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c4fe57f762
linux/drivers/spi
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Michael van der Westhuizen c4fe57f762 spi: dw: Allow interface drivers to limit data I/O to word sizes 
The commit dd11444327 ("spi: dw-spi: Convert 16bit accesses to 32bit
accesses") changed all 16bit accesses in the DW_apb_ssi driver to 32bit.
This, unfortunately, breaks data register access on picoXcell, where the
DW IP needs data register accesses to be word accesses (all other
accesses appear to be OK).

This change introduces a new master variable to allow interface drivers
to specify that 16bit data transfer I/O is required.  This change also
introduces the ability to set this variable via device tree bindings in
the MMIO interface driver.  Both the core and the MMIO interface driver
default to the current 32bit behaviour.

Before this change, on a picoXcell pc3x3:
 spi_master spi32766: interrupt_transfer: fifo overrun/underrun
 m25p80 spi32766.0: error -5 reading 9f
 m25p80: probe of spi32766.0 failed with error -5

After this change:
 m25p80 spi32766.0: m25p40 (512 Kbytes)

Fixes: dd11444327 ("spi: dw-spi: Convert 16bit accesses to 32bit accesses")
Signed-off-by: Michael van der Westhuizen <michael@smart-africa.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-21 10:25:28 -07:00
..
Kconfig Merge remote-tracking branches 'spi/topic/sirf', 'spi/topic/spidev' and 'spi/topic/zynq' into spi-next 2015-06-18 00:19:56 +01:00
Makefile Merge remote-tracking branches 'spi/topic/sirf', 'spi/topic/spidev' and 'spi/topic/zynq' into spi-next 2015-06-18 00:19:56 +01:00
spi-adi-v3.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-altera.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-ath79.c spi: spi-ath79: Set the initial state of CS0 2015-04-27 15:44:57 +01:00
spi-atmel.c spi: atmel: add support to FIFOs 2015-06-16 13:08:19 +01:00
spi-au1550.c spi: Remove FSF mailing addresses 2014-12-22 15:32:42 +00:00
spi-bcm53xx.c Merge remote-tracking branches 'spi/topic/atmel', 'spi/topic/bcm2385', 'spi/topic/bcm2835', 'spi/topic/bcm53xx' and 'spi/topic/bitbang' into spi-next 2015-04-11 23:09:03 +01:00
spi-bcm53xx.h
spi-bcm63xx-hsspi.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-bcm63xx.c spi: Remove FSF mailing addresses 2014-12-22 15:32:42 +00:00
spi-bcm2835.c spi: bcm2835: bcm2835_dma_release() can be static 2015-05-12 15:37:22 +01:00
spi-bfin5xx.c spi: spi-bfin5xx: Initialize cr_width in bfin_spi_pump_transfers() 2015-04-01 21:28:56 +01:00
spi-bfin-sport.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-bitbang-txrx.h spi: bitbang: only toggle bitchanges 2015-03-31 17:20:36 +01:00
spi-bitbang.c spi: bitbang: Make setup_transfer() callback optional 2015-04-18 12:01:03 +01:00
spi-butterfly.c spi: Remove FSF mailing addresses 2014-12-22 15:32:42 +00:00
spi-cadence.c Merge remote-tracking branches 'spi/topic/atmel', 'spi/topic/cadence', 'spi/topic/dw' and 'spi/topic/fsl-cpm' into spi-next 2014-12-08 12:17:12 +00:00
spi-clps711x.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-coldfire-qspi.c spi: Remove FSF mailing addresses 2014-12-22 15:32:42 +00:00
spi-davinci.c spi: davinci: change the lower limit of pre-scale divider to 1 2015-06-10 18:28:04 +01:00
spi-dln2.c spi/dln2: simplify return flow for dln2_spi_transfer_setup and dln2_spi_enable 2015-01-06 17:02:50 +00:00
spi-dw-mid.c spi: dw-spi: Convert 16bit accesses to 32bit accesses 2015-03-17 12:27:09 +00:00
spi-dw-mmio.c spi: dw: Allow interface drivers to limit data I/O to word sizes 2015-08-21 10:25:28 -07:00
spi-dw-pci.c spi: dw-pci: correct number of chip selects 2015-02-24 16:59:32 +09:00
spi-dw.c spi: dw: Allow interface drivers to limit data I/O to word sizes 2015-08-21 10:25:28 -07:00
spi-dw.h spi: dw: Allow interface drivers to limit data I/O to word sizes 2015-08-21 10:25:28 -07:00
spi-efm32.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-ep93xx.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-falcon.c Merge remote-tracking branches 'spi/topic/falcon', 'spi/topic/fsf', 'spi/topic/fsl', 'spi/topic/fsl-dspi' and 'spi/topic/gpio' into spi-next 2015-02-08 11:16:46 +08:00
spi-fsl-cpm.c spi: fsl-spi: fix devm_ioremap_resource() error case 2015-04-24 13:27:53 +01:00
spi-fsl-cpm.h
spi-fsl-dspi.c spi: fsl-dspi: Use pinctrl PM helpers 2015-06-12 18:28:13 +01:00
spi-fsl-espi.c Merge remote-tracking branches 'spi/fix/fsl-dspi', 'spi/fix/fsl-espi', 'spi/fix/orion' and 'spi/fix/pl022' into spi-linus 2015-06-18 00:19:46 +01:00
spi-fsl-lib.c spi: fsl-(e)spi: Support compile as module 2015-01-06 17:03:34 +00:00
