linux-dev - Linux kernel development work

Age	Commit message (Collapse)	Author	Files	Lines
2017-10-31	spi: spi-axi: fix potential use-after-free after deregistration	Johan Hovold	1	-1/+3
	Take an extra reference to the controller before deregistering it to prevent use-after-free in the interrupt handler in case an interrupt fires before the line is disabled. Fixes: b1353d1c1d45 ("spi: Add Analog Devices AXI SPI Engine controller support") Acked-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-01-09	spi: spi-axi: Free resources on error path	Christophe JAILLET	1	-1/+2
	We should go to 'err_put_master' here instead of returning directly. Otherwise a call to 'spi_master_put' is missing. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Acked-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-11-23	spi: spi-axi: Fix module autoload	Javier Martinez Canillas	1	-0/+1
	If the driver is built as a module, autoload won't work because the module alias information is not filled. So user-space can't match the registered device with the corresponding module. Export the module alias information using the MODULE_DEVICE_TABLE() macro. Before this patch: $ modinfo drivers/spi/spi-axi-spi-engine.ko \| grep alias $ After this patch: $ modinfo drivers/spi/spi-axi-spi-engine.ko \| grep alias alias: of:NTCadi,axi-spi-engine-1.00.aC* alias: of:NTCadi,axi-spi-engine-1.00.a Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-26	spi: Drop duplicate code to set master->dev.parent	Axel Lin	1	-1/+0
	It's done by spi_alloc_master(). Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-05	spi: Add Analog Devices AXI SPI Engine controller support	Lars-Peter Clausen	1	-0/+591
	This patch adds support for the AXI SPI Engine controller which is a FPGA soft-peripheral which is used in some of Analog Devices' reference designs. The AXI SPI Engine controller is part of the SPI Engine framework[1] and allows memory mapped access to the SPI Engine control bus. This allows it to be used as a general purpose software driven SPI controller. The SPI Engine in addition offers some optional advanced acceleration and offloading capabilities, which are not part of this patch though and will be introduced separately. At the core of the SPI Engine framework is a small sort of co-processor that accepts a command stream and turns the commands into low-level SPI transactions. Communication is done through three memory mapped FIFOs in the register map of the AXI SPI Engine peripheral. One FIFO for the command stream and one each for transmit and receive data. The driver translates a spi_message in a command stream and writes it to the peripheral which executes it asynchronously. This allows it to perform very precise timings which are required for some SPI slave devices to achieve maximum performance (e.g. analog-to-digital and digital-to-analog converters). The execution flow is synchronized to the host system by a special synchronize instruction which generates a interrupt. [1] https://wiki.analog.com/resources/fpga/peripherals/spi_engine Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Mark Brown <broonie@kernel.org>