kernel/git/stable/linux.git/drivers/spi/spi-tegra.c, branch master

spi: remove completely broken Tegra driver

2012-10-01T12:29:49+00:00

The current SPI driver has many issues. Examples are: * Segfaulting on most transfers due to expecting all transfers to have both RX and TX buffers. * Hanging on TX transfers since the whole driver flow is driven by RX DMA completion, but the HW is only told to enable RX for RX transfers. * Use of clk_disable_unprepare() from atomic context. * Once those and other minor issues are fixed, the driver still doesn't actually work. * The driver also implements a deprecated API to the SPI core. For this reason, simply remove the driver completely. This has two advantages: 1) This will remove the last use of Tegra's , which will allow that file to be removed, which is required for single zImage work. 2) The downstream driver is significaly different from the current code. I believe a patch to re-add the downstream driver (with appropriate cleanup) will be much simpler to review if it's a new file rather than randomly interspered with essentially unrelated existing code. Signed-off-by: Stephen Warren Signed-off-by: Mark Brown

spi/tegra: Fix device remove function

2012-08-27T16:37:52+00:00

The call to spi_unregister_master() in the device remove function frees device memory, and with it any device local data. However, device local data is still accessed after the call to spi_unregister_master(). Acquire a reference to the SPI master device and release it after cleanup is complete to solve the problem. Signed-off-by: Guenter Roeck Signed-off-by: Mark Brown

Merge tag 'spi-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc

2012-07-26T19:57:41+00:00

Pull spi updates from Mark Brown: "Since Grant is even more specacularly busy than usual for the time being I've been collecting SPI patches for him for this release - probably things will revert back to Grant before the next release. There's nothing too exciting here, mostly it's simple driver specific stuff: - Add spi: to the modaliases of SPI devices to provide namespacing. - A driver for AD-FMCOMMS1-EBZ. - DT binding for Orion. - Fixes and cleanups for i.MX, PL0022, OMAP and bitbang drivers. There may be a few more fixes I've missed, people keep sending me new things." * tag 'spi-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc: spi/orion: remove uneeded spi_info spi/bcm63xx: fix clock configuration selection spi/orion: add device tree binding spi/omap2: mark omap2_mcspi_master_setup as __devinit spi: omap2-mcspi: Fix the below warning spi: Add AD-FMCOMMS1-EBZ I2C-SPI bridge driver spi/imx: use gpio_is_valid to determine if a gpio is valid spi/imx: remove redundant config.speed_hz setting spi/gpio: start with CS non-active spi: tegra: use dmaengine based dma driver spi/pl022: cleanup pl022 header documentation spi/pl022: enable runtime PM spi/pl022: delete DB5500 support spi/pl022: disable port when unused spi: Add "spi:" prefix to modalias attribute of spi devices

spi: tegra: use dmaengine based dma driver

2012-07-10T14:28:56+00:00

Use the dmaengine based Tegra APB DMA driver for data transfer between SPI FIFO and memory in place of legacy Tegra APB DMA. The new driver is selected if legacy driver is not selected and new DMA driver is enabled through config file. Signed-off-by: Laxman Dewangan Acked-by: Stephen Warren Signed-off-by: Mark Brown

spi/tegra: add clk_prepare/clk_unprepare

2012-06-12T16:32:54+00:00

Use clk_prepare/clk_unprepare as required by the generic clk framework. Cc: grant.likely@secretlab.ca cc: spi-devel-general@lists.sourceforge.net Signed-off-by: Prashant Gaikwad Signed-off-by: Stephen Warren

drivercore: Add helper macro for platform_driver boilerplate

2011-10-24T22:35:47+00:00

For simple modules that contain a single platform_driver without any additional setup code then ends up being a block of duplicated boilerplate. This patch adds a new macro, module_platform_driver(), which replaces the module_init()/module_exit() registrations with template functions. Signed-off-by: Grant Likely Acked-by: Greg Kroah-Hartman Reviewed-by: Magnus Damm Reviewed-by: Mark Brown Reviewed-by: Stephen Boyd

spi/tegra: fix compilation error in spi-tegra.c

2011-10-14T22:41:04+00:00

Add #include to spi-tegra.c to fix a compilation error after the removal of module.h from device.h (in patch: "include: replace linux/module.h with "struct module" wherever possible"). Signed-off-by: Marc Dietrich Acked-by: Olof Johansson Signed-off-by: Grant Likely

spi/tegra: Use engineering names in DT compatible property

2011-07-06T05:38:30+00:00

Engineering names are more stable than marketing names. Hence, use them for Device Tree compatible properties instead. Signed-off-by: Stephen Warren Signed-off-by: Grant Likely

gpio/tegra: Move Tegra gpio driver to drivers/gpio

2011-06-15T18:59:20+00:00

As part of the gpio driver consolidation, this patch moves the Tegra driver into drivers/gpio Signed-off-by: Grant Likely

spi: Convert uses of struct resource * to resource_size(ptr)

2011-06-11T05:43:41+00:00

Done via coccinelle scripts like: @@ struct resource *ptr; @@ - ptr->end - ptr->start + 1 + resource_size(ptr) and some grep and typing. Mostly uncompiled, no cross-compilers. Signed-off-by: Joe Perches Signed-off-by: Grant Likely