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linux-stable/drivers/spi
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Naveen Krishna Chatradhi 306972cedf spi: s3c64xx: use the generic SPI "cs-gpios" property 
The s3c64xx SPI driver uses a custom DT binding to specify
the GPIO used to drive the chip select (CS) line instead of
using the generic "cs-gpios" property already defined in:
Documentation/devicetree/bindings/spi/spi-bus.txt.

It's unfortunate that drivers are not using standard bindings
and creating custom ones instead but in most cases this can't
be changed without breaking Device Tree backward compatibility.

But in the case of this driver, its DT binding has been broken
for more than a year. Since after commit (dated June, 21 2013):

3146bee ("spi: s3c64xx: Added provision for dedicated cs pin")

DT backward compatibility was broken and nobody noticed until
now when the commit was reverted. So it seems to be safe to
change the binding to use the standard SPI "cs-gpios" property
instead of using a custom one just for this driver.

This patch also allows boards that don't use a GPIO pin for the
CS to work with the driver since the SPI core will take care of
setting spi->cs_gpio to -ENOENT if a board wants to use the built
in CS instead of a GPIO as explained in the SPI bus DT binding:
Documentation/devicetree/bindings/spi/spi-bus.txt.

For non-DT platforms, spi->cs_gpio will be set to -ENOENT as well
unless they specify a GPIO pin in their platform data. So both
native and GPIO chip select is also supported for legacy boards.

The above use case was what motivated commit 3146bee which broke
the DT binding backward compatibility in the first place.

Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
[javier.martinez@collabora.co.uk: split changes and improve commit message]
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-07-17 19:37:49 +01:00
..
Kconfig Merge remote-tracking branches 'spi/topic/adi', 'spi/topic/atmel' and 'spi/topic/cadence' into spi-next 2014-06-02 17:08:35 +01:00
Makefile Merge remote-tracking branches 'spi/topic/adi', 'spi/topic/atmel' and 'spi/topic/cadence' into spi-next 2014-06-02 17:08:35 +01:00
spi-adi-v3.c spi: spi-adi-v3: convert to use common clk framework 2014-04-14 17:45:25 +01:00
spi-altera.c Merge remote-tracking branches 'spi/topic/imx', 'spi/topic/init', 'spi/topic/mpc512x-psc', 'spi/topic/mpc52xx', 'spi/topic/mxs', 'spi/topic/nuc900', 'spi/topic/oc-tiny' and 'spi/topic/octeon' into spi-next 2014-03-30 00:51:17 +00:00
spi-ath79.c spi: Remove unneeded include of linux/workqueue.h 2014-04-14 17:20:15 +01:00
spi-atmel.c Merge remote-tracking branches 'spi/topic/adi', 'spi/topic/atmel' and 'spi/topic/cadence' into spi-next 2014-06-02 17:08:35 +01:00
spi-au1550.c Merge branch 'mips-for-linux-next' of git://git.linux-mips.org/pub/scm/ralf/upstream-sfr 2014-04-02 13:40:50 -07:00
spi-bcm63xx-hsspi.c spi: Remove unneeded include of linux/workqueue.h 2014-04-14 17:20:15 +01:00
spi-bcm63xx.c spi: Remove unneeded include of linux/workqueue.h 2014-04-14 17:20:15 +01:00
spi-bcm2835.c spi: Remove explictly set bus_num and num_chipselect to default setting 2014-02-16 09:51:02 +08:00
spi-bfin-sport.c spi: delete non-required instances of include <linux/init.h> 2014-02-03 12:20:35 +00:00
spi-bfin5xx.c spi: bfin5xx: fix build error 2014-04-14 20:44:15 +01:00
spi-bitbang-txrx.h spi: bitbang: Grammar s/make to make/to make/ 2014-01-13 11:24:21 +00:00
spi-bitbang.c Merge remote-tracking branches 'spi/topic/imx', 'spi/topic/init', 'spi/topic/mpc512x-psc', 'spi/topic/mpc52xx', 'spi/topic/mxs', 'spi/topic/nuc900', 'spi/topic/oc-tiny' and 'spi/topic/octeon' into spi-next 2014-03-30 00:51:17 +00:00
spi-butterfly.c spi: bitbang: Make spi_bitbang_stop() return void 2014-03-29 11:09:26 +00:00
spi-cadence.c spi: Add driver for Cadence SPI controller 2014-04-14 21:00:28 +01:00
spi-clps711x.c Merge remote-tracking branches 'spi/topic/imx', 'spi/topic/init', 'spi/topic/mpc512x-psc', 'spi/topic/mpc52xx', 'spi/topic/mxs', 'spi/topic/nuc900', 'spi/topic/oc-tiny' and 'spi/topic/octeon' into spi-next 2014-03-30 00:51:17 +00:00
spi-coldfire-qspi.c Merge remote-tracking branches 'spi/topic/bus-num', 'spi/topic/cleanup', 'spi/topic/clps711x', 'spi/topic/coldfire', 'spi/topic/completion' and 'spi/topic/davinci' into spi-next 2014-03-30 00:51:03 +00:00
spi-davinci.c spi: davinci: Use of_match_ptr at appropriate place 2014-02-06 12:52:59 +00:00
spi-dw-mid.c dmaengine: remove DMA unmap flags 2013-11-14 11:04:38 -08:00
spi-dw-mmio.c spi: dw: add support for gpio controlled chip select 2014-04-24 18:09:05 +01:00
spi-dw-pci.c Merge remote-tracking branches 'spi/topic/fsl-espi', 'spi/topic/gpio', 'spi/topic/hspi', 'spi/topic/mpc512x', 'spi/topic/msiof', 'spi/topic/nuc900', 'spi/topic/oc-tiny', 'spi/topic/omap', 'spi/topic/orion' and 'spi/topic/pci' into spi-linus 2014-01-23 13:07:09 +00:00
spi-dw.c spi: dw: Remove unused dw_spi_cleanup function 2014-05-12 22:04:18 +01:00
spi-dw.h spi: dw: add support for gpio controlled chip select 2014-04-24 18:09:05 +01:00
