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fc96ec826b
linux/drivers/spi
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Christophe Leroy fc96ec826b
spi: fsl-cpm: Use 16 bit mode for large transfers with even size 
On CPM, the RISC core is a lot more efficiant when doing transfers
in 16-bits chunks than in 8-bits chunks, but unfortunately the
words need to be byte swapped as seen in a previous commit.

So, for large tranfers with an even size, allocate a temporary tx
buffer and byte-swap data before and after transfer.

This change allows setting higher speed for transfer. For instance
on an MPC 8xx (CPM1 comms RISC processor), the documentation tells
that transfer in byte mode at 1 kbit/s uses 0.200% of CPM load
at 25 MHz while a word transfer at the same speed uses 0.032%
of CPM load. This means the speed can be 6 times higher in
word mode for the same CPM load.

For the time being, only do it on CPM1 as there must be a
trade-off between the CPM load reduction and the CPU load required
to byte swap the data.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/f2e981f20f92dd28983c3949702a09248c23845c.1680371809.git.christophe.leroy@csgroup.eu
Signed-off-by: Mark Brown <broonie@kernel.org>
2023-04-05 12:33:34 +01:00
..
atmel-quadspi.c spi: atmel-quadspi: Convert to platform remove callback returning void 2023-03-17 15:47:51 +00:00
internals.h
Kconfig spi: nxp-flexspi: Add i.MX platform dependency 2023-03-13 14:09:16 +00:00
Makefile spi: Updates for v6.3 2023-02-22 10:53:37 -08:00
spi-altera-core.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-altera-dfl.c spi: spi-altera-dfl: switch to use modern name 2022-12-29 13:22:04 +00:00
spi-altera-platform.c spi: spi-altera-platform: switch to use modern name 2022-12-29 13:22:05 +00:00
spi-amd.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-ar934x.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-armada-3700.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-aspeed-smc.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-at91-usart.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-ath79.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-atmel.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-au1550.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-axi-spi-engine.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-bcm63xx-hsspi.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-bcm63xx.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-bcm2835.c spi: bcm2835: Convert to platform remove callback returning void 2023-03-31 12:54:07 +01:00
spi-bcm2835aux.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-bcm-qspi.c spi: bcm-qspi: Mark OF related data as maybe unused 2023-03-13 14:09:12 +00:00
spi-bcm-qspi.h spi: bcm-qspi: Make bcm_qspi_remove() return void 2022-10-18 19:16:53 +01:00
spi-bcmbca-hsspi.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-bitbang-txrx.h spi: bitbang: Fix lsb-first Rx 2022-08-15 01:26:20 +01:00
spi-bitbang.c
spi-brcmstb-qspi.c spi: brcmstb-qspi: Convert to platform remove callback returning void 2023-03-06 12:31:15 +00:00
spi-butterfly.c
spi-cadence-quadspi.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-cadence-xspi.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-cadence.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-cavium-octeon.c spi: cavium-octeon: Convert to platform remove callback returning void 2023-03-06 12:31:17 +00:00
spi-cavium-thunderx.c
spi-cavium.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-cavium.h
spi-clps711x.c spi: clps711x: Use syscon_regmap_lookup_by_phandle 2022-04-25 14:01:09 +01:00
spi-coldfire-qspi.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-davinci.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-dln2.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-dw-bt1.c spi: dw-bt1: Convert to platform remove callback returning void 2023-03-06 12:31:21 +00:00
spi-dw-core.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-dw-dma.c spi: dw-dma: decrease reference count in dw_spi_dma_init_mfld() 2022-11-16 13:43:03 +00:00
spi-dw-mmio.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-dw-pci.c spi: dw: Put the driver entities naming in order 2021-11-16 14:30:05 +00:00
