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2016-09-21i2c-eg20t: fix race between i2c init and interrupt enableYadi.hu
the eg20t driver call request_irq() function before the pch_base_address, base address of i2c controller's register, is assigned an effective value. there is one possible scenario that an interrupt which isn't inside eg20t arrives immediately after request_irq() is executed when i2c controller shares an interrupt number with others. since the interrupt handler pch_i2c_handler() has already active as shared action, it will be called and read its own register to determine if this interrupt is from itself. At that moment, since base address of i2c registers is not remapped in kernel space yet,so the INT handler will access an illegal address and then a error occurs. Signed-off-by: Yadi.hu <yadi.hu@windriver.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Cc: stable@kernel.org
2016-09-16i2c: rcar: add support for r8a7796 (R-Car M3-W)Ulrich Hecht
Same as r8a7795. Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-09-15i2c: imx: make bus recovery through pinctrl optionalYang Li
Since commit 1c4b6c3bcf30 ("i2c: imx: implement bus recovery") the driver starts to use gpio/pinctrl to support optional bus recovery feature. But pinctrl is not always usable. There are platforms such as ls1021a and ls1043a that don't support pinctrl, and it could just be broken due to old/broken device tree. The patch makes it really optional that the probe function won't bailout on pinctrl problems instead it just disables bus recovery and prints out notification when there is problem with pinctrl. Since pinctrl is only used by bus recovery in this driver, move pinctrl initialization into bus recovery init function to prevent confusion. Signed-off-by: Li Yang <leoyang.li@nxp.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-09-15i2c: meson: add gxbb compatible stringNeil Armstrong
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Acked-by: Kevin Hilman <khilman@baylibre.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-09-08i2c: rk3x: Restore clock settings at resume timeDoug Anderson
Depending on a number of factors including: - Which exact Rockchip SoC we're working with - How deep we suspend - Which i2c port we're on We might lose the state of the i2c registers at suspend time. Specifically we've found that on rk3399 the i2c ports that are not in the PMU power domain lose their state with the current suspend depth configured by ARM Tursted Firmware. Note that there are very few actual i2c registers that aren't configured per transfer anyway so all we actually need to re-configure are the clock config registers. We'll just add a call to rk3x_i2c_adapt_div() at resume time and be done with it. NOTE: On rk3399 on ports whose power was lost, I put printouts in at resume time. I saw things like: before: con=0x00010300, div=0x00060006 after: con=0x00010200, div=0x00180025 Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: David Wu <david.wu@rock-chips.com> Tested-by: David Wu <david.wu@rock-chips.com> [wsa: removed duplicate const] Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-09-08i2c: uniphier-f: set the adapter to master mode when probingMasahiro Yamada
Currently, the adapter is set to the master mode at the first use. Since then, it is kept in the slave mode, so unexpected glitch signals on the I2C lines may cause the adapter into insane state. Setting it to the master mode along with initialization solves the problem. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reported-by: Akio Noda <noda.akio@socionext.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-09-08i2c: uniphier-f: avoid WARN_ON() of clk_disable() in failure pathMasahiro Yamada
If clk_prepare_enable() fails, clk_disable_unprepare() is called in the failure path, where the enable_count is still zero, so it hits WARN_ON(core->enable_count == 0) in the clk_core_disable(). To fix this, make the clock setting more linear in the probe function so that it can exploit "goto err" in case of error. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-09-08i2c: uniphier: avoid WARN_ON() of clk_disable() in failure pathMasahiro Yamada
If clk_prepare_enable() fails, clk_disable_unprepare() is called in the failure path, where the enable_count is still zero, so it hits WARN_ON(core->enable_count == 0) in the clk_core_disable(). To fix this, make the clock setting more linear in the probe function so that it can exploit "goto err" in case of error. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-09-08i2c: tegra: Fix assignment of boolean variablesJon Hunter
Fix the following warnings reported by coccinelle for the Tegra I2C driver. drivers/i2c/busses/i2c-tegra.c:513:2-23: WARNING: Assignment of bool to 0/1 drivers/i2c/busses/i2c-tegra.c:539:3-24: WARNING: Assignment of bool to 0/1 Reported-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-09-08i2c: tegra: proper handling of error casesShardar Shariff Md
