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linux/drivers/spi
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Douglas Anderson 6d66507d9b
spi: spi-geni-qcom: Don't wait to start 1st transfer if transmitting 
If we're sending bytes over SPI, we know the FIFO is empty at the
start of the transfer.  There's no reason to wait for the interrupt
telling us to start--we can just start right away.  Then if we
transmit everything in one swell foop we don't even need to bother
listening for TX interrupts.

In a test of "flashrom -p ec -r /tmp/foo.bin" interrupts were reduced
from ~30560 to ~29730, about a 3% savings.

This patch looks bigger than it is because I moved a few functions
rather than adding a forward declaration.  The only actual change to
geni_spi_handle_tx() was to make it return a bool indicating if there
is more to tx.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Akash Asthana <akashast@codeaurora.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20200912111716.1.Ied5e843fad0d6b733a1fb8bcfb364dd2fa889eb3@changeid
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-14 15:50:16 +01:00
..
atmel-quadspi.c
spi: atmel-quadspi: Use optimezed memcpy_fromio()/memcpy_toio()
2020-07-17 00:55:24 +01:00
internals.h
…
Kconfig
spi: qup: Allow for compile-testing on !ARM
2020-09-07 19:04:23 +01:00
Makefile
Merge series "mtd: spi-nor: Move cadence-qaudspi to spi-mem framework" from Vignesh Raghavendra <vigneshr@ti.com>:
2020-06-19 14:26:55 +01:00
spi-altera.c
spi: altera: fix module autoload
2020-06-24 16:37:47 +01:00
spi-amd.c
spi: spi-amd: Do not define 'struct acpi_device_id' when !CONFIG_ACPI
2020-07-17 16:38:56 +01:00
spi-ar934x.c
spi: add driver for ar934x spi controller
2020-02-11 11:37:30 +00:00
spi-armada-3700.c
spi: a3700: Remove a useless memset
2020-08-18 17:52:37 +01:00
spi-at91-usart.c
spi: spi-at91-usart: Remove unused OF table 'struct of_device_id'
2020-07-17 16:38:54 +01:00
spi-ath79.c
spi: ath79: use devm_platform_ioremap_resource() to simplify code
2019-09-04 17:15:29 +01:00
spi-atmel.c
spi: atmel: Simplify with dev_err_probe()
2020-09-08 18:19:24 +01:00
spi-au1550.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
2019-05-30 11:26:37 -07:00
spi-axi-spi-engine.c
spi: spi-axi-spi-engine: Access register after clock initialization
2020-04-09 18:46:53 +01:00
spi-bcm63xx-hsspi.c
spi: bcm63xx-hsspi: add reset support
2020-06-17 14:29:58 +01:00
spi-bcm63xx.c
spi: bcm63xx-spi: add reset support
2020-06-17 14:29:58 +01:00
spi-bcm2835.c
spi: bcm2835: Make polling_limit_us static
2020-09-14 15:50:15 +01:00
spi-bcm2835aux.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
spi-bcm-qspi.c
spi: bcm-qspi: Clean up 7425, 7429, and 7435 settings
2020-09-14 15:50:08 +01:00
spi-bcm-qspi.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 459
2019-06-19 17:09:09 +02:00
spi-bitbang-txrx.h
…
spi-bitbang.c
spi: spi-bitbang: Demote obvious misuse of kerneldoc to standard comment blocks
2020-07-17 16:38:45 +01:00
spi-brcmstb-qspi.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 459
2019-06-19 17:09:09 +02:00
spi-butterfly.c
spi: docs: convert to ReST and add it to the kABI bookset
2019-07-31 14:13:13 -06:00
spi-cadence-quadspi.c
spi: cadence-quadspi: Simplify with dev_err_probe()
2020-09-08 18:19:26 +01:00
spi-cadence.c
spi: spi-cadence: add support for chip select high
2020-07-22 01:55:51 +01:00