spi-dw.h spi: dw: Add support for Intel Thunder Bay SPI controller 2022-07-13 13:32:32 +01:00
spi-ep93xx.c spi: ep93xx: Convert to platform remove callback returning void 2023-03-06 12:31:23 +00:00
spi-falcon.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-fsi.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-fsl-cpm.c spi: fsl-cpm: Use 16 bit mode for large transfers with even size 2023-04-05 12:33:34 +01:00
spi-fsl-cpm.h
spi-fsl-dspi.c spi: fsl-dspi: Remove unneeded cast to same type 2023-03-13 14:09:03 +00:00
spi-fsl-espi.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-fsl-lib.c
spi-fsl-lib.h
spi-fsl-lpspi.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-fsl-qspi.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-fsl-spi.c spi: fsl-cpm: Use 16 bit mode for large transfers with even size 2023-04-05 12:33:34 +01:00
spi-fsl-spi.h
spi-geni-qcom.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-gpio.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-gxp.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-hisi-kunpeng.c spi: hisi-kunpeng: Convert to platform remove callback returning void 2023-03-06 12:31:29 +00:00
spi-hisi-sfc-v3xx.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-img-spfi.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-imx.c spi: imx: Use devm_platform_get_and_ioremap_resource() 2023-04-04 12:46:54 +01:00
spi-ingenic.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-intel-pci.c spi: intel-pci: Add support for Meteor Lake-S SPI serial flash 2023-03-31 12:54:07 +01:00
spi-intel-platform.c mtd: spi-nor: intel-spi: Convert to SPI MEM 2022-02-14 12:53:09 +00:00
spi-intel.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-intel.h mtd: spi-nor: intel-spi: Convert to SPI MEM 2022-02-14 12:53:09 +00:00
spi-iproc-qspi.c spi: iproc-qspi: Convert to platform remove callback returning void 2023-03-06 12:31:31 +00:00
spi-jcore.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-lantiq-ssc.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-lm70llp.c
spi-loopback-test.c spi: spi-loopback-test: Allow skipping delays 2023-01-03 15:25:02 +00:00
spi-lp8841-rtc.c
spi-mem.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-meson-spicc.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-meson-spifc.c spi: meson-spifc: Convert to platform remove callback returning void 2023-03-06 12:31:33 +00:00
spi-microchip-core-qspi.c spi: microchip-core-qspi: Convert to platform remove callback returning void 2023-03-06 12:31:34 +00:00
spi-microchip-core.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-mpc52xx-psc.c spi: mpc5xxx-psc: Consistently use device property APIs 2023-03-07 13:58:34 +00:00
spi-mpc52xx.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-mpc512x-psc.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-mt65xx.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-mt7621.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-mtk-nor.c spi: mtk-nor: Convert to platform remove callback returning void 2023-03-06 21:17:45 +00:00
spi-mtk-snfi.c spi: mtk-snfi: Convert to platform remove callback returning void 2023-03-06 21:17:46 +00:00
spi-mux.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-mxic.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-mxs.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-npcm-fiu.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-npcm-pspi.c spi: npcm-pspi: Convert to platform remove callback returning void 2023-03-06 21:17:50 +00:00
spi-nxp-fspi.c spi: spi-nxp-fspi: use DLL calibration when clock rate > 100MHz 2023-03-22 13:17:43 +00:00
spi-oc-tiny.c spi: oc-tiny: Convert to platform remove callback returning void 2023-03-06 21:17:51 +00:00
spi-omap2-mcspi.c spi: omap2-mcspi: Use devm_platform_get_and_ioremap_resource() 2023-03-27 12:42:32 +01:00
spi-omap-uwire.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-orion.c spi: orion: Use devm_platform_get_and_ioremap_resource() 2023-03-27 12:42:33 +01:00
spi-pci1xxxx.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-pic32-sqi.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-pic32.c spi: pic32: Use devm_platform_get_and_ioremap_resource() 2023-03-27 12:42:34 +01:00
