Vignesh R b682cffa3a spi: omap2-mcspi: Set FIFO DMA trigger level to word length ... McSPI has 32 byte FIFO in Transmit-Receive mode. Current code tries to configuration FIFO watermark level for DMA trigger to be GCD of transfer length and max FIFO size which would mean trigger level may be set to 32 for transmit-receive mode if length is aligned. This does not work in case of SPI slave mode where FIFO always needs to have data ready whenever master starts the clock. With DMA trigger size of 32 there will be a small window during slave TX where DMA is still putting data into FIFO but master would have started clock for next byte, resulting in shifting out of stale data. Similarly, on Slave RX side there may be RX FIFO overflow Fix this by setting FIFO watermark for DMA trigger to word length. This means DMA is triggered as soon as FIFO has space for word length bytes and DMA would make sure FIFO is almost always full therefore improving FIFO occupancy in both master and slave mode. Signed-off-by: Vignesh R <vigneshr@ti.com> Signed-off-by: Mark Brown <broonie@kernel.org>		2018-10-19 13:32:58 +01:00
..
internals.h	spi: Add an helper to flush the message queue	2018-04-23 15:48:18 +01:00
Kconfig	spi: spi-mem: add stm32 qspi controller	2018-10-19 13:32:56 +01:00
Makefile	spi: spi-mem: add stm32 qspi controller	2018-10-19 13:32:56 +01:00
spi-altera.c
spi-armada-3700.c
spi-ath79.c	spi: add flags parameter to txrx_word function pointers	2018-08-01 14:50:24 +01:00
spi-atmel.c	spi: Do not print a message if spi_controller_{suspend,resume}() fails	2018-09-05 12:38:27 +01:00
spi-au1550.c
spi-axi-spi-engine.c
spi-bcm-qspi.c	Merge branch 'spi-4.17' into spi-4.18 for the merge window	2018-06-04 11:51:12 +01:00
spi-bcm-qspi.h
spi-bcm63xx-hsspi.c	spi/bcm63xx-hsspi: keep pll clk enabled	2018-09-18 09:16:34 -07:00
spi-bcm63xx.c
spi-bcm2835.c
spi-bcm2835aux.c	spi: bcm2835aux: ensure interrupts are enabled for shared handler	2018-05-04 08:09:02 +09:00
spi-bitbang-txrx.h
spi-bitbang.c	spi: spi-gpio: add SPI_3WIRE support	2018-08-01 14:50:28 +01:00
spi-brcmstb-qspi.c
spi-butterfly.c	spi: add flags parameter to txrx_word function pointers	2018-08-01 14:50:24 +01:00
spi-cadence.c	spi: cadence: Fix missing clk_disable_unprepare() on error in cnds_runtime_resume()	2018-07-11 15:34:53 +01:00
spi-cavium-octeon.c
spi-cavium-thunderx.c
spi-cavium.c
spi-cavium.h
spi-clps711x.c
spi-coldfire-qspi.c
spi-davinci.c	spi: spi-davinci: Don't error when SPI_CS_WORD and cs_gpio	2018-09-18 10:40:34 -07:00
spi-dln2.c
spi-dw-mid.c
spi-dw-mmio.c	dw: spi: add support for Amazon's Alpine spi controller	2018-10-11 15:11:04 +01:00
spi-dw-pci.c
spi-dw.c	dw: spi: add support for Amazon's Alpine spi controller	2018-10-11 15:11:04 +01:00
spi-dw.h	dw: spi: add support for Amazon's Alpine spi controller	2018-10-11 15:11:04 +01:00
spi-efm32.c
spi-ep93xx.c	spi: spi-ep93xx: Use dma_data_direction for ep93xx_spi_dma_{finish,prepare}	2018-10-09 00:11:28 +01:00
spi-falcon.c
spi-fsl-cpm.c
spi-fsl-cpm.h
spi-fsl-dspi.c	spi: spi-fsl-dspi: Switch to SPDX identifier	2018-07-24 15:37:36 +01:00
spi-fsl-espi.c	spi: Do not print a message if spi_controller_{suspend,resume}() fails	2018-09-05 12:38:27 +01:00
spi-fsl-lib.c
spi-fsl-lib.h
spi-fsl-lpspi.c	spi: fsl-lpspi: Prevent FIFO under/overrun by default	2018-10-10 12:41:36 +01:00
spi-fsl-spi.c
spi-fsl-spi.h
spi-geni-qcom.c	spi: spi-geni-qcom: Add SPI driver support for GENI based QUP	2018-10-11 15:28:02 +01:00
spi-gpio.c	spi: gpio: No MISO does not imply no RX	2018-09-10 12:29:58 +01:00
spi-img-spfi.c	spi: img-spfi: Set device select bits for SPFI port state	2018-07-30 16:31:54 +01:00
spi-imx.c	spi: imx: use PIO mode if size is small	2018-10-12 18:54:02 +02:00