spi-cavium-octeon.c
spi: octeon: use devm_platform_ioremap_resource() to simplify code
2019-09-04 17:17:27 +01:00
spi-cavium-thunderx.c
spi: spi-cavium-thunderx: flag controller as half duplex
2020-06-16 00:38:39 +01:00
spi-cavium.c
spi: use new spi_transfer_delay_exec helper where straightforward
2019-10-15 11:51:57 +01:00
spi-cavium.h
…
spi-clps711x.c
spi: clps711x: use devm_platform_ioremap_resource() to simplify code
2019-09-04 17:17:36 +01:00
spi-coldfire-qspi.c
spi: coldfire-qspi: Use clk_prepare_enable and clk_disable_unprepare
2020-07-17 00:55:26 +01:00
spi-davinci.c
Remove uninitialized_var() macro for v5.9-rc1
2020-08-04 13:49:43 -07:00
spi-dln2.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 372
2019-06-05 17:37:10 +02:00
spi-dw-core.c
spi: dw: Add support for RX sample delay register
2020-09-08 16:15:36 +01:00
spi-dw-dma.c
spi: dw-dma: Fix Tx DMA channel working too fast
2020-07-21 23:43:24 +01:00
spi-dw-mmio.c
spi: dw: Add Microchip Sparx5 support
2020-09-08 16:15:37 +01:00
spi-dw-pci.c
spi: dw: Cleanup generic DW DMA code namings
2020-05-29 15:55:52 +01:00
spi-dw.h
spi: dw: Add support for RX sample delay register
2020-09-08 16:15:36 +01:00
spi-efm32.c
spi: efm32: Convert to use GPIO descriptors
2020-03-27 15:52:23 +00:00
spi-ep93xx.c
spi: spi-ep93xx: Fix API slippage
2020-07-17 16:38:47 +01:00
spi-falcon.c
spi: spi-falcon: extend warning to delay as well
2019-10-15 11:46:57 +01:00
spi-fsi.c
spi: Add FSI-attached SPI controller driver
2020-03-10 14:11:57 +00:00
spi-fsl-cpm.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
spi-fsl-cpm.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
spi-fsl-dspi.c
spi: spi-fsl-dspi: use XSPI mode instead of DMA for DPAA2 SoCs
2020-09-14 15:50:14 +01:00
spi-fsl-espi.c
spi: spi-fsl-espi: Remove use of %p
2020-08-25 22:46:50 +01:00
spi-fsl-lib.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
spi-fsl-lib.h
spi: fsl: Convert to use CS GPIO descriptors
2019-08-28 14:10:41 +01:00
spi-fsl-lpspi.c
spi: lpspi: Remove CONFIG_PM_SLEEP ifdefery
2020-08-18 17:52:36 +01:00
spi-fsl-qspi.c
spi: Fix SPI NOR and SPI NAND acronyms
2020-07-17 00:55:25 +01:00
spi-fsl-spi.c
spi: fsl: add missing __iomem annotation
2020-07-01 23:21:26 +01:00
spi-fsl-spi.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
spi-geni-qcom.c
spi: spi-geni-qcom: Don't wait to start 1st transfer if transmitting
2020-09-14 15:50:16 +01:00
spi-gpio.c
Merge branch 'for-5.4' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-5.5
2019-10-08 19:12:28 +01:00
spi-hisi-sfc-v3xx.c
spi: hisi-sfc-v3xx: add error check after per operation
2020-04-17 14:21:00 +01:00
spi-img-spfi.c
spi: img-spfi: Convert to use GPIO descriptors
2020-07-01 23:21:29 +01:00
spi-imx.c
spi: imx: Remove unneeded probe message
2020-08-20 22:47:11 +01:00
spi-iproc-qspi.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174
2019-05-30 11:26:41 -07:00
spi-jcore.c
remove ioremap_nocache and devm_ioremap_nocache
2020-01-06 09:45:59 +01:00
spi-lantiq-ssc.c
sound updates for 5.9
2020-08-06 14:27:31 -07:00
spi-lm70llp.c
spi: docs: convert to ReST and add it to the kABI bookset
2019-07-31 14:13:13 -06:00
spi-loopback-test.c
spi: spi-loopback-test: Fix formatting issues in function header blocks
2020-07-17 16:38:44 +01:00
spi-lp8841-rtc.c
spi: lp-8841: use devm_platform_ioremap_resource() to simplify code
