linux-stable/drivers/spi
Christophe Leroy b9d9e8856f spi: fsl-cpm: Use 16 bit mode for large transfers with even size
commit fc96ec826b upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-05-17 13:59:12 +02:00
..
Kconfig spi: dw_bt1: fix MUX_MMIO dependencies 2023-03-10 09:28:35 +01:00
Makefile spi: wpcm-fiu: Add driver for Nuvoton WPCM450 Flash Interface Unit (FIU) 2022-11-25 13:30:15 +00:00
atmel-quadspi.c spi: atmel-quadspi: Free resources even if runtime resume failed in .remove() 2023-05-11 23:11:20 +09:00
internals.h
spi-altera-core.c
spi-altera-dfl.c spi: spi-altera-dfl: Fix an error handling path 2022-06-06 12:39:16 +01:00
spi-altera-platform.c
spi-amd.c spi: amd: Fix SPI_SPD7 value 2022-11-04 12:25:03 +00:00
spi-ar934x.c spi: ar934x: fix transfer size 2022-01-04 14:59:40 +00:00
spi-armada-3700.c spi: a3700: support BE for AC5 SPI driver 2022-07-26 16:51:07 +01:00
spi-aspeed-smc.c Linux 6.1-rc4 2022-11-25 19:16:05 +00:00
spi-at91-usart.c
spi-ath79.c spi: ath79: add mem_ops for fast-read 2022-02-08 13:40:18 +00:00
spi-atmel.c spi: atmel: remove #ifdef CONFIG_{PM, SLEEP} 2022-07-18 13:45:32 +01:00
spi-au1550.c spi: spi-au1550: replace ternary operator with min() 2022-05-16 17:57:01 +01:00
spi-axi-spi-engine.c
spi-bcm-qspi.c spi: bcm-qspi: Make bcm_qspi_remove() return void 2022-10-18 19:16:53 +01:00
spi-bcm-qspi.h spi: bcm-qspi: Make bcm_qspi_remove() return void 2022-10-18 19:16:53 +01:00
spi-bcm63xx-hsspi.c spi: bcm63xx-hsspi: Fix multi-bit mode setting 2023-03-10 09:28:39 +01:00
spi-bcm63xx.c spi: bcm63xx: Use devm_platform_get_and_ioremap_resource() 2022-10-17 12:49:49 +01:00
spi-bcm2835.c spi: Updates for v5.20 2022-08-02 10:55:04 -07:00
spi-bcm2835aux.c spi: bcm2835aux: Convert to use GPIO descriptors 2022-02-01 16:08:47 +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: bcm-qspi: Make bcm_qspi_remove() return void 2022-10-18 19:16:53 +01:00
spi-butterfly.c
spi-cadence-quadspi.c spi: cadence-quadspi: use macro DEFINE_SIMPLE_DEV_PM_OPS 2023-05-11 23:11:24 +09:00
spi-cadence-xspi.c spi: cadence: Fix busy cycles calculation 2022-12-26 23:23:21 +00:00
spi-cadence.c spi: spi-cadence: Fix SPI NO Slave Select macro definition 2022-07-20 18:45:21 +01:00
spi-cavium-octeon.c
spi-cavium-thunderx.c
spi-cavium.c
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-davinci.c
spi-dln2.c spi: dln2: Propagate firmware node 2021-12-23 13:38:38 +00:00
spi-dw-bt1.c spi: dw: Fix PM disable depth imbalance in dw_spi_bt1_probe 2022-09-26 16:10:36 +01:00
spi-dw-core.c spi: dw: Fix wrong FIFO level setting for long xfers 2023-01-27 16:38:04 +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: dw: Add support for Intel Thunder Bay SPI controller 2022-07-13 13:32:32 +01:00
spi-dw-pci.c
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-falcon.c
spi-fsi.c spi: fsi: Increase timeout and ensure status is checked 2022-06-23 15:48:21 +01:00
spi-fsl-cpm.c spi: fsl-cpm: Use 16 bit mode for large transfers with even size 2023-05-17 13:59:12 +02:00
spi-fsl-cpm.h
spi-fsl-dspi.c spi: fsl-dspi: add cs-gpios support 2022-11-16 14:46:07 +00:00
spi-fsl-espi.c
spi-fsl-lib.c
spi-fsl-lib.h
spi-fsl-lpspi.c spi: spi-fsl-lpspi: support multiple cs for lpspi 2022-12-07 14:19:20 +00:00
spi-fsl-qspi.c spi: spi-fsl-qspi: Use devm_platform_ioremap_resource_byname() 2022-09-26 16:10:41 +01:00
spi-fsl-spi.c spi: fsl-cpm: Use 16 bit mode for large transfers with even size 2023-05-17 13:59:12 +02:00
spi-fsl-spi.h
spi-geni-qcom.c spi: qcom: geni: Simplify DMA setting 2022-01-28 16:00:24 +00:00
spi-gpio.c spi: spi-gpio: Don't set MOSI as an input if not 3WIRE mode 2022-12-08 11:46:41 +00:00
