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android_kernel_motorola_sm6225/drivers/spi
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Linus Walleij 74e8d28794 spi: gpio: No MISO does not imply no RX 
[ Upstream commit abf5feef3ff0cefade0c76be53b59e55fdd46093 ]

There is a logical problem in spi-gpio with host just
assigning a MOSI line and no MISO: this is interpreted
as the host cannot do RX and the host is flagged with
SPI_MASTER_NO_RX.

This is wrong: since GPIO lines can switch direction,
in 3WIRE operation the host will simply reverse the
direction of the GPIO line and start reading from it,
there is even code for doing this in the driver, but
it went unnoticed because it was tested by using a
master with 4 wires but a device using just 3 wires.

Remove the offending flag.

Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-13 11:08:28 -08:00
..
internals.h spi: Add an helper to flush the message queue 2018-04-23 15:48:18 +01:00
Kconfig spi: add SPI controller driver for UniPhier SoC 2018-08-01 11:22:37 +01:00
Makefile spi: add SPI controller driver for UniPhier SoC 2018-08-01 11:22:37 +01:00
spi-altera.c spi: altera: Consolidate TX/RX data register access 2017-08-16 11:53:31 +01:00
spi-armada-3700.c Merge remote-tracking branches 'spi/topic/a3700', 'spi/topic/atmel', 'spi/topic/bcm53xx', 'spi/topic/davinci' and 'spi/topic/dw' into spi-next 2018-01-26 17:57:24 +00:00
spi-ath79.c spi: add flags parameter to txrx_word function pointers 2018-08-01 14:50:24 +01:00
spi-atmel.c spi: spi-atmel: Use correct enum for DMA transfer direction 2018-03-28 10:42:48 +08:00
spi-au1550.c
spi-axi-spi-engine.c spi: spi-axi: fix potential use-after-free after deregistration 2017-10-31 11:15:10 +00:00
spi-bcm-qspi.c spi: bcm-qspi: fix calculation of address length 2018-11-13 11:08:15 -08:00
spi-bcm-qspi.h
spi-bcm63xx-hsspi.c spi/bcm63xx-hspi: Enable the clock before calling clk_get_rate(). 2018-04-26 12:41:22 +01:00
spi-bcm63xx.c spi/bcm63xx: fix error return code in bcm63xx_spi_probe() 2017-08-08 11:36:35 +01:00
spi-bcm2835.c
spi-bcm2835aux.c spi: bcm2835aux: ensure interrupts are enabled for shared handler 2018-05-04 08:09:02 +09:00
spi-bitbang-txrx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
spi-bitbang.c spi: spi-gpio: add SPI_3WIRE support 2018-08-01 14:50:28 +01:00
spi-brcmstb-qspi.c
spi-butterfly.c spi: add flags parameter to txrx_word function pointers 2018-08-01 14:50:24 +01:00
spi-cadence.c spi: cadence: Fix missing clk_disable_unprepare() on error in cnds_runtime_resume() 2018-07-11 15:34:53 +01:00
spi-cavium-octeon.c
spi-cavium-thunderx.c
spi-cavium.c
spi-cavium.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
spi-clps711x.c
spi-coldfire-qspi.c
spi-davinci.c Merge branch 'spi-4.18' into spi-linus 2018-08-10 17:51:50 +01:00
spi-dln2.c
spi-dw-mid.c spi: dw: Convert to generalized SPI controller API 2018-02-12 12:04:16 +00:00
