Geert Uytterhoeven 7d93aecdb5 spi: Add generic support for unused native cs with cs-gpios ... Some SPI master controllers always drive a native chip select when performing a transfer. Hence when using both native and GPIO chip selects, at least one native chip select must be left unused, to be driven when performing transfers with slave devices using GPIO chip selects. Currently, to find an unused native chip select, SPI controller drivers need to parse and process cs-gpios theirselves. This is not only duplicated in each driver that needs it, but also duplicates part of the work done later at SPI controller registration time. Note that this cannot be done after spi_register_controller() returns, as at that time, slave devices may have been probed already. Hence add generic support to the SPI subsystem for finding an unused native chip select. Optionally, this unused native chip select, and all other in-use native chip selects, can be validated against the maximum number of native chip selects available on the controller hardware. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/20200102133822.29346-2-geert+renesas@glider.be Signed-off-by: Mark Brown <broonie@kernel.org>		2020-01-07 22:32:25 +00:00
..
atmel-quadspi.c	spi: Remove dev_err() usage after platform_get_irq()	2019-08-02 12:15:43 +01:00
internals.h
Kconfig	spi: Fix Kconfig indentation	2019-11-20 17:11:50 +00:00
Makefile	ARM: SoC driver updates for v5.4	2019-09-16 15:52:38 -07:00
spi-altera.c	spi: altera: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:14:50 +01:00
spi-armada-3700.c	spi: a3700: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:15:09 +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: Use dma_request_chan() instead dma_request_slave_channel()	2019-12-16 11:56:07 +00:00
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: extend support for the delay field	2019-10-15 11:47:26 +01:00
spi-bcm63xx-hsspi.c	spi: use new spi_transfer_delay_exec helper where straightforward	2019-10-15 11:51:57 +01:00
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: no dev_err() on clk_get() -EPROBE_DEFER	2019-12-17 12:37:34 +00:00
spi-bcm2835aux.c	spi: bcm2835aux: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:16:08 +01:00
spi-bcm-qspi.c	spi: bcm-qspi: Use platform_get_irq_byname_optional() to avoid error message	2020-01-07 22:32:04 +00:00
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
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
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-mid.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288	2019-06-05 17:36:37 +02:00
spi-dw-mmio.c	Merge branch 'spi-5.5' into spi-next	2019-11-22 19:56:35 +00:00
spi-dw-pci.c	spi: dw-pci: Fix Chip Select amount on Intel Elkhart Lake PSE SPI	2019-10-22 17:57:43 +01:00
spi-dw.c	Merge branch 'for-5.5' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-5.6	2019-12-25 18:18:54 +00:00
spi-dw.h	spi: dw: Drop GPIO header	2019-10-30 14:14:50 +00:00
spi-efm32.c	spi: Remove dev_err() usage after platform_get_irq()	2019-08-02 12:15:43 +01:00
spi-ep93xx.c	spi: Remove dev_err() usage after platform_get_irq()	2019-08-02 12:15:43 +01:00
spi-falcon.c	spi: spi-falcon: extend warning to delay as well	2019-10-15 11:46:57 +01:00
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: Use dma_request_chan() instead dma_request_slave_channel()	2019-12-16 11:57:46 +00:00
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: fsl-lpspi: use true,false for bool variable	2019-12-25 18:17:09 +00:00
spi-fsl-qspi.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-fsl-spi.c	spi: fsl: use platform_get_irq() instead of of_irq_to_resource()	2019-12-16 11:54:55 +00:00
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: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:18:25 +01:00
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-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: use true,false for bool variable	2019-12-25 18:17:25 +00:00
spi-iproc-qspi.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174	2019-05-30 11:26:41 -07:00
spi-jcore.c	treewide: Add SPDX license identifier for more missed files	2019-05-21 10:50:45 +02:00
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: fallback to using transfers when CS gpios are used	2019-11-07 13:11:18 +00:00
spi-meson-spicc.c	spi: meson-spicc: Use GPIO descriptors	2019-12-16 11:58:48 +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-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: Use dma_request_chan() instead dma_request_slave_channel()	2019-12-16 11:57:26 +00:00
spi-npcm-fiu.c	spi: npcm-fiu: remove set but not used variable 'retlen'	2019-09-05 18:19:45 +01:00
spi-npcm-pspi.c	spi: npcm: Remove set but not used variable 'val'	2019-10-09 18:20:16 +01:00
spi-nxp-fspi.c	spi: nxp-fspi: Ensure width is respected in spi-mem operations	2019-12-16 11:54:34 +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: omap2-mcspi: Remove redundant checks	2019-11-11 12:50:26 +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-orion.c	spi: orion: use new word_delay field for SPI transfers	2019-10-15 11:43:31 +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 branch 'for-5.5' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-5.6	2019-12-25 18:18:54 +00:00
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: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:21:12 +01:00
spi-qup.c	spi: qup: Use dma_request_chan() directly for channel request	2019-11-15 12:14:29 +00:00
spi-rb4xx.c	spi: rb4xx: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:21:21 +01:00
spi-rockchip.c	Linux 5.2-rc4	2019-06-10 18:52:53 +01:00
spi-rspi.c	spi: rspi: Remove obsolete platform_device_id entries	2019-12-11 16:50:06 +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: s3c24xx: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:21:31 +01:00
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: use new spi_transfer_delay_exec helper where straightforward	2019-10-15 11:51:57 +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: sh-msiof: Use devm_platform_ioremap_resource() helper	2019-08-07 14:24:47 +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-time.c
spi-sprd-adi.c	spi: sprd: adi: Set BIT_WDG_NEW bit when rebooting	2019-10-28 13:17:10 +00:00
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: Use dma_request_chan() instead dma_request_slave_channel()	2019-12-16 11:58:08 +00:00
spi-stm32.c	spi: stm32: Use dma_request_chan() instead dma_request_slave_channel()	2019-12-16 11:58:28 +00:00
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: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:22:49 +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: use to new spi_transfer_delay_exec	2019-10-15 11:45:07 +01:00
spi-tegra20-slink.c	spi: tegra20-slink: add missed clk_unprepare	2019-11-15 12:15:22 +00:00
spi-tegra114.c	spi: tegra114: use true,false for bool variable	2019-12-25 18:17:42 +00:00
spi-test.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
spi-ti-qspi.c	Merge branch 'for-5.5' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-5.6	2019-12-25 18:18:54 +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: Add DMA transfer mode support	2019-12-25 18:21:05 +00:00
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	spi: zynqmp: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:23:48 +01:00
spi.c	spi: Add generic support for unused native cs with cs-gpios	2020-01-07 22:32:25 +00:00
spidev.c	spi: spidev: use new delay field for spi transfers	2019-10-15 11:45:29 +01:00