spi-gxp.c spi: spi-gxp: fix typo in SPDX identifier line 2022-10-04 12:45:07 +01:00
spi-hisi-kunpeng.c
spi-hisi-sfc-v3xx.c spi: hisi-sfc-v3xx: Fix a typo ("duall") 2022-11-03 19:34:33 +00:00
spi-img-spfi.c spi: img-spfi: Use devm_platform_get_and_ioremap_resource() 2022-10-19 15:57:01 +01:00
spi-imx.c spi: imx: Don't skip cleanup in remove's error path 2023-05-11 23:11:20 +09:00
spi-ingenic.c spi: ingenic: Add support for new Ingenic SoCs. 2022-04-25 14:00:51 +01:00
spi-intel-pci.c spi: intel: Add support for Intel Meteor Lake-P SPI serial flash 2022-06-29 12:38:20 +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: intel: Check number of chip selects after reading the descriptor 2023-03-10 09:29:45 +01:00
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: bcm-qspi: Make bcm_qspi_remove() return void 2022-10-18 19:16:53 +01:00
spi-jcore.c
spi-lantiq-ssc.c spi: Use of_device_get_match_data() 2022-02-21 13:25:19 +00:00
spi-lm70llp.c
spi-loopback-test.c spi: spi-loopback-test: Add test to trigger DMA/PIO mixing 2022-09-19 15:44:19 +01:00
spi-lp8841-rtc.c
spi-mem.c spi: spi-mem: Fix spi_mem_poll_status() 2022-06-06 12:32:27 +01:00
spi-meson-spicc.c spi: Updates for v6.2 2022-12-13 12:54:31 -08:00
spi-meson-spifc.c spi: spi-meson-spifc: Add missing pm_runtime_disable() in meson_spifc_probe 2022-01-07 13:36:38 +00:00
spi-microchip-core-qspi.c spi: microchip-core-qspi: Add support for microchip fpga qspi controllers 2022-08-15 12:17:38 +01:00
spi-microchip-core.c spi: microchip-core: Remove the unused function mchp_corespi_enable() 2022-10-17 12:49:47 +01:00
spi-mpc52xx-psc.c spi: mpc52xx-psc: Switch to using core message queue 2022-06-27 13:24:36 +01:00
spi-mpc52xx.c spi: mpc52xx: Replace NO_IRQ by 0 2022-10-10 13:01:20 +01:00
spi-mpc512x-psc.c spi: mpc512x-psc: Fix compile errors 2022-02-02 16:09:29 +00:00
spi-mt65xx.c spi: mediatek: Enable irq before the spi registration 2022-12-26 23:23:21 +00:00
spi-mt7621.c spi: mt7621: Remove 'clk' from 'struct mt7621_spi' 2022-08-29 17:51:39 +01:00
spi-mtk-nor.c spi: spi-mtk-nor: Add recovery mechanism for dma read timeout 2022-12-07 14:19:22 +00:00
spi-mtk-snfi.c spi: mtk-snfi: Add snfi support for MT7986 IC 2022-12-06 12:37:32 +00:00
spi-mux.c spi: mux: Fix mux interaction with fast path optimisations 2022-09-02 13:27:13 +01:00
spi-mxic.c spi: mxic: Use devm_platform_ioremap_resource_byname() 2022-10-31 13:20:25 +00:00
spi-mxs.c spi: mxs: using pm_runtime_resume_and_get instead of pm_runtime_get_sync 2022-04-25 14:00:59 +01:00
spi-npcm-fiu.c spi: npcm-fiu: Use devm_platform_ioremap_resource_byname() 2022-10-31 13:20:24 +00:00
spi-npcm-pspi.c spi: npcm-pspi: Add NPCM845 peripheral SPI support 2022-08-15 12:17:29 +01:00
spi-nxp-fspi.c spi: nxp-fspi: make const array ls1028a_soc_attr static 2022-11-02 16:44:15 +00:00
spi-oc-tiny.c
spi-omap-100k.c spi/omap100k:Fix PM disable depth imbalance in omap1_spi100k_probe 2022-09-26 16:10:37 +01:00
spi-omap-uwire.c ARM: omap1: move perseus spi pinconf to board file 2022-04-21 15:01:08 +02:00
spi-omap2-mcspi.c spi: omap2-mcspi: Fix probe so driver works again 2022-09-21 10:28:20 +01:00
spi-orion.c
spi-pci1xxxx.c spi: mchp-pci1xxxx: Fix SPI transactions not working after suspend and resume 2023-05-11 23:11:21 +09:00
spi-pic32-sqi.c
spi-pic32.c spi: pic32: Convert to use GPIO descriptors 2022-01-31 15:17:30 +00:00
spi-pl022.c
spi-ppc4xx.c
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: Move OF and ACPI ID tables closer to their user 2022-10-24 13:30:18 +01:00
spi-pxa2xx.h spi: pxa2xx: Get rid of unused ->cs_control() 2021-11-29 12:19:59 +00:00
