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path: root/drivers/i2c/busses
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2013-04-15i2c-designware-pci: use dev_err() instead of printk()Andy Shevchenko
With dev_err() we can get the device instance printed as well and is pretty much standard to use dev_* macros in the drivers anyway. In addition correct the indentation of probe() arguments. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-04-15i2c-designware: move to managed functions (devm_*)Andy Shevchenko
This makes the error handling much more simpler than open-coding everything and in addition makes the probe function smaller and tidier. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-04-09i2c: s3c2410: Add SMBus emulation for block readJaemin Yoo
SMBus read and write are supported by the emulation layer of i2c framework if the controller doesn't have SMBus features. I2C_M_RECV_LEN flag is used to let i2c drivers know rx length is not yet determined but will be read to the first byte in rx buffer. s3c2410 doesn't handle this flag. So only one byte is read from slave. There fore following two features are added to the driver code. 1. skip rx length check if I2C_M_RECV_LEN is set and the length is 1. 2. add actual bytes to the rx length after reading first bytes if I2C_M_RECV_LEN. I2C_M_RECV_LEN is only set for SMBus command. So this code does not affect legacy codes which only use i2c command for s3c2410. Signed-off-by: Jaemin Yoo <jmin.yoo@samsung.com> Tested-by: Prasanna Kumar <prasanna.ps@samsung.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-04-02i2c: Ignore return value of i2c_del_adapter()Lars-Peter Clausen
i2c_del_adapter() always returns 0. So all checks testing whether it will be non zero will always evaluate to false and the conditional code is dead code. This patch updates all callers of i2c_del_mux_adapter() to ignore the return value and assume that it will always succeed (which it will). In a subsequent patch the return type of i2c_del_adapter() will be made void. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Ben Hutchings <bhutchings@solarflare.com> Reviewed-by: Jean Delvare <khali@linux-fr.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-03-29i2c: at91: Use of_match_ptr() macroSachin Kamat
This eliminates having an #ifdef returning NULL for the case when OF is disabled. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-03-29i2c: davinci: update to devm_* APIVishwanathrao Badarkhe, Manish
Update the code to use devm_* API so that driver core will manage resources. Signed-off-by: Vishwanathrao Badarkhe, Manish <manishv.b@ti.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-03-29i2c: davinci: rename recover bus functionsWolfram Sang
Since we have generic i2c bus recover routines now, these custom ones need to be renamed to fix the namespace clash. Proper conversion needs to be done by someone who has access to the hardware. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-03-27i2c: gpio: Add support for deferred probingJean Delvare
GPIOs may not be available immediately when i2c-gpio looks for them. Implement support for deferred probing so that probing can be attempted again later when GPIO pins are finally available. Signed-off-by: Jean Delvare <khali@linux-fr.org> Tested-by: Bo Shen <voice.shen@atmel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-03-24i2c: s3c2410: fixup the styling of the newly moved register definitionsHeiko Stübner
Make them conform more to established standards. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-03-24i2c: s3c2410: move mach/regs-iic.h into i2c-s3c2410 device driverHeiko Stübner
The register definitions are only used in the driver itself. This also removes the last dependency on plat/ includes from the i2c driver. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-03-24i2c: ismt: remove duplicate constWolfram Sang
(SMATCH) drivers/i2c/busses/i2c-ismt.c:186:14: warning: duplicate const Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-03-24i2c: tegra: assume CONFIG_OF, remove platform dataStephen Warren