To summarize the issue observed in error cases: SW Flow: For i2c message transfer, packet header and data payload is posted and then required error/packet completion interrupts are enabled later. HW flow: HW process the packet just after packet header is posted, if ARB lost/NACK error occurs (SW will not handle immediately when error happens as error interrupts are not enabled at this point). HW assumes error is acknowledged and clears current data in FIFO, But SW here posts the remaining data payload which still stays in FIFO as stale data (data without packet header). Now once the interrupts are enabled, SW handles ARB lost/NACK error by clearing the ARB lost/NACK interrupt. Now HW assumes that SW attended the error and will parse/process stale data (data without packet header) present in FIFO which causes invalid NACK errors. Fix: Enable the error interrupts before posting the packet into FIFO which make sure HW to not clear the fifo. Also disable the packet mode before acknowledging errors (ARB lost/NACK error) to not process any stale data. As error interrupts are enabled before posting the packet header use spinlock to avoid preempting. Signed-off-by: Shardar Shariff Md <smohammed@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-09-08i2c: tegra: use atomic poll function during configurationShardar Shariff Md
Use readl_poll_timeout_atomic() function as *wait_for_config_load() function can be called from interrupt context. Signed-off-by: Shardar Shariff Md <smohammed@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-09-08i2c: tegra: add separate function for config_load programingShardar Shariff Md
Define separate function for configuration load register handling to make it use by different functions later. Signed-off-by: Shardar Shariff Md <smohammed@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-09-08i2c: tegra: If fifo flush fails return errorShardar Shariff Md
During i2c controller initialization, when fifo flush fails return error instead of returning the error during exit. Signed-off-by: Shardar Shariff Md <smohammed@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-09-08i2c: tegra: use readl_poll_timeout after config_load reg programmedShardar Shariff Md
After CONFIG_LOAD register is programmed instead of explicitly waiting for timeout, use readl_poll_timeout() to check for register value to get updated or wait till timeout. Signed-off-by: Shardar Shariff Md <smohammed@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-09-08i2c: shmobile: Use ARCH_SHMOBILE instead of SUPERHGeert Uytterhoeven
"i2c-sh_mobile" is used on sh7343, sh7366, sh7722, sh7723, and sh7724 only. As all of the above select ARCH_SHMOBILE, restrict its driver dependencies from SUPERH to ARCH_SHMOBILE. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-09-08i2c: Spelling s/acknowedge/acknowledge/Geert Uytterhoeven
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-09-08i2c: designware: save the preset value of DW_IC_SDA_HOLDZhuo-hao Lee
There are several ways to set the SDA hold time for i2c controller, including: Device Tree, built-in device properties and ACPI. However, if the SDA hold time is not specified by above method, we should read the value, where it is preset by firmware, and save it to sda_hold_time. This is needed because when i2c controller enters runtime suspend, the DW_IC_SDA_HOLD value will be reset to chipset default value. And during runtime resume, i2c_dw_init will be called to reconfigure i2c controller. If sda_hold_time is zero, the chipset default hold time will be used, that will be too short for some platforms. Therefore, to have a better tolerance, the DW_IC_SDA_HOLD value should be kept by sda_hold_time. Signed-off-by: Zhuo-hao Lee <zhuo-hao.lee@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-09-08i2c: mux: demux-pinctrl: run properly with multiple instancesWolfram Sang
We can't use a static property for all the changesets, so we now create dynamic ones for each changeset. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Fixes: 50a5ba87690814 ("i2c: mux: demux-pinctrl: add driver") Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-30i2c: core: put literals on one line in dev_*() callsAndy Shevchenko
It's better to have strings in the code like they appeared in the output. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-30i2c: move locking operations to their own structPeter Rosin
This makes it trivial to constify them, so do that. Signed-off-by: Peter Rosin <peda@axentia.se> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-30i2c: tegra: Add pinctrl supportJon Hunter
