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remarkable-linux/drivers/i2c/busses
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Alexander Monakov f4f05f62d3 i2c: designware: fix poll-after-enable regression 
commit 06cb616b1b upstream.

Not all revisions of DW I2C controller implement the enable status register.
On platforms where that's the case (e.g. BG2CD and SPEAr ARM SoCs), waiting
for enable will time out as reading the unimplemented register yields zero.

It was observed that reading the IC_ENABLE_STATUS register once suffices to
avoid getting it stuck on Bay Trail hardware, so replace polling with one
dummy read of the register.

Fixes: fba4adbbf6 ("i2c: designware: must wait for enable")
Signed-off-by: Alexander Monakov <amonakov@ispras.ru>
Tested-by: Ben Gardner <gardner.ben@gmail.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-22 18:53:58 +02:00
..
i2c-acorn.c i2c: acorn: is tristate and should use module.h 2014-01-24 18:21:11 +01:00
i2c-ali15x3.c Annotate hardware config module parameters in drivers/i2c/ 2017-04-20 12:02:32 +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-altera.c i2c: altera: Add Altera I2C Controller driver 2017-09-13 23:37:16 +02:00
i2c-amd756-s4882.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-amd756.c i2c: don't print error when adding adapter fails 2016-08-22 08:19:55 +02:00
i2c-amd8111.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
i2c-aspeed.c Merge branch 'i2c/for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2017-09-09 14:18:40 -07:00
i2c-at91.c i2c: busses: make i2c_adapter_quirks const 2017-08-29 22:32:47 +02:00
i2c-au1550.c i2c: au1550: Convert to devm_kzalloc and devm_ioremap_resource 2015-10-23 23:31:11 +02:00
i2c-axxia.c i2c: constify i2c_adapter_quirks structures 2016-11-18 02:05:03 +01:00
i2c-bcm-iproc.c i2c: use dev_get_drvdata() to get private data in suspend/resume hooks 2017-07-31 17:03:32 +02:00
i2c-bcm-kona.c Merge branch 'i2c/for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2016-10-07 14:12:21 -07:00
i2c-bcm2835.c i2c: bcm2835: Set up the rising/falling edge delays 2018-02-28 10:19:39 +01:00
i2c-bfin-twi.c blackfin: merge the two TWI header files 2017-08-27 15:37:18 +02:00
i2c-brcmstb.c i2c: brcmstb: Fix START and STOP conditions 2017-03-08 18:00:49 +01:00
i2c-cadence.c i2c: use dev_get_drvdata() to get private data in suspend/resume hooks 2017-07-31 17:03:32 +02:00
i2c-cbus-gpio.c i2c: busses: drop owner assignment from platform_drivers 2014-10-20 16:20:37 +02:00
i2c-cht-wc.c i2c-cht-wc: make cht_wc_i2c_adap_driver static 2017-08-29 12:09:06 +02:00
i2c-cpm.c i2c: busses: make i2c_adapter_quirks const 2017-08-29 22:32:47 +02:00
i2c-cros-ec-tunnel.c i2c: i2c-cros-ec-tunnel: Reduce logging noise 2017-01-28 22:16:38 +01:00
i2c-davinci.c i2c: davinci: Preserve return value of devm_clk_get 2017-08-27 15:34:09 +02:00
i2c-designware-baytrail.c i2c: designware-baytrail: fix potential null pointer dereference on dev 2017-04-19 21:00:13 +02:00
i2c-designware-common.c i2c: designware: add SLAVE mode functions 2017-06-27 23:36:28 +02:00
i2c-designware-core.h i2c: designware: Let slave adapter support be optional 2017-07-04 16:12:45 +02:00
i2c-designware-master.c i2c: designware: fix poll-after-enable regression 2018-05-22 18:53:58 +02:00
i2c-designware-pcidrv.c i2c: designware: MASTER mode as separated driver 2017-06-19 18:24:59 +02:00
i2c-designware-platdrv.c Merge branch 'i2c/for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2017-09-09 14:18:40 -07:00
i2c-designware-slave.c Merge branch 'i2c/for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2017-09-09 14:18:40 -07:00
i2c-digicolor.c i2c: digicolor: use clk_disable_unprepare instead of clk_unprepare 2016-11-18 01:48:01 +01:00
i2c-diolan-u2c.c i2c: don't print error when adding adapter fails 2016-08-22 08:19:55 +02:00
