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linux/drivers/i2c/busses
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Robert Hancock 4ca8ca873d i2c: cadence: Change large transfer count reset logic to be unconditional 
Problems were observed on the Xilinx ZynqMP platform with large I2C reads.
When a read of 277 bytes was performed, the controller NAKed the transfer
after only 252 bytes were transferred and returned an ENXIO error on the
transfer.

There is some code in cdns_i2c_master_isr to handle this case by resetting
the transfer count in the controller before it reaches 0, to allow larger
transfers to work, but it was conditional on the CDNS_I2C_BROKEN_HOLD_BIT
quirk being set on the controller, and ZynqMP uses the r1p14 version of
the core where this quirk is not being set. The requirement to do this to
support larger reads seems like an inherently required workaround due to
the core only having an 8-bit transfer size register, so it does not
appear that this should be conditional on the broken HOLD bit quirk which
is used elsewhere in the driver.

Remove the dependency on the CDNS_I2C_BROKEN_HOLD_BIT for this transfer
size reset logic to fix this problem.

Fixes: 63cab195bf ("i2c: removed work arounds in i2c driver for Zynq Ultrascale+ MPSoC")
Signed-off-by: Robert Hancock <robert.hancock@calian.com>
Reviewed-by: Shubhrajyoti Datta <Shubhrajyoti.datta@amd.com>
Acked-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-07-16 14:44:12 +02:00
..
i2c-acorn.c
i2c-ali15x3.c i2c: Use separate MODULE_AUTHOR() statements for multiple authors 2020-07-04 08:25:13 +02:00
i2c-ali1535.c i2c: ali1535: mention that the device should not be disabled 2021-07-02 09:14:46 +02:00
i2c-ali1563.c i2c: busses: i2c-ali1563: File headers are not good candidates for kernel-doc 2021-05-27 21:29:26 +02:00
i2c-altera.c i2c: altera: Fix formatting issue in struct and demote unworthy kernel-doc headers 2021-06-03 22:25:24 +02:00
i2c-amd756-s4882.c
i2c-amd756.c
i2c-amd8111.c i2c: amd8111: Fix coding style issues 2021-04-15 22:24:11 +02:00
i2c-amd-mp2-pci.c i2c: amd-mp2: Remove useless DMA-32 fallback configuration 2022-02-07 15:32:14 +01:00
i2c-amd-mp2-plat.c i2c: amd-mp2-plat: ACPI: Use ACPI_COMPANION() directly 2021-11-07 14:57:41 +01:00
i2c-amd-mp2.h i2c: amd-mp2: Remove unused macro 2021-02-01 23:01:50 +01:00
i2c-aspeed.c i2c: aspeed: Remove unused includes 2021-12-16 22:27:16 +01:00
i2c-at91-core.c i2c: at91: mark PM ops as __maybe unused 2021-08-11 15:54:01 +02:00
i2c-at91-master.c i2c: at91: Initialize dma_buf in at91_twi_xfer() 2022-05-14 15:41:16 +02:00
i2c-at91-slave.c
i2c-at91.h i2c: at91: remove legacy DMA left overs 2020-11-03 21:34:40 +01:00
i2c-au1550.c
i2c-axxia.c
i2c-bcm2835.c Merge tag 'irq-api-2022-02-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into i2c/for-mergewindow 2022-02-23 14:14:15 +01:00
i2c-bcm-iproc.c i2c: iproc: fix race between client unreg and tasklet 2021-08-10 22:40:55 +02:00
i2c-bcm-kona.c i2c: bcm-kona: Fix return value in probe() 2021-09-29 23:05:05 +02:00
i2c-brcmstb.c i2c: brcmstb: fix support for DSL and CM variants 2022-02-18 10:37:33 +01:00
