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path: root/drivers/i2c
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2013-11-15tree-wide: use reinit_completion instead of INIT_COMPLETIONWolfram Sang
Use this new function to make code more comprehensible, since we are reinitialzing the completion, not initializing. [akpm@linux-foundation.org: linux-next resyncs] Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Linus Walleij <linus.walleij@linaro.org> (personally at LCE13) Cc: Ingo Molnar <mingo@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-11-14Merge tag 'pm+acpi-3.13-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull ACPI and power management updates from Rafael J Wysocki: - New power capping framework and the the Intel Running Average Power Limit (RAPL) driver using it from Srinivas Pandruvada and Jacob Pan. - Addition of the in-kernel switching feature to the arm_big_little cpufreq driver from Viresh Kumar and Nicolas Pitre. - cpufreq support for iMac G5 from Aaro Koskinen. - Baytrail processors support for intel_pstate from Dirk Brandewie. - cpufreq support for Midway/ECX-2000 from Mark Langsdorf. - ARM vexpress/TC2 cpufreq support from Sudeep KarkadaNagesha. - ACPI power management support for the I2C and SPI bus types from Mika Westerberg and Lv Zheng. - cpufreq core fixes and cleanups from Viresh Kumar, Srivatsa S Bhat, Stratos Karafotis, Xiaoguang Chen, Lan Tianyu. - cpufreq drivers updates (mostly fixes and cleanups) from Viresh Kumar, Aaro Koskinen, Jungseok Lee, Sudeep KarkadaNagesha, Lukasz Majewski, Manish Badarkhe, Hans-Christian Egtvedt, Evgeny Kapaev. - intel_pstate updates from Dirk Brandewie and Adrian Huang. - ACPICA update to version 20130927 includig fixes and cleanups and some reduction of divergences between the ACPICA code in the kernel and ACPICA upstream in order to improve the automatic ACPICA patch generation process. From Bob Moore, Lv Zheng, Tomasz Nowicki, Naresh Bhat, Bjorn Helgaas, David E Box. - ACPI IPMI driver fixes and cleanups from Lv Zheng. - ACPI hotplug fixes and cleanups from Bjorn Helgaas, Toshi Kani, Zhang Yanfei, Rafael J Wysocki. - Conversion of the ACPI AC driver to the platform bus type and multiple driver fixes and cleanups related to ACPI from Zhang Rui. - ACPI processor driver fixes and cleanups from Hanjun Guo, Jiang Liu, Bartlomiej Zolnierkiewicz, Mathieu Rhéaume, Rafael J Wysocki. - Fixes and cleanups and new blacklist entries related to the ACPI video support from Aaron Lu, Felipe Contreras, Lennart Poettering, Kirill Tkhai. - cpuidle core cleanups from Viresh Kumar and Lorenzo Pieralisi. - cpuidle drivers fixes and cleanups from Daniel Lezcano, Jingoo Han, Bartlomiej Zolnierkiewicz, Prarit Bhargava. - devfreq updates from Sachin Kamat, Dan Carpenter, Manish Badarkhe. - Operation Performance Points (OPP) core updates from Nishanth Menon. - Runtime power management core fix from Rafael J Wysocki and update from Ulf Hansson. - Hibernation fixes from Aaron Lu and Rafael J Wysocki. - Device suspend/resume lockup detection mechanism from Benoit Goby. - Removal of unused proc directories created for various ACPI drivers from Lan Tianyu. - ACPI LPSS driver fix and new device IDs for the ACPI platform scan handler from Heikki Krogerus and Jarkko Nikula. - New ACPI _OSI blacklist entry for Toshiba NB100 from Levente Kurusa. - Assorted fixes and cleanups related to ACPI from Andy Shevchenko, Al Stone, Bartlomiej Zolnierkiewicz, Colin Ian King, Dan Carpenter, Felipe Contreras, Jianguo Wu, Lan Tianyu, Yinghai Lu, Mathias Krause, Liu Chuansheng. - Assorted PM fixes and cleanups from Andy Shevchenko, Thierry Reding, Jean-Christophe Plagniol-Villard. * tag 'pm+acpi-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (386 commits) cpufreq: conservative: fix requested_freq reduction issue ACPI / hotplug: Consolidate deferred execution of ACPI hotplug routines PM / runtime: Use pm_runtime_put_sync() in __device_release_driver() ACPI / event: remove unneeded NULL pointer check Revert "ACPI / video: Ignore BIOS initial backlight value for HP 250 G1" ACPI / video: Quirk initial backlight level 0 ACPI / video: Fix initial level validity test intel_pstate: skip the driver if ACPI has power mgmt option PM / hibernate: Avoid overflow in hibernate_preallocate_memory() ACPI / hotplug: Do not execute "insert in progress" _OST ACPI / hotplug: Carry out PCI root eject directly ACPI / hotplug: Merge device hot-removal routines ACPI / hotplug: Make acpi_bus_hot_remove_device() internal ACPI / hotplug: Simplify device ejection routines ACPI / hotplug: Fix handle_root_bridge_removal() ACPI / hotplug: Refuse to hot-remove all objects with disabled hotplug ACPI / scan: Start matching drivers after trying scan handlers ACPI: Remove acpi_pci_slot_init() headers from internal.h ACPI / blacklist: fix name of ThinkPad Edge E530 PowerCap: Fix build error with option -Werror=format-security ... Conflicts: arch/arm/mach-omap2/opp.c drivers/Kconfig drivers/spi/spi.c
2013-11-07Merge remote-tracking branch 'grant/devicetree/next' into for-nextRob Herring
2013-10-28Merge branch 'acpi-pm'Rafael J. Wysocki
* acpi-pm: spi: attach/detach SPI device to the ACPI power domain i2c: attach/detach I2C client device to the ACPI power domain ACPI / PM: allow child devices to ignore parent power state
2013-10-24of/irq: Use irq_of_parse_and_map()Thierry Reding
Replace some instances of of_irq_map_one()/irq_create_of_mapping() and of_irq_to_resource() by the simpler equivalent irq_of_parse_and_map(). Signed-off-by: Thierry Reding <treding@nvidia.com> Acked-by: Rob Herring <rob.herring@calxeda.com> [grant.likely: resolved conflicts with core code renames] Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-10-11i2c: attach/detach I2C client device to the ACPI power domainLv Zheng
If the I2C client device is enumerated from ACPI namespace it might have ACPI methods that needs to be called in order to transition the device to different power states (such as _PSx). Implement this for I2C client devices by checking if the device has an ACPI handle and if that's the case, attach it to the ACPI power domain. In addition we make sure that the device is fully powered when its ->probe() function gets called. For non-ACPI devices this patch is a no-op. Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-10-10i2c: i2c-mux-pinctrl: use deferred probe when adapter not foundWolfram Sang
If it is not there yet, it might appear later. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-10-10i2c: i2c-arb-gpio-challenge: use deferred probe when adapter not foundWolfram Sang
If it is not there yet, it might appear later. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-10-10i2c: i2c-mux-gpio: use deferred probingIonut Nicu
If the i2c-parent bus driver is not loaded, returning -ENODEV will force people to unload and then reload the module again to get it working. Signed-off-by: Ionut Nicu <ioan.nicu.ext@nsn.com> Acked-by: Peter Korsgaard <peter.korsgaard@barco.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-10-10i2c: i2c-mux-gpio: don't ignore of_get_named_gpio errorsIonut Nicu
of_get_named_gpio could return -E_PROBE_DEFER or another error code. This error should be passed further instead of being ignored. Signed-off-by: Ionut Nicu <ioan.nicu.ext@nsn.com> Acked-by: Peter Korsgaard <peter.korsgaard@barco.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-10-10i2c: omap: Clear ARDY bit twiceTaras Kondratiuk
Initially commit cb527ede1bf6ff2008a025606f25344b8ed7b4ac "i2c-omap: Double clear of ARDY status in IRQ handler" added a workaround for undocumented errata ProDB0017052. But then commit 1d7afc95946487945cc7f5019b41255b72224b70 "i2c: omap: ack IRQ in parts" refactored code and missed one of ARDY clearings. So current code violates errata. It causes often i2c bus timeouts on my Pandaboard. This patch adds a second clearing in place. Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Taras Kondratiuk <taras.kondratiuk@linaro.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Cc: stable@kernel.org