i2c-dln2.c i2c: constify i2c_adapter_quirks structures 2016-11-18 02:05:03 +01:00
i2c-efm32.c i2c: don't print error when adding adapter fails 2016-08-22 08:19:55 +02:00
i2c-eg20t.c i2c: busses: constify i2c_algorithm structures 2017-02-09 17:06:52 +01:00
i2c-elektor.c Annotate hardware config module parameters in drivers/i2c/ 2017-04-20 12:02:32 +01:00
i2c-emev2.c i2c: emev2: Handle return value of clk_prepare_enable 2017-06-19 22:18:55 +02:00
i2c-exynos5.c i2c: use dev_get_drvdata() to get private data in suspend/resume hooks 2017-07-31 17:03:32 +02:00
i2c-gpio.c i2c: Convert to using %pOF instead of full_name 2017-07-31 17:19:35 +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: use dev_get_drvdata() to get private data in suspend/resume hooks 2017-07-31 17:03:32 +02:00
i2c-hydra.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-i801.c i2c: i801: Restore configuration at shutdown 2018-04-24 09:36:27 +02:00
i2c-ibm_iic.c sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
i2c-ibm_iic.h
i2c-img-scb.c Update James Hogan's email address 2017-10-04 17:11:53 -07:00
i2c-imx-lpi2c.c Merge branch 'i2c/for-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2017-02-25 14:21:18 -08:00
i2c-imx.c i2c: imx: fix misleading bus recovery debug message 2017-10-13 21:05:55 +02:00
i2c-iop3xx.c i2c: iop3xx: use new 8 bit address helper function 2016-04-11 18:54:59 +02:00
i2c-iop3xx.h i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-isch.c i2c: don't print error when adding adapter fails 2016-08-22 08:19:55 +02:00
i2c-ismt.c i2c: ismt: Separate I2C block read from SMBus block read 2017-10-13 20:31:03 +02:00
i2c-jz4780.c i2c: jz4780: Fix module autoload 2016-10-25 11:48:58 +02:00
i2c-kempld.c i2c: busses: make i2c_adapter const 2017-08-29 22:26:08 +02:00
i2c-lpc2k.c i2c: use dev_get_drvdata() to get private data in suspend/resume hooks 2017-07-31 17:03:32 +02:00
i2c-meson.c i2c: meson: improve and simplify interrupt handler 2017-03-30 17:31:29 +02:00
i2c-mlxcpld.c i2c: busses: make i2c_adapter_quirks const 2017-08-29 22:32:47 +02:00
i2c-mpc.c sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
i2c-mt65xx.c i2c: mediatek: Add i2c compatible for MediaTek MT7622 2017-08-27 15:31:00 +02:00
i2c-mv64xxx.c i2c: mv64xxx: explicitly request exclusive reset control 2017-08-14 21:40:07 +02:00
i2c-mxs.c i2c: mxs: change error printing to debug for mxs_i2c_pio_wait_xfer_end 2017-06-02 22:57:14 +02:00
i2c-nforce2-s4985.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-nforce2.c i2c: busses: constify i2c_algorithm structures 2017-02-09 17:06:52 +01:00
i2c-nomadik.c i2c: nomadik: constify amba_id 2017-08-29 22:35:14 +02:00
i2c-ocores.c i2c: busses: make i2c_adapter const 2017-08-29 22:26:08 +02:00
i2c-octeon-core.c i2c: octeon: thunderx: Limit register access retries 2016-12-17 19:27:44 +01:00
i2c-octeon-core.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
i2c-octeon-platdrv.c i2c: busses: make i2c_adapter const 2017-08-29 22:26:08 +02:00
i2c-omap.c i2c: omap: Fix error handling for clk_get() 2017-10-18 00:19:26 +02:00
i2c-opal.c i2c: busses: make i2c_adapter_quirks const 2017-08-29 22:32:47 +02:00
i2c-parport-light.c Annotate hardware config module parameters in drivers/i2c/ 2017-04-20 12:02:32 +01:00
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 Annotate hardware config module parameters in drivers/i2c/ 2017-04-20 12:02:32 +01:00
i2c-pca-platform.c i2c: pca-platform: propagate error from i2c_pca_add_numbered_bus 2017-07-04 16:03:42 +02:00
i2c-piix4.c i2c: piix4: Disable completely the IMC during SMBUS_BLOCK_DATA 2017-10-13 21:05:56 +02:00
i2c-pmcmsp.c i2c: constify internal structures 2017-08-12 13:25:17 +02:00
i2c-pnx.c i2c: busses: make i2c_algorithm const 2017-08-29 22:20:20 +02:00
i2c-powermac.c i2c: busses: make i2c_adapter_quirks const 2017-08-29 22:32:47 +02:00
