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linux/drivers/spi
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Vladimir Oltean b4e46c9954
spi: sc18is602: implement .max_{transfer,message}_size() for the controller 
Allow SPI peripherals attached to this controller to know what is the
maximum transfer size and message size, so they can limit their transfer
lengths properly in case they are otherwise capable of larger transfer
sizes. For the sc18is602, this is 200 bytes in both cases, since as far
as I understand, it isn't possible to tell the controller to keep the
chip select asserted after the STOP command is sent.

The controller can support SPI messages larger than 200 bytes if
cs_change is set for individual transfers such that the portions with
chip select asserted are never longer than 200 bytes. What is not
supported is just SPI messages with a continuous chip select larger than
200. I don't think it is possible to express this using the current API,
so drivers which do send SPI messages with cs_change can safely just
look at the max_transfer_size limit.

An example of user for this is sja1105_xfer() in
drivers/net/dsa/sja1105/sja1105_spi.c which sends by default 64 * 4 =
256 byte transfers.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20210520131238.2903024-3-olteanv@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2021-05-21 13:13:33 +01:00
..
atmel-quadspi.c spi: atmel-quadspi: Disable the QSPI IP at suspend() 2021-02-11 13:15:12 +00:00
internals.h
Kconfig spi: altera: Make SPI_ALTERA_CORE invisible 2021-04-28 16:34:59 +01:00
Makefile spi: altera: Add DFL bus driver for Altera API Controller 2021-04-20 17:26:41 +01:00
spi-altera-core.c spi: altera: separate core code from platform code 2021-04-20 17:26:40 +01:00
spi-altera-dfl.c spi: altera: Add DFL bus driver for Altera API Controller 2021-04-20 17:26:41 +01:00
spi-altera-platform.c spi: altera: separate core code from platform code 2021-04-20 17:26:40 +01:00
spi-amd.c spi: amd: Use devm_platform_ioremap_resource() in amd_spi_probe 2020-11-23 20:42:05 +00:00
spi-ar934x.c spi: ar934x: Don't leak SPI master in probe error path 2020-12-07 14:18:59 +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: remove spi-master setup and cleanup assignment 2021-03-10 12:25:15 +00:00
spi-atmel.c spi: atmel: Drop unused variable 2021-03-10 12:46:53 +00:00
spi-au1550.c spi: spi-au1550: Fix various whitespace warnings 2021-01-22 16:26:21 +00:00
spi-axi-spi-engine.c spi: spi-axi-spi-engine: remove usage of delay_usecs 2021-03-12 14:30:42 +00:00
spi-bcm63xx-hsspi.c spi: bcm63xx-hsspi: fix pm_runtime 2021-03-10 12:25:12 +00:00
spi-bcm63xx.c spi: bcm63xx-spi: don't check 'delay_usecs' field 2021-03-12 14:30:43 +00:00
spi-bcm2835.c spi: bcm2835: Call the dedicated transfer completion function. 2021-01-14 14:27:39 +00:00
spi-bcm2835aux.c spi: bcm2835aux: Call the dedicated transfer completion function. 2021-01-14 14:27:40 +00:00
spi-bcm-qspi.c spi: spi-bcm-qspi: replace 'delay_usecs' with 'delay.value' check 2021-03-12 14:30:44 +00:00
spi-bcm-qspi.h
spi-bitbang-txrx.h
spi-bitbang.c spi: spi-bitbang: Fix open brace following function definitions go on the next line 2021-03-24 19:51:08 +00:00
spi-brcmstb-qspi.c
spi-butterfly.c spi: butterfly: Switch to use module_parport_driver() 2021-03-10 12:46:05 +00:00
spi-cadence-quadspi.c spi: Updates for v5.13 2021-04-26 16:32:11 -07:00
spi-cadence.c spi: cadence: cache reference clock rate during probe 2021-01-15 14:14:38 +00:00
spi-cavium-octeon.c
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-cavium.h
spi-clps711x.c spi: clps711xx: remove redundant white-space 2021-02-04 18:45:59 +00:00