spi-fsl-lib.h spi: fsl-(e)spi: Support compile as module 2015-01-06 17:03:34 +00:00
spi-fsl-spi.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
spi-fsl-spi.h
spi-gpio.c Merge remote-tracking branches 'spi/topic/falcon', 'spi/topic/fsf', 'spi/topic/fsl', 'spi/topic/fsl-dspi' and 'spi/topic/gpio' into spi-next 2015-02-08 11:16:46 +08:00
spi-img-spfi.c Merge remote-tracking branch 'spi/fix/img-spfi' into spi-linus 2015-04-11 23:08:54 +01:00
spi-imx.c spi: imx: Constify platform_device_id 2015-05-01 17:37:26 +01:00
spi-lm70llp.c spi: Remove FSF mailing addresses 2014-12-22 15:32:42 +00:00
spi-meson-spifc.c spi: meson: Constify struct regmap_config 2015-01-05 20:11:32 +00:00
spi-mpc52xx-psc.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-mpc52xx.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-mpc512x-psc.c spi: constify of_device_id array 2015-03-17 12:15:22 +00:00
spi-mxs.c spi: mxs: cleanup wait_for_completion return handling 2015-02-05 18:04:57 +00:00
spi-nuc900.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-oc-tiny.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-octeon.c spi: constify of_device_id array 2015-03-17 12:15:22 +00:00
spi-omap2-mcspi.c spi: omap2-mcspi: Handle error on gpio_request 2015-05-25 13:00:04 +01:00
spi-omap-100k.c spi/omap100k: Convert to runtime PM 2015-03-17 12:25:48 +00:00
spi-omap-uwire.c spi: omap-uwire: Remove needless include asm/irq.h 2015-03-23 09:43:37 -07:00
spi-orion.c spi: orion: Fix extended baud rates for each Armada SoCs 2015-05-27 18:44:57 +01:00
spi-pl022.c Merge remote-tracking branches 'spi/topic/omap-100k', 'spi/topic/omap-uwire', 'spi/topic/pl022', 'spi/topic/pm' and 'spi/topic/pxa2xx' into spi-next 2015-04-11 23:09:18 +01:00
spi-ppc4xx.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-pxa2xx-dma.c spi: pxa2xx: Cleanup register access macros 2014-12-22 20:17:23 +00:00
spi-pxa2xx-pci.c spi: pxa2xx: Differentiate Intel LPSS types 2015-06-05 11:40:45 +01:00
spi-pxa2xx.c spi: pxa2xx: Constify ACPI device ids 2015-06-15 10:52:24 +01:00
spi-pxa2xx.h spi: spi-pxa2xx: remove legacy PXA DMA bits 2015-06-09 12:11:29 +01:00
spi-qup.c Merge remote-tracking branches 'spi/topic/qup', 'spi/topic/rockchip', 'spi/topic/rspi', 'spi/topic/s3c64xx' and 'spi/topic/sc18is602' into spi-next 2015-04-11 23:09:25 +01:00
spi-rb4xx.c spi: rb4xx: Fix checking return value of devm_ioremap_resource() 2015-05-01 17:35:54 +01:00
spi-rockchip.c Merge remote-tracking branches 'spi/topic/qup', 'spi/topic/rockchip', 'spi/topic/rspi', 'spi/topic/s3c64xx' and 'spi/topic/sc18is602' into spi-next 2015-04-11 23:09:25 +01:00
spi-rspi.c spi: rspi: Re-do the returning value of qspi_transfer_out_in 2015-06-02 14:58:58 +01:00
spi-s3c24xx-fiq.h
spi-s3c24xx-fiq.S
spi-s3c24xx.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-s3c64xx.c spi: s3c64xx: Constify platform_device_id 2015-05-01 17:38:16 +01:00
spi-sc18is602.c Merge remote-tracking branches 'spi/topic/qup', 'spi/topic/rockchip', 'spi/topic/rspi', 'spi/topic/s3c64xx' and 'spi/topic/sc18is602' into spi-next 2015-04-11 23:09:25 +01:00
spi-sh-hspi.c spi: Remove FSF mailing addresses 2014-12-22 15:32:42 +00:00
spi-sh-msiof.c spi: sh-msiof: Constify platform_device_id 2015-05-01 17:38:58 +01:00
spi-sh-sci.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-sh.c spi: Remove FSF mailing addresses 2014-12-22 15:32:42 +00:00
spi-sirf.c spi: sirf: add the reset for USP-based SPI 2015-05-26 11:39:16 +01:00
spi-st-ssc4.c spi: constify of_device_id array 2015-03-17 12:15:22 +00:00
spi-sun4i.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-sun6i.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-tegra20-sflash.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-tegra20-slink.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-tegra114.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-ti-qspi.c drivers: spi: ti-qspi: wait for busy bit clear before data write/read 2015-02-21 18:29:09 +09:00
spi-tle62x0.c
spi-topcliff-pch.c spi: Remove FSF mailing addresses 2014-12-22 15:32:42 +00:00
spi-txx9.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
spi-xcomm.c
spi-xilinx.c spi/xilinx: Fix access invalid memory on xilinx_spi_tx 2015-02-02 12:17:19 +00:00
spi-xtensa-xtfpga.c spi: drop owner assignment from platform_drivers 2014-10-20 16:21:36 +02:00
spi-zynqmp-gqspi.c spi: zynq: Remove execute bit 2015-06-17 17:43:45 +01:00
spi.c spi: restore rx/tx_buf in case of unset CONFIG_HAS_DMA 2015-06-02 21:54:56 +01:00
spidev.c Merge remote-tracking branches 'spi/topic/sirf', 'spi/topic/spidev' and 'spi/topic/zynq' into spi-next 2015-06-18 00:19:56 +01:00