2013-10-10i2c: Not all adapters have a parentJean Delvare
The code in acpi_i2c_register_devices() assumes that all i2c adapters have a parent. This is not necessarily the case, for example the i2c-stub driver instantiate a virtual i2c adapter without a parent. Check for this to avoid a NULL pointer deference. Signed-off-by: Jean Delvare <jdelvare@suse.de> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-10-10i2c: i2c-stu300: replace platform_driver_probe to support deferred probingWolfram Sang
Subsystems like pinctrl and gpio rightfully make use of deferred probing at core level. Now, deferred drivers won't be retried if they don't have a .probe function specified in the driver struct. Fix this driver to have that, so the devices it supports won't get lost in a deferred probe. Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-10-10i2c: i2c-mxs: replace platform_driver_probe to support deferred probingWolfram Sang
Subsystems like pinctrl and gpio rightfully make use of deferred probing at core level. Now, deferred drivers won't be retried if they don't have a .probe function specified in the driver struct. Fix this driver to have that, so the devices it supports won't get lost in a deferred probe. Acked-by: Marek Vasut <marex@denx.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-10-10i2c: i2c-imx: replace platform_driver_probe to support deferred probingWolfram Sang
Subsystems like pinctrl and gpio rightfully make use of deferred probing at core level. Now, deferred drivers won't be retried if they don't have a .probe function specified in the driver struct. Fix this driver to have that, so the devices it supports won't get lost in a deferred probe. Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-10-10i2c: i2c-designware-platdrv: replace platform_driver_probe to support ↵Wolfram Sang
deferred probing Subsystems like pinctrl and gpio rightfully make use of deferred probing at core level. Now, deferred drivers won't be retried if they don't have a .probe function specified in the driver struct. Fix this driver to have that, so the devices it supports won't get lost in a deferred probe. Reported-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-10-09drivers: clean-up prom.h implicit includesRob Herring
Powerpc is a mess of implicit includes by prom.h. Add the necessary explicit includes to drivers in preparation of prom.h cleanup. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Grant Likely <grant.likely@linaro.org>
2013-09-28i2c: ismt: initialize DMA bufferJames Ralston
This patch adds code to initialize the DMA buffer to compensate for possible hardware data corruption. Signed-off-by: James Ralston <james.d.ralston@intel.com> [wsa: changed to use 'sizeof'] Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-09-27i2c: designware: 10-bit addressing mode enabling if I2C_DYNAMIC_TAR_UPDATE ↵Chew, Chiau Ee
is set According to Designware I2C spec, if I2C_DYNAMIC_TAR_UPDATE is set to 1, the 10-bit addressing mode is controlled by IC_10BITADDR_MASTER bit of IC_TAR register instead of IC_CON register. The IC_10BITADDR_MASTER in IC_CON register becomes read-only copy. Since I2C_DYNAMIC_TAR_UPDATE value can't be detected from hardware register, so we will always set the IC_10BITADDR_MASTER bit in both IC_CON and IC_TAR register whenever 10-bit addresing mode is requested by user application. Signed-off-by: Chew, Chiau Ee <chiau.ee.chew@intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-09-27i2c: mv64xxx: Do not use writel_relaxed()Thierry Reding
The driver is used on PowerPC which don't provide writel_relaxed(). This breaks the c2k and prpmc2800 default configurations. To fix the build, turn the calls to writel_relaxed() into writel(). The impacts for ARM should be minimal. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-09-27i2c: mv64xxx: Fix some build warningsThierry Reding
