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2012-08-29i2c: tegra: Add stub runtime power managementLaxman Dewangan
Add stub runtime_pm calls which go through the flow of enabling and disabling but don't actually do anything with the device itself as there's nothing useful we can do. This provides the core PM framework with information about when the device is idle, enabling chip wide power savings. The change is based on change done by Mark Brown for s3c2410 i2c bus driver. ---------- Author: Mark Brown <broonie@opensource.wolfsonmicro.com> i2c-s3c2410: Add stub runtime power management ---------- Change-Id: Icb92129c4f79a1642b2b73d14578b05928d745a8 Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/128151
2012-08-29i2c: tegra: rename fast clock and div clockLaxman Dewangan
Rename fast clock to "fast-clk" and div clock to "div-clk" in driver and clock table to have aligned with mainline as: This is based on change: --------- commit f16e6e77a105ec53496f0d8343895da342917873 Author: Laxman Dewangan <ldewangan@nvidia.com> i2c: tegra: pass proper name for getting clock --------- Change-Id: Ie9a1972a18e2e60ac7c84c4509860cf72405ef16 Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/128150
2012-08-29i2c: tegra: remove support for I2C_M_REV_DIR_ADDRLaxman Dewangan
The Tegra i2c controller actually can not support the reverse of direction address (toggling r/w bit of address) as controller take 7 bit address from configuration and HW make it 8 bit address based on read/write flag. Hence reverting this protocol mangling support. Change-Id: I987b2be343d535c078e27b44575717a209d15584 Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/128149
2012-08-22i2c: tegra: Add delay before resetting the controller after NACKLaxman Dewangan
NACK interrupt is generated before I2C controller generates the STOP condition on bus. Because of this reset of controller is happening before I2C controller could complete STOP condition. So wait for some time before resetting the controller so that STOP condition has delivered properly on bus. Added delay of 2 clock period before resetting the controller in case of NACK error. Signed-off-by: Alok Chauhan <alokc@nvidia.com> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Taken change from mainline commit. Change-Id: Id089aae313614e58ec6da36eda4ff2d87c5cddc3 Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/125148 Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>
2012-08-21i2c: tegra: protect suspend/resume callbacks with CONFIG_PM_SLEEPLaxman Dewangan
The CONFIG_PM doesn't actually enable any of the PM callbacks, it only allows to enable CONFIG_PM_SLEEP and CONFIG_PM_RUNTIME. This means if CONFIG_PM is used to protect system sleep callbacks then it may end up unreferenced if only runtime PM is enabled. Hence protecting sleep callbacks with CONFIG_PM_SLEEP. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Change-Id: I090e167c1de8f254a278e9e3b511292cfbc5f250 Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/124872 Reviewed-by: Simone Willett <swillett@nvidia.com> Tested-by: Simone Willett <swillett@nvidia.com>
2012-08-21i2c: tegra: better describe fast and div clocksLaxman Dewangan
Describe the fast and div clock part of structure and prints better error message when any failure occurs in enabling clocks. Change-Id: I72f66b5f8cbefbe8b2c6b8c7150edff3ee2244b4 Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/124873 Reviewed-by: Simone Willett <swillett@nvidia.com> Tested-by: Simone Willett <swillett@nvidia.com>
2012-08-21i2c: tegra: declare iomap address to iomem typeLaxman Dewangan
Declare the iomap address to __iomem type. Change-Id: Ic855834f6e7fd417e4c2fd0415a6195655d3ed60 Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/124874 Reviewed-by: Simone Willett <swillett@nvidia.com> Tested-by: Simone Willett <swillett@nvidia.com>