spi-iproc-qspi.c
spi-jcore.c
spi-lantiq-ssc.c
spi-lm70llp.c	spi: add flags parameter to txrx_word function pointers	2018-08-01 14:50:24 +01:00
spi-loopback-test.c
spi-lp8841-rtc.c
spi-mem.c	spi: spi-mem: Fix inverted logic in op sanity check	2018-09-27 23:29:57 +01:00
spi-meson-spicc.c	spi: meson-spicc: Fix error handling in meson_spicc_probe()	2018-05-02 05:59:21 +09:00
spi-meson-spifc.c
spi-mpc52xx-psc.c
spi-mpc52xx.c	spi: mpc52xx: Use gpio_is_valid()	2018-04-27 12:05:39 +01:00
spi-mpc512x-psc.c
spi-mt65xx.c	spi: mediatek: Don't modify spi_transfer when transfer.	2018-09-18 09:28:06 -07:00
spi-mxs.c	spi: mxs: Switch to SPDX identifier	2018-05-03 10:27:43 +09:00
spi-nuc900.c
spi-oc-tiny.c	treewide: devm_kzalloc() -> devm_kcalloc()	2018-06-12 16:19:22 -07:00
spi-omap-100k.c
spi-omap-uwire.c
spi-omap2-mcspi.c	spi: omap2-mcspi: Set FIFO DMA trigger level to word length	2018-10-19 13:32:58 +01:00
spi-orion.c	spi: orion: cosmetics - alias long direct_access variables	2018-09-03 15:14:18 +01:00
spi-pic32-sqi.c	spi: pic32-sqi: don't pass GFP_DMA32 to dma_alloc_coherent	2018-10-17 11:11:32 +01:00
spi-pic32.c	spi: pic32: Use proper enum in dmaengine_prep_slave_rg	2018-09-20 18:11:22 -07:00
spi-pl022.c	spi: pl022: Remove set but not used variable 'chip'	2018-09-07 17:03:48 +01:00
spi-ppc4xx.c
spi-pxa2xx-dma.c	spi: pxa2xx: Use core message processing loop	2018-04-17 17:11:30 +01:00
spi-pxa2xx-pci.c
spi-pxa2xx.c	spi: pxa2xx: Add devicetree support	2018-10-11 15:28:04 +01:00
spi-pxa2xx.h	spi: pxa2xx: Allow 64-bit DMA	2018-04-24 16:10:12 +01:00
spi-qcom-qspi.c	spi: Introduce new driver for Qualcomm QuadSPI controller	2018-10-11 15:11:09 +01:00
spi-qup.c
spi-rb4xx.c	spi: rb4xx: Use SPI_BPW_MASK to set bits_per_word_mask	2018-10-10 12:48:06 +01:00
spi-rockchip.c	spi: rockchip: simplify spi enable logic	2018-10-11 15:17:45 +01:00
spi-rspi.c	spi: use SPDX identifier for Renesas drivers	2018-08-28 20:32:00 +01:00
spi-s3c24xx-fiq.h
spi-s3c24xx-fiq.S
spi-s3c24xx.c
spi-s3c64xx.c	spi: spi-s3c64xx: Fix system resume support	2018-05-17 13:27:08 +09:00
spi-sc18is602.c
spi-sh-hspi.c	spi: use SPDX identifier for Renesas drivers	2018-08-28 20:32:00 +01:00
spi-sh-msiof.c	spi: use SPDX identifier for Renesas drivers	2018-08-28 20:32:00 +01:00
spi-sh-sci.c	spi: add flags parameter to txrx_word function pointers	2018-08-01 14:50:24 +01:00
spi-sh.c	spi: use SPDX identifier for Renesas drivers	2018-08-28 20:32:00 +01:00
spi-sirf.c
spi-slave-mt27xx.c	spi: mediatek: add spi slave for Mediatek MT2712	2018-09-28 14:29:14 +01:00
spi-slave-system-control.c	spi: slave: Fix missing break in switch	2018-10-03 16:23:10 +01:00
spi-slave-time.c
spi-sprd-adi.c	spi: sprd: Change to use devm_hwspin_lock_request_specific()	2018-06-26 13:52:27 -07:00
spi-sprd.c	spi: sprd: don't mark remove function as __exit	2018-09-27 23:26:43 +01:00
spi-st-ssc4.c
spi-stm32-qspi.c	spi: spi-mem: add stm32 qspi controller	2018-10-19 13:32:56 +01:00
spi-stm32.c	spi: stm32: Fix error handling in stm32_spi_probe()	2018-04-17 11:46:23 +01:00
spi-sun4i.c
spi-sun6i.c
spi-tegra20-sflash.c
spi-tegra20-slink.c
spi-tegra114.c
spi-test.h
spi-ti-qspi.c	spi: ti-qspi: Make sure res_mmap != NULL before dereferencing it	2018-05-17 13:36:00 +09:00
spi-tle62x0.c
spi-topcliff-pch.c
spi-txx9.c
spi-uniphier.c	spi: uniphier: remove unnecessary include headers	2018-08-02 11:08:06 +01:00
spi-xcomm.c
spi-xilinx.c
spi-xlp.c
spi-xtensa-xtfpga.c	spi: add flags parameter to txrx_word function pointers	2018-08-01 14:50:24 +01:00
spi-zynqmp-gqspi.c	spi: simplify getting .drvdata	2018-04-20 17:53:20 +01:00
spi.c	spi: Make GPIO CSs honour the SPI_NO_CS flag	2018-10-12 18:47:28 +02:00
spidev.c	spi: spidev: Fix OF tree warning logic	2018-10-10 13:46:54 +01:00