On Tegra124/132 the pins for I2C6 are shared with the Display Port AUX (DPAUX) channel and on Tegra210 the pins for I2C4 and I2C6 are shared with DPAUX1 and DPAUX0, respectively. The multiplexing of the pins is handled by a register in the DPAUX and so the Tegra DPAUX driver has been updated to register a pinctrl device for managing these pins. The pins for these particular I2C devices are bound to the I2C device prior to probing. However, these I2C devices are in a different power partition to the DPAUX devices that own the pins. Hence, it is desirable to place the pins in the 'idle' state and allow the DPAUX power partition to switch off, when these I2C devices is not in use. Therefore, add calls to place the I2C pins in the 'default' and 'idle' states when the I2C device is runtime resumed and suspended, respectively. Please note that the pinctrl functions that set the state of the pins check to see if the devices has pins associated and will return zero if they do not. Therefore, it is safe to call these pinctrl functions even for I2C devices that do not have any pins associated. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Acked-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-30i2c: tegra: Add runtime power-management supportJon Hunter
Update the Tegra I2C driver to use runtime PM and move the code in the tegra_i2c_clock_enable/disable() functions to the PM runtime resume and suspend callbacks, respectively. Note that given that CONFIG_PM is not mandatory for Tegra, if CONFIG_PM is not enabled and so runtime PM is not enabled, ensure that the I2C clocks are turned on during probe and kept on by calling the resume callback directly. In the function tegra_i2c_init(), the variable 'err' does not need to be initialised to zero in tegra_i2c_init() because it is initialised when pm_runtime_get_sync() is called. Furthermore, to ensure we only return 0 from tegra_i2c_init(), it is necessary to re-initialise 'err' to 0 after a successful call to pm_runtime_get_sync() because it can return a positive value on success. However, alternatively re-initialise 'err' by using the return value of the function tegra_i2c_flush_fifos() because it can only be 0 or -ETIMEDOUT. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Acked-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-30i2c: tegra: Simplify I2C resumeJon Hunter
The I2C adapter is unlocked regardless of whether the tegra_i2c_init() called during the resume is successful or not. However, if the tegra_i2c_init() is not successful, then ->is_suspended is not set to false. Simplify the resume code by only setting ->is_suspended to false if tegra_i2c_init() is successful and return the error code from tegra_i2c_init(). Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Acked-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-30i2c: tegra: Use device name for adapter nameJon Hunter
All Tegra I2C devices have the name "Tegra I2C adapter" which is not very useful when viewing the I2C adapter names via the sysfs. Therefore, use the device name, which is unique for each I2C device, instead. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Acked-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-30i2c: tegra: Remove non device-tree supportJon Hunter
Tegra has only supported device-tree for platform/board configuration for quite some time now and so simplify the Tegra I2C driver by dropping code for non device-tree platforms/boards. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-30i2c: tegra: Add missing new line charactersJon Hunter
Add missing new line characters for the various error messages. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Acked-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-30i2c: tegra: Fix missing blank lines after declarationsJon Hunter
Checkpatch warns about missing blank lines after declarations in the Tegra I2C driver and so fix these. Note that the initialisation of 'val' to zero in tegra_dvc_init() is unnecessary and so remove this. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-30i2c: tegra: Use BIT macroJon Hunter
Checkpatch warns about spacing around the '<<' operator in the Tegra I2C driver and so fix these by converting the bit definitions that are using this operator to use the BIT macro. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-30i2c: tegra: Fix lines over 80 charactersJon Hunter
Checkpatch warns about some lines over 80 characters in the Tegra I2C driver and so fix these. While we are at it, prefix the second instance of "STOP condition" in the comment with a "the". Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26Merge branch 'i2c-mux-dt-3' of https://github.com/peda-r/i2c-mux into ↵Wolfram Sang
i2c/for-4.9 Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26i2c: designware: do not disable adapter after transferLucas De Marchi