spi-pl022.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-ppc4xx.c spi: ppc4xx: Convert to platform remove callback returning void 2023-03-06 21:17:57 +00:00
spi-pxa2xx-dma.c
spi-pxa2xx-pci.c spi: pxa2xx-pci: Constify struct pxa_spi_info variables 2022-02-28 12:10:27 +00:00
spi-pxa2xx.c spi: pxa2xx: Mark OF related data as maybe unused 2023-03-13 14:09:11 +00:00
spi-pxa2xx.h spi: pxa2xx: Get rid of unused ->cs_control() 2021-11-29 12:19:59 +00:00
spi-qcom-qspi.c spi: spi-qcom-qspi: Support pinctrl sleep states 2023-03-28 01:26:10 +01:00
spi-qup.c spi: qup: Convert to platform remove callback returning void 2023-04-04 12:47:11 +01:00
spi-rb4xx.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-realtek-rtl.c
spi-rockchip-sfc.c spi: rockchip-sfc: Use devm_platform_ioremap_resource() 2023-03-29 17:48:57 +01:00
spi-rockchip.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-rpc-if.c spi: rpc-if: Convert to platform remove callback returning void 2023-03-06 21:18:02 +00:00
spi-rspi.c spi: rspi: Mark OF related data as maybe unused 2023-03-13 14:09:15 +00:00
spi-s3c64xx.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-sc18is602.c spi: sc18is602: Mark OF related data as maybe unused 2023-03-13 14:09:14 +00:00
spi-sh-hspi.c spi: sh-hspi: Convert to platform remove callback returning void 2023-03-06 21:18:06 +00:00
spi-sh-msiof.c spi: struct spi_device constification 2023-03-13 18:19:31 +00:00
spi-sh-sci.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-sh.c spi: sh: Convert to platform remove callback returning void 2023-03-06 21:18:08 +00:00
spi-sifive.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-slave-mt27xx.c spi: slave-mt27xx: Convert to platform remove callback returning void 2023-03-06 21:18:10 +00:00
spi-slave-system-control.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
spi-slave-time.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
spi-sn-f-ospi.c spi: f_ospi: Add missing spi_mem_default_supports_op() helper 2023-03-22 13:17:43 +00:00
spi-sprd-adi.c spi: sprd-adi: Use devm_platform_get_and_ioremap_resource() 2023-03-27 12:42:35 +01:00
spi-sprd.c spi: sprd: Use devm_platform_get_and_ioremap_resource() 2023-03-27 12:42:35 +01:00
spi-st-ssc4.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-stm32-qspi.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-stm32.c spi: stm32: Use devm_platform_get_and_ioremap_resource() 2023-04-04 12:46:55 +01:00
spi-sun4i.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-sun6i.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-sunplus-sp7021.c spi: sunplus-sp7021: Convert to platform remove callback returning void 2023-03-06 21:18:18 +00:00
spi-synquacer.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-tegra20-sflash.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-tegra20-slink.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-tegra114.c spi: tegra114: Use devm_platform_get_and_ioremap_resource() 2023-04-04 12:46:56 +01:00
spi-tegra210-quad.c spi: tegra210-quad: Use devm_platform_get_and_ioremap_resource() 2023-04-04 12:46:57 +01:00
spi-test.h
spi-ti-qspi.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-tle62x0.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
spi-topcliff-pch.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-uniphier.c spi: uniphier: Convert to platform remove callback returning void 2023-03-06 21:18:24 +00:00
spi-wpcm-fiu.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-xcomm.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-xilinx.c spi: xilinx: Use devm_platform_get_and_ioremap_resource() 2023-03-28 14:49:37 +01:00
spi-xlp.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-xtensa-xtfpga.c spi: xtensa-xtfpga: Convert to platform remove callback returning void 2023-03-06 21:18:26 +00:00
spi-zynq-qspi.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi-zynqmp-gqspi.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00
spi.c spi: core: add spi_split_transfers_maxwords 2023-03-16 13:10:55 +00:00
spidev.c spi: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:01 +00:00