Tegra only supports, and always enables, device tree. Remove all ifdefs and runtime checks for DT support from the driver. Platform data is therefore no longer required. Delete the header that defines it. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-03-24i2c: pxa: Use i2c-core to get bus number nowDoug Anderson
The commit: "i2c-core: dt: Pick i2c bus number from i2c alias if present" adds support for automatically picking the bus number based on the alias ID. Remove the now unnecessary code from i2c-pxa that did the same thing. Signed-off-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-03-23Merge branch 'i2c/for-current' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c fixes from Wolfram Sang: "One bugfix for the tegra driver. Two updates regarding email addresses and MAINTAINERS which I like to have up-to-date so people can be reached immediately. While we are here, there is on PCI_ID addition." * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: MAINTAINERS: add maintainer entry for atmel i2c driver i2c: Fix my e-mail address in drivers and documentation i2c: iSMT: add Intel Avoton DeviceIDs i2c: tegra: check the clk_prepare_enable() return value
2013-03-22i2c: iSMT: add Intel Avoton DeviceIDsSeth Heasley
This patch adds the iSMT SMBus Controller DeviceIDs for the Intel Avoton SOC. Signed-off-by: Seth Heasley <seth.heasley@intel.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-03-22i2c: tegra: check the clk_prepare_enable() return valueLaxman Dewangan
NVIDIA's Tegra SoC allows read/write of controller register only if controller clock is enabled. System hangs if read/write happens to registers without enabling clock. clk_prepare_enable() can be fail due to unknown reason and hence adding check for return value of this function. If this function success then only access register otherwise return to caller with error. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Cc: stable@kernel.org
2013-03-11drivers/i2c: remove !S390 dependency, add missing GENERIC_HARDIRQS dependenciesHeiko Carstens
Remove !S390 dependency from i2c Kconfig, since s390 now supports PCI, HAS_IOMEM and HAS_DMA, however we need to add a couple of GENERIC_HARDIRQS dependecies to fix compile and link errors like these: ERROR: "devm_request_threaded_irq" [drivers/i2c/i2c-smbus.ko] undefined! ERROR: "devm_request_threaded_irq" [drivers/i2c/busses/i2c-ocores.ko] undefined! Cc: Wolfram Sang <w.sang@pengutronix.de> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-02-26Merge branch 'i2c/for-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c updates from Wolfram Sang: "Highlights: - new drivers for Intel ismt & Broadcom bcm2835 - a number of drivers got support for more variants and mostly got cleaned up on the way (sis630, i801, at91, tegra, designware) - i2c got rid of all *_set_drvdata(..., NULL) on remove/probe failure - removed the i2c_smbus_process_call from the core since there are no users - mxs can now switch between PIO and DMA depending on the message size and the bus speed can now be arbitrary In addition, there is the usual bunch of fixes, cleanups, devm_* conversions, etc" Fixed conflict (and buggy devm_* conversion) in i2c-s3c2410.c * 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (39 commits) i2c: Remove unneeded xxx_set_drvdata(..., NULL) calls i2c: pxa: remove incorrect __exit annotations i2c: ocores: Fix pointer to integer cast warning i2c: tegra: remove warning dump if timeout happen in transfer i2c: fix i2c-ismt.c printk format warning i2c: i801: Add Device IDs for Intel Wellsburg PCH i2c: add bcm2835 driver i2c: ismt: Add Seth and Myself as maintainers i2c: sis630: checkpatch cleanup i2c: sis630: display unsigned hex i2c: sis630: use hex to constants for SMBus commands i2c: sis630: fix behavior after collision i2c: sis630: clear sticky bits i2c: sis630: Add SIS964 support i2c: isch: Add module parameter for backbone clock rate if divider is unset i2c: at91: fix unsed variable warning when building with !CONFIG_OF i2c: Adding support for Intel iSMT SMBus 2.0 host controller i2c: sh_mobile: don't send a stop condition by default inside transfers i2c: sh_mobile: eliminate an open-coded "goto" loop i2c: sh_mobile: fix timeout error handling ...
