Lubomir Rintel 29d7e05c5f spi: pxa2xx: Avoid touching SSCR0_SSE on MMP2 ... A read from a Winbond W25Q32FV SPI NOR memory chip on my MMP2 returns wrong data. It seems like SSE doesn't do the right thing on MMP2 at all. After enabling the SPI port back again, the FIFO reads return garbage. Things can be brought back to order by telling the PMU to reset the block. Here's a good transaction with said chip: # busybox devmem 0xd4035000 32 0x00001987 # SSCR0 # echo 0 >/sys/class/gpio/gpio46/value # (assert CS) # busybox devmem 0xd4035010 32 0x0000009f # SSDR (read ID command) # busybox devmem 0xd4035010 32 0x00000000 # SSDR # busybox devmem 0xd4035010 32 0x00000000 # SSDR # busybox devmem 0xd4035010 32 0x00000000 # SSDR # busybox devmem 0xd4035010 32 0x00000000 # SSDR # busybox devmem 0xd4035010 32 0x00000000 # SSDR # busybox devmem 0xd4035010 32 0x00000000 # SSDR # busybox devmem 0xd4035010 # SSDR 0x000000ff # busybox devmem 0xd4035010 # SSDR 0x000000ef # Correct response # busybox devmem 0xd4035010 # SSDR 0x00000040 # busybox devmem 0xd4035010 # SSDR 0x00000016 # busybox devmem 0xd4035010 # SSDR 0x00000000 # busybox devmem 0xd4035010 # SSDR 0x00000000 # busybox devmem 0xd4035010 # SSDR 0x00000000 # echo 1 >/sys/class/gpio/gpio46/value # (deassert CS) # Flipping off an on SSE, then running another transaction: # busybox devmem 0xd4035000 32 0x00001907 # SSCR0, SSE off # busybox devmem 0xd4035000 32 0x00001987 # SSCR0, SSE on # echo 0 >/sys/class/gpio/gpio46/value # (assert CS) # busybox devmem 0xd4035010 32 0x0000009f # SSDR (read ID command) # busybox devmem 0xd4035010 32 0x00000000 # SSDR # busybox devmem 0xd4035010 32 0x00000000 # SSDR # busybox devmem 0xd4035010 32 0x00000000 # SSDR # busybox devmem 0xd4035010 32 0x00000000 # SSDR # busybox devmem 0xd4035010 32 0x00000000 # SSDR # busybox devmem 0xd4035010 32 0x00000000 # SSDR # busybox devmem 0xd4035010 # SSDR 0x000000ff # busybox devmem 0xd4035010 # SSDR 0x000000ff # Garbage! # busybox devmem 0xd4035010 # SSDR 0x000000ff # Oh no # busybox devmem 0xd4035010 # SSDR 0x000000ff # busybox devmem 0xd4035010 # SSDR 0x000000ff # busybox devmem 0xd4035010 # SSDR 0x000000ff # busybox devmem 0xd4035010 # SSDR 0x000000ff # echo 1 >/sys/class/gpio/gpio46/value # (deassert CS) # Sometimes the response is not just ones, but something that looks like bits of a response from a previous transaction. I can't see a fix other than not touching the SSE altogether after the device is first brought up. Signed-off-by: Lubomir Rintel <lkundrak@v3.sk> Link: https://lore.kernel.org/r/20200118094031.327373-1-lkundrak@v3.sk Signed-off-by: Mark Brown <broonie@kernel.org>		2020-01-21 17:17:35 +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() directly for channel request	2019-11-15 12:13:22 +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-bcm-qspi.c	spi: bcm-qspi: Convert to use CS GPIO descriptors	2019-11-07 13:10:57 +00:00
spi-bcm-qspi.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 459	2019-06-19 17:09:09 +02:00
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	Merge branch 'spi-5.4' into spi-next	2019-09-15 10:32:06 +01:00
spi-bcm2835aux.c	spi: bcm2835aux: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:16:08 +01:00
spi-bitbang-txrx.h
spi-bitbang.c	Linux 5.2-rc4	2019-06-10 18:52:53 +01:00
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	spi: dw: Add compatible string for Renesas RZ/N1 SPI Controller	2019-10-01 12:33:19 +01:00
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	spi: dw: use "smp_mb()" to avoid sending spi data error	2020-01-06 20:49:03 +00:00
spi-dw.h	spi: spi-dw: Add lock protect dw_spi rx/tx to prevent concurrent calls	2020-01-03 00:59:40 +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-spi: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:24:26 +01:00
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: Fix 16-bit word order in 32-bit XSPI mode	2019-12-31 00:29:36 +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 dma_request_chan() directly for channel request	2019-11-15 12:13:41 +00:00
spi-fsl-qspi.c	spi: spi-fsl-qspi: Ensure width is respected in spi-mem operations	2020-01-21 17:08:27 +00:00
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: fix potential double release	2019-11-06 15:33:39 +00:00
spi-imx.c	spi: imx: Use dma_request_chan() directly for channel request	2019-11-15 12:14:00 +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 devm_platform_ioremap_resource() to simplify code	2019-09-04 17:18:55 +01:00
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 devm_platform_ioremap_resource() to simplify code	2019-09-04 17:19:54 +01:00
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-pspi: fix 16 bit send and receive support	2020-01-17 15:35:51 +00:00
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 devm_platform_ioremap_resource() to simplify code	2019-09-04 17:20:33 +01:00
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-omap2-mcspi.c	spi: omap2-mcspi: Remove redundant checks	2019-11-11 12:50:26 +00:00
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	spi: pxa2xx: Avoid touching SSCR0_SSE on MMP2	2020-01-21 17:17:35 +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: Fix handling of QSPI code when transmit and receive	2019-05-02 10:38:44 +09:00
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: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:21:41 +01:00
spi-sirf.c	spi: sirf: use devm_platform_ioremap_resource() to simplify code	2019-09-04 17:22:00 +01:00
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: Fix kernel oops when unbinding driver	2019-10-04 18:47:21 +01:00
spi-stm32.c	spi: stm32: return the get_irq error	2019-05-02 10:38:41 +09:00
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 dma_request_chan() directly for channel request	2019-11-15 12:15:01 +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	spi: spi-ti-qspi: Fix a bug when accessing non default CS	2019-12-11 16:48:32 +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: use new spi_transfer_delay_exec helper where straightforward	2019-10-15 11:51:57 +01:00
spi-txx9.c	spi: txx9: Convert to use GPIO descriptors	2019-10-30 14:14:32 +00:00
spi-uniphier.c	spi: uniphier: Fix FIFO threshold	2019-12-25 00:05:00 +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: Don't look at TX buffer for PTP system timestamping	2019-12-27 23:03:43 +00:00
spidev.c	spi: spidev: use new delay field for spi transfers	2019-10-15 11:45:29 +01:00