2012-08-21i2c: tegra: I2_M_NOSTART functionality not supported in Tegra20Laxman Dewangan
Tegra20 i2c controller does not support the continue transfer which implements the I2C_M_NOSTART functionality of i2c protocol mangling. Removing the I2C_M_NOSTART functionality support for Tegra20. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Stephen Warren <swarren@nvidia.com> Cherry-picked from mainline 72dedc2fb12ff31cc2da977d0c40c3ac58f554cf Change-Id: I461342749a834ff2eae056f1c6616a8d7693a32c Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/124875 Reviewed-by: Simone Willett <swillett@nvidia.com> Tested-by: Simone Willett <swillett@nvidia.com>
2012-07-19i2c: tegra: enable/disable clock unconditionally during xferLaxman Dewangan
Do the clock control for enable/disable during each transfer regardless of whether clock is always on or not. If clock is always on then in probe the reference count of the clock incremented and doing again enable will just increment reference and disable will decrement the reference count and so there is no harm on calling enable/disable always during transfer. Change-Id: Ibf67413fb84f826f04e890fe3dd2a20cd0469922 Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/116473 Tested-by: Bandi Krishna Chaitanya <bandik@nvidia.com>
2012-07-19i2c: tegra: remove unused member variableLaxman Dewangan
Remove unused member variable "iomem" of the i2c device structure. This variable becomes unused when converted all allocation to devm_* in following change: i2c: tegra: make all resource allocation through devm_* Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cherry-picked from mainline 57c0dc3e69439a2ddf239226c318d676da773492 Change-Id: I8a3db21524a20ee4cbd1b87dff82bac80a2763de Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/116472 Reviewed-by: Automatic_Commit_Validation_User Tested-by: Bandi Krishna Chaitanya <bandik@nvidia.com>
2012-07-19i2c: tegra: i2c slave initialization for non-dvc i2cLaxman Dewangan
The slave configuration is required for non-dvc i2c. This can be done by checking the i2c type "is_dvc" in place of having another variable. Change-Id: Ia80ba0f7a68e2dfaa13b5da94896b87f2877e047 Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/116471 Tested-by: Bandi Krishna Chaitanya <bandik@nvidia.com>
2012-07-19Revert "i2c: tegra: Fix i2c unknown interrupt issue"Laxman Dewangan
This reverts commit 021d8866c80fab07cb4cd2753ed67d0c1b49c174. The reason for revert the change: The readback is done at the time of i2c_writel() and hence it is not require to have this in scattered manner. This is towards the aligning driver with mainline. Change-Id: I74184683301d7a3c26550d97fb1ce3596273a0bb Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/116470 Reviewed-by: Bitan Biswas <bbiswas@nvidia.com> Tested-by: Bandi Krishna Chaitanya <bandik@nvidia.com>
2012-07-19i2c: tegra: make sure register writes completesLaxman Dewangan
The Tegra PPSB (an peripheral bus) queues writes transactions. In order to guarantee that writes have completed before a certain time, a read transaction to a register on the same bus must be executed. This is necessary in situations such as when clearing an interrupt status or enable, so that when returning from an interrupt handler, the HW has already de-asserted its interrupt status output, which will avoid spurious interrupts. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cherry-picked from mainline ec7aaca2f64f509f45d463d784b41d0b3d2be083 Change-Id: I4f064c38993031303bfeef794015efd5517561cc Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/116469 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Bitan Biswas <bbiswas@nvidia.com> Tested-by: Bandi Krishna Chaitanya <bandik@nvidia.com>
2012-07-19i2c: tegra: make all resource allocation through devm_*Laxman Dewangan