2013-02-21Merge tag 'soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds
Pull ARM SoC-specific updates from Arnd Bergmann: "This is a larger set of new functionality for the existing SoC families, including: - vt8500 gains support for new CPU cores, notably the Cortex-A9 based wm8850 - prima2 gains support for the "marco" SoC family, its SMP based cousin - tegra gains support for the new Tegra4 (Tegra114) family - socfpga now supports a newer version of the hardware including SMP - i.mx31 and bcm2835 are now using DT probing for their clocks - lots of updates for sh-mobile - OMAP updates for clocks, power management and USB - i.mx6q and tegra now support cpuidle - kirkwood now supports PCIe hot plugging - tegra clock support is updated - tegra USB PHY probing gets implemented diffently" * tag 'soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (148 commits) ARM: prima2: remove duplicate v7_invalidate_l1 ARM: shmobile: r8a7779: Correct TMU clock support again ARM: prima2: fix __init section for cpu hotplug ARM: OMAP: Consolidate OMAP USB-HS platform data (part 3/3) ARM: OMAP: Consolidate OMAP USB-HS platform data (part 1/3) arm: socfpga: Add SMP support for actual socfpga harware arm: Add v7_invalidate_l1 to cache-v7.S arm: socfpga: Add entries to enable make dtbs socfpga arm: socfpga: Add new device tree source for actual socfpga HW ARM: tegra: sort Kconfig selects for Tegra114 ARM: tegra: enable ARCH_REQUIRE_GPIOLIB for Tegra114 ARM: tegra: Fix build error w/ ARCH_TEGRA_114_SOC w/o ARCH_TEGRA_3x_SOC ARM: tegra: Fix build error for gic update ARM: tegra: remove empty tegra_smp_init_cpus() ARM: shmobile: Register ARM architected timer ARM: MARCO: fix the build issue due to gic-vic-to-irqchip move ARM: shmobile: r8a7779: Correct TMU clock support ARM: mxs_defconfig: Select CONFIG_DEVTMPFS_MOUNT ARM: mxs: decrease mxs_clockevent_device.min_delta_ns to 2 clock cycles ARM: mxs: use apbx bus clock to drive the timers on timrotv2 ...
2013-02-21i2c: Remove unneeded xxx_set_drvdata(..., NULL) callsDoug Anderson
There is simply no reason to be manually setting the private driver data to NULL in the remove/fail to probe cases. This is just extra cruft code that can be removed. A few notes: * Nothing relies on drvdata being set to NULL. * The __device_release_driver() function eventually calls dev_set_drvdata(dev, NULL) anyway, so there's no need to do it twice. * I verified that there were no cases where xxx_get_drvdata() was being called in these drivers and checking for / relying on the NULL return value. This could be cleaned up kernel-wide but for now just take the baby step and remove from the i2c subsystem. Reported-by: Wolfram Sang <wsa@the-dreams.de> Reported-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Doug Anderson <dianders@chromium.org> Reviewed-by: Jean Delvare <khali@linux-fr.org> Acked-by: Peter Korsgaard <jacmet@sunsite.dk> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Marek Vasut <marex@denx.de> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-21i2c: pxa: remove incorrect __exit annotationsDmitry Torokhov
The remove() methods should not be marked __exit unless we are using platform_driver_probe() which disables unbinding device from driver via sysfs. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-21Merge tag 'tty-3.9-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial patches from Greg Kroah-Hartman: "Here's the big tty/serial driver patches for 3.9-rc1. More tty port rework and fixes from Jiri here, as well as lots of individual serial driver updates and fixes. All of these have been in the linux-next tree for a while." * tag 'tty-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (140 commits) tty: mxser: improve error handling in mxser_probe() and mxser_module_init() serial: imx: fix uninitialized variable warning serial: tegra: assume CONFIG_OF TTY: do not update atime/mtime on read/write lguest: select CONFIG_TTY to build properly. ARM defconfigs: add missing inclusions of linux/platform_device.h fb/exynos: include platform_device.h ARM: sa1100/assabet: include platform_device.h directly serial: imx: Fix recursive locking bug pps: Fix build breakage from decoupling pps from tty tty: Remove ancient hardpps() pps: Additional cleanups in uart_handle_dcd_change pps: Move timestamp read into PPS code proper pps: Don't crash the machine when exiting will do pps: Fix a use-after free bug when unregistering a source. pps: Use pps_lookup_dev to reduce ldisc coupling pps: Add pps_lookup_dev() function tty: serial: uartlite: Support uartlite on big and little endian systems tty: serial: uartlite: Fix sparse and checkpatch warnings serial/arc-uart: Miscll DT related updates (Grant's review comments) ... Fix up trivial conflicts, mostly just due to the TTY config option clashing with the EXPERIMENTAL removal.