2019-09-04 17:18:35 +01:00
spi-mem.c
spi: spi-mem: allow specifying a command's extension
2020-07-14 17:29:38 +01:00
spi-meson-spicc.c
spi: spi-meson-spicc: Remove set but never used variable 'data' from meson_spicc_reset_fifo()
2020-07-17 16:38:48 +01:00
spi-meson-spifc.c
spi: spi-meson-spifc: Fix misdocumenting of 'dev' in 'struct meson_spifc'
2020-07-17 16:38:48 +01:00
spi-mpc52xx-psc.c
spi: use new spi_transfer_delay_exec helper where straightforward
2019-10-15 11:51:57 +01:00
spi-mpc52xx.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428
2019-06-05 17:37:16 +02:00
spi-mpc512x-psc.c
spi: use new spi_transfer_delay_exec helper where straightforward
2019-10-15 11:51:57 +01:00
spi-mt65xx.c
spi: mediatek: add spi support for mt8192 IC
2020-07-22 01:56:00 +01:00
spi-mt7621.c
spi: mt7621: use devm_platform_ioremap_resource() to simplify code
2019-09-04 17:19:34 +01:00
spi-mtk-nor.c
spi: spi-mtk-nor: support standard spi properties
2020-09-08 18:19:32 +01:00
spi-mux.c
spi: spi-mux: Simplify with dev_err_probe()
2020-09-08 18:19:27 +01:00
spi-mxic.c
spi: spi-mem: allow specifying a command's extension
2020-07-14 17:29:38 +01:00
spi-mxs.c
spi: mxs: Drop GPIO includes
2020-03-17 13:20:16 +00:00
spi-npcm-fiu.c
spi: npcm-fiu: Reuse BITS_PER_BYTE definition
2020-06-19 13:43:08 +01:00
spi-npcm-pspi.c
spi: npcm-pspi: Convert to use GPIO descriptors
2020-07-01 23:21:28 +01:00
spi-nxp-fspi.c
spi: spi-nxp-fspi: Fix a NULL vs IS_ERR() check in probe
2020-03-12 15:09:58 +00:00
spi-oc-tiny.c
SPI SUBSYSTEM: Replace HTTP links with HTTPS ones
2020-07-09 22:41:11 +01:00
spi-omap2-mcspi.c
spi: omap2-mcspi: Convert to use GPIO descriptors
2020-06-29 19:14:07 +01:00
spi-omap-100k.c
spi: omap-100k: Drop include
2020-07-14 17:38:46 +01:00
spi-omap-uwire.c
spi: omap-uwire: Use clk_prepare_enable and clk_disable_unprepare
2020-07-15 15:58:33 +01:00
spi-orion.c
spi: Fix SPI NOR and SPI NAND acronyms
2020-07-17 00:55:25 +01:00
spi-pic32-sqi.c
spi: pic32-sqi: use devm_platform_ioremap_resource() to simplify code
2019-09-04 17:20:52 +01:00
spi-pic32.c
spi: pic32: Retire dma_request_slave_channel_compat()
2019-11-22 19:53:41 +00:00
spi-pl022.c
spi: spi-pl022: Provide missing struct attribute/function param docs
2020-07-17 16:38:50 +01:00
spi-ppc4xx.c
spi: ppc4xx: Convert to use GPIO descriptors
2020-07-22 01:55:52 +01:00
spi-pxa2xx-dma.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
spi-pxa2xx-pci.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
spi-pxa2xx.c
spi: spi-pxa2xx: Do not define 'struct acpi_device_id' when !CONFIG_ACPI
2020-07-17 16:38:55 +01:00
spi-pxa2xx.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
spi-qcom-qspi.c
spi: spi-qcom-qspi: replace spin_lock_irqsave by spin_lock in hard IRQ
2020-09-14 15:50:10 +01:00
spi-qup.c
spi: qup: remove redundant assignment to variable ret
2020-09-14 15:50:04 +01:00
spi-rb4xx.c
spi: rb4xx: update driver to be device tree aware
2020-05-22 14:13:17 +01:00
spi-rockchip.c
spi: rockchip: Fix error in SPI slave pio read
2020-07-28 17:29:31 +01:00
spi-rpc-if.c
spi: add Renesas RPC-IF driver
2020-06-16 00:38:38 +01:00
spi-rspi.c
spi: rspi: Fill in controller speed limits
2020-08-20 22:38:17 +01:00
spi-s3c24xx-fiq.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
spi-s3c24xx-fiq.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
spi-s3c24xx.c
spi: s3c24xx: correct kerneldoc comment
