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054b62d9f2
linux/drivers/i2c/busses
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Fugang Duan 054b62d9f2 i2c: imx: fix the i2c bus hang issue when do repeat restart 
Test i2c device Maxim max44009, datasheet is located at:
http://www.maximintegrated.com/datasheet/index.mvp/id/7175

The max44009 support repeat operation like:
read -> repeat restart -> read/write

The current i2c imx host controller driver don't support this
operation that causes i2c bus hang due to "MTX" is cleared in
.i2c_imx_read(). If "read" is the last message there have no problem,
so the current driver supports all SMbus operation like:
write -> repeat restart -> read/write

IMX i2c controller for master receiver has some limitation:
- If it is the last byte for one operation, it must generate STOP
  signal before read I2DR to prevent controller from generating another
  clock cycle.
- If it is the last byte in the read, and then do repeat restart, it must
  set "MTX" before read I2DR to prevent controller from generating another
  extra clock cycle.

The patch is to fix the issue.

Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02 19:18:18 +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 i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
i2c-ali1535.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
i2c-ali1563.c i2c: ali1563: fix checkpatch.pl issues 2014-05-22 10:09:21 +02:00
i2c-amd756-s4882.c Update Jean Delvare's e-mail address 2014-01-29 20:40:08 +01:00
i2c-amd756.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +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: Add device tree property to set clock-frequency 2014-03-12 08:26:04 +01:00
i2c-au1550.c i2c: delete non-required instances of include <linux/init.h> 2014-01-24 18:24:31 +01:00
i2c-bcm2835.c i2c: i2c-bcm2835: deprecate class based instantiation 2014-03-28 08:53:18 +01:00
i2c-bcm-kona.c i2c: i2c-bcm-kona: Fix module build 2013-11-26 14:00:57 +01:00
i2c-bfin-twi.c i2c: bfin-twi: remove unnecessary Blackfin SSYNC from the driver 2014-03-09 08:41:18 +01:00
i2c-cadence.c i2c: Add driver for Cadence I2C controller 2014-04-06 17:47:19 +02:00
i2c-cbus-gpio.c i2c: delete non-required instances of include <linux/init.h> 2014-01-24 18:24:31 +01:00
i2c-cpm.c i2c: cpm: Fix build by adding of_address.h and of_irq.h 2014-03-24 14:54:21 +01:00
i2c-davinci.c i2c: i2c-davinci: deprecate class based instantiation 2014-03-28 08:53:43 +01:00
i2c-designware-core.c i2c: designware: Mask all interrupts during i2c controller enable 2014-05-14 18:14:20 +02:00
i2c-designware-core.h i2c: designware: make SCL and SDA falling time configurable 2014-03-09 09:29:08 +01:00
i2c-designware-pcidrv.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
i2c-designware-platdrv.c i2c: i2c-designware-platdrv: deprecate class based instantiation 2014-03-28 08:54:00 +01:00
i2c-diolan-u2c.c i2c: i2c-diolan-u2c: different usb endpoints for DLN-2-U2C 2013-11-26 13:49:33 +01:00
i2c-efm32.c i2c: efm32: new bus driver 2014-03-27 18:53:16 +01:00
i2c-eg20t.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
i2c-elektor.c i2c: remove __dev* attributes from subsystem 2012-12-22 20:13:45 +01:00
i2c-exynos5.c i2c: exynos5: add support for HSI2C on Exynos5260 SoC 2014-05-22 10:09:22 +02:00
i2c-gpio.c i2c: gpio: Use devm_gpio_request() 2014-05-22 10:09:25 +02:00
i2c-highlander.c i2c: delete non-required instances of include <linux/init.h> 2014-01-24 18:24:31 +01:00
i2c-hydra.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
i2c-i801.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
i2c-ibm_iic.c i2c: delete non-required instances of include <linux/init.h> 2014-01-24 18:24:31 +01:00
i2c-ibm_iic.h
i2c-imx.c i2c: imx: fix the i2c bus hang issue when do repeat restart 2014-06-02 19:18:18 +02:00
i2c-iop3xx.c i2c: delete non-required instances of include <linux/init.h> 2014-01-24 18:24:31 +01:00
i2c-iop3xx.h i2c-iop3xx: add iomem annotation 2011-01-04 00:53:37 +00:00
i2c-isch.c i2c: delete non-required instances of include <linux/init.h> 2014-01-24 18:24:31 +01:00
i2c-ismt.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
i2c-kempld.c i2c: Fix Kontron PLD prescaler calculation 2013-08-05 10:31:18 +02:00
i2c-mpc.c i2c: delete non-required instances of include <linux/init.h> 2014-01-24 18:24:31 +01:00
