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Douglas Anderson da48dc8c70 spi: spi-geni-qcom: Get rid of most overhead in prepare_message() 
There's a bunch of overhead in spi-geni-qcom's prepare_message.  Get
rid of it.  Before this change spi_geni_prepare_message() took around
14.5 us.  After this change, spi_geni_prepare_message() takes about
1.75 us (as measured by ftrace).

What's here:
* We're always in FIFO mode, so no need to call it for every transfer.
  This avoids a whole ton of readl/writel calls.
* We don't need to write a whole pile of config registers if the mode
  isn't changing.  Cache the last mode and only do the work if needed.
* For several registers we were trying to do read/modify/write, but
  there was no reason.  The registers only have one thing in them, so
  just write them.

Acked-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Akash Asthana <akashast@codeaurora.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20200701174506.3.I2b3d7aeb1ea622335482cce60c58d2f8381e61dd@changeid
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2020-07-13 16:30:52 -07:00
..
atmel-quadspi.c
spi: atmel-quadspi: Add verbose debug facilities to monitor register accesses
2020-03-20 13:03:38 +00:00
internals.h
spi: Add an helper to flush the message queue
2018-04-23 15:48:18 +01:00
Kconfig
spi: dw: Add DW SPI DMA/PCI/MMIO dependency on the DW SPI core
2020-05-29 15:55:51 +01:00
Makefile
spi: dw: Move Non-DMA code to the DW PCIe-SPI driver
2020-05-29 15:55:50 +01:00
spi-altera.c
spi: altera: use devm_platform_ioremap_resource() to simplify code
2019-09-04 17:14:50 +01:00
spi-amd.c
spi: amd: Drop superfluous member from struct amd_spi
2020-05-04 17:18:49 +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: make a3700_spi_init() return void
2020-05-06 15:55:13 +01:00
spi-at91-usart.c
spi: at91-usart: Use dma_request_chan() directly for channel request
2019-11-15 12:13:02 +00:00
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: Add missing annotation for atmel_spi_next_xfer_dma_submit()
2020-04-30 15:35:25 +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: Really keep pll clk enabled
2020-03-02 15:03:19 +00:00
spi-bcm63xx.c
spi: bcm63xx: extend error condition to delay as well
2019-10-15 11:47:06 +01:00
spi-bcm2835.c
spi: bcm2835: Remove shared interrupt support
2020-05-29 18:48:46 +01:00
spi-bcm2835aux.c
spi: bcm2835aux: Fix controller unregister order
2020-05-20 15:16:12 +01:00
spi-bcm-qspi.c
Merge branch 'for-5.7' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-5.8
2020-05-05 11:48:25 +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
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
spi-bitbang.c
spi: bitbang: Make chipselect callback optional
2019-12-09 18:46:34 +00:00
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.c
spi: cadence: Correct handling of native chipselect
2019-11-27 12:54:45 +00:00
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: Add missing pci_release_regions()
2019-12-09 18:44:19 +00:00
spi-cavium.c
spi: use new spi_transfer_delay_exec helper where straightforward
2019-10-15 11:51:57 +01:00
spi-cavium.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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 devm_platform_ioremap_resource() to simplify code
2019-09-04 17:17:56 +01:00
spi-davinci.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
2019-05-30 11:26:37 -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
Merge remote-tracking branch 'spi/for-5.8' into spi-next
2020-05-30 00:03:53 +01:00
spi-dw-dma.c
spi: dw: Refactor mid_spi_dma_setup() to separate DMA and IRQ config
2020-05-29 20:04:04 +01:00
spi-dw-mmio.c
Merge series "spi: dw: Add generic DW DMA controller support" from Serge Semin <Sergey.Semin@baikalelectronics.ru>:
2020-05-29 17:49:56 +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: Use regset32 DebugFS method to create regdump file
2020-05-29 15:55:54 +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 wrong SPI mode selection
2020-04-03 14:55:55 +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
spi: fsl-cpm: Correct the free:ing
2019-11-15 12:12:15 +00:00
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: fix native data copy
2020-05-29 23:43:15 +01:00
spi-fsl-espi.c
spi: use new spi_transfer_delay_exec helper where straightforward
2019-10-15 11:51:57 +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: spi-fsl-lpspi: Fix runtime PM imbalance on error
2020-05-26 17:44:55 +01:00
spi-fsl-qspi.c
spi: spi-fsl-qspi: Fix return value check of devm_ioremap() in probe
2020-04-22 14:07:46 +01:00
spi-fsl-spi.c
spi: spi-fsl-spi: Fix checkpatch error "foo * bar" should be "foo *bar"
2020-04-14 18:36:30 +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: Get rid of most overhead in prepare_message()