2020-08-18 17:52:39 +01:00
spi-s3c64xx.c
spi: spi-s3c64xx: Add missing entries for structs 's3c64xx_spi_dma_data' and 's3c64xx_spi_dma_data'
2020-07-17 16:38:49 +01:00
spi-sc18is602.c
spi: sc18is602: Fix a typo in MODULE_DESCRIPTION
2020-04-14 12:39:37 +01:00
spi-sh-hspi.c
spi: use new spi_transfer_delay_exec helper where straightforward
2019-10-15 11:51:57 +01:00
spi-sh-msiof.c
spi: spi-sh-msiof: Fix checkpatch error Complex macros should use ()
2020-04-14 18:36:34 +01:00
spi-sh-sci.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
spi-sh.c
spi: Remove dev_err() usage after platform_get_irq()
2019-08-02 12:15:43 +01:00
spi-sifive.c
spi: sifive: disable clk when probe fails and remove
2019-11-04 13:26:11 +00:00
spi-sirf.c
spi: sirf: Use dma_request_chan() instead dma_request_slave_channel()
2019-12-16 11:57:36 +00:00
spi-slave-mt27xx.c
spi: mediatek: Use devm_platform_ioremap_resource() in mtk_spi_slave_probe()
2019-10-01 12:34:58 +01:00
spi-slave-system-control.c
…
spi-slave-time.c
…
spi-sprd-adi.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
spi-sprd.c
spi: sprd: Release DMA channel also on probe deferral
2020-09-08 18:19:23 +01:00
spi-st-ssc4.c
spi: st-ssc4: add missed pm_runtime_disable
2019-11-18 12:59:11 +00:00
spi-stm32-qspi.c
spi: stm32-qspi: Fix error path in case of -EPROBE_DEFER
2020-06-17 13:26:41 +01:00
spi-stm32.c
spi: stm32: Simplify with dev_err_probe()
2020-09-08 18:19:29 +01:00
spi-sun4i.c
spi: sun4i: update max transfer size reported
2020-07-27 14:55:21 +01:00
spi-sun6i.c
spi: spi-sun6i: sun6i_spi_transfer_one(): enable RF_RDY interrupt only if needed
2020-07-07 10:41:41 +01:00
spi-synquacer.c
spi: synquacer: Simplify with dev_err_probe()
2020-09-08 18:19:29 +01:00
spi-tegra20-sflash.c
spi: tegra20-sflash: Fix runtime PM imbalance on error
2020-05-28 14:01:16 +01:00
spi-tegra20-slink.c
spi: tegra20: Simplify with dev_err_probe()
2020-09-08 18:19:31 +01:00
spi-tegra114.c
spi: tegra114: Simplify with dev_err_probe()
2020-09-08 18:19:30 +01:00
spi-test.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
2019-05-30 11:26:37 -07:00
spi-ti-qspi.c
SPI SUBSYSTEM: Replace HTTP links with HTTPS ones
2020-07-09 22:41:11 +01:00
spi-tle62x0.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
spi-topcliff-pch.c
spi: spi-topcliff-pch: drop call to wakeup-disable
2020-07-28 17:29:29 +01:00
spi-txx9.c
spi: txx9: Convert to use GPIO descriptors
2019-10-30 14:14:32 +00:00
spi-uniphier.c
spi: uniphier: Use devm_platform_get_and_ioremap_resource() to simplify code
2020-05-11 18:17:52 +01:00
spi-xcomm.c
spi: use new spi_transfer_delay_exec helper where straightforward
2019-10-15 11:51:57 +01:00
spi-xilinx.c
spi: xilinx: Add DT support for selecting transfer word width
2019-10-24 12:45:21 +01:00
spi-xlp.c
spi: xlp: use devm_platform_ioremap_resource() to simplify code
2019-09-04 17:23:28 +01:00
spi-xtensa-xtfpga.c
spi: xtensa-xtfpga: Use devm_platform_ioremap_resource() in xtfpga_spi_probe()
2019-10-01 12:35:18 +01:00
spi-zynq-qspi.c
spi: spi-zynq-qspi: Add description for 2 missing attributes/parameters
2020-07-17 16:38:51 +01:00
spi-zynqmp-gqspi.c
spi: spi-zynqmp-gqspi: Correct a couple of misspellings in kerneldoc
2020-07-17 16:38:52 +01:00
spi.c
spi: Fixes for v5.9
2020-08-18 14:27:12 -07:00
spidev.c
spi: spidev: Remove redundant initialization of variable status
2020-09-09 16:27:46 +01:00