spi-efm32.c Merge remote-tracking branches 'spi/topic/drivers', 'spi/topic/dw', 'spi/topic/efm32', 'spi/topic/ep93xx', 'spi/topic/fsl', 'spi/topic/fsl-dspi', 'spi/topic/fsl-espi' and 'spi/topic/gpio' into spi-next 2014-03-30 00:51:10 +00:00
spi-ep93xx.c spi: ep93xx: Convert to let spi core handle checking transfer speed 2014-02-14 20:24:53 +00:00
spi-falcon.c spi: Remove unneeded include of linux/workqueue.h 2014-04-14 17:20:15 +01:00
spi-fsl-cpm.c DeviceTree updates for 3.13. This is a bit larger pull request than 2013-11-12 16:52:17 +09:00
spi-fsl-cpm.h
spi-fsl-dspi.c spi: fsl-dspi: Make of_device_id array const 2014-05-07 20:53:04 +01:00
spi-fsl-espi.c Merge remote-tracking branches 'spi/topic/dw', 'spi/topic/fsl', 'spi/topic/fsl-espi' and 'spi/topic/id-const' into spi-next 2014-06-02 17:08:38 +01:00
spi-fsl-lib.c spi: fsl: Kill mpc8xxx_spi_cleanup and convert fsl_espi_setup to use devm_kzalloc 2014-04-14 17:18:55 +01:00
spi-fsl-lib.h spi: fsl: Kill mpc8xxx_spi_cleanup and convert fsl_espi_setup to use devm_kzalloc 2014-04-14 17:18:55 +01:00
spi-fsl-spi.c spi: fsl-spi: Fix memory leak 2014-04-14 17:18:55 +01:00
spi-fsl-spi.h
spi-gpio.c spi: spi-gpio: Make of_device_id array const 2014-05-07 20:53:04 +01:00
spi-imx.c Merge remote-tracking branches 'spi/topic/imx', 'spi/topic/init', 'spi/topic/mpc512x-psc', 'spi/topic/mpc52xx', 'spi/topic/mxs', 'spi/topic/nuc900', 'spi/topic/oc-tiny' and 'spi/topic/octeon' into spi-next 2014-03-30 00:51:17 +00:00
spi-lm70llp.c spi: bitbang: Let spi_bitbang_start() take a reference to master 2013-10-07 14:50:43 +01:00
spi-mpc52xx-psc.c Merge remote-tracking branches 'spi/fix/complete', 'spi/fix/efm32', 'spi/fix/omap2-mcspi' and 'spi/fix/qup' into spi-linus 2014-04-10 23:39:52 +01:00
spi-mpc52xx.c Merge remote-tracking branches 'spi/fix/complete', 'spi/fix/efm32', 'spi/fix/omap2-mcspi' and 'spi/fix/qup' into spi-linus 2014-04-10 23:39:52 +01:00
spi-mpc512x-psc.c Merge remote-tracking branches 'spi/fix/complete', 'spi/fix/efm32', 'spi/fix/omap2-mcspi' and 'spi/fix/qup' into spi-linus 2014-04-10 23:39:52 +01:00
spi-mxs.c Merge remote-tracking branches 'spi/topic/imx', 'spi/topic/init', 'spi/topic/mpc512x-psc', 'spi/topic/mpc52xx', 'spi/topic/mxs', 'spi/topic/nuc900', 'spi/topic/oc-tiny' and 'spi/topic/octeon' into spi-next 2014-03-30 00:51:17 +00:00
spi-nuc900.c spi: Remove unneeded include of linux/workqueue.h 2014-04-14 17:20:15 +01:00
spi-oc-tiny.c Merge remote-tracking branches 'spi/topic/imx', 'spi/topic/init', 'spi/topic/mpc512x-psc', 'spi/topic/mpc52xx', 'spi/topic/mxs', 'spi/topic/nuc900', 'spi/topic/oc-tiny' and 'spi/topic/octeon' into spi-next 2014-03-30 00:51:17 +00:00
spi-octeon.c Merge remote-tracking branches 'spi/topic/imx', 'spi/topic/init', 'spi/topic/mpc512x-psc', 'spi/topic/mpc52xx', 'spi/topic/mxs', 'spi/topic/nuc900', 'spi/topic/oc-tiny' and 'spi/topic/octeon' into spi-next 2014-03-30 00:51:17 +00:00
spi-omap-100k.c spi: omap-100k: Fix memory leak 2014-03-29 10:01:13 +00:00
spi-omap-uwire.c spi: Remove unneeded include of linux/workqueue.h 2014-04-14 17:20:15 +01:00
spi-omap2-mcspi.c Merge remote-tracking branches 'spi/fix/complete', 'spi/fix/efm32', 'spi/fix/omap2-mcspi' and 'spi/fix/qup' into spi-linus 2014-04-10 23:39:52 +01:00
spi-orion.c Merge remote-tracking branches 'spi/topic/omap-uwire', 'spi/topic/omap100k', 'spi/topic/omap2', 'spi/topic/orion', 'spi/topic/pl022', 'spi/topic/qup', 'spi/topic/rspi' and 'spi/topic/s3c24xx' into spi-next 2014-03-30 00:51:27 +00:00
