Lubomir Rintel 8239185619 spi: pxa2xx: Deal with the leftover garbage in TXFIFO ... There doesn't seem to be a way to empty TXFIFO on MMP2. The datasheet is super-secret and the method described in Armada 16x manual won't work: "The TXFIFO and RXFIFO are cleared to 0b0 when the SSPx port is reset or disabled (by writing a 0b0 to the <Synchronous Serial Port Enable> field in the SSP Control Register 0)." # devmem 0xd4037008 # read SSSR 0x0000F204 # devmem 0xd4037000 32 0x07 # SSE off in SSCR0 # devmem 0xd4037000 32 0x87 # SSE on # devmem 0xd4037008 0x0000F204 ^ TXFIFO level is still 2. Sigh. The OLPC 1.75 boot firmware leaves two bytes in the TXFIFO. Those are basically throwaway bytes used in response to the messages from the EC. The OLPC kernel copes with this by power-cycling the hardware. Perhaps the firmware should do this instead. Other than that, there's not much we can do other than complain loudly until the garbage gets drained and discard the actual data... For the OLPC EC this will work just fine and pushing more data to TXFIFO would break further transactions. Signed-off-by: Lubomir Rintel <lkundrak@v3.sk> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Mark Brown <broonie@kernel.org>		2018-11-13 10:02:27 -08:00
..
internals.h	spi: Add an helper to flush the message queue	2018-04-23 15:48:18 +01:00
Kconfig	spi: Kconfig: Enable McSPI driver for K3 platforms	2018-11-07 14:55:59 +00:00
Makefile	spi: Add MXIC controller driver	2018-11-05 11:55:06 +00:00
spi-altera.c
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-at91-usart.c	spi: at91-usart: Make local functions static	2018-09-11 11:43:07 +01:00
spi-ath79.c	spi: add flags parameter to txrx_word function pointers	2018-08-01 14:50:24 +01:00
spi-atmel.c	spi: Do not print a message if spi_controller_{suspend,resume}() fails	2018-09-05 12:38:27 +01:00
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-bcm63xx-hsspi.c	spi/bcm63xx-hsspi: keep pll clk enabled	2018-09-18 09:16:34 -07:00
spi-bcm63xx.c
spi-bcm2835.c
spi-bcm2835aux.c	spi: bcm2835aux: ensure interrupts are enabled for shared handler	2018-05-04 08:09:02 +09:00
spi-bcm-qspi.c	spi: bcm-qspi: switch back to reading flash using smaller chunks	2018-10-11 15:00:34 +01:00
spi-bcm-qspi.h
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	spi: spi-davinci: Don't error when SPI_CS_WORD and cs_gpio	2018-09-18 10:40:34 -07:00
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	dw: spi: add support for Amazon's Alpine spi controller	2018-10-11 15:11:04 +01:00
spi-dw-pci.c
spi-dw.c	dw: spi: add support for Amazon's Alpine spi controller	2018-10-11 15:11:04 +01:00
spi-dw.h	dw: spi: add support for Amazon's Alpine spi controller	2018-10-11 15:11:04 +01:00
spi-efm32.c
spi-ep93xx.c	spi: spi-ep93xx: Use dma_data_direction for ep93xx_spi_dma_{finish,prepare}	2018-10-09 00:11:28 +01:00
spi-falcon.c
spi-fsl-cpm.c
spi-fsl-cpm.h
spi-fsl-dspi.c	spi: spi-fsl-dspi: use IRQF_SHARED mode to request IRQ	2018-11-05 11:53:28 +00:00
spi-fsl-espi.c	spi: Do not print a message if spi_controller_{suspend,resume}() fails	2018-09-05 12:38:27 +01:00
spi-fsl-lib.c
spi-fsl-lib.h
spi-fsl-lpspi.c	spi: fsl-lpspi: Prevent FIFO under/overrun by default	2018-10-10 12:41:36 +01:00
spi-fsl-spi.c
spi-fsl-spi.h
spi-geni-qcom.c	spi: spi-geni-qcom: Simplify probe function	2018-11-05 11:53:52 +00:00
spi-gpio.c	Merge branch 'spi-4.20' into spi-next	2018-10-21 17:00:14 +01:00
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 PIO mode if size is small	2018-10-12 18:54:02 +02:00
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
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-lp8841-rtc.c
spi-mem.c	spi: spi-mem: Fix inverted logic in op sanity check	2018-09-27 23:29:57 +01:00
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	Merge branch 'spi-4.20' into spi-4.21 for uniphier DT	2018-11-06 19:08:00 +00:00
spi-mxic.c	spi: Add MXIC controller driver	2018-11-05 11:55:06 +00:00
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-omap2-mcspi.c	spi: omap2-mcspi: Add slave mode support	2018-10-19 13:32:59 +01:00
spi-omap-100k.c
spi-omap-uwire.c
spi-orion.c	spi: orion: cosmetics - alias long direct_access variables	2018-09-03 15:14:18 +01:00
spi-pic32-sqi.c	spi: pic32-sqi: don't pass GFP_DMA32 to dma_alloc_coherent	2018-10-17 11:11:32 +01:00
spi-pic32.c	spi: pic32: Use proper enum in dmaengine_prep_slave_rg	2018-09-20 18:11:22 -07:00
spi-pl022.c	spi: pl022: Remove set but not used variable 'chip'	2018-09-07 17:03:48 +01:00
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: Deal with the leftover garbage in TXFIFO	2018-11-13 10:02:27 -08:00
spi-pxa2xx.h	spi: pxa2xx: Add ready signal	2018-11-13 10:02:09 -08:00
spi-qcom-qspi.c	spi: Introduce new driver for Qualcomm QuadSPI controller	2018-10-11 15:11:09 +01:00
spi-qup.c
spi-rb4xx.c	spi: rb4xx: Use SPI_BPW_MASK to set bits_per_word_mask	2018-10-10 12:48:06 +01:00
spi-rockchip.c	spi: rockchip: support lsb-first mode	2018-11-05 11:42:43 +00:00
spi-rspi.c	spi: spi-rspi: simplify getting .driver_data	2018-11-05 11:54:50 +00:00
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-sh-hspi.c	spi: use SPDX identifier for Renesas drivers	2018-08-28 20:32:00 +01:00
spi-sh-msiof.c	spi: spi-sh-msiof: simplify getting .driver_data	2018-11-05 11:54:20 +00:00
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: use SPDX identifier for Renesas drivers	2018-08-28 20:32:00 +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-mt27xx.c	spi: mediatek: add spi slave for Mediatek MT2712	2018-09-28 14:29:14 +01:00
spi-slave-system-control.c	spi: slave: Fix missing break in switch	2018-10-03 16:23:10 +01:00
spi-slave-time.c
spi-sprd-adi.c	spi: sprd: Change to use devm_hwspin_lock_request_specific()	2018-06-26 13:52:27 -07:00
spi-sprd.c	spi: sprd: don't mark remove function as __exit	2018-09-27 23:26:43 +01:00
spi-st-ssc4.c
spi-stm32-qspi.c	spi: spi-mem: add stm32 qspi controller	2018-10-19 13:32:56 +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-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-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-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: spi-zynqmp-gqspi: simplify getting .driver_data	2018-11-05 11:54:35 +00:00
spi.c	spi: Deal with slaves that return from transfer_one() unfinished	2018-11-13 10:01:23 -08:00
spidev.c	spi: spidev: Fix OF tree warning logic	2018-10-10 13:46:54 +01:00