2013-02-21Merge tag 'driver-core-3.9-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core patches from Greg Kroah-Hartman: "Here is the big driver core merge for 3.9-rc1 There are two major series here, both of which touch lots of drivers all over the kernel, and will cause you some merge conflicts: - add a new function called devm_ioremap_resource() to properly be able to check return values. - remove CONFIG_EXPERIMENTAL Other than those patches, there's not much here, some minor fixes and updates" Fix up trivial conflicts * tag 'driver-core-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (221 commits) base: memory: fix soft/hard_offline_page permissions drivercore: Fix ordering between deferred_probe and exiting initcalls backlight: fix class_find_device() arguments TTY: mark tty_get_device call with the proper const values driver-core: constify data for class_find_device() firmware: Ignore abort check when no user-helper is used firmware: Reduce ifdef CONFIG_FW_LOADER_USER_HELPER firmware: Make user-mode helper optional firmware: Refactoring for splitting user-mode helper code Driver core: treat unregistered bus_types as having no devices watchdog: Convert to devm_ioremap_resource() thermal: Convert to devm_ioremap_resource() spi: Convert to devm_ioremap_resource() power: Convert to devm_ioremap_resource() mtd: Convert to devm_ioremap_resource() mmc: Convert to devm_ioremap_resource() mfd: Convert to devm_ioremap_resource() media: Convert to devm_ioremap_resource() iommu: Convert to devm_ioremap_resource() drm: Convert to devm_ioremap_resource() ...
2013-02-21i2c: ocores: Fix pointer to integer cast warningJayachandran C
After commit a000b8c1 [i2c: ocores: Add support for the GRLIB port of the controller and use function pointers for getreg and setreg function], compiling i2c-ocores.c for 64-bit gives the following warning: drivers/i2c/busses/i2c-ocores.c: In function 'ocores_i2c_of_probe': drivers/i2c/busses/i2c-ocores.c:334:15: warning: cast from pointer to integer of different size Fix it by casting the pointer to long. Signed-off-by: Jayachandran C <jchandra@broadcom.com> Acked-by: Peter Korsgaard <jacmet@sunsite.dk> Acked-by: Andreas Larsson <andreas@gaisler.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-02-15i2c: tegra: remove warning dump if timeout happen in transferLaxman Dewangan
If timeout error occurs in the i2c transfer then it was dumping warning of call stack. Remove the warning dump as there is may be possibility that some slave devices are busy and not responding the i2c communication. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-15i2c: fix i2c-ismt.c printk format warningRandy Dunlap
Fix printk format warning. dma_addr_t can be 32-bit or 64-bit, so cast it to long long for printing. This also matches the printk format specifier that is already used. drivers/i2c/busses/i2c-ismt.c:532:3: warning: format '%llX' expects argument of type 'long long unsigned int', but argument 4 has type 'dma_addr_t' [-Wformat] Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-15i2c: i801: Add Device IDs for Intel Wellsburg PCHJames Ralston
This patch adds the SMBus Device IDs for the Intel Wellsburg PCH Signed-off-by: James Ralston <james.d.ralston@intel.com> Reviewed-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-12i2c: add bcm2835 driverStephen Warren
This implements a very basic I2C host driver for the BCM2835 SoC. Missing features so far are: * 10-bit addressing. * DMA. Reviewed-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-11i2c: sis630: checkpatch cleanupAmaury Decrême
This patch corrects checkpatch errors. The changes has also been removed as it has less meaning with version control tools. Signed-off-by: Amaury Decrême <amaury.decreme@gmail.com> Reviewed-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-11i2c: sis630: display unsigned hexAmaury Decrême
This patch corrects the display of the acpi_base unsigned hex value. Signed-off-by: Amaury Decrême <amaury.decreme@gmail.com> Reviewed-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-11i2c: sis630: use hex to constants for SMBus commandsAmaury Decrême
This patch replaces hexadecimal values by constants for SMBus commands. Signed-off-by: Amaury Decrême <amaury.decreme@gmail.com> Reviewed-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-11i2c: sis630: fix behavior after collisionAmaury Decrême
