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linux/drivers/spi
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Christophe Leroy 5e0531f6b9
spi: Add capability to perform some transfer with chipselect off 
Some components require a few clock cycles with chipselect off before
or/and after the data transfer done with CS on.

Typically IDT 801034 QUAD PCM CODEC datasheet states "Note *: CCLK
should have one cycle before CS goes low, and two cycles after
CS goes high".

The cycles "before" are implicitely provided by all previous activity
on the SPI bus. But the cycles "after" must be provided in order to
terminate the SPI transfer.

In order to use that kind of component, add a cs_off flag to
spi_transfer struct. When this flag is set, the transfer is performed
with chipselect off. This allows consummer to add a dummy transfer
at the end of the transfer list which is performed with chipselect
OFF, providing the required additional clock cycles.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/434165c46f06d802690208a11e7ea2500e8da4c7.1662558898.git.christophe.leroy@csgroup.eu
Signed-off-by: Mark Brown <broonie@kernel.org>
2022-09-07 15:18:48 +01:00
..
atmel-quadspi.c
spi: atmel-quadspi: align condition to parenthesis
2022-06-09 12:20:05 +01:00
internals.h
…
Kconfig
spi: microchip-core-qspi: Add support for microchip fpga qspi controllers
2022-08-15 12:17:38 +01:00
Makefile
spi: microchip-core-qspi: Add support for microchip fpga qspi controllers
2022-08-15 12:17:38 +01:00
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: altera: Change to dynamic allocation of spi id
2021-10-20 01:53:15 +01:00
spi-amd.c
spi: amd: Fix speed selection
2022-08-30 11:21:34 +01:00
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
spi: aspeed: Fix division by zero
2022-06-29 18:10:12 +01:00
spi-at91-usart.c
spi: at91-usart: replacing legacy gpio interface for gpiod
2021-10-20 00:23:21 +01:00
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-bcm63xx-hsspi.c
…
spi-bcm63xx.c
…
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-bcm-qspi.c
spi: bcm-qspi: fix MSPI only access with bcm_qspi_exec_mem_op()
2022-04-06 15:50:11 +01:00
spi-bcm-qspi.h
…
spi-bitbang-txrx.h
spi: gpio: Implement LSB First bitbang support
2022-02-22 11:56:41 +00:00
spi-bitbang.c
spi: Cleanup on failure of initial setup
2021-06-01 14:03:12 +01:00
spi-brcmstb-qspi.c
…
spi-butterfly.c
…
spi-cadence-quadspi.c
spi: cadence-quadspi: Remove spi_master_put() in probe failure path
2022-07-14 13:26:35 +01:00
spi-cadence-xspi.c
spi: cadence: fix platform_get_irq.cocci warning
2022-03-07 13:16:07 +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: coldfire-qspi: Use clk_disable_unprepare in the remove function
2021-08-19 18:20:10 +01:00
spi-davinci.c
spi: davinci: invoke chipselect callback
2021-08-24 20:53:24 +01:00
spi-dln2.c
spi: dln2: Propagate firmware node
2021-12-23 13:38:38 +00:00
spi-dw-bt1.c
spi: dw: Put the driver entities naming in order
2021-11-16 14:30:05 +00:00
spi-dw-core.c
spi: dw: Quite logging on deferred controller registration
2022-08-23 13:06:36 +01:00
spi-dw-dma.c
spi: dw: Add deferred DMA-channels setup support
2022-06-27 13:24:33 +01:00
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: 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: spi-ep93xx: Prepare clock before using it
2021-08-03 18:27:24 +01:00
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.h
…
spi-fsl-dspi.c
spi: spi-fsl-dspi: Fix issue with uninitialized dma_slave_config
2021-08-10 13:22:19 +01:00
spi-fsl-espi.c
…
spi-fsl-lib.c
…
spi-fsl-lib.h
…
spi-fsl-lpspi.c
spi: lpspi: Simplify some error message
2022-08-15 12:18:42 +01:00
spi-fsl-qspi.c
spi: spi-fsl-qspi: check return value after calling platform_get_resource_byname()
2022-05-09 12:48:47 +01:00
spi-fsl-spi.c
spi: Cleanup on failure of initial setup
2021-06-01 14:03:12 +01:00
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: gpio: Implement LSB First bitbang support
2022-02-22 11:56:41 +00:00
spi-gxp.c
spi: spi-gxp: Add support for HPE GXP SoCs
2022-07-29 17:38:52 +01:00
spi-hisi-kunpeng.c
