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linux-stable/drivers/i2c/busses
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Sifan Naeem 0e59378bc0 i2c: img-scb: enable fencing for all versions of the ip 
The code to read from the master read fifo, and write to the master
write fifo, checks a bit in an SCB register before every byte to
ensure that the fifo is not full (write fifo) or empty (read fifo).
Due to clock domain crossing inside the SCB block the updated value
of this bit is only visible after 2 cycles.

The scb_wr_rd_fence() function does 2 dummy writes (to the read-only
revision register), and it's called before reading from or writing to the
fifos to ensure that subsequent reads of the fifo status bits do not read
stale values.

As the 2 dummy writes are required in all versions of the ip, the version
check is dropped.

Fixes: commit 27bce457d5 ("i2c: img-scb: Add Imagination Technologies I2C SCB driver")
Signed-off-by: Sifan Naeem <sifan.naeem@imgtec.com>
Acked-by: James Hogan <james.hogan@imgtec.com>
Reviewed-by: James Hartley <james.hartley@imgtec.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-10-10 08:37:41 +01:00
..
i2c-acorn.c i2c: acorn: is tristate and should use module.h 2014-01-24 18:21:11 +01:00
i2c-ali15x3.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-ali1535.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-ali1563.c i2c: ali1563: fix checkpatch.pl issues 2014-05-22 10:09:21 +02:00
i2c-amd756-s4882.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-amd756.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-amd8111.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
i2c-at91.c i2c: at91: fix code checker warnings 2015-06-11 22:12:53 +09:00
i2c-au1550.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
i2c-axxia.c i2c: axxia: Add bus recovery functionality 2015-06-03 00:40:16 +09:00
i2c-bcm-iproc.c i2c: iproc: Add suspend/resume support 2015-06-03 03:04:53 +09:00
i2c-bcm-kona.c i2c: busses: drop owner assignment from platform_drivers 2014-10-20 16:20:37 +02:00
i2c-bcm2835.c i2c: busses: i2c-bcm2835: limits cdiv to allowed values 2015-06-23 19:55:19 +02:00
i2c-bfin-twi.c i2c: Fix typo in i2c-bfin-twi.c 2015-07-31 13:32:31 +02:00
i2c-brcmstb.c i2c: brcmstb: Add Broadcom settop SoC i2c controller driver 2015-06-10 22:02:57 +09:00
i2c-cadence.c i2c: cadence: set THIS_MODULE to the owner of the adapter 2015-08-10 08:37:38 +02:00
i2c-cbus-gpio.c i2c: busses: drop owner assignment from platform_drivers 2014-10-20 16:20:37 +02:00
i2c-cpm.c i2c: cpm: make use of the new infrastructure for quirks 2015-03-13 15:10:54 +01:00
i2c-cros-ec-tunnel.c mfd: cros_ec: Use a zero-length array for command data 2015-06-15 13:18:19 +01:00
i2c-davinci.c i2c: davinci: Optimize SCL generation 2015-06-17 14:40:58 +02:00
i2c-designware-baytrail.c i2c: designware-baytrail: baytrail_i2c_acquire() might sleep 2015-03-07 01:08:26 +01:00
i2c-designware-core.c i2c: designware: Make debug print in i2c_dw_isr() shorter 2015-08-10 08:37:36 +02:00
i2c-designware-core.h i2c: designware: Add Intel Baytrail PMIC I2C bus support 2015-01-26 12:26:25 +01:00
i2c-designware-pcidrv.c i2c: designware-pci: use IRQF_COND_SUSPEND flag 2015-08-10 08:37:35 +02:00
i2c-designware-platdrv.c i2c: designware: Make sure the device is suspended before disabling runtime PM 2015-06-21 21:30:35 +02:00
i2c-digicolor.c i2c: digicolor: remove duplicate include 2015-04-23 19:35:32 +02:00
i2c-diolan-u2c.c i2c: remove unnecessary OOM messages 2014-06-02 19:24:33 +02:00
i2c-dln2.c i2c: dln2: set the device tree node of the adapter 2015-03-27 16:56:21 +01:00
i2c-efm32.c i2c: busses: drop owner assignment from platform_drivers 2014-10-20 16:20:37 +02:00
i2c-eg20t.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-elektor.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-emev2.c i2c: emev2: add driver 2015-08-10 08:37:29 +02:00
i2c-exynos5.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
i2c-gpio.c i2c: busses: drop owner assignment from platform_drivers 2014-10-20 16:20:37 +02:00
i2c-highlander.c i2c: busses: drop owner assignment from platform_drivers 2014-10-20 16:20:37 +02:00
i2c-hix5hd2.c i2c: hix5hd2: Fix modalias to make module auto-loading work 2015-05-12 18:09:33 +02:00
i2c-hydra.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-i801.c i2c: i801: Create iTCO device on newer Intel PCHs 2015-08-11 15:03:51 +01:00
i2c-ibm_iic.c i2c: busses: drop owner assignment from platform_drivers 2014-10-20 16:20:37 +02:00
i2c-ibm_iic.h
i2c-img-scb.c i2c: img-scb: enable fencing for all versions of the ip 2015-10-10 08:37:41 +01:00
i2c-imx.c i2c: constify platform_device_id 2015-05-12 18:27:48 +02:00
i2c-iop3xx.c i2c: busses: drop owner assignment from platform_drivers 2014-10-20 16:20:37 +02:00
i2c-iop3xx.h i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-isch.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
i2c-ismt.c i2c: ismt: fix type of return var of wait_for_completion_timeout 2015-03-15 10:50:02 +01:00