Some functions and variables are only used if the configuration selects HAVE_CLK. Protect them with a corresponding #ifdef CONFIG_HAVE_CLK block to avoid compiler warnings. Signed-off-by: Thierry Reding <treding@nvidia.com> [wsa: added marker to #endif] Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-09-27i2c: s3c2410: fix clk_disable/clk_unprepare WARNingsKim Phillips
commit d16933b33914a6dff38a4ecbe8edce44a17898e8 "i2c: s3c2410: Move location of clk_prepare_enable() call in probe function" refactored clk_enable and clk_disable calls yet neglected to remove the clk_disable_unprepare call in the module's remove(). It helps remove warnings on an arndale during unbind: echo 12c90000.i2c > /sys/bus/platform/devices/12c90000.i2c/driver/unbind ------------[ cut here ]------------ WARNING: CPU: 0 PID: 2548 at drivers/clk/clk.c:842 clk_disable+0x18/0x24() Modules linked in: CPU: 0 PID: 2548 Comm: bash Not tainted 3.11.0-next-20130916-00003-gf4bddbc #6 [<c0014d48>] (unwind_backtrace+0x0/0xf8) from [<c00117d0>] (show_stack+0x10/0x14) [<c00117d0>] (show_stack+0x10/0x14) from [<c0361be8>] (dump_stack+0x6c/0xac) [<c0361be8>] (dump_stack+0x6c/0xac) from [<c001d864>] (warn_slowpath_common+0x64/0x88) [<c001d864>] (warn_slowpath_common+0x64/0x88) from [<c001d8a4>] (warn_slowpath_null+0x1c/0x24) [<c001d8a4>] (warn_slowpath_null+0x1c/0x24) from [<c02c4a64>] (clk_disable+0x18/0x24) [<c02c4a64>] (clk_disable+0x18/0x24) from [<c028d0b0>] (s3c24xx_i2c_remove+0x28/0x70) [<c028d0b0>] (s3c24xx_i2c_remove+0x28/0x70) from [<c0217a10>] (platform_drv_remove+0x18/0x1c) [<c0217a10>] (platform_drv_remove+0x18/0x1c) from [<c0216358>] (__device_release_driver+0x58/0xb4) [<c0216358>] (__device_release_driver+0x58/0xb4) from [<c02163d0>] (device_release_driver+0x1c/0x28) [<c02163d0>] (device_release_driver+0x1c/0x28) from [<c02153c0>] (unbind_store+0x58/0x90) [<c02153c0>] (unbind_store+0x58/0x90) from [<c0214c90>] (drv_attr_store+0x20/0x2c) [<c0214c90>] (drv_attr_store+0x20/0x2c) from [<c01032c0>] (sysfs_write_file+0x168/0x198) [<c01032c0>] (sysfs_write_file+0x168/0x198) from [<c00ae1c0>] (vfs_write+0xb0/0x194) [<c00ae1c0>] (vfs_write+0xb0/0x194) from [<c00ae594>] (SyS_write+0x3c/0x70) [<c00ae594>] (SyS_write+0x3c/0x70) from [<c000e3e0>] (ret_fast_syscall+0x0/0x30) ---[ end trace 4c9f9403066f57a6 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 2548 at drivers/clk/clk.c:751 clk_unprepare+0x14/0x1c() Modules linked in: CPU: 0 PID: 2548 Comm: bash Tainted: G W 3.11.0-next-20130916-00003-gf4bddbc #6 [<c0014d48>] (unwind_backtrace+0x0/0xf8) from [<c00117d0>] (show_stack+0x10/0x14) [<c00117d0>] (show_stack+0x10/0x14) from [<c0361be8>] (dump_stack+0x6c/0xac) [<c0361be8>] (dump_stack+0x6c/0xac) from [<c001d864>] (warn_slowpath_common+0x64/0x88) [<c001d864>] (warn_slowpath_common+0x64/0x88) from [<c001d8a4>] (warn_slowpath_null+0x1c/0x24) [<c001d8a4>] (warn_slowpath_null+0x1c/0x24) from [<c02c5834>] (clk_unprepare+0x14/0x1c) [<c02c5834>] (clk_unprepare+0x14/0x1c) from [<c028d0b8>] (s3c24xx_i2c_remove+0x30/0x70) [<c028d0b8>] (s3c24xx_i2c_remove+0x30/0x70) from [<c0217a10>] (platform_drv_remove+0x18/0x1c) [<c0217a10>] (platform_drv_remove+0x18/0x1c) from [<c0216358>] (__device_release_driver+0x58/0xb4) [<c0216358>] (__device_release_driver+0x58/0xb4) from [<c02163d0>] (device_release_driver+0x1c/0x28) [<c02163d0>] (device_release_driver+0x1c/0x28) from [<c02153c0>] (unbind_store+0x58/0x90) [<c02153c0>] (unbind_store+0x58/0x90) from [<c0214c90>] (drv_attr_store+0x20/0x2c) [<c0214c90>] (drv_attr_store+0x20/0x2c) from [<c01032c0>] (sysfs_write_file+0x168/0x198) [<c01032c0>] (sysfs_write_file+0x168/0x198) from [<c00ae1c0>] (vfs_write+0xb0/0x194) [<c00ae1c0>] (vfs_write+0xb0/0x194) from [<c00ae594>] (SyS_write+0x3c/0x70) [<c00ae594>] (SyS_write+0x3c/0x70) from [<c000e3e0>] (ret_fast_syscall+0x0/0x30) ---[ end trace 4c9f9403066f57a7 ]--- Signed-off-by: Kim Phillips <kim.phillips@linaro.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-09-13Remove GENERIC_HARDIRQ config optionMartin Schwidefsky