spi: hisi-kunpeng: Fix the debugfs directory name incorrect
2021-11-17 13:04:54 +00:00
spi-hisi-sfc-v3xx.c
…
spi-img-spfi.c
spi: img-spfi: Fix pm_runtime_get_sync() error checking
2022-04-22 12:37:36 +01:00
spi-imx.c
sound updates for 5.19-rc1
2022-05-25 16:55:16 -07:00
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: 64k erase is supported from Canon Lake and beyond
2022-08-22 14:07:30 +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-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: lm70llp: add parenthesis for sizeof
2021-05-20 18:00:34 +01:00
spi-loopback-test.c
…
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: meson-spicc: add local pow2 clock ops to preserve rate between messages
2022-08-11 18:41:44 +01:00
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: Simplify some error message
2022-08-15 12:18:41 +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
powerpc/mpc5xxx: Switch mpc5xxx_get_bus_frequency() to use fwnode
2022-06-22 12:51:49 +10:00
spi-mpc512x-psc.c
spi: mpc512x-psc: Fix compile errors
2022-02-02 16:09:29 +00:00
spi-mt65xx.c
spi: mt65xx: Fix definitions indentation
2022-04-19 16:32:14 +01:00
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: initialize spi controller after resume
2022-04-12 17:18:51 +01:00
spi-mtk-snfi.c
spi: mtk-snfi: preserve dma_mapping_error() error codes
2022-05-03 14:00:38 +01:00
spi-mux.c
spi-mux: Fix false-positive lockdep splats
2021-10-14 13:32:19 +01:00
spi-mxic.c
spi: mxic: Fix an error handling path in mxic_spi_probe()
2022-04-04 08:45:14 +01:00
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: Add NPCM8XX support
2022-07-20 16:55:26 +01:00
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: Do not dereference fwnode in struct device
2022-09-07 12:44:33 +01:00
spi-oc-tiny.c
…
spi-omap2-mcspi.c
spi: omap2-mcspi: add support for interword delay
2022-05-04 16:02:36 +01:00
spi-omap-100k.c
…
spi-omap-uwire.c
ARM: omap1: move perseus spi pinconf to board file
2022-04-21 15:01:08 +02:00
spi-orion.c
spi: orion: Add of_node_put() before goto
2021-10-15 16:10:59 +01:00
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: spl022: fix Microwire full duplex mode
2021-10-26 11:53:57 +01:00
spi-ppc4xx.c
spi: ppc4xx: add parenthesis for sizeof
2021-05-20 18:00:40 +01:00
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: Remove the unneeded result variable
2022-08-25 12:29:36 +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: add missing clk_disable_unprepare on error in spi_qup_pm_resume_runtime()
2022-09-05 13:09:51 +01:00
spi-rb4xx.c
…
spi-realtek-rtl.c
…
spi-rockchip-sfc.c
spi: rockchip-sfc: fix platform_get_irq.cocci warning
2022-03-10 12:17:56 +00:00
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: Convert to GPIO descriptors
2022-01-24 13:37:34 +00:00
spi-s3c64xx.c
spi: s3c64xx: correct dma_chan pointer initialization
2022-08-15 12:18:40 +01:00
spi-sc18is602.c
spi: sc18is602: implement .max_{transfer,message}_size() for the controller
2021-05-21 13:13:33 +01:00
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-sprd-adi.c
spi: sprd: Add ADI r3 support
2021-08-26 12:09:38 +01:00
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: using pm_runtime_resume_and_get instead of pm_runtime_get_sync
2022-04-25 14:01:08 +01:00
spi-sun4i.c
spi: sun4i: fix typos in comments
2022-03-15 12:03:58 +00:00
spi-sun6i.c
spi: spi-sun6i: Fix chipselect/clock bug
2021-06-23 11:48:36 +01:00
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: Add missing clk_disable_unprepare()
2022-06-27 23:26:53 +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: Multi-cs support
2022-06-13 13:28:29 +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-xcomm.c
…
spi-xilinx.c
…
spi-xlp.c
spi: xlp: Remove Netlogic XLP variants
2021-11-15 13:27:17 +00:00
spi-xtensa-xtfpga.c
…
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 two chip select support
2022-06-06 12:41:27 +01:00
spi.c
spi: Add capability to perform some transfer with chipselect off
2022-09-07 15:18:48 +01:00
spidev.c
spi: spidev: add SPI_RX_CPHA_FLIP
2022-04-19 13:13:48 +01:00