Use the devm_* for the memory region allocation, interrupt request, clock handler request. By doing this, it does not require to explicitly free it and hence saving some code. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cherry-picked from mainline 9cbb6b2b92d0fdade0fe00cc00e3658b44c86676 Change-Id: I0bc86dbd2bd4e460c75f6d425131f9e27bdace71 Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/116468 Reviewed-by: Bitan Biswas <bbiswas@nvidia.com> Tested-by: Bandi Krishna Chaitanya <bandik@nvidia.com>
2012-07-19i2c: tegra: Add devexit_p() for removeShubhrajyoti Datta
It was originally missed in the __devinit/__devexit annotations. Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com> Acked-by: Stephen Warren <swarren@nvidia.com> Acked-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Olof Johansson <olof@lixom.net> Cherry-picked from mainline 218d06d79468ca2e6abf3679eea12d7d93d251ef Change-Id: I66db3d8b54ad6635819e5bda677bc789f9f90588 Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/116467 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Bitan Biswas <bbiswas@nvidia.com> Tested-by: Bandi Krishna Chaitanya <bandik@nvidia.com>
2012-07-19i2c: tegra: Add __devinit/exit to probe/removeStephen Warren
This fixes some section mismatch build warnings. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Olof Johansson <olof@lixom.net> This is based on mainline 92891da11a3f913b50a685c3facff6a5891a45ba Change-Id: I40547607818dbc42e5a428bfd98edcf472a7e35e Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/116466 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Bitan Biswas <bbiswas@nvidia.com> Tested-by: Bandi Krishna Chaitanya <bandik@nvidia.com>
2012-07-19i2c: tegra: rename dev_pm_ops variables/macroLaxman Dewangan
To align the downstream to mainline, renaming the variable/macro of dev_pm_ops as per mainline. The original change on mainline is: commit 6a7b3c3c465cef29d92dfc3fbbff0d958aa8be04 Author: Rafael J. Wysocki <rjw@sisk.pl> i2c-tegra: Use struct dev_pm_ops for power management Change-Id: Ica427ee339390a76ac8004bef96b4c12ef4ecae4 Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/116465 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Bitan Biswas <bbiswas@nvidia.com> Tested-by: Bandi Krishna Chaitanya <bandik@nvidia.com>
2012-07-19i2c: tegra: use of_match_ptr() for match_table initializationLaxman Dewangan
In place of defining match_table for non-DT based as NULL, use of_match_ptr() for initialzing the of_match_table. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cherry-picked from mainline 02d8bf8dc6b09cb810599c64d47da3bdf4f85882 Fixed conflicts. Change-Id: I71994c49813396ad6b3dfa3fd616d9585203adba Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/116464 Reviewed-by: Bitan Biswas <bbiswas@nvidia.com> Tested-by: Bandi Krishna Chaitanya <bandik@nvidia.com>
2012-05-30i2c: tegra: Fix possible race condition.Laxman Dewangan
on tegra3, the i2c communication start immediately after writing the tx fifo. And hence there is possibility to complete the transfer and generates done interrupt before actually sw updates their local pointers/count. This patch will make sure that pointers/count can get updated before data written into the fifo. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/89510 (cherry picked from commit 999c09f0ed32f271e767a319dd094947e63fdb8c) Change-Id: I8e974b83b5306ec3363d4ca31ce1b539a498ca08 Signed-off-by: Johnny Qiu <joqiu@nvidia.com> Reviewed-on: http://git-master/r/99997 Reviewed-by: Simone Willett <swillett@nvidia.com> Tested-by: Simone Willett <swillett@nvidia.com>
2012-05-18i2c: tegra: Fix i2c unknown interrupt issueKen Chang
writes to modules on APB bus may complete out-of-order. need to guarantee that the write is completed by reading it back. read I2C_INT_STATUS back right after writing the current int status in the isr to make sure the clear operation of I2C_INT_STATUS is done before the interrupt is re-enabled. the same also done for DVC_STATUS. bug 980763 Change-Id: I34f18804d530ccadf561fe1736552b6a4dd6e4ce Signed-off-by: Ken Chang <kenc@nvidia.com> Reviewed-on: http://git-master/r/101925 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
