Merge tag 'spi-v3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi updates from Mark Brown:
 "A fairly quiet release for SPI, mainly driver work.  A few highlights:

   - Supports bits per word compatibility checking in the core.
   - Allow use of the IP used in Freescale SPI controllers outside
     Freescale SoCs.
   - DMA support for the Atmel SPI driver.
   - New drivers for the BCM2835 and Tegra114"

* tag 'spi-v3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (68 commits)
  spi-topcliff-pch: fix to use list_for_each_entry_safe() when delete list items
  spi-topcliff-pch: missing platform_driver_unregister() on error in pch_spi_init()
  ARM: dts: add pinctrl property for spi node for atmel SoC
  ARM: dts: add spi nodes for the atmel boards
  ARM: dts: add spi nodes for atmel SoC
  ARM: at91: add clocks for spi dt entries
  spi/spi-atmel: add dmaengine support
  spi/spi-atmel: add flag to controller data for lock operations
  spi/spi-atmel: add physical base address
  spi/sirf: fix MODULE_DEVICE_TABLE
  MAINTAINERS: Add git repository and update my address
  spi/s3c64xx: Check for errors in dmaengine prepare_transfer()
  spi/s3c64xx: Fix non-dmaengine usage
  spi: omap2-mcspi: fix error return code in omap2_mcspi_probe()
  spi/s3c64xx: let device core setup the default pin configuration
  MAINTAINERS: Update Grant's email address and maintainership
  spi: omap2-mcspi: Fix transfers if DMADEVICES is not set
  spi: s3c64xx: move to generic dmaengine API
  spi-gpio: init CS before spi_bitbang_setup()
  spi: spi-mpc512x-psc: let transmiter/receiver enabled when in xfer loop
  ...

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 38c2b92..733eb5e 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -228,6 +228,11 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
  *	every chipselect is connected to a slave.
  * @dma_alignment: SPI controller constraint on DMA buffers alignment.
  * @mode_bits: flags understood by this controller driver
+ * @bits_per_word_mask: A mask indicating which values of bits_per_word are
+ *	supported by the driver. Bit n indicates that a bits_per_word n+1 is
+ *	suported. If set, the SPI core will reject any transfer with an
+ *	unsupported bits_per_word. If not set, this value is simply ignored,
+ *	and it's up to the individual driver to perform any validation.
  * @flags: other constraints relevant to this driver
  * @bus_lock_spinlock: spinlock for SPI bus locking
  * @bus_lock_mutex: mutex for SPI bus locking
@@ -301,6 +306,9 @@ struct spi_master {
 	/* spi_device.mode flags understood by this controller driver */
 	u16			mode_bits;
 
+	/* bitmask of supported bits_per_word for transfers */
+	u32			bits_per_word_mask;
+
 	/* other constraints relevant to this driver */
 	u16			flags;
 #define SPI_MASTER_HALF_DUPLEX	BIT(0)		/* can't do full duplex */