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 spi: davinci: Use device_get_match_data() helper 2021-04-09 13:44:04 +01:00
spi-dln2.c spi: dln2: Fix reference leak to master 2021-04-09 13:43:57 +01:00
spi-dw-bt1.c spi: dw: Avoid stack content exposure 2021-02-12 12:41:49 +00:00
spi-dw-core.c spi: dw: Add support for 32-bits max xfer size 2020-12-09 12:14:22 +00:00
spi-dw-dma.c spi: dw: Add generic DW SSI status-check method 2020-10-08 23:00:18 +01:00
spi-dw-mmio.c spi: dw: Add support for the Canaan K210 SoC SPI 2020-12-09 12:14:23 +00:00
spi-dw-pci.c spi: dw: Add DWC SSI capability 2020-10-08 23:00:06 +01:00
spi-dw.h spi: dw: Add support for 32-bits max xfer size 2020-12-09 12:14:22 +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: remove check for 'delay_usecs' 2021-03-12 14:30:48 +00:00
spi-fsi.c spi: fsi: add a missing of_node_put 2021-04-21 16:07:04 +01:00
spi-fsl-cpm.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
spi-fsl-cpm.h
spi-fsl-dspi.c spi: spi-fsl-dspi: Fix a resource leak in an error handling path 2021-05-10 13:00:27 +01:00
spi-fsl-espi.c spi: fsl-espi: remove usage of 'delay_usecs' field 2021-03-12 14:30:49 +00:00
spi-fsl-lib.c
spi-fsl-lib.h
spi-fsl-lpspi.c spi: fsl-lpspi: Fix PM reference leak in lpspi_prepare_xfer_hardware() 2021-04-09 13:43:59 +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 iounmap() on error in of_fsl_spi_probe() 2021-04-08 15:21:58 +01:00
spi-fsl-spi.h
spi-geni-qcom.c spi: spi-geni-qcom: Convert to use resource-managed OPP API 2021-03-16 10:14:11 +05:30
spi-gpio.c spi: gpio: Don't leak SPI master in probe error path 2020-12-07 14:18:54 +00:00
spi-hisi-kunpeng.c spi: hisi-kunpeng: Fix Woverflow warning on conversion 2021-04-07 16:58:34 +01:00
spi-hisi-sfc-v3xx.c spi: hisi-sfc-v3xx: drop unnecessary ACPI_PTR and related ifendif protection 2021-04-12 17:07:38 +01:00
spi-img-spfi.c spi: img-spfi: fix reference leak in img_spfi_resume 2020-11-02 15:53:25 +00:00
spi-imx.c sound updates for 5.13 2021-04-30 12:48:14 -07:00
spi-iproc-qspi.c
spi-jcore.c spi: jcore: Fix trailing statements should be on next line 2021-03-24 19:51:09 +00:00
spi-lantiq-ssc.c spi: lantiq: remove redundant irqsave and irqrestore in hardIRQ 2020-09-17 19:56:02 +01:00
spi-lm70llp.c spi: lm70llp: Switch to use module_parport_driver() 2021-03-10 12:46:06 +00:00
spi-loopback-test.c treewide: Change list_sort to use const pointers 2021-04-08 16:04:22 -07:00
spi-lp8841-rtc.c
spi-mem.c spi: spi-mem: Fix code indent should use tabs where possible 2021-03-24 19:51:10 +00:00
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-mpc52xx.c powerpc updates for 5.12 2021-02-22 14:34:00 -08:00
spi-mpc512x-psc.c
spi-mt65xx.c spi: mediatek: add set_cs_timing support 2021-02-08 11:41:23 +00:00
spi-mt7621.c spi: mt7621: Don't leak SPI master in probe error path 2020-12-07 14:18:59 +00:00
spi-mtk-nor.c spi: spi-mtk-nor: Fix checkpatch spacing error 2021-03-24 19:51:07 +00:00
spi-mux.c spi: spi-mux: Simplify with dev_err_probe() 2020-09-08 18:19:27 +01:00
spi-mxic.c spi: mxic: Don't leak SPI master in probe error path 2020-12-07 14:18:52 +00:00
spi-mxs.c spi: mxs: fix reference leak in mxs_spi_probe 2020-11-18 18:00:26 +00:00
spi-npcm-fiu.c spi: npcm-fiu: Disable clock in probe error path 2020-12-07 14:19:00 +00:00
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: fspi: enable fspi driver for on imx8mp 2021-03-25 13:59:42 +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: Activate pinctrl idle state during runtime suspend 2021-03-10 12:46:51 +00:00
spi-omap-100k.c spi: omap-100k: Fix reference leak to master 2021-04-09 13:44:00 +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: orion: set devdata properly as it is being used later 2021-04-09 13:44:02 +01:00