i2c-cadence.c i2c: cadence: Change large transfer count reset logic to be unconditional 2022-07-16 14:44:12 +02:00
i2c-cbus-gpio.c i2c: cbus-gpio: set atomic transfer callback 2021-11-29 09:52:10 +01:00
i2c-ccgx-ucsi.c i2c: Introduce common module to instantiate CCGx UCSI 2022-02-15 10:04:53 +01:00
i2c-ccgx-ucsi.h i2c: Introduce common module to instantiate CCGx UCSI 2022-02-15 10:04:53 +01:00
i2c-cht-wc.c Merge branch 'i2c/for-mergewindow' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2022-03-26 12:46:08 -07:00
i2c-cp2615.c i2c: cp2615: check for allocation failure in cp2615_i2c_recv() 2021-06-20 23:13:34 +02:00
i2c-cpm.c i2c: cpm: Fix i2c_ram structure 2020-09-27 15:14:16 +02:00
i2c-cros-ec-tunnel.c i2c: cros-ec-tunnel: Fix syntax errors in comments 2022-03-11 21:54:21 +01:00
i2c-davinci.c i2c: davinci: using pm_runtime_resume_and_get instead of pm_runtime_get_sync 2022-05-04 22:40:35 +02:00
i2c-designware-amdpsp.c i2c: designware: Modify timing parameters for amdpsp mailbox 2022-05-04 21:54:11 +02:00
i2c-designware-baytrail.c i2c: designware: Add AMD PSP I2C bus support 2022-02-11 15:38:23 +01:00
i2c-designware-common.c i2c: designware: Use standard optional ref clock implementation 2022-06-13 16:50:27 +02:00
i2c-designware-core.h i2c: designware: Use the i2c_mark_adapter_suspended/resumed() helpers 2022-03-01 16:31:39 +01:00
i2c-designware-master.c i2c: designware: Use the i2c_mark_adapter_suspended/resumed() helpers 2022-03-01 16:31:39 +01:00
i2c-designware-pcidrv.c i2c: designware: Use the i2c_mark_adapter_suspended/resumed() helpers 2022-03-01 16:31:39 +01:00
i2c-designware-platdrv.c i2c: designware: Use standard optional ref clock implementation 2022-06-13 16:50:27 +02:00
i2c-designware-slave.c i2c: designware: slave should do WRITE_REQUESTED before WRITE_RECEIVED 2020-11-06 16:02:00 +01:00
i2c-digicolor.c i2c: busses: Replace spin_lock_irqsave with spin_lock in hard IRQ 2021-02-12 08:21:57 +01:00
i2c-diolan-u2c.c
i2c-dln2.c
i2c-eg20t.c i2c: busses: i2c-eg20t: Fix 'bad line' issue and provide description for 'msgs' param 2021-05-27 21:33:10 +02:00
i2c-elektor.c Merge branch 'i2c/for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2021-02-22 09:02:24 -08:00
i2c-emev2.c i2c: emev2: add IRQ check 2021-04-14 10:20:00 +02:00
i2c-exynos5.c i2c: exynos5: Fix getting the optional clock 2021-12-16 22:21:27 +01:00
i2c-fsi.c i2c: fsi: Prevent adding adapters for ports without dts nodes 2020-07-24 21:31:33 +02:00
i2c-gpio.c i2c: gpio: fix MODULE_LICENCE 2021-01-05 17:30:45 +01:00
i2c-highlander.c i2c: highlander: add IRQ check 2021-08-03 22:48:39 +02:00
i2c-hisi.c i2c: add support for HiSilicon I2C controller 2021-04-10 21:54:05 +02:00
i2c-hix5hd2.c i2c: hix5hd2: fix IRQ check 2021-08-19 19:18:24 +02:00
i2c-hydra.c
i2c-i801.c i2c: i801: Drop two outdated comments 2022-03-11 21:33:08 +01:00
i2c-ibm_iic.c
i2c-ibm_iic.h
i2c-icy.c i2c: icy: Remove unused variable new_fwnode in icy_probe() 2021-05-25 21:21:32 +02:00
i2c-img-scb.c i2c: img-scb: fix reference leak when pm_runtime_get_sync fails 2021-04-14 09:49:06 +02:00