Datasheet on collision: SMBus Collision (SMBCOL_STS) This bit is set when a SMBus Collision condition occurs and SMBus Host loses in the bus arbitration. The software should clear this bit and re-start SMBus operation. As the status will be cleared in transaction_end, we can remove the sis630_write and prepare to return -EAGAIN to retry. Signed-off-by: Amaury Decrême <amaury.decreme@gmail.com> Reviewed-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-11i2c: sis630: clear sticky bitsAmaury Decrême
The sticky bits must be cleared at the end of the transaction by writing a 1 to all fields. Datasheet: SMBus Status (SMB_STS) The following registers are all sticky bits and only can be cleared by writing a one to their corresponding fields. Signed-off-by: Amaury Decrême <amaury.decreme@gmail.com> Reviewed-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-11i2c: sis630: Add SIS964 supportAmaury Decrême
Signed-off-by: Amaury Decrême <amaury.decreme@gmail.com> Reviewed-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-11i2c: isch: Add module parameter for backbone clock rate if divider is unsetAlexander Stein
It was observed the Host Clock Divider was not written by the driver. It was still set to (default) 0, if not already set by BIOS, which caused garbage on SMBus. This driver adds a parameters which is used to calculate the divider appropriately for a default bitrate of 100 KHz. This new divider is only applied if the clock divider is still default 0. Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com> Reviewed-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-10i2c: at91: fix unsed variable warning when building with !CONFIG_OFJoachim Eastwood
Commit 70d46a2 "i2c: at91: add dt support to i2c-at91" added DT only support for at91sam9x5. Building i2c-at91 without CONFIG_OF now warns about at91sam9x5_config as being unused. drivers/i2c/busses/i2c-at91.c:556:30: warning: 'at91sam9x5_config' defined but not used [-Wunused-variable] Move at91sam9x5_config under the defined(CONFIG_OF) guard as new AT91 SoCs will be DT only. Signed-off-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-10i2c: Adding support for Intel iSMT SMBus 2.0 host controllerNeil Horman
The iSMT (Intel SMBus Message Transport) supports multi-master I2C/SMBus, as well as IPMI. It's operation is DMA-based and utilizes descriptors to initiate transactions on the bus. The iSMT hardware can act as both a master and a target, although this driver only supports being a master. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Bill Brown <bill.e.brown@intel.com> Tested-by: Seth Heasley <seth.heasley@intel.com> Reviewed-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-10i2c: sh_mobile: don't send a stop condition by default inside transfersGuennadi Liakhovetski
By default there should be no stop bit on I2C between single messages within transfers. Fix the driver to comply and only send a stop bit at the end of transfers or if I2C_M_STOP is set. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-10i2c: sh_mobile: eliminate an open-coded "goto" loopGuennadi Liakhovetski
Eliminate an open-coded "goto" loop by introducing a function. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-10i2c: sh_mobile: fix timeout error handlingGuennadi Liakhovetski
In a timeout case return an error immediately from the driver's .master_xfer() method, instead of continuing and letting higher layers fail. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-10i2c: sh_mobile: cosmetic: trivially simplify 2 functionsGuennadi Liakhovetski
Reduce 2 boolean functions from "if (condition) return 1; return 0;" to "return condition;" Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-10i2c: mxs: Implement arbitrary clock speed derivation algorithmMarek Vasut
This patch drops the i2c timing tables from this driver and instead derives the timing based from the requested clock sleep. The timing tables were completely wrong anyway when observed on a scope. This new algorithm is also only derived by using a scope, but it seems to produce much more accurate result. Signed-off-by: Marek Vasut <marex@denx.de> Tested-by: Shawn Guo <shawn.guo@linaro.org> [wsa: changed messages from dev_err to dev_warn] Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-08i2c: i801: SMBus patch for Intel Avoton DeviceIDsSeth Heasley
This patch adds the PCU SMBus DeviceID for the Intel Avoton SOC. Signed-off-by: Seth Heasley <seth.heasley@intel.com> Reviewed-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