spi-pic32-sqi.c
spi-pic32.c spi: pic32: Don't leak DMA channels in probe error path 2020-11-12 15:16:34 +00:00
spi-pl022.c spi: pl022: Convert to use GPIO descriptors 2021-03-31 13:54:29 +01:00
spi-ppc4xx.c spi: ppc4xx: Convert to use GPIO descriptors 2020-07-22 01:55:52 +01:00
spi-pxa2xx-dma.c
spi-pxa2xx-pci.c spi: pxa2xx: Fix checkpatch spacing errors 2021-03-24 19:51:05 +00:00
spi-pxa2xx.c Merge branch 'for-5.12' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-5.13 2021-04-15 19:29:40 +01:00
spi-pxa2xx.h
spi-qcom-qspi.c spi: spi-qcom-qspi: Convert to use resource-managed OPP API 2021-03-16 10:14:11 +05:30
spi-qup.c spi: qup: fix PM reference leak in spi_qup_remove() 2021-04-09 13:44:03 +01:00
spi-rb4xx.c spi: rb4xx: Don't leak SPI master in probe error path 2020-12-07 14:18:55 +00:00
spi-realtek-rtl.c spi: realtek-rtl: Add support for Realtek RTL838x/RTL839x SPI controllers 2021-02-04 18:45:57 +00:00
spi-rockchip.c spi: rockchip: Fix code indent should use tabs where possible 2021-03-24 19:51:11 +00:00
spi-rpc-if.c spi: rpc-if: Gaurd .pm assignment with CONFIG_PM_SLEEP #ifdef check 2021-01-11 16:39:09 +00:00
spi-rspi.c spi: rspi: Fill in controller speed limits 2020-08-20 22:38:17 +01:00
spi-s3c24xx-regs.h ARM: s3c24xx: move regs-spi.h into spi driver 2020-08-19 21:40:14 +02:00
spi-s3c24xx.c ARM: SoC platform updates 2020-10-24 10:33:08 -07:00
spi-s3c64xx.c spi: s3c64xx: constify driver/match data 2021-04-15 16:07:58 +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: Fill in controller speed limits 2021-01-13 12:19:09 +00:00
spi-sh-sci.c
spi-sh.c spi: spi-sh: replace 'delay_usecs' with 'delay.value' in pr_debug 2021-03-12 14:30:45 +00:00
spi-sifive.c
spi-slave-mt27xx.c spi: mediatek: add mt8195 spi slave support 2021-03-23 17:19:45 +00:00
spi-slave-system-control.c
spi-slave-time.c
spi-sprd-adi.c spi: sprd: Fix checkpatch spacing error 2021-03-24 19:51:04 +00:00
spi-sprd.c spi: sprd: Add missing MODULE_DEVICE_TABLE 2021-05-12 13:01:43 +01:00
spi-st-ssc4.c spi: st-ssc4: Fix unbalanced pm_runtime_disable() in probe error path 2020-11-12 15:16:35 +00:00
spi-stm32-qspi.c spi: stm32-qspi: fix debug format string 2021-04-22 16:30:40 +01:00
spi-stm32.c Merge branch 'for-5.12' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-5.13 2021-04-15 19:29:40 +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: enable autosuspend feature 2020-10-26 23:29:05 +00:00
spi-synquacer.c spi: spi-synquacer: fix set_cs handling 2021-02-03 16:23:07 +00:00
spi-tegra20-sflash.c spi: spi-tegra20-flash: don't check 'delay_usecs' field for spi transfer 2021-03-12 14:30:46 +00:00
spi-tegra20-slink.c spi: tegra20-slink: fix reference leak in slink ops of tegra20 2020-11-09 19:44:27 +00:00
spi-tegra114.c spi: tegra114: fix reference leak in tegra spi ops 2020-11-09 19:44:29 +00:00
spi-tegra210-quad.c spi: tegra210-quad: Add support for hardware dummy cycles transfer 2021-01-06 13:09:32 +00:00
spi-test.h
spi-ti-qspi.c spi: spi-ti-qspi: Free DMA resources 2021-03-10 12:25:09 +00:00
spi-tle62x0.c
spi-topcliff-pch.c spi: spi-topcliff-pch: Fix checkpatch spacing error 2021-03-24 19:51:03 +00:00
spi-uniphier.c
spi-xcomm.c
spi-xilinx.c spi: xilinx: Fix info message during probe 2020-09-17 19:56:01 +01:00
spi-xlp.c
spi-xtensa-xtfpga.c
spi-zynq-qspi.c spi: spi-zynq-qspi: Fix stack violation bug 2021-04-29 14:06:06 +01:00
spi-zynqmp-gqspi.c spi: spi-zynqmp-gqspi: return -ENOMEM if dma_map_single fails 2021-04-16 13:44:15 +01:00
spi.c spi: Don't have controller clean up spi device before driver unbind 2021-05-14 13:24:56 +01:00
spidev.c spidev: Add Micron SPI NOR Authenta device compatible 2021-04-20 17:29:41 +01:00