i2c-imx-lpi2c.c i2c: imx-lpi2c: fix reference leak when pm_runtime_get_sync fails 2021-04-14 09:49:09 +02:00
i2c-imx.c i2c: imx: fix typo in comment 2022-07-16 14:18:49 +02:00
i2c-iop3xx.c i2c: iop3xx: fix deferred probing 2021-08-19 19:18:17 +02:00
i2c-iop3xx.h
i2c-isch.c
i2c-ismt.c i2c: ismt: prevent memory corruption in ismt_access() 2022-06-02 08:40:56 -07:00
i2c-jz4780.c Merge branch 'i2c/for-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2021-04-30 13:01:02 -07:00
i2c-kempld.c i2c: kempld: deprecate class based instantiation 2021-09-29 23:07:02 +02:00
i2c-lpc2k.c
i2c-meson.c i2c: meson: fix typo in comment 2022-05-21 13:33:25 +02:00
i2c-mlxbf.c i2c: mlxbf: add IRQ check 2021-04-14 10:20:45 +02:00
i2c-mlxcpld.c i2c: mlxcpld: Fix register setting for 400KHz frequency 2022-07-16 14:17:11 +02:00
i2c-mpc.c Merge branch 'i2c/for-mergewindow' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2022-01-14 16:19:38 +01:00
i2c-mt65xx.c i2c: mediatek: Fix an error handling path in mtk_i2c_probe() 2022-06-14 22:11:54 +02:00
i2c-mt7621.c I2C for 5.19-rc1 2022-05-31 14:34:00 -07:00
i2c-mv64xxx.c i2c: mv64xxx: Fix random system lock caused by runtime PM 2021-04-15 22:13:19 +02:00
i2c-mxs.c i2c: mxs: : use proper DMAENGINE API for termination 2021-08-11 15:16:01 +02:00
i2c-nforce2-s4985.c
i2c-nforce2.c
i2c-nomadik.c i2c: busses: i2c-nomadik: Fix formatting issue pertaining to 'timeout' 2021-05-27 21:27:48 +02:00
i2c-npcm7xx.c i2c: npcm7xx: Add check for platform_driver_register 2022-06-08 22:15:37 +02:00
i2c-nvidia-gpu.c i2c: nvidia-gpu: Convert to use dev_err_probe() 2022-02-15 10:05:02 +01:00
i2c-ocores.c i2c: busses: i2c-ocores: Place the expected function names into the documentation headers 2021-05-27 21:33:41 +02:00
i2c-octeon-core.c i2c: octeon: check correct size of maximum RECV_LEN packet 2021-01-17 12:26:55 +01:00
i2c-octeon-core.h
i2c-octeon-platdrv.c
i2c-omap.c i2c: omap: fix reference leak when pm_runtime_get_sync fails 2021-04-14 09:49:17 +02:00
i2c-opal.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
i2c-owl.c i2c: owl: Add compatible for the Actions Semi S500 I2C controller 2020-12-09 21:23:21 +01:00
i2c-parport.c i2c: parport: Switch to use module_parport_driver() 2021-08-10 23:07:37 +02:00
i2c-pasemi-core.c i2c: pasemi: Wait for write xfers to finish 2022-04-15 23:12:02 +02:00
i2c-pasemi-core.h i2c: pasemi: Set enable bit for Apple variant 2021-10-11 11:45:56 +02:00
i2c-pasemi-pci.c i2c: pasemi: Drop I2C classes from platform driver variant 2022-02-15 10:28:34 +01:00
i2c-pasemi-platform.c i2c: pasemi: Add Apple platform driver 2021-10-11 11:45:48 +02:00
i2c-pca-isa.c isa: Make the remove callback for isa drivers return void 2021-01-26 07:42:27 +01:00
i2c-pca-platform.c i2c: pca-platform: drop two members from driver data that are assigned to only 2020-12-02 21:29:31 +01:00
i2c-piix4.c i2c: piix4: Fix a memory leak in the EFCH MMIO support 2022-06-29 21:35:44 +02:00
i2c-pnx.c i2c: busses: i2c-pnx: Provide descriptions for 'alg_data' data structure 2021-05-27 21:34:08 +02:00
i2c-powermac.c i2c: powermac: Prepare cleanup of powerpc's asm/prom.h 2022-05-04 22:32:45 +02:00