spi-dw-mmio.c spi: dw-mmio: add MSCC Ocelot support 2018-07-30 12:02:08 +01:00
spi-dw-pci.c
spi-dw.c Merge branch 'spi-4.19' into spi-next 2018-08-10 17:51:52 +01:00
spi-dw.h spi: dw: export dw_spi_set_cs 2018-07-30 12:02:07 +01:00
spi-efm32.c
spi-ep93xx.c spi: spi-ep93xx: Use dma_data_direction for ep93xx_spi_dma_{finish,prepare} 2018-11-13 11:08:22 -08:00
spi-falcon.c spi: spi-falcon: drop check of boot select 2017-09-01 11:33:22 +01:00
spi-fsl-cpm.c
spi-fsl-cpm.h
spi-fsl-dspi.c spi: spi-fsl-dspi: fix broken DSPI_EOQ_MODE 2018-08-28 20:55:23 +01:00
spi-fsl-espi.c spi: spi-fsl-espi: Log fifo counters on error 2018-07-26 15:43:09 +01:00
spi-fsl-lib.c
spi-fsl-lib.h
spi-fsl-lpspi.c spi: lpspi: Switch to SPDX identifier 2018-05-03 10:28:08 +09:00
spi-fsl-spi.c Merge remote-tracking branches 'spi/topic/devprop', 'spi/topic/fsl', 'spi/topic/fsl-dspi', 'spi/topic/imx' and 'spi/topic/lantiq' into spi-next 2017-04-26 15:58:04 +01:00
spi-fsl-spi.h
spi-gpio.c spi: gpio: No MISO does not imply no RX 2018-11-13 11:08:28 -08:00
spi-img-spfi.c spi: img-spfi: Set device select bits for SPFI port state 2018-07-30 16:31:54 +01:00
spi-imx.c spi: imx: Use the longuest possible burst size when in dynamic_burst 2018-07-24 15:58:35 +01:00
spi-iproc-qspi.c
spi-jcore.c spi: jcore: disable ref_clk after getting its rate 2018-03-18 17:57:42 -07:00
spi-lantiq-ssc.c Merge remote-tracking branches 'spi/topic/devprop', 'spi/topic/fsl', 'spi/topic/fsl-dspi', 'spi/topic/imx' and 'spi/topic/lantiq' into spi-next 2017-04-26 15:58:04 +01:00
spi-lm70llp.c spi: add flags parameter to txrx_word function pointers 2018-08-01 14:50:24 +01:00
spi-loopback-test.c spi: loopback-test: implement testing with no CS 2017-07-26 13:08:56 +01:00
spi-lp8841-rtc.c
spi-mem.c spi: spi-mem: Adjust op len based on message/transfer size limitations 2018-11-13 11:08:15 -08:00
spi-meson-spicc.c spi: meson-spicc: Fix error handling in meson_spicc_probe() 2018-05-02 05:59:21 +09:00
spi-meson-spifc.c
spi-mpc52xx-psc.c
spi-mpc52xx.c spi: mpc52xx: Use gpio_is_valid() 2018-04-27 12:05:39 +01:00
spi-mpc512x-psc.c
spi-mt65xx.c spi: mediatek: add spi support for mt2712 IC 2017-06-20 13:39:14 +01:00
spi-mxs.c spi: mxs: Switch to SPDX identifier 2018-05-03 10:27:43 +09:00
spi-nuc900.c
spi-oc-tiny.c treewide: devm_kzalloc() -> devm_kcalloc() 2018-06-12 16:19:22 -07:00
spi-omap-100k.c
spi-omap-uwire.c
spi-omap2-mcspi.c spi: omap2-mcspi: remove several redundant variables 2018-07-30 16:08:12 +01:00
spi-orion.c spi: orion: fix CS GPIO handling again 2018-06-19 13:06:51 +01:00
spi-pic32-sqi.c
spi-pic32.c spi: pic32: fix spelling mistakes on macro names 2017-07-26 13:04:21 +01:00
spi-pl022.c treewide: devm_kzalloc() -> devm_kcalloc() 2018-06-12 16:19:22 -07:00
spi-ppc4xx.c
spi-pxa2xx-dma.c spi: pxa2xx: Use core message processing loop 2018-04-17 17:11:30 +01:00
spi-pxa2xx-pci.c