spi-pl022.c spi: pl022: remove unnecessary OOM messages 2014-04-29 12:01:41 -07:00
spi-ppc4xx.c spi: delete non-required instances of include <linux/init.h> 2014-02-03 12:20:35 +00:00
spi-pxa2xx-dma.c spi/pxa2xx: Prevent DMA from transferring too many bytes 2014-05-12 22:05:37 +01:00
spi-pxa2xx-pci.c spi/pxa2xx-pci: Add PCI mode support for BayTrail LPSS SPI 2014-04-18 18:06:07 +01:00
spi-pxa2xx-pxadma.c spi: delete non-required instances of include <linux/init.h> 2014-02-03 12:20:35 +00:00
spi-pxa2xx.c Merge remote-tracking branch 'spi/topic/workqueue' into spi-next 2014-06-02 17:08:43 +01:00
spi-pxa2xx.h
spi-qup.c Merge remote-tracking branches 'spi/topic/dw', 'spi/topic/fsl', 'spi/topic/fsl-espi' and 'spi/topic/id-const' into spi-next 2014-06-02 17:08:38 +01:00
spi-rspi.c spi: rspi: Extract rspi_common_transfer() 2014-06-02 15:49:36 +01:00
spi-s3c24xx-fiq.h
spi-s3c24xx-fiq.S
spi-s3c24xx.c Merge remote-tracking branch 'spi/topic/workqueue' into spi-next 2014-06-02 17:08:43 +01:00
spi-s3c64xx.c spi: s3c64xx: use the generic SPI "cs-gpios" property 2014-07-17 19:37:49 +01:00
spi-sc18is602.c spi: sc18is602: Convert to let spi core validate transfer speed 2014-03-13 09:47:05 +00:00
spi-sh-hspi.c spi: sh-hspi: Do not specifically request shyway_clk clock 2014-04-14 21:14:54 +01:00
spi-sh-msiof.c spi: sh-msiof: remove unnecessary OOM messages 2014-04-29 12:01:41 -07:00
spi-sh-sci.c spi: Remove unneeded include of linux/workqueue.h 2014-04-14 17:20:15 +01:00
spi-sh.c spi: Always check complete callback before calling it 2014-04-03 11:13:38 +01:00
spi-sirf.c spi: sirf: decrease the interrupt count and latency of PIO mode 2014-05-20 23:24:20 +01:00
spi-sun4i.c spi: Remove unneeded include of linux/workqueue.h 2014-04-14 17:20:15 +01:00
spi-sun6i.c spi: Remove unneeded include of linux/workqueue.h 2014-04-14 17:20:15 +01:00
spi-tegra20-sflash.c spi: tegra20-sflash: Make of_device_id array const 2014-05-07 20:53:05 +01:00
spi-tegra20-slink.c spi: tegra20-slink: Make of_device_id array const 2014-05-07 20:53:05 +01:00
spi-tegra114.c spi: tegra114: Make of_device_id array const 2014-05-07 20:53:05 +01:00
spi-ti-qspi.c Merge remote-tracking branches 'spi/topic/sunxi', 'spi/topic/tegra114', 'spi/topic/ti-qspi', 'spi/topic/ti-ssp', 'spi/topic/topcliff-pch', 'spi/topic/txx9', 'spi/topic/xcomm' and 'spi/topic/xfer' into spi-next 2014-03-30 00:51:41 +00:00
spi-tle62x0.c spi: tle62x0: remove unnecessary OOM messages 2014-04-29 12:01:42 -07:00
spi-topcliff-pch.c spi: topcliff-pch: remove unnecessary OOM messages 2014-04-29 12:01:42 -07:00
spi-txx9.c Merge remote-tracking branches 'spi/fix/complete', 'spi/fix/efm32', 'spi/fix/omap2-mcspi' and 'spi/fix/qup' into spi-linus 2014-04-10 23:39:52 +01:00
spi-xcomm.c Merge remote-tracking branches 'spi/topic/sunxi', 'spi/topic/tegra114', 'spi/topic/ti-qspi', 'spi/topic/ti-ssp', 'spi/topic/topcliff-pch', 'spi/topic/txx9', 'spi/topic/xcomm' and 'spi/topic/xfer' into spi-next 2014-03-30 00:51:41 +00:00
spi-xilinx.c Merge remote-tracking branches 'spi/topic/xilinx' and 'spi/topic/xtfpga' into spi-next 2014-03-30 00:51:48 +00:00
spi-xtensa-xtfpga.c spi: add xtfpga SPI controller driver 2014-03-13 09:12:44 +00:00
spi.c Merge remote-tracking branch 'spi/topic/dt' into spi-next 2014-06-02 17:08:35 +01:00
spidev.c spi: spidev: Add support for Dual/Quad SPI Transfers 2014-02-27 13:51:29 +09:00