2012-04-18i2c: tegra: support for I2C_M_NOSTART protocol manglingLaxman Dewangan
Adding support for protocol mangling I2C_M_NOSTART. Change-Id: I6cc0c96b3c374d452ea886a0f983dc5d31c4575c Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/92573 Reviewed-by: Simone Willett <swillett@nvidia.com> Tested-by: Simone Willett <swillett@nvidia.com>
2012-04-05i2c: tegra: Support for I2C_M_REV_DIR_ADDR protocol manglingLaxman Dewangan
Add support for protocol mangling "I2C_M_REV_DIR_ADDR" Change-Id: Icdef16885f1cf6ed1ce9c4003a94c2c2e917ced2 Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/92572 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Stephen Warren <swarren@nvidia.com>
2012-04-03i2c: tegra: Fix to avoid possible race conditionChaitanya Bandi
Because of race condition between isr and tx fifo fill, duplicate data is being written. So added locking to make Tx fifo fill as atomic. Change-Id: Ia99466adadfb6d86a6f238ec4cd0aa13bd36e434 Signed-off-by: Chaitanya Bandi <bandik@nvidia.com> Reviewed-on: http://git-master/r/90870 Reviewed-by: Simone Willett <swillett@nvidia.com> Tested-by: Simone Willett <swillett@nvidia.com>
2012-04-03i2c: tegra: Avoid duplicate write into Tx fifoChaitanya Bandi
Dvc I2C_DONE_INTR_EN interrupt bit is always enable into dvc control register3. During normal transaction on dvc i2c bus sometimes one transaction written two times in TX fifo buffer because of triggered dvc interrupt. This is causing to corrupt the next transaction header and send wrong address over dvc i2c bus. To solve this issue dvc i2c interrupt has to disable during filling of Tx fifo and enable after that. Updated the following things in code: (1) Add the code to mask/unmask I2C_DONE_INTR_EN into dvc control reg3 writing into Tx Fifo register. (2) Put delay before resetting the controller Hand-picked this change from: http://git-master/r/#change,39997 Signed-off-by: Chaitanya Bandi <bandik@nvidia.com> Change-Id: I16b5821e1d0d0cf8419ce9d239e794de9d5b47be Reviewed-on: http://git-master/r/89456 Reviewed-by: Simone Willett <swillett@nvidia.com> Tested-by: Simone Willett <swillett@nvidia.com>
2012-03-30i2c: tegra: Correct 10bit address configurationLaxman Dewangan
The slave address of device to be configured in packet header as follows: 7 bit address: PacketHeader3[7:1] 10 bit address: PacketHeader3[9:0] Fixing the code to make packet header3 properly. Change-Id: I1797066d23ada5d4d7b14710201a1fb17566b78b Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/92556 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Andy Carman <acarman@nvidia.com> Reviewed-by: Stephen Warren <swarren@nvidia.com>
2012-03-23i2c: tegra: Remove synchronization between init and isrChaitanya Bandi
Removed unnecessary synchronization between init and isr because clock driver is making sure that any operations will be completed before disabling the driver clock. Change-Id: I545e48be73697e023fedb8c663402c15e2a472df Signed-off-by: Chaitanya Bandi <bandik@nvidia.com> Reviewed-on: http://git-master/r/91779 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
2012-02-22i2c: tegra: clock control for fast clockLaxman Dewangan
I2c controller requires the clock for fast clock as a second clock source. This clock should be on during normal function of i2c controller. Making sure that i2c driver get this clock and hold the clock enable during data transfer. bug 933653 Change-Id: I676eee1f8a0e1dff81b17259abcd9644bcb0b394 Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/78996 Reviewed-by: Aleksandr Frid <afrid@nvidia.com>
2012-02-21i2c: tegra: Add connection name in clk_get_sysLaxman Dewangan