After the last architecture switched to generic hard irqs the config options HAVE_GENERIC_HARDIRQS & GENERIC_HARDIRQS and the related code for !CONFIG_GENERIC_HARDIRQS can be removed. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-09-10i2c: davinci: Fix bad dev_get_platdata() conversionOlof Johansson
commit 6d4028c644e (i2c: use dev_get_platdata()) did a bad conversion of this one case: drivers/i2c/busses/i2c-davinci.c: In function 'davinci_i2c_probe': drivers/i2c/busses/i2c-davinci.c:665:2: warning: passing argument 1 of 'dev_get_platdata' from incompatible pointer type [enabled by default] Reviewed-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Olof Johansson <olof@lixom.net>
2013-09-04i2c: rcar: add rcar-H2 supportNguyen Viet Dung
This patch modify I2C driver of rcar-H1 to usable on both rcar-H1 and rcar-H2. Signed-off-by: Nguyen Viet Dung <nv-dung@jinso.co.jp> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-28i2c: sirf: retry 3 times as sometimes we get random noack and timeoutZhiwu Song
let i2c core retry 3 times as sometimes we get random noack and timeout even when we access an existing i2c client. Signed-off-by: Zhiwu Song <Zhiwu.Song@csr.com> Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-28i2c: sirf: support reverse direction of addressZhiwu Song
if users set I2C_M_REV_DIR_ADDR, revert the direction of address. Signed-off-by: Zhiwu Song <Zhiwu.Song@csr.com> Signed-off-by: Rongjun Ying <rongjun.ying@csr.com> Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-28i2c: sirf: fix the typo for setting bitrate to less than 100kZhiwu Song
there is a typo before, it makes the final bitrate wrong, this patch fixes it. Signed-off-by: Zhiwu Song <Zhiwu.Song@csr.com> Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-28i2c: sirf: we need to wait I2C_RESET status in resumeZhiwu Song
this fixes the issue that we lost to wait the i2c reset finished. Signed-off-by: Zhiwu Song <Zhiwu.Song@csr.com> Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-28i2c: sirf: reset i2c controller early after we get a noackZhiwu Song
Due to hardware ANOMALY, we need to reset I2C earlier after we get NOACK while accessing non-existing clients, otherwise we will get errors even we access existing clients later Signed-off-by: Zhiwu Song <Zhiwu.Song@csr.com> Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-28i2c: designware: get SDA hold time, HCNT and LCNT configuration from ACPIMika Westerberg
Some Intel LPSS I2C devices make the SDA hold time and *CNT parameters available via SSCN (standard mode) and FMCN (fast mode) ACPI methods. Implement support for this so that we check whether an ACPI method exists and if it does, fill in the SDA hold time and *CNT values to the device private structure for core to use. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-28i2c: designware: make HCNT/LCNT values configurableMika Westerberg
The DesignWare I2C controller has high count (HCNT) and low count (LCNT) registers for each of the I2C speed modes (standard and fast). These registers are programmed based on the input clock speed in the driver. The current code calculates these values based on the input clock speed and tries hard to meet the I2C bus timing requirements. This could result non-optimal values with regarding to the bus speed. For example on Intel BayTrail we get bus speed of 315.41kHz which is ~20% slower than we would expect (400kHz) in fast mode (even though the timing requirements are met). This patch makes it possible for the platform code to pass more optimal HCNT/LCNT values to the core driver if they are known beforehand. If these are not set we use the calculated and more conservative values. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Shinya Kuribayashi <skuribay@pobox.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-28i2c: mpc: cleanup clock API useGerhard Sittig