i2c-mv64xxx.c i2c: mv64xxx: Change i2c compatibles for sunxi 2014-05-22 10:09:21 +02:00
i2c-mxs.c i2c: mxs: Use devm_ioremap_resource() 2014-03-10 08:29:37 +01:00
i2c-nforce2-s4985.c Update Jean Delvare's e-mail address 2014-01-29 20:40:08 +01:00
i2c-nforce2.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
i2c-nomadik.c i2c: nomadik: Fixup system suspend 2014-05-22 10:09:21 +02:00
i2c-nuc900.c i2c: use dev_get_platdata() 2013-08-19 19:46:30 +02:00
i2c-ocores.c i2c: i2c-ocores: deprecate class based instantiation 2014-03-05 17:17:06 +01:00
i2c-octeon.c i2c: delete non-required instances of include <linux/init.h> 2014-01-24 18:24:31 +01:00
i2c-omap.c i2c: omap: fix usage of IS_ERR_VALUE with pm_runtime_get_sync 2014-03-27 18:53:26 +01:00
i2c-parport-light.c Update Jean Delvare's e-mail address 2014-01-29 20:40:08 +01:00
i2c-parport.c Update Jean Delvare's e-mail address 2014-01-29 20:40:08 +01:00
i2c-parport.h Update Jean Delvare's e-mail address 2014-01-29 20:40:08 +01:00
i2c-pasemi.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
i2c-pca-isa.c i2c: remove __dev* attributes from subsystem 2012-12-22 20:13:45 +01:00
i2c-pca-platform.c i2c: delete non-required instances of include <linux/init.h> 2014-01-24 18:24:31 +01:00
i2c-piix4.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
i2c-pmcmsp.c i2c: delete non-required instances of include <linux/init.h> 2014-01-24 18:24:31 +01:00
i2c-pnx.c i2c: pnx: Use devm_*() functions 2014-01-16 11:15:50 +01:00
i2c-powermac.c i2c: delete non-required instances of include <linux/init.h> 2014-01-24 18:24:31 +01:00
i2c-puv3.c i2c: delete non-required instances of include <linux/init.h> 2014-01-24 18:24:31 +01:00
i2c-pxa-pci.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
i2c-pxa.c i2c: move OF helpers into the core 2013-08-23 10:22:20 +02:00
i2c-qup.c i2c: qup: Fix pm_runtime_get_sync usage 2014-05-14 18:14:49 +02:00
i2c-rcar.c i2c: rcar: update copyright and license information 2014-06-01 22:23:00 +02:00
i2c-riic.c i2c: riic: add driver 2014-01-02 15:56:52 +01:00
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 i2c: s3c2410: resume race fix 2014-05-14 18:14:43 +02:00
i2c-s6000.c i2c: use dev_get_platdata() 2013-08-19 19:46:30 +02:00
i2c-s6000.h i2c: Change mail address of Oskar Schirmer 2012-05-17 15:15:56 +02:00
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: delete non-required instances of include <linux/init.h> 2014-01-24 18:24:31 +01:00
i2c-sh_mobile.c i2c: sh_mobile: add compatibles for additional SoC 2014-06-01 22:22:08 +02:00
i2c-sibyte.c i2c/mips: Fix error return codes from Sibyte i2c bus driver 2010-07-10 09:42:47 +02:00
i2c-simtec.c i2c: delete non-required instances of include <linux/init.h> 2014-01-24 18:24:31 +01:00
i2c-sirf.c i2c: i2c-sirf: deprecate class based instantiation 2014-03-28 08:54:45 +01:00
i2c-sis96x.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
i2c-sis630.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
i2c-sis5595.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
i2c-st.c i2c: st: Fix return in case of arbitration lost 2014-03-10 17:35:08 +01:00
i2c-stu300.c i2c: i2c-stu300: deprecate class based instantiation 2014-03-05 17:17:09 +01:00
i2c-taos-evm.c Update Jean Delvare's e-mail address 2014-01-29 20:40:08 +01:00
i2c-tegra.c i2c: i2c-tegra: deprecate class based instantiation 2014-03-05 17:17:12 +01:00
i2c-tiny-usb.c i2c: i2c-tiny-usb: Remove RobotFuzz USB vendor:product ID 2014-01-13 13:56:52 +01:00
i2c-versatile.c i2c: move OF helpers into the core 2013-08-23 10:22:20 +02:00
i2c-via.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
i2c-viapro.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
i2c-viperboard.c i2c: viperboard: remove superfluous assignment 2014-01-09 22:18:33 +01:00
i2c-wmt.c Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2013-11-18 15:50:07 -08:00
i2c-xiic.c i2c: i2c-xiic: deprecate class based instantiation 2014-03-28 08:55:04 +01:00
i2c-xlr.c i2c: delete non-required instances of include <linux/init.h> 2014-01-24 18:24:31 +01:00
Kconfig i2c: eg20t: Fix Kconfig dependencies 2014-05-22 10:09:25 +02:00
Makefile i2c: Add driver for Cadence I2C controller 2014-04-06 17:47:19 +02:00
scx200_acb.c i2c: remove DEFINE_PCI_DEVICE_TABLE macro 2014-03-13 09:44:59 +01:00
scx200_i2c.c i2c: delete non-required instances of include <linux/init.h> 2014-01-24 18:24:31 +01:00