Disabling the adapter after each transfer adds additional delays for each I2C transfer. Even if we don't wait for it to be disabled anymore, on next transfer we will need to if we have several transfers in a row. Now during the transfer init we check if IC_TAR can be changed dynamically, the status register for no activity and TX buffer being empty. In this case we don't need to disable it When a transfer fails the adapter will still be disabled - this is a conservative approach. When transfers succeed, the adapter is left enabled and it's configured so to disable interrupts. Alternating register reads on 2 slaves: perf stat -r4 chrt -f 10 ./i2c-test /dev/i2c-1 25000 0x40 0x6 0x1e 0x00 Before: 8.638705161 seconds time elapsed ( +- 5.90% ) After: 7.516821591 seconds time elapsed ( +- 0.11% ) Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com> Signed-off-by: José Roberto de Souza <jose.souza@intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Tested-by: Christian Ruppert <christian.ruppert@alitech.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26i2c: designware: detect when dynamic tar update is possibleLucas De Marchi
This adapter can be synthesized with dynamic tar update enabled or disabled. When enabled it is not necessary to disable the adapter to change the slave address in some situations, which saves some time per transaction. There is no direct register to know if this feature is enabled but we can do it indirectly by writing to the 10BIT_ADDR field in IC_CON: this field is read only when dynamic tar update is enabled. Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com> Signed-off-by: José Roberto de Souza <jose.souza@intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Tested-by: Christian Ruppert <christian.ruppert@alitech.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26i2c: designware: add common functions for lockingLucas De Marchi
These are used in 2 places and will be needed in more. Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Tested-by: Christian Ruppert <christian.ruppert@alitech.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26i2c: designware: wait for disable/enable only if necessaryJosé Roberto de Souza
If we aren't going to continue using the controller we can just disable it instead of waiting for it to complete. The biggest improvement here is when a I2C transaction is completed and it doesn't block until the adapter is disabled. When a new transfer is needed we will disable and wait for its completion. This way the adapter will continue changing its state in parallel to the execution of the thread that requested the I2C transaction saving most of the time 25~250 usec per I2C transaction. A simple program doing a register read (1 byte write, 1 byte read) alternating on 2 different slaves repeated 25k times for each and measurements taken 4 times we get: perf stat -r4 chrt -f 10 ./i2c-test /dev/i2c-1 25000 0x40 0x6 0x1e 0x00 Before: 30.879317977 seconds time elapsed ( +- 14.83% ) After: 8.638705161 seconds time elapsed ( +- 5.90% ) Signed-off-by: José Roberto de Souza <jose.souza@intel.com> Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Tested-by: Christian Ruppert <christian.ruppert@alitech.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26i2c: designware: Find bus speed from ACPIJarkko Nikula
Fast mode is the default speed of i2c-designware which can be overridden by platform data or by "clock-frequency" device property. Even though the ACPI 5.1 can pass device properties via _DSD method, shipping systems define the connection speed between I2C host and each slave in their I2cSerialBus resources. Which means speed is not defined per bus but per slave. As there is now support in i2c-core to find the bus speed from ACPI use that to set up the bus speed prior registering the I2C adapter. Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26i2c: core: Add function for finding the bus speed from ACPI, take 2Jarkko Nikula
ACPI 5 specification doesn't have property for the I2C bus speed but I2cSerialBus resource descriptor which define each controller-slave connection define the maximum speed supported by that connection. Thus finding the maximum safe speed for the bus is to walk through all I2cSerialBus resources that are associated to I2C controller and use the speed of slowest connection. Add function i2c_acpi_find_bus_speed() to the i2c-core that adapter drivers can call prior registering itself to core. This implies two-step walk through the I2cSerialBus resources: call to i2c_acpi_find_bus_speed() does the first scan and finds the safe bus speed that adapter drivers can set up. Adapter driver registration does the second scan when i2c-core creates the I2C slaves by calling the i2c_acpi_register_devices(). In that way the bus speed is set in case slave device probe gets called during registration and does communication. Previous version commit 55d38d060e99 ("i2c: core: Add function for finding the bus speed from ACPI") got reverted due merge conflicts from commit 525e6fabeae2 ("i2c / ACPI: add support for ACPI reconfigure notifications"). This version is a bit bigger than previous version but is still sharing the lowest and complicated part of I2cSerialBus lookup routines with the existing code. Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26i2c: core: Cleanup I2C ACPI namespace, take 2Jarkko Nikula