make the MPC I2C driver get, prepare and enable the gated clock item for register access during probe; disable and unprepare the clock upon remove(), put is done by the devm approach; hold a reference to the clock over the period of use clock lookup is non-fatal in this implementation as not all platforms may provide clock specs in their device tree, but failure to enable a clock when specified is considered fatal Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-28i2c: pnx: fix error return code in i2c_pnx_probe()Wei Yongjun
Fix to return a negative error code in the irq get error handling case instead of 0, as done elsewhere in this function. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> [wsa: fixed wrong exit point, too] Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-28i2c: ismt: add error return code in probe()Wolfram Sang
Return error code in the error case, and not success. Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-23i2c: move ACPI helpers into the coreMika Westerberg
This follows what has already been done for the DeviceTree helpers. Move the ACPI helpers from drivers/acpi/acpi_i2c.c to the I2C core and update documentation accordingly. This also solves a problem reported by Jerry Snitselaar that we can't build the ACPI I2C helpers as a module. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-23i2c: move OF helpers into the coreWolfram Sang
I2C of helpers used to live in of_i2c.c but experience (from SPI) shows that it is much cleaner to have this in the core. This also removes a circular dependency between the helpers and the core, and so we can finally register child nodes in the core instead of doing this manually in each driver. So, fix the drivers and documentation, too. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-23i2c: mv64xxx: Fix timing issue on Armada XP (errata FE-8471889)Gregory CLEMENT
All the Armada XP (mv78230, mv78260 and mv78460) have a silicon issue in the I2C controller which violate the i2c repeated start timing. The I2C standard requires a minimum of 4.7us for the repeated start condition whereas the I2C controller of the Armada XP this time is 2.9us. So this patch adds a 5us delay for the start case only if the the compatible i2c-mv78230 is set. Based on the initals patches from Zbigniew Bodek Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Zbigniew Bodek <zbb@semihalf.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-23i2c: mv64xxx: Add I2C Transaction Generator supportGregory CLEMENT
The I2C Transaction Generator offloads CPU from managing I2C transfer step by step. This feature is currently only available on Armada XP, so usage of this mechanism is activated through device tree. Based on the work of Piotr Ziecik and rewrote to use the new way of handling multiples i2c messages. Signed-off-by: Piotr Ziecik <kosmo@semihalf.com> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-21i2c: powermac: fix return path on errorWolfram Sang
We want to bail out immediately if i2c_add_adapter failed and not try to register child nodes with a nilled adapter structure. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-19i2c: tiny-usb: do not use stack as URB transfer_bufferJussi Kivilinna
Patch fixes i2c-tiny-usb not to use stack as URB transfer_buffer. URB buffers need to be DMA-able, which stack is not. Patch is only compile tested. Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-19i2c: use dev_get_platdata()Jingoo Han
Use the wrapper function for retrieving the platform data instead of accessing dev->platform_data directly. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-19i2c: omap: query STP always when NACK is receivedGrygorii Strashko