2020-07-13 16:30:52 -07:00
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: Use dma_request_chan() instead dma_request_slave_channel()
2019-12-16 11:57:06 +00:00
spi-imx.c
spi: imx: fallback to PIO if dma setup failure
2020-05-28 13:41:48 +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
spi: lantiq-ssc: Use devm_platform_ioremap_resource() in lantiq_ssc_probe()
2019-10-01 12:34:18 +01:00
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: use new delay field
2019-10-15 11:45:19 +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: Fix Dual/Quad modes on Octal-capable devices
2020-04-23 16:35:27 +01:00
spi-meson-spicc.c
spi: meson-spicc: add support for Amlogic G12A
2020-03-12 17:22:55 +00:00
spi-meson-spifc.c
spi: spi-meson-spifc: use devm_platform_ioremap_resource() to simplify code
2019-09-04 17:19:14 +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_CS_HIGH support
2019-11-18 17:47:00 +00:00
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: make mtk_nor_exec_op() statuc
2020-04-14 18:36:33 +01:00
spi-mux.c
spi: mux: repair mux usage
2020-05-25 13:25:34 +01:00
spi-mxic.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-mxs.c
spi: mxs: Drop GPIO includes
2020-03-17 13:20:16 +00:00
spi-npcm-fiu.c
remove ioremap_nocache and devm_ioremap_nocache
2020-01-06 09:45:59 +01:00
spi-npcm-pspi.c
Merge branch 'spi-5.6' into spi-next
2020-01-23 12:37:18 +00:00
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: oc-tiny: Use GPIO descriptors
2019-12-27 01:08:11 +00:00
spi-omap2-mcspi.c
spi: spi-omap2-mcspi: Support probe deferral for DMA channels
2020-02-06 15:53:57 +00:00
spi-omap-100k.c
spi: use new spi_transfer_delay_exec helper where straightforward
2019-10-15 11:51:57 +01:00
spi-omap-uwire.c
spi: omap-uwire: Remove needless bits_per_word and speed_hz tests
2015-09-17 12:33:58 +01:00
spi-orion.c
spi: orion: Convert to use GPIO descriptors
2020-04-21 19:48:05 +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: pl022: Use dma_request_chan() directly for channel request
2019-11-15 12:14:19 +00:00
spi-ppc4xx.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
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
Merge remote-tracking branch 'spi/for-5.8' into spi-next
2020-05-30 00:03:53 +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: Set an autosuspend delay of 250 ms
2020-07-13 16:17:15 -07:00
spi-qup.c
spi: qup: call spi_qup_pm_resume_runtime before suspending
2020-02-21 13:48:08 +00:00
spi-rb4xx.c
spi: rb4xx: update driver to be device tree aware
2020-05-22 14:13:17 +01:00
spi-rockchip.c
spi: spi-rockchip: use num-cs property and ctlr->enable_gpiods
2020-05-15 18:50:06 +01:00
spi-rspi.c
spi: rspi: Add support for active-high chip selects
2020-03-10 14:30:56 +00:00
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: spi-s3c24xx: Replace zero-length array with flexible-array member
2020-03-23 18:37:06 +00:00
spi-s3c64xx.c
spi: s3c64xx: Use dma_request_chan() directly for channel request
2019-11-15 12:14:39 +00:00
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: Fix missing break in switch
2018-10-03 16:23:10 +01:00
spi-slave-time.c
spi: slave: Add SPI slave handler reporting uptime at previous message
2017-05-26 13:12:04 +01:00
spi-sprd-adi.c
spi: sprd: adi: Use IS_ENABLED() to validate configs
2020-04-14 18:36:32 +01:00
spi-sprd.c
spi: sprd: Fix the incorrect SPI register
2019-12-04 12:14:13 +00:00
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 unbalanced pm_runtime_enable issue
2020-04-29 18:52:16 +01:00
spi-stm32.c
spi: stm32: Add 'SPI_SIMPLEX_RX', 'SPI_3WIRE_RX' support for stm32f4
2020-05-25 15:56:16 +01:00
spi-sun4i.c
spi: sun4i: use devm_platform_ioremap_resource() to simplify code
2019-09-04 17:22:29 +01:00
spi-sun6i.c
spi: sun6i: Add support for GPIO chip select lines
2020-05-11 18:17:53 +01:00
spi-synquacer.c
spi: Remove dev_err() usage after platform_get_irq()
2019-08-02 12:15:43 +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-slink: Fix runtime PM imbalance on error
2020-05-28 14:01:15 +01:00
spi-tegra114.c
spi: tegra114: Fix runtime PM imbalance on error
2020-05-28 14:01:14 +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: spi-ti-qspi: fix warning
2020-01-17 15:37:44 +00:00
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/topcliff-pch: Remove unneeded semicolon
2019-12-09 18:45:53 +00:00
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: zynq-qspi: Support two chip selects
2019-11-08 17:45:09 +00:00
spi-zynqmp-gqspi.c
firmware: xilinx: Remove eemi ops for fpga related APIs
2020-04-28 15:45:09 +02:00
spi.c
Merge remote-tracking branch 'spi/for-5.7' into spi-linus
2020-05-30 00:03:51 +01:00
spidev.c
spi: spidev: Add support for Octal mode data transfers
2020-04-16 13:54:44 +01:00