i2c-pxa-pci.c
i2c-pxa.c i2c: pxa: drop unneeded MODULE_ALIAS 2021-10-02 09:32:06 +02:00
i2c-qcom-cci.c Merge tag 'irq-api-2022-02-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into i2c/for-mergewindow 2022-02-23 14:14:15 +01:00
i2c-qcom-geni.c I2C for 5.19-rc1 2022-05-31 14:34:00 -07:00
i2c-qup.c i2c: qup: move to use request_irq by IRQF_NO_AUTOEN flag 2021-10-29 21:57:33 +02:00
i2c-rcar.c i2c: rcar: use flags instead of atomic_xfer 2022-05-21 12:55:32 +02:00
i2c-riic.c i2c: riic: Simplify reset handling 2022-03-01 16:05:01 +01:00
i2c-rk3x.c Merge branch 'i2c/for-mergewindow' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2022-01-14 16:19:38 +01:00
i2c-robotfuzz-osif.c i2c: robotfuzz-osif: fix control-request directions 2021-06-24 22:08:00 +02:00
i2c-s3c2410.c i2c: s3c2410: fix IRQ check 2021-08-19 19:18:24 +02:00
i2c-scmi.c i2c: i2c-scmi: Drop unused ACPI_MODULE_NAME definition 2021-03-18 12:11:45 +01:00
i2c-sh7760.c i2c: sh7760: fix IRQ error path 2021-04-17 22:00:58 +02:00
i2c-sh_mobile.c i2c: sh_mobile: remove unneeded semicolon 2022-01-11 21:11:24 +01:00
i2c-sibyte.c i2c: Use separate MODULE_AUTHOR() statements for multiple authors 2020-07-04 08:25:13 +02:00
i2c-simtec.c
i2c-sis96x.c
i2c-sis630.c
i2c-sis5595.c
i2c-sprd.c i2c: sprd: fix reference leak when pm_runtime_get_sync fails 2021-04-14 09:49:20 +02:00
i2c-st.c i2c: busses: i2c-st: Fix copy/paste function misnaming issues 2021-05-27 21:39:35 +02:00
i2c-stm32.c i2c: stm32: Simplify with dev_err_probe() 2020-09-21 11:45:43 +02:00
i2c-stm32.h
i2c-stm32f4.c i2c: busses: i2c-stm32f4: Remove incorrectly placed ' ' from function name 2021-05-27 21:39:57 +02:00
i2c-stm32f7.c Merge branch 'i2c/for-mergewindow' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2022-01-14 16:19:38 +01:00
i2c-sun6i-p2wi.c i2c: sun6i-pw2i: Prefer strscpy over strlcpy 2021-08-17 21:37:40 +02:00
i2c-synquacer.c i2c: synquacer: fix deferred probing 2021-08-17 21:41:32 +02:00
i2c-taos-evm.c
i2c-tegra-bpmp.c i2c: tegra-bpmp: Demote kernel-doc abuses 2021-06-03 22:31:42 +02:00
i2c-tegra.c i2c: tegra: Add SMBus block read function 2022-03-01 20:34:00 +01:00
i2c-thunderx-pcidrv.c drivers: i2c: thunderx: Allow driver to work with ACPI defined TWSI controllers 2022-05-21 13:41:28 +02:00
i2c-tiny-usb.c
i2c-uniphier-f.c
i2c-uniphier.c
i2c-versatile.c
i2c-via.c
i2c-viapro.c i2c: busses: Use fallthrough pseudo-keyword 2020-07-23 22:04:08 +02:00
i2c-viperboard.c
i2c-virtio.c virtio: wrap config->reset calls 2022-01-14 18:50:52 -05:00
i2c-wmt.c
i2c-xgene-slimpro.c i2c: xgene-slimpro: Fix wrong pointer passed to PTR_ERR() 2021-11-06 22:09:37 +01:00
i2c-xiic.c i2c: xiic: Correct the datatype for rx_watermark 2022-05-21 08:18:20 +02:00
i2c-xlp9xx.c i2c: Remove Netlogic XLP variant 2021-11-23 10:00:12 +01:00
Kconfig Merge tag 'irq-api-2022-02-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into i2c/for-mergewindow 2022-02-23 14:14:15 +01:00
Makefile i2c: Introduce common module to instantiate CCGx UCSI 2022-02-15 10:04:53 +01:00
scx200_acb.c i2c: busses: Use fallthrough pseudo-keyword 2020-07-23 22:04:08 +02:00