According to I2C specification the NACK should be handled as folowing: "When SDA remains HIGH during this ninth clock pulse, this is defined as the Not Acknowledge signal. The master can then gene rate either a STOP condition to abort the transfer, or a repeated START condition to start a new transfer." [http://www.nxp.com/documents/user_manual/UM10204.pdf] The same is recomened by TI I2C wiki: http://processors.wiki.ti.com/index.php/I2C_Tips Currently, the OMAP I2C driver interrupts I2C trunsfer in case of NACK, but It queries Stop condition OMAP_I2C_CON_REG.STP=1 only if NACK has been received during the last message transmitting/recieving. This may lead to stuck Bus in "Bus Busy" until I2C IP reset (idle/enable). Hence, fix it by querying Stop condition (STP) always when NACK is received. Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Acked-by: Hein Tibosch <hein_tibosch@yahoo.es> Acked-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-16i2c: mxs: fix broken timing calculationLothar Waßmann
The timing calculation is rather bogus and gives extremely wrong results for higher frequencies (on an i.MX28). E.g. instead of 400 kHz I measured 770 kHz. Implement a calculation that adheres to the I2C spec and gives exact results for I2C frequencies from 12.56 kHz to 960 kHz. Also the bus_free and leadin parameters are programmed according to the I2C spec for standard and fast mode. This was tested on a Ka-Ro TX28 module with a DS1339, TSC2007, PCA9554 and SGTL5000 client. Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de> Acked-by: Marek Vasut <marex@denx.de> [wsa: patch fixes whitespace issue, too] Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-15drivers/i2c/busses/i2c-ocores.c: simplify use of devm_ioremap_resourceJulia Lawall
Remove unneeded error handling on the result of a call to platform_get_resource when the value is passed to devm_ioremap_resource. Move the call to platform_get_resource adjacent to the call to devm_ioremap_resource to make the connection between them more clear. A simplified version of the semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression pdev,res,n,e,e1; expression ret != 0; identifier l; @@ - res = platform_get_resource(pdev, IORESOURCE_MEM, n); ... when != res - if (res == NULL) { ... \(goto l;\|return ret;\) } ... when != res + res = platform_get_resource(pdev, IORESOURCE_MEM, n); e = devm_ioremap_resource(e1, res); // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-15i2c: imx: Add Vybrid VF610 I2C controller supportJingchang Lu
Add Freescale Vybrid VF610 I2C controller support to imx I2C driver framework. Signed-off-by: Jason Jin <Jason.jin@freescale.com> Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-15i2c: imx: add struct to hold more configurable quirksJingchang Lu
This add struct imx_i2c_hwdata to hold more quirks data which may vary between SoCs, thus the driver can operate on more differences to support more SoCs. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-15i2c: imx: add INT flag and IEN bit operatation codesJingchang Lu
This add bits operation macro that differ between SoCs. Interrupt flags clear operation in I2SR differ between SoCs: write zero to clear(w0c) INT flag on i.MX, but write one to clear(w1c) INT flag on Vybrid. I2C module enable operation in I2CR also differ between SoCs: set I2CR_IEN bit enable the module on i.MX, but clear I2CR_IEN bit enable the module on Vybrid. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-15i2c: imx: change register offset representationJingchang Lu
the I2C register offset may different between SoCs, to provid support for all these chips, split the register offset into a fixed base address and a variable shift value, then the full register offset will be calculated by reg_off = ( reg_base_addr << reg_shift) Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-15i2c: imx: wrap registers read/write to inline functionJingchang Lu
wrap the readb(), writeb() into inline function calls. It would make the driver more clearer to support platform with different register offset. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-16 01:59:58 +0000