spi-pxa2xx.c spi: pxa2xx: Add support for Intel Ice Lake 2018-06-28 12:50:33 +01:00
spi-pxa2xx.h spi: pxa2xx: Allow 64-bit DMA 2018-04-24 16:10:12 +01:00
spi-qup.c spi: qup: fix 64-bit build warning 2017-08-10 15:50:23 +01:00
spi-rb4xx.c
spi-rockchip.c spi: rockchip: configure CTRLR1 according to size and data frame 2017-08-16 11:58:23 +01:00
spi-rspi.c spi: rspi: Fix interrupted DMA transfers 2018-09-05 12:40:12 +01:00
spi-s3c24xx-fiq.h
spi-s3c24xx-fiq.S
spi-s3c24xx.c
spi-s3c64xx.c spi: spi-s3c64xx: Fix system resume support 2018-05-17 13:27:08 +09:00
spi-sc18is602.c spi: sc18is602: Add OF device ID table 2017-02-22 10:50:09 -08:00
spi-sh-hspi.c
spi-sh-msiof.c spi: sh-msiof: Fix handling of write value for SISTR register 2018-09-05 12:39:57 +01:00
spi-sh-sci.c spi: add flags parameter to txrx_word function pointers 2018-08-01 14:50:24 +01:00
spi-sh.c spi: spi-sh: fix error return code in spi_sh_probe() 2017-08-09 17:18:06 +01:00
spi-sirf.c spi: sirf: account for const type of of_device_id.data 2018-01-03 11:38:46 +00:00
spi-slave-system-control.c spi: slave: Add SPI slave handler controlling system state 2017-05-26 13:12:19 +01:00
spi-slave-time.c spi: slave: Add SPI slave handler reporting uptime at previous message 2017-05-26 13:12:04 +01:00
spi-sprd-adi.c spi: sprd: Change to use devm_hwspin_lock_request_specific() 2018-06-26 13:52:27 -07:00
spi-st-ssc4.c spi: st-ssc4: whitespace cleanup 2017-05-26 12:41:07 +01:00
spi-stm32.c spi: stm32: Fix error handling in stm32_spi_probe() 2018-04-17 11:46:23 +01:00
spi-sun4i.c spi: sun4i: disable clocks in the remove function 2017-12-07 11:59:15 +00:00
spi-sun6i.c spi: sun6i: disable/unprepare clocks on remove 2017-12-07 17:45:17 +00:00
spi-tegra20-sflash.c spi: tegra20-sflash: explicitly request exclusive reset control 2017-07-19 17:06:31 +01:00
spi-tegra20-slink.c spi: tegra20-slink: explicitly enable/disable clock 2018-09-03 12:23:41 +01:00
spi-tegra114.c spi: tegra114: correct register name in definition 2017-10-09 10:16:38 +01:00
spi-test.h spi: loopback-test: add elapsed time check 2017-03-17 21:54:08 +00:00
spi-ti-qspi.c spi: ti-qspi: Make sure res_mmap != NULL before dereferencing it 2018-05-17 13:36:00 +09:00
spi-tle62x0.c
spi-topcliff-pch.c
spi-txx9.c
spi-uniphier.c spi: uniphier: remove unnecessary include headers 2018-08-02 11:08:06 +01:00
spi-xcomm.c
spi-xilinx.c spi: xilinx: Add support for xlnx,axi-quad-spi-1.00.a 2017-11-27 16:31:20 +00:00
spi-xlp.c spi: xlp: fix error return code in xlp_spi_probe() 2017-08-08 11:36:07 +01:00
spi-xtensa-xtfpga.c spi: add flags parameter to txrx_word function pointers 2018-08-01 14:50:24 +01:00
spi-zynqmp-gqspi.c spi: simplify getting .drvdata 2018-04-20 17:53:20 +01:00
spi.c spi: Fix double IDR allocation with DT aliases 2018-08-28 20:46:27 +01:00
spidev.c Merge branch 'for-spi' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-07-08 10:41:53 -07:00