Fleming <matt@console-pimps.org>
Cc: Michal Miroslaw <mirqus@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Alberto Panizzo
Mike Rapoport
Linus Torvalds
Paul Mundt
Russell King
Guennadi Liakhovetski
Rob Herring
Tejun Heo
Jiri Kosina
Takashi Iwai
Nicolas Ferre
Yauhen Kharuzhy
David Brown
Sahitya Tummala
Linus Walleij
Philip Rakity
Ohad Ben-Cohen
kishore kadiyala
Simon Horman
Jacob Pan
Eric Bénard
Daniel Drake
Axel Lin
Uwe Kleine-König
Yusuke Goda
Arnd Hannemann
Zhangfei Gao
Olof Johansson
Sonic Zhang
Wolfram Sang
Randy Dunlap
Michał Mirosław
Andy Shevchenko
Alan Cox
Xiaochen Shen
Giuseppe Cavallaro
Ethan Du
Adrian Hunter
Hanumath Prasad
Hein Tibosch
Jaehoon Chung
Matt Fleming
matt mooney
Zhangfei Gao