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7410e84858
linux/drivers/spi
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Gabor Juhos 7410e84858 spi/ath79: add shutdown handler 
The SPI controller of the AR7xxx/AR9xxx SoCs
have a special mode which allows the SoC to
directly read data from SPI flash chips. In
this mode, the content of the SPI flash chip
can be accessed via a memory mapped region.

During early init time, the kernel expects
that the flash chip is accessible through
that memory region because it reads board
specific values (e.g. MAC address, WiFi
calibration data) from the flash on various
boards.

This is working if the kernel is loaded
directly by the bootloader because that
leaves the SPI controller in the special
mode. However it is not working in a kexec'd
kernel because the SPI driver does not restore
the special mode during shutdown.

The patch adds a shutdown handler to fix this
issue.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-06 10:41:12 +00:00
..
Kconfig spi/pxa2xx: allow building on a 64-bit kernel 2013-01-26 15:21:36 +08:00
Makefile spi/stmp: remove obsolete driver 2012-12-06 14:02:53 +00:00
spi-altera.c spi: remove check for bits_per_word on transfer from low level driver 2013-02-05 12:26:59 +00:00
spi-ath79.c spi/ath79: add shutdown handler 2013-02-06 10:41:12 +00:00
spi-atmel.c spi: Remove erroneous __init, __exit and __exit_p() references in drivers 2013-02-05 14:43:16 +00:00
spi-au1550.c spi: Remove erroneous __init, __exit and __exit_p() references in drivers 2013-02-05 14:43:16 +00:00
spi-bcm63xx.c spi/bcm63xx: work around inability to keep CS up 2013-02-05 17:14:33 +00:00
spi-bfin5xx.c spi: Remove erroneous __init, __exit and __exit_p() references in drivers 2013-02-05 14:43:16 +00:00
spi-bfin-sport.c spi: remove check for bits_per_word on transfer from low level driver 2013-02-05 12:26:59 +00:00
spi-bitbang-txrx.h spi: reorganize drivers 2011-06-06 01:16:30 -06:00
spi-bitbang.c Merge branch 'broonie/spi-next' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc.git 2013-02-05 12:30:13 +00:00
spi-butterfly.c spi: Add module.h to implicit users in drivers/spi 2011-10-31 19:32:17 -04:00
spi-clps711x.c spi: remove check for bits_per_word on transfer from low level driver 2013-02-05 12:26:59 +00:00
spi-coldfire-qspi.c spi: remove check for bits_per_word on transfer from low level driver 2013-02-05 12:26:59 +00:00
spi-davinci.c spi/davinci: use request_threaded_irq() to fix deadlock 2013-02-05 17:12:26 +00:00
spi-dw-mid.c dmaengine/dma_slave: introduce inline wrappers 2012-03-21 19:20:22 +05:30
spi-dw-mmio.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi-dw-pci.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi-dw.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi-dw.h spi: spi-dw: fix all sparse warnings 2011-09-21 09:41:48 -06:00
spi-ep93xx.c spi: remove check for bits_per_word on transfer from low level driver 2013-02-05 12:26:59 +00:00
spi-falcon.c spi/mips-lantiq: set SPI_MASTER_HALF_DUPLEX flag 2013-02-05 17:16:55 +00:00
spi-fsl-espi.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi-fsl-lib.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi-fsl-lib.h spi: reorganize drivers 2011-06-06 01:16:30 -06:00
spi-fsl-spi.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi-gpio.c spi: spi-gpio: Add checks for the dt properties 2013-01-26 15:35:56 +08:00
spi-imx.c spi/imx: Add MODULE_ALIAS() 2013-02-05 13:17:12 +00:00
spi-lm70llp.c spi: By default setup spi_masters with 1 chipselect and dynamics bus number 2012-05-19 23:42:08 -06:00
spi-mpc52xx-psc.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi-mpc52xx.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi-mpc512x-psc.c spi/spi-mpc512x-psc: init mode bits supported by the driver 2013-02-05 14:44:12 +00:00
spi-mxs.c mxs/spi: clear XFER_COUNT in ctrl0 field in DMA descriptor 2013-02-05 12:45:24 +00:00
spi-nuc900.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi-oc-tiny.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi-octeon.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi-omap2-mcspi.c Merge branch 'broonie/spi-next' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc.git 2013-02-05 12:30:13 +00:00
spi-omap-100k.c spi: Remove erroneous __init, __exit and __exit_p() references in drivers 2013-02-05 14:43:16 +00:00
spi-omap-uwire.c spi: Remove erroneous __init, __exit and __exit_p() references in drivers 2013-02-05 14:43:16 +00:00
spi-orion.c spi/orion: Use module_platform_driver() 2013-02-05 14:44:14 +00:00
spi-pl022.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi-ppc4xx.c spi: Remove erroneous __init, __exit and __exit_p() references in drivers 2013-02-05 14:43:16 +00:00
spi-pxa2xx-pci.c spi/pxa2xx: embed the ssp_device to platform data 2013-01-08 11:00:32 +00:00
spi-pxa2xx.c spi/pxa2xx: convert to the common clk framework 2013-01-26 15:21:37 +08:00
spi-rspi.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi-s3c24xx-fiq.h spi: reorganize drivers 2011-06-06 01:16:30 -06:00
spi-s3c24xx-fiq.S spi: reorganize drivers 2011-06-06 01:16:30 -06:00
spi-s3c24xx.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi-s3c64xx.c spi: Remove erroneous __init, __exit and __exit_p() references in drivers 2013-02-05 14:43:16 +00:00
spi-sc18is602.c spi/sc18is602: Return -EINVAL for probe failures due to I2C function mismatch 2012-08-23 12:13:54 +01:00
spi-sh-hspi.c spi/sh-hspi: fix return value check in hspi_probe(). 2012-12-19 15:11:41 +00:00
spi-sh-msiof.c spi/sh-msiof: Add device tree parsing to driver 2013-02-05 12:26:58 +00:00
spi-sh-sci.c spi: Add module.h to implicit users in drivers/spi 2011-10-31 19:32:17 -04:00
spi-sh.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi-sirf.c spi/sirf: add support for new SiRFmarco SMP SoC 2013-02-05 12:43:18 +00:00
spi-tegra20-sflash.c spi/tegra: remove checks for valid speed 2013-02-05 13:11:53 +00:00
spi-tegra20-slink.c spi/tegra: remove checks for valid speed 2013-02-05 13:11:53 +00:00
spi-ti-ssp.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi-tle62x0.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi-topcliff-pch.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi-txx9.c spi: Remove erroneous __init, __exit and __exit_p() references in drivers 2013-02-05 14:43:16 +00:00
spi-xcomm.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi-xilinx.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00
spi.c spi: Ensure memory used for spi_write_then_read() is DMA safe 2013-02-05 14:44:13 +00:00
spidev.c spi: Remove HOTPLUG section attributes 2012-12-07 17:06:43 +00:00