I2C ACPI enumeration was originally implemented in another module under drivers/acpi/ but was later moved into i2c-core with added support for I2C ACPI operation region. Rename these acpi_i2c_ prefixed functions, structures and defines in i2c-core to i2c_acpi_ in order to have more consistent name space. This is updated version from commit a7003b65801e ("i2c: core: Cleanup I2C ACPI namespace") that got reverted due merge conflicts from commit 525e6fabeae2 ("i2c / ACPI: add support for ACPI reconfigure notifications"). Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26i2c: designware: Enable high speed modeWeifeng Voon
This patch enabled high speed mode. High speed mode can be turn on by setting the clk_freq to 3400000. High speed HCNT and LCNT are needed as there is no default value provided. Signed-off-by: Weifeng Voon <weifeng.voon@intel.com> Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26i2c: designware: set the common config before the if elseWeifeng Voon
DW_IC_CON_MASTER, DW_IC_CON_SLAVE_DISABLE and DW_IC_CON_RESTART_EN are common config that need to be set for i2c designware master. So, configure it first without having to repeat inside the if else. Signed-off-by: Weifeng Voon <weifeng.voon@intel.com> Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26i2c: designware: Enable fast mode plusWeifeng Voon
This patch enabled fast mode plus. The fast mode plus and fast speed share the same HCNT and LCNT register. So, the fast mode plus will only run when the HCNT and LCNT value is provided. Else, it will run at fast speed as default. Signed-off-by: Weifeng Voon <weifeng.voon@intel.com> Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26i2c: designware: get fast plus and high speed *CNT configurationWeifeng Voon
I2C designware controller can run at fast mode plus and high speed. This patch adds the capability to get the HCNT, LCNT configuration via FPCN (fast plus) and HSCN (high speed) ACPI method. Signed-off-by: Weifeng Voon <weifeng.voon@intel.com> Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26i2c: designware: Move clk_freq into struct dw_i2c_devWeifeng Voon
I2c designware controller operate speed is configured in the register IC_CON. Previously the operate speed is determined by a local variable clk_freq. This patch will move the local variable clk_freq into struct dw_i2c_dev. This change will ease the set and get of the clk_freq. Signed-off-by: Weifeng Voon <weifeng.voon@intel.com> Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26i2c: octeon: Use booleon values for booleon variablesJan Glauber
Initialize booleon values with true instead of 1. Signed-off-by: Jan Glauber <jglauber@cavium.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26i2c: octeon: Sort include files alphabeticallyJan Glauber
Sort include files alphabetically to reduce probability of merge conflicts. Signed-off-by: Jan Glauber <jglauber@cavium.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26i2c: octeon,thunderx: Move register offsets to structJan Glauber
The register offsets are different between Octeon and ThunderX so move them into the algorithm struct and get rid of the define. Signed-off-by: Jan Glauber <jglauber@cavium.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26i2c: thunderx: Add SMBUS alert supportJan Glauber
Add SMBUS alert interrupt support. For now only device tree is supported for specifying the alert. In case of ACPI an error is returned. Signed-off-by: Jan Glauber <jglauber@cavium.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26i2c: thunderx: Add i2c driver for ThunderX SOCJan Glauber
The ThunderX SOC uses the same i2c block as the Octeon SOC. The main difference is that on ThunderX the device is a PCI device so device probing is done via PCI, interrupts are MSI-X. The clock rates can be set via device tree or ACPI. Signed-off-by: Jan Glauber <jglauber@cavium.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26i2c: octeon: Split the driver into two partsJan Glauber
Move common functionality into a separate file in preparation of the re-use from the ThunderX i2c driver. Functions are slightly re-ordered but no other changes are included. Signed-off-by: Jan Glauber <jglauber@cavium.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-26i2c: octeon: Rename driver to prepare for splitJan Glauber
This is an intermediate commit in preparation of the driver split. The module rename in this commit will be reverted in the next patch, this is just done to make the series bisectible. Signed-off-by: Jan Glauber <jglauber@cavium.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-08-25i2c: pca954x: add device tree bindingPeter Rosin
No longer rely on the implicit matching with the i2c device name, use an explicit compatible string instead. Keep a direct pointer to the chip description instead of an index into the chip description array. Reviewed-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Peter Rosin <peda@axentia.se>