2013-02-05Merge tag 'tegra-for-3.9-soc-ccf' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into next/soc From Stephen Warren: ARM: tegra: Common Clock Framework rework Tegra already supports the common clock framework, but had issues: 1) The clock driver was located in arch/arm/mach-tegra/ rather than drivers/clk/. 2) A single "Tegra clock" type was implemented, rather than separate clock types for PLL, mux, divider, ... type in HW. 3) Clock lookups by device drivers were still driven by device name and connection ID, rather than through device tree. This pull request solves all three issues. This required some DT changes to add clocks properties, and driver changes to request clocks more "correctly". Finally, this rework allows all AUXDATA to be removed from Tegra board files, and various duplicate clock lookup entries to be removed from the driver. This pull request is based on the previous pull request, with tag tegra-for-3.9-cleanup. * tag 'tegra-for-3.9-soc-ccf' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra: (31 commits) clk: tegra30: remove unused TEGRA_CLK_DUPLICATE()s clk: tegra20: remove unused TEGRA_CLK_DUPLICATE()s ARM: tegra30: remove auxdata ARM: tegra20: remove auxdata ASoC: tegra: remove auxdata staging: nvec: remove use of clk_get_sys ARM: tegra: paz00: add clock information to DT ARM: tegra: add clock properties to Tegra30 DT ARM: tegra: add clock properties to Tegra20 DT spi: tegra: do not use clock name to get clock ARM: tegra: remove legacy clock code ARM: tegra: migrate to new clock code clk: tegra: add clock support for Tegra30 clk: tegra: add clock support for Tegra20 clk: tegra: add Tegra specific clocks ARM: tegra: define Tegra30 CAR binding ARM: tegra: define Tegra20 CAR binding ARM: tegra: move tegra_cpu_car.h to linux/clk/tegra.h ARM: tegra: add function to read chipid ARM: tegra: fix compile error when disable CPU_IDLE ... Signed-off-by: Olof Johansson <olof@lixom.net> Conflicts: arch/arm/mach-tegra/board-dt-tegra20.c arch/arm/mach-tegra/board-dt-tegra30.c arch/arm/mach-tegra/common.c arch/arm/mach-tegra/platsmp.c drivers/clocksource/Makefile
2013-01-28ARM: tegra: migrate to new clock codePrashant Gaikwad
Migrate Tegra clock support to drivers/clk/tegra, this involves moving: 1. definition of tegra_cpu_car_ops to clk.c 2. definition of reset functions to clk-peripheral.c 3. change parent of cpu clock. 4. Remove legacy clock initialization. 5. Initialize clocks using DT. 6. Remove all instance of mach/clk.h Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com> [swarren: use to_clk_periph_gate().] Signed-off-by: Stephen Warren <swarren@nvidia.com>
2013-01-28i2c: s3c2410: Add quirk to exclude GPIO config for exynos5440Giridhar Maruthy
Signed-off-by: Giridhar Maruthy <giridhar.m@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
2013-01-28i2c: mxs: Add PIO and mixed-DMA supportMarek Vasut
Add support for the PIO mode and mixed PIO/DMA mode support. The mixed PIO/DMA is the default mode of operation. This shall leverage overhead that the driver creates due to setting up DMA descriptors even for very short transfers. The current boundary between PIO/DMA 8 bytes, transfers shorter than 8 bytes are transfered by PIO, longer transfers use DMA. The performance of write transfers remains unchanged, while there is a minor improvement of read performance. Reading 16KB EEPROM with DMA-only operations gives a read speed of 39.5KB/s, while with then new mixed-mode the speed is blazing 40.6KB/s. Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
2013-01-28i2c: s3c2410: Remove err_cpufreq labelTushar Behera
err_cpufreq label is now used only once. It can be removed and related code can be moved to the caller location. Signed-off-by: Tushar Behera <tushar.behera@linaro.org> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
2013-01-28i2c: s3c2410: Move location of clk_prepare_enable() call in probe functionTushar Behera
In i2c-s3c2410 driver probe, only s3c24xx_i2c_init() needs the I2C clock to be enabled. Moving clk_prepare_enable() and clk_disable_unprepare() calls to around this function simplifies the return path of probe call. Signed-off-by: Tushar Behera <tushar.behera@linaro.org> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
2013-01-28i2c: s3c2410: Convert to use devm_* APIsTushar Behera
i2c-s3c2410 driver is modified to use devm_clk_get() and devm_request_irq(). This also simplifies the return path in driver's probe. Signed-off-by: Tushar Behera <tushar.behera@linaro.org> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>