i2c-jz4780.c i2c: jz4780: Fix return value if probe fails 2015-07-09 22:17:31 +02:00
i2c-kempld.c i2c: busses: drop owner assignment from platform_drivers 2014-10-20 16:20:37 +02:00
i2c-lpc2k.c i2c: lpc2k: add driver 2015-08-24 14:05:18 +02:00
i2c-meson.c i2c: add support for Amlogic Meson I2C controller 2014-11-18 16:16:44 +01:00
i2c-mpc.c i2c: mpc: Fix ISR return value 2015-03-27 16:53:41 +01:00
i2c-mt65xx.c i2c: mediatek: Fixup i2c ack error interrupt handling 2015-08-11 16:54:47 +02:00
i2c-mv64xxx.c i2c: mv64xxx: rework offload support to fix several problems 2014-12-17 19:26:03 +01:00
i2c-mxs.c i2c: constify platform_device_id 2015-05-12 18:27:48 +02:00
i2c-nforce2-s4985.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-nforce2.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-nomadik.c i2c: nomadik: match status to return type of read_i2c 2015-03-15 10:51:13 +01:00
i2c-ocores.c i2c: ocores: rework clk code to handle NULL cookie 2015-02-20 18:01:23 +01:00
i2c-octeon.c i2c: octeon: remove unused signal handling 2015-06-17 14:50:03 +02:00
i2c-omap.c i2c: omap: fix cleanup regression 2015-08-10 08:37:33 +02:00
i2c-opal.c i2c: opal: Update quirk flags to do write-then-anything 2015-03-14 12:08:21 +01:00
i2c-parport-light.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
i2c-parport.c i2c: parport: start using pr_fmt 2015-08-10 08:37:28 +02:00
i2c-parport.h i2c: parport: Add VCT-jig adapter 2015-08-10 08:37:34 +02:00
i2c-pasemi.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-pca-isa.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-pca-platform.c i2c: pca-platform: fix broken email address 2015-04-23 19:35:30 +02:00
i2c-piix4.c i2c-piix4: Use Macro for AMD CZ SMBus device ID 2015-06-16 08:58:06 +02:00
i2c-pmcmsp.c i2c: pmcmsp: make use of the new infrastructure for quirks 2015-03-13 15:10:58 +01:00
i2c-pnx.c i2c: busses: drop owner assignment from platform_drivers 2014-10-20 16:20:37 +02:00
i2c-powermac.c i2c: powermac: make use of the new infrastructure for quirks 2015-03-13 15:10:57 +01:00
i2c-puv3.c i2c: busses: drop owner assignment from platform_drivers 2014-10-20 16:20:37 +02:00
i2c-pxa-pci.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
i2c-pxa.c i2c: pxa: Use devm_ variants in probe function 2015-08-10 08:37:31 +02:00
i2c-qup.c i2c: qup: make use of the new infrastructure for quirks 2015-03-13 15:10:53 +01:00
i2c-rcar.c i2c: rcar: clean up after refactoring 2015-10-09 22:32:14 +01:00
i2c-riic.c i2c: busses: drop owner assignment from platform_drivers 2014-10-20 16:20:37 +02:00
i2c-rk3x.c i2c: rk3x: Increase wait timeout to 1 second 2015-05-12 15:15:17 +02:00
i2c-robotfuzz-osif.c i2c: Add bus driver for for OSIF USB i2c device. 2014-01-13 13:56:56 +01:00
i2c-s3c2410.c Merge branch 'i2c/for-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2015-06-25 18:42:39 -07:00
i2c-scmi.c i2c: delete non-required instances of include <linux/init.h> 2014-01-24 18:24:31 +01:00
i2c-sh7760.c i2c: busses: drop owner assignment from platform_drivers 2014-10-20 16:20:37 +02:00
i2c-sh_mobile.c i2c: sh_mobile: use proper type for timeout 2015-06-23 19:50:27 +02:00
i2c-sibyte.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-simtec.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
i2c-sirf.c i2c: busses: drop owner assignment from platform_drivers 2014-10-20 16:20:37 +02:00
i2c-sis96x.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-sis630.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-sis5595.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-st.c i2c: st: add include for pinctrl 2015-04-23 19:35:33 +02:00
i2c-stu300.c i2c: busses: drop owner assignment from platform_drivers 2014-10-20 16:20:37 +02:00
i2c-sun6i-p2wi.c i2c: busses: drop owner assignment from platform_drivers 2014-10-20 16:20:37 +02:00
i2c-taos-evm.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-tegra.c i2c: tegra: add support for fast plus (FM+) mode clock rate 2015-08-10 08:37:33 +02:00
i2c-tiny-usb.c
i2c-versatile.c i2c: busses: drop owner assignment from platform_drivers 2014-10-20 16:20:37 +02:00
i2c-via.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-viapro.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-viperboard.c i2c: viperboard: clean up inconsistent indenting 2015-08-10 08:37:38 +02:00
i2c-wmt.c i2c: wmt: match return type of wait_for_completion_timeout 2015-03-15 10:29:53 +01:00
i2c-xgene-slimpro.c i2c: xgene-slimpro: dma_mapping_error() doesn't return an error code 2015-08-24 14:23:31 +02:00
i2c-xiic.c i2c: xiic: Do not continue in case of errors in Rx 2015-08-10 08:37:33 +02:00
i2c-xlp9xx.c i2c: xlp9xx: Driver for Netlogic XLP9XX/5XX I2C controller 2015-04-10 18:59:49 +02:00
i2c-xlr.c i2c: busses: drop owner assignment from platform_drivers 2014-10-20 16:20:37 +02:00
Kconfig i2c: Replace I2C_CROS_EC_TUNNEL dependency 2015-08-24 14:17:53 +02:00
Makefile i2c: lpc2k: add driver 2015-08-24 14:05:18 +02:00
scx200_acb.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00