kernel/include/linux/spi/pxa2xx_spi.h, branch linux-4.15.y

ARM: pxa: Remove unused clock_enable field from struct pxa2xx_spi_master

2015-09-20T17:37:20Z

Use for struct pxa2xx_spi_master clock_enable field was removed years ago from the pxa2xx-spi driver by the commit 2f1a74e5a2de ("[ARM] pxa: make pxa2xx_spi driver use ssp_request()/ssp_free()"). Therefore remove it from structure definition, documentation and from couple affected board files. Signed-off-by: Jarkko Nikula Acked-by: Mark Brown Signed-off-by: Robert Jarzmik

Merge remote-tracking branches 'spi/topic/orion', 'spi/topic/pxa2xx', 'spi/topic/qup', 'spi/topic/rockchip' and 'spi/topic/samsung' into spi-next

2015-02-08T03:16:55Z

spi: spi-pxa2xx: only include mach/dma.h for legacy DMA

2015-02-04T20:14:26Z

Move the include of mach/dma.h to the legacy PXA DMA code where it is used. This enables building spi-pxa2xx on ARM64. Signed-off-by: Rob Herring Signed-off-by: Mark Brown

spi: Remove FSF mailing addresses

2014-12-22T15:32:42Z

Signed-off-by: Jarkko Nikula Signed-off-by: Mark Brown

spi/pxa2xx: Don't use slave_id of dma_slave_config

2014-09-18T06:24:07Z

That field has been deprecated in favour of getting the necessary information from ACPI/DT. However, we still need to deal systems that are PCI only (no ACPI to back up). In order to support such systems, we allow the DMA filter function and its corresponding parameter via pxa2xx_spi_master platform data. Then when the pxa2xx_spi_dma_setup() doesn't find the channel via ACPI, it falls back to use the given filter function. Suggested-by: Arnd Bergmann Signed-off-by: Mika Westerberg Signed-off-by: Andy Shevchenko Acked-by: Mark Brown Signed-off-by: Vinod Koul

spi/pxa2xx: add support for Intel Low Power Subsystem SPI

2013-02-08T13:14:40Z

Intel LPSS SPI is pretty much the same as the PXA27xx SPI except that it has few additional features over the original: o FIFO depth is 256 entries o RX FIFO has one watermark o TX FIFO has two watermarks, low and high o chip select can be controlled by writing to a register The new FIFO registers follow immediately the PXA27xx registers but then there are some additional LPSS private registers at offset 1k or 2k from the base address. For these private registers we add new accessors that take advantage of drv_data->lpss_base once it is resolved. We add a new type LPSS_SSP that can be used to distinguish the LPSS devices from others. Signed-off-by: Mika Westerberg Tested-by: Lu Cao Signed-off-by: Mark Brown

spi/pxa2xx: add support for DMA engine

2013-02-08T12:15:28Z

To be able to use DMA with this driver on non-PXA platforms we implement support for the generic DMA engine API. This lets user to use different DMA engines with little or no modification to the driver. Request lines and channel numbers can be passed to the driver from the platform specific data. The DMA engine implementation will be selected by default even on PXA platform. User can select the legacy DMA API by enabling Kconfig option CONFIG_SPI_PXA2XX_PXADMA. Signed-off-by: Mika Westerberg Acked-by: Linus Walleij Tested-by: Lu Cao Signed-off-by: Mark Brown

spi/pxa2xx: break out the private DMA API usage into a separate file

2013-02-08T12:15:21Z

The PXA SPI driver uses PXA platform specific private DMA implementation which does not work on non-PXA platforms. In order to use this driver on other platforms we break out the private DMA implementation into a separate file that gets compiled only when CONFIG_SPI_PXA2XX_PXADMA is set. The DMA functions are stubbed out if there is no DMA implementation selected (i.e we are building on non-PXA platform). While we are there we can kill the dummy DMA bits in pxa2xx_spi.h as they are not needed anymore for CE4100. Once this is done we can add the generic DMA engine support to the driver that allows usage of any DMA controller that implements DMA engine API. Signed-off-by: Mika Westerberg Acked-by: Linus Walleij Tested-by: Lu Cao Signed-off-by: Mark Brown

spi/pxa2xx: convert to the common clk framework

2013-01-26T07:21:37Z

Convert clk_enable() to clk_prepare_enable() and clk_disable() to clk_disable_unprepare() respectively in order to support the common clk framework. Otherwise we get warnings on the console as the clock is not prepared before it is enabled. In addition we must cache the maximum clock rate to drv_data->max_clk_rate at probe time because clk_get_rate() cannot be called in tasklet context. Signed-off-by: Mika Westerberg Signed-off-by: Mark Brown

spi/pxa2xx: embed the ssp_device to platform data

2013-01-08T11:00:32Z

The spi-pxa2xx-pci glue driver had to implement pxa_ssp_request()/free() in order to support the spi-pxa2xx platform driver. Since the ACPI enabled platforms can use the same platform driver we would need to implement pxa_ssp_request()/free() in some central place that can be shared by the ACPI and PCI glue code. Instead of doing that we can make pxa_ssp_request()/free() to be available only when CONFIG_ARCH_PXA is set. On other arches these are being stubbed out in preference to passing the ssp_device from the platform data directly. We also change the SPI bus number to be taken from ssp->port_id instead of platform device id. This way the supporting code that passes the ssp can decide the number (or it can set it to the same as pdev->id). Signed-off-by: Mika Westerberg Signed-off-by: Mark Brown