Adding the connection name of clock as "i2c-div" when i2c driver calls clk_get_sys() for getting clock data pointers. Change-Id: I3e7fa79ce6d51be189f1d93cb54af0d1b3425de8 Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: http://git-master/r/84694 Reviewed-by: Aleksandr Frid <afrid@nvidia.com>
2012-02-09tegra: i2c: do not flush fifo if msg length is 0Alexandre Courbot
Bug 915417 Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Reviewed-on: http://git-master/r/74134 (cherry picked from commit 37018b3493d2d3006e38eb7a2f81cf47b111e5ea) Change-Id: I1f8bda8be92f3861fabc51c362e677497e1cb44f Signed-off-by: Pritesh Raithatha <praithatha@nvidia.com> Reviewed-on: http://git-master/r/79993 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
2012-01-30tegra: i2c: Added high speed supportAlok Chauhan
Added i2c high speed support. Bug 873879 Reviewed-on: http://git-master/r/71997 Change-Id: I5a2c5f272485e6f7c8bb6c11d7c3b6850fdcd768 Signed-off-by: Alok Chauhan <alokc@nvidia.com> Signed-off-by: Varun Wadekar <vwadekar@nvidia.com> Reviewed-on: http://git-master/r/77741 Reviewed-by: Automatic_Commit_Validation_User
2012-01-30tegra: i2c: mutex-protect access to is_suspendedAlexandre Courbot
Before making a transfer, is_suspended is checked to make sure the device is alive. However this check is done without holding the lock that the suspend and resume functions hold to change the suspend state, creating the possibility of a race condition. Bug 916336 Reviewed-on: http://git-master/r/70488 Change-Id: I7b4e52f686b0b372f3fc8ba7c7a4e4fdcdb6ba10 Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Varun Wadekar <vwadekar@nvidia.com> Reviewed-on: http://git-master/r/77740 Reviewed-by: Automatic_Commit_Validation_User
2012-01-04i2c: tegra:don't overwrite arb_recovery function pointerLinqiang Pu
put busses array as last struct member to avoid overwritting arb_recovery function pointer. Bug:889581 Reviewed-on: http://git-master/r/58347 (cherry picked from commit 223b2794fb0d3e94ccfb28549b74941a492415dd) Change-Id: I4e8792a0cb42255724c8e45baea4f273181a8e2f Signed-off-by: Linqiang Pu <dpu@nvidia.com> Reviewed-on: http://git-master/r/58942 Reviewed-by: Simone Willett <swillett@nvidia.com> Tested-by: Simone Willett <swillett@nvidia.com>
2011-12-26Revert "i2c: tegra: use PM runtime framework"Varun Wadekar
This reverts commit fc56d07f59a3cafa33c31bf90a50af04a0235cf8.
2011-12-23i2c: tegra: use PM runtime frameworkPeter De Schrijver
Convert tegra i2c driver to use PM runtime framework. changes since last version: fix hang when using resume_noirq Change-Id: I1cce314ef4c06dbc7f1b3ddbdd1ad50255aa8b02 Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com> Reviewed-on: http://git-master/r/71192 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Varun Wadekar <vwadekar@nvidia.com>
2011-11-30HACK merge fixups for compileDan Willemsen
Rebase-Id: Rbc628711479b187a90437bea94776066c7a58b54
2011-11-30i2c: tegra: Updated Arbitration lost recoveryAlok Chauhan
Updated arbitration lost recovery to accumulate i2c multiplexing. bug 854305 Original-Change-Id: I3f669c507980df78fa443c84b304d337bbe6a6da Reviewed-on: http://git-master/r/46630 Reviewed-by: Alok Chauhan <alokc@nvidia.com> Reviewed-by: Bandi Krishna Chaitanya <bandik@nvidia.com> Tested-by: Bandi Krishna Chaitanya <bandik@nvidia.com> Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com> Rebase-Id: R987d84dcf51a3d8e366f2e4b2d0d278304e2db76
2011-11-30i2c: tegra: Added arbitration lost error recoveryAlok Chauhan
Added the arbitration lost error recovery code into i2c driver. bug 854305 Original-Change-Id: Ib855f3541d139c01ea34fd9070feef7969eed395 Reviewed-on: http://git-master/r/43201 Reviewed-by: Bandi Krishna Chaitanya <bandik@nvidia.com> Tested-by: Bandi Krishna Chaitanya <bandik@nvidia.com> Reviewed-by: Alok Chauhan <alokc@nvidia.com> Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com> Rebase-Id: R7cda6214579416b3b0a4eafe412a18293260e669