i2c-puv3.c i2c: busses: make i2c_algorithm const 2017-08-29 22:20:20 +02:00
i2c-pxa-pci.c i2c: i2c-pxa-pci; make explicitly non-modular 2016-11-18 01:44:38 +01:00
i2c-pxa.c i2c: use dev_get_drvdata() to get private data in suspend/resume hooks 2017-07-31 17:03:32 +02:00
i2c-qup.c i2c: busses: make i2c_adapter_quirks const 2017-08-29 22:32:47 +02:00
i2c-rcar.c i2c: rcar: avoid unused ret variable 2017-08-17 21:52:36 +02:00
i2c-riic.c i2c: riic: fix restart condition 2017-03-08 17:54:59 +01:00
i2c-rk3x.c i2c: rk3x: add support for rv1108 2017-08-12 16:39:47 +02:00
i2c-robotfuzz-osif.c i2c: busses: constify i2c_algorithm structures 2017-02-09 17:06:52 +01:00
i2c-s3c2410.c i2c: use dev_get_drvdata() to get private data in suspend/resume hooks 2017-07-31 17:03:32 +02:00
i2c-scmi.c i2c: i2c-scmi: add a MS HID 2017-04-16 21:48:06 +02:00
i2c-sh7760.c i2c: don't print error when adding adapter fails 2016-08-22 08:19:55 +02:00
i2c-sh_mobile.c i2c: sh_mobile: avoid unused ret variable 2017-08-17 21:52:57 +02:00
i2c-sibyte.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-simtec.c i2c: simtec: use release_mem_region instead of release_resource 2017-08-14 21:39:21 +02:00
i2c-sirf.c i2c: use dev_get_drvdata() to get private data in suspend/resume hooks 2017-07-31 17:03:32 +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 Annotate hardware config module parameters in drivers/i2c/ 2017-04-20 12:02:32 +01:00
i2c-sprd.c i2c: ensure termination of *_device_id tables 2017-10-05 14:44:57 +02:00
i2c-st.c i2c: use dev_get_drvdata() to get private data in suspend/resume hooks 2017-07-31 17:03:32 +02:00
i2c-stm32.h i2c: i2c-stm32f4: use generic definition of speed enum 2017-09-14 17:34:29 +02:00
i2c-stm32f4.c i2c: i2c-stm32f4: use generic definition of speed enum 2017-09-14 17:34:29 +02:00
i2c-stm32f7.c i2c: i2c-stm32f7: fix no check on returned setup 2018-04-08 14:26:27 +02:00
i2c-stu300.c i2c: don't print error when adding adapter fails 2016-08-22 08:19:55 +02:00
i2c-sun6i-p2wi.c i2c: sun6i-pw2i: explicitly request exclusive reset control 2017-08-14 21:40:21 +02:00
i2c-taos-evm.c i2c: taos-evm: constify serio_device_id 2017-08-17 17:36:42 +02:00
i2c-tegra-bpmp.c i2c: tegra: fix spelling mistake: "contoller" -> "controller" 2017-04-21 14:04:57 +02:00
i2c-tegra.c i2c: busses: make i2c_adapter_quirks const 2017-08-29 22:32:47 +02:00
i2c-thunderx-pcidrv.c i2c: busses: make i2c_adapter const 2017-08-29 22:26:08 +02:00
i2c-tiny-usb.c i2c: i2c-tiny-usb: fix buffer not being DMA capable 2017-05-22 10:33:42 +02:00
i2c-uniphier-f.c i2c: uniphier-f: add suspend / resume support 2017-08-12 15:38:23 +02:00
i2c-uniphier.c i2c: uniphier: add suspend / resume support 2017-08-12 15:38:13 +02:00
i2c-versatile.c i2c: versatile: Make i2c_algo_bit_data const 2017-08-29 22:34:12 +02:00
i2c-via.c i2c: remove FSF address 2014-11-07 18:35:33 +01:00
i2c-viapro.c Annotate hardware config module parameters in drivers/i2c/ 2017-04-20 12:02:32 +01:00
i2c-viperboard.c i2c: constify i2c_adapter_quirks structures 2016-11-18 02:05:03 +01:00
i2c-wmt.c i2c: don't print error when adding adapter fails 2016-08-22 08:19:55 +02:00
i2c-xgene-slimpro.c i2c: xgene-slimpro: include linux/io.h for memremap 2017-06-18 14:59:45 +02:00
i2c-xiic.c i2c: busses: make i2c_adapter const 2017-08-29 22:26:08 +02:00
i2c-xlp9xx.c i2c: xlp9xx: Enable HWMON class probing for xlp9xx 2017-06-19 16:22:54 +02:00
i2c-xlr.c i2c: busses: constify i2c_algorithm structures 2017-02-09 17:06:52 +01:00
i2c-zx2967.c i2c: zx2967: always use the same device when printing errors 2017-06-27 23:21:00 +02:00
Kconfig i2c: i801: Add support for Intel Cedar Fork 2017-10-05 14:44:56 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
scx200_acb.c Annotate hardware config module parameters in drivers/i2c/ 2017-04-20 12:02:32 +01:00