spi-qcom-qspi.c
spi-qup.c spi: qup: Don't skip cleanup in remove's error path 2023-05-11 23:11:21 +09:00
spi-rb4xx.c
spi-realtek-rtl.c
spi-rockchip-sfc.c spi: spi-rockchip: Fix missing unwind goto in rockchip_sfc_probe() 2023-04-26 14:29:58 +02:00
spi-rockchip.c spi: rockchip: Unmask IRQ at the final to avoid preemption 2022-06-20 11:35:43 +01:00
spi-rpc-if.c spi: rpc-if: Fix RPM imbalance in probe error path 2022-04-04 08:38:59 +01:00
spi-rspi.c spi: spi-rspi: Fix PIO fallback on RZ platforms 2022-07-21 17:21:07 +01:00
spi-s3c24xx-regs.h
spi-s3c24xx.c spi: s3c24xx: Switch to use devm_spi_alloc_master() 2022-09-23 18:21:50 +01:00
spi-s3c64xx.c spi: s3c64xx: Fix large transfers with DMA 2022-09-28 12:54:07 +01:00
spi-sc18is602.c spi: sc18is602: Convert to i2c's .probe_new() 2022-11-23 17:26:25 +00:00
spi-sh-hspi.c
spi-sh-msiof.c spi: sh-msiof: add generic Gen4 binding 2022-08-29 12:41:36 +01:00
spi-sh-sci.c
spi-sh.c spi: sh: Switch to using core message queue 2022-06-27 13:24:35 +01:00
spi-sifive.c spi: sifive: add PM callbacks to support suspend/resume 2022-06-10 13:32:24 +01:00
spi-slave-mt27xx.c
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 2023-05-11 23:11:20 +09:00
spi-sprd-adi.c
spi-sprd.c spi: spi-sprd: using pm_runtime_resume_and_get instead of pm_runtime_get_sync 2022-04-25 14:00:57 +01:00
spi-st-ssc4.c spi: st-ssc4: Covert to use GPIO descriptors 2022-02-01 16:08:45 +00:00
spi-stm32-qspi.c spi: stm32-qspi: Refactor dual flash mode enable check in ->setup() 2022-08-31 12:13:11 +01:00
spi-stm32.c spi: stm32: fix stm32_spi_prepare_mbr() that halves spi clk for every run 2022-11-03 13:25:40 +00:00
spi-sun4i.c spi: sun4i: fix typos in comments 2022-03-15 12:03:58 +00:00
spi-sun6i.c
spi-sunplus-sp7021.c spi: remove spin_lock_irq and variable in the irq procress 2022-04-19 13:13:42 +01:00
spi-synquacer.c spi: synquacer: Fix timeout handling in synquacer_spi_transfer_one() 2023-03-10 09:28:40 +01:00
spi-tegra20-sflash.c spi: spi-tegra20-sflash: using pm_runtime_resume_and_get instead of pm_runtime_get_sync 2022-04-25 14:01:03 +01:00
spi-tegra20-slink.c spi: tegra20-slink: fix UAF in tegra_slink_remove() 2022-07-13 13:49:03 +01:00
spi-tegra114.c spi: spi-tegra114: using pm_runtime_resume_and_get instead of pm_runtime_get_sync 2022-04-19 13:13:44 +01:00
spi-tegra210-quad.c spi: tegra210-quad: Fix iterator outside loop 2023-03-11 13:50:34 +01:00
spi-test.h
spi-ti-qspi.c spi: spi-ti-qspi: Support per-transfer and per-slave speed_hz settings 2022-06-06 12:41:36 +01:00
spi-tle62x0.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
spi-topcliff-pch.c spi: topcliff-pch: Use core message validation 2022-06-20 12:43:36 +01:00
spi-uniphier.c spi: uniphier: fix reference count leak in uniphier_spi_probe() 2022-01-26 15:52:05 +00:00
spi-wpcm-fiu.c spi: wpcm-fiu: Add direct map support 2022-11-25 13:30:16 +00:00
spi-xcomm.c spi: xcomm: Convert to i2c's .probe_new() 2022-11-23 17:26:27 +00:00
spi-xilinx.c spi: xilinx: Switch to use devm_spi_alloc_master() 2022-09-23 18:21:49 +01:00
spi-xlp.c
spi-xtensa-xtfpga.c spi: xtensa-xtfpga: Switch to use devm_spi_alloc_master() 2022-09-22 14:39:50 +01:00
spi-zynq-qspi.c spi: spi-zynq-qspi: Fix a NULL pointer dereference in zynq_qspi_exec_mem_op() 2022-02-08 13:37:50 +00:00
spi-zynqmp-gqspi.c spi: spi-zynqmp-gqspi: Add tap delay support for GQSPI controller on Versal platform 2022-10-19 14:34:40 +01:00
spi.c spi: Use a 32-bit DT property for spi-cs-setup-delay-ns 2023-01-13 12:31:49 +00:00
spidev.c spi: spidev: fix a recursive locking error 2023-01-27 16:38:05 +00:00