2011-11-30Revert "i2c: tegra: Remove the synchronization between isr and caller"Alok Chauhan
This reverts commit 738c1a66079ee7db8e4365aa85819ccdef2592a8. This fixed the video recording system hang bug Bug 842901 Reviewed-on: http://git-master/r/39912 Rebase-Id: R183a5a9202ec65099503ddad913a25b139bd6d91
2011-11-30i2c: tegra: Remove the synchronization between isr and callerAlok Chauhan
Remove the handling of synchronisation between isr and caller. This change has become obsolete because now clock driver will make sure that any write operations will be completed before disabling the driver clock. Original-Change-Id: I95957351fd1f291a59182fddbb619ffd02a0db63 Reviewed-on: http://git-master/r/33099 Reviewed-by: Bo Yan <byan@nvidia.com> Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com> Tested-by: Alok Chauhan <alokc@nvidia.com> Rebase-Id: Rec9671e9283870630fda6ceb977b99b92c3a99a9
2011-11-30i2c: tegra: Making proper synchronization between isr and callerAlok Chauhan
Following are the changes: - Added a mechanism to handle synchronization between caller thread and isr so that isr should not get called when clock is disable or controller is in reset state. - Handling tx fifo overflow error. - Added delay before resetting the controller which is required if there is any error in previous transaction so proper stop signal will be generated. Original-Change-Id: I7ac121e056193cd4601f032cdabab59e7e0946ea Reviewed-on: http://git-master/r/30457 Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Alok Chauhan <alokc@nvidia.com> Tested-by: Alok Chauhan <alokc@nvidia.com> Tested-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Danielle Sun <dsun@nvidia.com> Tested-by: Danielle Sun <dsun@nvidia.com> Reviewed-by: Bo Yan <byan@nvidia.com> Reviewed-by: Scott Williams <scwilliams@nvidia.com> Rebase-Id: R0e7b428de2b0b1567a23bcac3c53aa5cc9d8d4a9
2011-11-30i2c: tegra: Add more debug message in failure caseLaxman Dewangan
Added some more debug message to print during i2c transfer failure to get more information from log. This help to understand/analyse the issue quickly. Original-Change-Id: Ie957b9f2ad737da210722f2ea6f18da9a7b76813 Reviewed-on: http://git-master/r/30011 Reviewed-by: Varun Colbert <vcolbert@nvidia.com> Tested-by: Varun Colbert <vcolbert@nvidia.com> Rebase-Id: Rc40314cf7d257db51d98fba2dc94c8398fb2b8a9
2011-11-30i2c: clock: tegra: Removing unnecessary clock entryLaxman Dewangan
The clock table have two different entry for a given i2c controller. The second entry is not required and hence removing from table. Also removing the reference of this entry from driver. Original-Change-Id: Iab5f79bf5d1fea9363ef524258fb3ec262547691 Reviewed-on: http://git-master/r/29629 Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com> Tested-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Scott Williams <scwilliams@nvidia.com> Reviewed-by: Daniel Willemsen <dwillemsen@nvidia.com> Reviewed-by: Aleksandr Frid <afrid@nvidia.com> Reviewed-by: Narendra Damahe <ndamahe@nvidia.com> Rebase-Id: R0265f605ec00f464eb9ec8d5ffe840a642592fab
2011-11-30Update copyrightsScott Williams
Original-Change-Id: I2ffeaf6f8dfeb279b40ca6f69f6c9157401a746a Rebase-Id: R84f13e4b66ba9711fcb92850fd5e800ef3248a3f
2011-11-30i2c: tegra: suppporting clock enable always through platform data.Laxman Dewangan
To make the response fast from i2c, providing the option to enable clock of i2c always through platform data. Original-Change-Id: I89c9156fc97f92a45ce72626ccd77920e02ca356 Reviewed-on: http://git-master/r/19880 Tested-by: Pradeep Goudagunta <pgoudagunta@nvidia.com> Reviewed-by: Ramachandrudu Kandhala <rkandhala@nvidia.com> Original-Change-Id: Ifaab9d7e052fb377abe27afdeb5c9cb4d19a6320 Rebase-Id: R15e2cfa9080024d9e2bbc8d966f5145766ee9e1a
2011-11-30[ARM] tegra i2c: Removing unnecessarily write on INT_STATUSAlok Chauhan
