linux-toradex.git/drivers/mmc/host/mxcmmc.c, branch v3.12.20

mmc: mxcmmc: handle mmc_of_parse() errors during probe

2013-06-27T14:23:05+00:00

Signed-off-by: Simon Baatz 
Signed-off-by: Chris Ball

mmc: remove unnecessary platform_set_drvdata()

2013-05-26T18:23:23+00:00

The driver core clears the driver data to NULL after device_release
or on probe failure, since commit 0998d0631001288a5974afc0b2a5f568bcdecb4d
(device-core: Ensure drvdata = NULL when no driver is bound).
Thus, it is not needed to manually clear the device driver data to NULL.

Signed-off-by: Jingoo Han 
Acked-by: Sonic Zhang 
Acked-by: Seungwon Jeon 
Acked-by: Shawn Guo 
Acked-by: Adrian Hunter 
Acked-by: Haojian Zhuang 
Acked-by: Jaehoon Chung 
Acked-by: Viresh Kumar 
Acked-by: Tony Prisk 
Signed-off-by: Chris Ball

mmc: mxcmmc: enable DMA support on mpc512x

2013-04-12T19:13:41+00:00

Add SDHC DMA channel description to the mpc512x device tree to enable
slave channel requesting in the mxcmmc driver.

mpc512x DMA engine doesn't support endianness conversion when
reading/writing data from peripheral's FIFO, so we have to swap data
buffers before each DMA write and after each DMA read transfer manually.

Since chained SDHC DMA transfers are not supported on mpc512x, limit
'max_segs' tunable parameter to one and initialise it to 64 only when
running on i.MX platforms.

Signed-off-by: Anatolij Gustschin 
Acked-by: Sascha Hauer 
Signed-off-by: Chris Ball

mmc: mxcmmc: constify mxcmci_devtype

2013-04-12T19:13:34+00:00

mxcmci_devtype struct contains constant data, so
constify this struct.

Signed-off-by: Anatolij Gustschin 
Acked-by: Sascha Hauer 
Signed-off-by: Chris Ball

mmc: mxcmmc: use slot-gpio API for write-protect detection

2013-04-12T19:13:27+00:00

slot-gpio API suppors read-only detection when "wp-gpios"
property is present in the device tree mmc node. Use this
API for write-protect detection.

Signed-off-by: Anatolij Gustschin 
Acked-by: Sascha Hauer 
Signed-off-by: Chris Ball

mmc: mxcmmc: add mpc512x SDHC support

2013-04-12T19:13:20+00:00

The SDHC controller on mpc512x is compatible with i.MX31 SDHC,
so the mxcmmc driver can be used on mpc512x, too. Extend the
driver to support mpc512x as well.

Signed-off-by: Anatolij Gustschin 
Acked-by: Sascha Hauer 
Signed-off-by: Chris Ball

mmc: mxcmmc: fix race conditions for host->req and host->data access

2013-04-12T19:13:13+00:00

mxcmci_dma_callback() is invoked by DMA drivers in soft-irq
context and can be interrupted by the mxcmci_irq() interrupt
which can finish the mmc request or data transfer and set
host->req or host->data pointers to NULL. Then mxcmci_data_done()
crashes with a null pointer dereferences. Protect all accesses
to host->req and host->data by spin locks.

Also check host->data pointer in mxcmci_watchdog() before
dereferencing it.

Signed-off-by: Anatolij Gustschin 
Acked-by: Sascha Hauer 
Signed-off-by: Chris Ball

mmc: mxcmmc: DT support

2013-04-12T19:12:34+00:00

Adding devicetree support for imx21-mmc and imx31-mmc. Based on generic
gpio helper functions by Guennadi and generic DMA devicetree bindings.

Signed-off-by: Markus Pargmann 
Signed-off-by: Anatolij Gustschin 
Acked-by: Arnd Bergmann 
Signed-off-by: Chris Ball

mmc: mxcmmc: Fix bug when card is present during boot

2013-04-12T18:12:50+00:00

This patch fixes bug when card is present during boot.
Bug was introduced due commit "mmc: mxcmmc: fix bug that may block a
data transfer forever". When a card is present "mxcmci_setup_data"
function is executed, but the timer is not initialized.

...
i.MX SDHC driver
mmc0: SD Status: Invalid Allocation Unit size.
mmc0: new SD card at address b368
mmcblk0: mmc0:b368 SDC   1.91 GiB
------------[ cut here ]------------
kernel BUG at kernel/timer.c:729!
Internal error: Oops - BUG: 0 [#1] PREEMPT ARM
CPU: 0    Not tainted  (3.9.0-rc5-next-20130404 #2)
PC is at mod_timer+0x168/0x198
LR is at mxcmci_request+0x21c/0x328
...

Signed-off-by: Alexander Shiyan 
Acked-by: Sascha Hauer 
Signed-off-by: Chris Ball

Merge tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

2012-12-12T19:51:39+00:00

Pull ARM SoC cleanups on various subarchitectures from Olof Johansson:
 "Cleanup patches for various ARM platforms and some of their associated
  drivers.  There's also a branch in here that enables Freescale i.MX to
  be part of the multiplatform support -- the first "big" SoC that is
  moved over (more multiplatform work comes in a separate branch later
  during the merge window)."

Conflicts fixed as per Olof, including a silent semantic one in
arch/arm/mach-omap2/board-generic.c (omap_prcm_restart() was renamed to
omap3xxx_restart(), and a new user of the old name was added).

* tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (189 commits)
  ARM: omap: fix typo on timer cleanup
  ARM: EXYNOS: Remove unused regs-mem.h file
  ARM: EXYNOS: Remove unused non-dt support for dwmci controller
  ARM: Kirkwood: Use hw_pci.ops instead of hw_pci.scan
  ARM: OMAP3: cm-t3517: use GPTIMER for system clock
  ARM: OMAP2+: timer: remove CONFIG_OMAP_32K_TIMER
  ARM: SAMSUNG: use devm_ functions for ADC driver
  ARM: EXYNOS: no duplicate mask/unmask in eint0_15
  ARM: S3C24XX: SPI clock channel setup is fixed for S3C2443
  ARM: EXYNOS: Remove i2c0 resource information and setting of device names
  ARM: Kirkwood: checkpatch cleanups
  ARM: Kirkwood: Fix sparse warnings.
  ARM: Kirkwood: Remove unused includes
  ARM: kirkwood: cleanup lsxl board includes
  ARM: integrator: use BUG_ON where possible
  ARM: integrator: push down SC dependencies
  ARM: integrator: delete static UART1 mapping
  ARM: integrator: delete SC mapping on the CP
  ARM: integrator: remove static CP syscon mapping
  ARM: integrator: remove static AP syscon mapping
  ...