Removing the unnecessarily write in the interrupt status register to avoid controller status misbehave. bug 773262 Original-Change-Id: I15e2f3d5b377f44df5aae0fce9b55b2f3e7232b9 Reviewed-on: http://git-master/r/14223 Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com> Tested-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Alok Chauhan <alokc@nvidia.com> Tested-by: Alok Chauhan <alokc@nvidia.com> Reviewed-by: Scott Williams <scwilliams@nvidia.com> Original-Change-Id: I17d9b90b91d54248bb23f7426faececd856403ea Rebase-Id: R604a43169dbe3363cb9cb6d11c381aeeb502ea01
2011-11-30i2c: buses: tegra: assign unused address to i2c slaveNitin Kumbhar
New i2c slave should be configured with a non-zero i2c address. Configure i2c slave with an i2c address assigned by platform data for an i2c dev. BUG 788286 Reviewed-on: http://git-master/r/25100 (cherry picked from commit e6e0610c72ffce3b734e079faf88fad3f0468d07) Original-Change-Id: I440aa2cc72007d2835b2027c0b26089d0aad9263 Reviewed-on: http://git-master/r/25223 Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com> Tested-by: Bharat Nihalani <bnihalani@nvidia.com> Rebase-Id: Rfac0b98a3aad6f7df4badd5554a63856212a580d
2011-11-30i2c: buses: tegra: use new cam_i2c slave controllerNitin Kumbhar
Use new cam_i2c slave (i2c2) instead of the legacy one. With old i2c slave controller, occasionally it generates spurious slave interrupts causing disruptions in i2c transfers. BUG 790315 Reviewed-on: http://git-master/r/24287 (cherry picked from commit 001805e9036b647e9a1220f2b50e8973ec28e917) Original-Change-Id: Icd5310286de0338a4458c26a8d491bcded032b03 Reviewed-on: http://git-master/r/24294 Tested-by: Nitin Kumbhar <nkumbhar@nvidia.com> Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com> Rebase-Id: R547c7338528aacebfb6b5258449dba31897552fc
2011-11-30i2c: buses: tegra: use new i2c slave controllerNitin Kumbhar
tegra2 has an improved new i2c slave controller. This should be used instead of the old i2c slave controller. With old i2c slave controller, occasionally it generates spurious slave interrupts causing disruptions in master i2c transfers. BUG 788286 BUG 804545 Reviewed-on: http://git-master/r/24107 (cherry picked from commit 64a6e1d5a555be1c330de80cfb477563ae061452) Original-Change-Id: Id5d5bd809df4a583a743d84a91aecbb78889a3c6 Reviewed-on: http://git-master/r/24246 Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com> Tested-by: Bharat Nihalani <bnihalani@nvidia.com> Rebase-Id: Re4b74bb7df316c939cb619da87d2f6fd1ccb35dc
2011-11-30i2c-tegra: Using suspend_noirq()/resume_noirq() for suspend/resume.Jubeom Kim
I2C driver needs to be suspended late and resumed early than other drivers. So, I2C driver uses the suspend_noirq/resume_noirq callbacks of struct dev_pm_ops for early/late power management system. Original-Change-Id: Ie2f453b96fb9ab9b16cafec79644fe5d3b982dd3 Reviewed-on: http://git-master/r/23347 Tested-by: Jubeom Kim <jubeomk@nvidia.com> Reviewed-by: Jinyoung Park <jinyoungp@nvidia.com> Reviewed-by: Varun Wadekar <vwadekar@nvidia.com> Reviewed-by: Mayuresh Kulkarni <mkulkarni@nvidia.com> Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com> Rebase-Id: R1126fb1683ac4f9138763e7981a0e36769f14738
2011-11-30i2c-tegra: Retry transfer when unexpected status is detectedJin Park
Sometimes unexpected status like I2C busy status, Tx FIFO interrupted and wait on Rx data etc is seen. Add a code to detect such conditions and return -EAGAIN from driver. This will cause the i2c-core to retry the transmission as per the retry count and time-out specified by the platform data of the adapter. Bug ID: 777455 Original-Change-Id: Iac5971bca4d760d93cd2ed147f78fc2807315b4e Signed-off-by: Jin Park <jinyoungp@nvidia.com> Reviewed-on: http://git-master/r/16212 Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com> Rebase-Id: R7c56bb575b1e7be19d1916124cdd86618c2f9c42
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-26 21:04:29 +0000