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2013-04-02ACPI / I2C: Use parent's ACPI_HANDLE() in acpi_i2c_register_devices()Rafael J. Wysocki1-1/+0
The ACPI handle of struct i2c_adapter's dev member should not be set, because this causes that struct i2c_adapter to be associated with the ACPI device node corresponding to its parent as the second "physical_device", which is incorrect (this happens during the registration of struct i2c_adapter). Consequently, acpi_i2c_register_devices() should use the ACPI handle of the parent of the struct i2c_adapter it is called for rather than the struct i2c_adapter's ACPI handle (which should be NULL). Make that happen and modify the i2c-designware-platdrv driver, which currently is the only driver for ACPI-enumerated I2C controller chips, not to set the ACPI handle for the struct i2c_adapter it creates. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Aaron Lu <aaron.lu@intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Wolfram Sang <wsa@the-dreams.de>
2013-03-23Merge branch 'i2c/for-current' of ↵Linus Torvalds3-3/+14
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: Fix my e-mail address in drivers and documentationGuenter Roeck1-1/+1
My old e-mail address is no longer working. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-03-22i2c: iSMT: add Intel Avoton DeviceIDsSeth Heasley1-0/+2
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 Dewangan1-2/+11
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 Carstens2-3/+5
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>
2013-02-27idr: remove MAX_IDR_MASK and move left MAX_IDR_* into idr.cTejun Heo1-2/+0
MAX_IDR_MASK is another weirdness in the idr interface. As idr covers whole positive integer range, it's defined as 0x7fffffff or INT_MAX. Its usage in idr_find(), idr_replace() and idr_remove() is bizarre. They basically mask off the sign bit and operate on the rest, so if the caller, by accident, passes in a negative number, the sign bit will be masked off and the remaining part will be used as if that was the input, which is worse than crashing. The constant is visible in idr.h and there are several users in the kernel. * drivers/i2c/i2c-core.c:i2c_add_numbered_adapter() Basically used to test if adap->nr is a negative number which isn't -1 and returns -EINVAL if so. idr_alloc() already has negative @start checking (w/ WARN_ON_ONCE), so this can go away. * drivers/infiniband/core/cm.c:cm_alloc_id() drivers/infiniband/hw/mlx4/cm.c:id_map_alloc() Used to wrap cyclic @start. Can be replaced with max(next, 0). Note that this type of cyclic allocation using idr is buggy. These are prone to spurious -ENOSPC failure after the first wraparound. * fs/super.c:get_anon_bdev() The ID allocated from ida is masked off before being tested whether it's inside valid range. ida allocated ID can never be a negative number and the masking is unnecessary. Update idr_*() functions to fail with -EINVAL when negative @id is specified and update other MAX_IDR_MASK users as described above. This leaves MAX_IDR_MASK without any user, remove it and relocate other MAX_IDR_* constants to lib/idr.c. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Jean Delvare <khali@linux-fr.org> Cc: Roland Dreier <roland@kernel.org> Cc: Sean Hefty <sean.hefty@intel.com> Cc: Hal Rosenstock <hal.rosenstock@gmail.com> Cc: "Marciniszyn, Mike" <mike.marciniszyn@intel.com> Cc: Jack Morgenstein <jackm@dev.mellanox.co.il> Cc: Or Gerlitz <ogerlitz@mellanox.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Wolfram Sang <wolfram@the-dreams.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27i2c: convert to idr_alloc()Tejun Heo1-33/+11
Convert to the much saner new idr interface. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Jean Delvare <khali@linux-fr.org> Cc: Wolfram Sang <wolfram@the-dreams.de> Tested-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-26Merge branch 'for-linus' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs pile (part one) from Al Viro: "Assorted stuff - cleaning namei.c up a bit, fixing ->d_name/->d_parent locking violations, etc. The most visible changes here are death of FS_REVAL_DOT (replaced with "has ->d_weak_revalidate()") and a new helper getting from struct file to inode. Some bits of preparation to xattr method interface changes. Misc patches by various people sent this cycle *and* ocfs2 fixes from several cycles ago that should've been upstream right then. PS: the next vfs pile will be xattr stuff." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (46 commits) saner proc_get_inode() calling conventions proc: avoid extra pde_put() in proc_fill_super() fs: change return values from -EACCES to -EPERM fs/exec.c: make bprm_mm_init() static ocfs2/dlm: use GFP_ATOMIC inside a spin_lock ocfs2: fix possible use-after-free with AIO ocfs2: Fix oops in ocfs2_fast_symlink_readpage() code path get_empty_filp()/alloc_file() leave both ->f_pos and ->f_version zero target: writev() on single-element vector is pointless export kernel_write(), convert open-coded instances fs: encode_fh: return FILEID_INVALID if invalid fid_type kill f_vfsmnt vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op nfsd: handle vfs_getattr errors in acl protocol switch vfs_getattr() to struct path default SET_PERSONALITY() in linux/elf.h ceph: prepopulate inodes only when request is aborted d_hash_and_lookup(): export, switch open-coded instances 9p: switch v9fs_set_create_acl() to inode+fid, do it before d_instantiate() 9p: split dropping the acls from v9fs_set_create_acl() ...
2013-02-26Merge branch 'i2c/for-next' of ↵Linus Torvalds48-505/+2224
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 ...
2013-02-22new helper: file_inode(file)Al Viro1-2/+2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-21Merge tag 'soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds1-2/+1
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 ...
2013-02-22i2c: Remove unneeded xxx_set_drvdata(..., NULL) callsDoug Anderson35-64/+1
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>
2013-02-22i2c: pxa: remove incorrect __exit annotationsDmitry Torokhov1-2/+2
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 Torvalds1-0/+1
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 Torvalds13-52/+40
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 C1-1/+1
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 Dewangan1-1/+1
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 Dunlap1-1/+1
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 Ralston2-0/+16
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 Warren3-0/+355
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 Decrême1-105/+109
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 Decrême1-1/+1
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 Decrême1-14/+31
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 Decrême1-6/+1
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 Decrême1-3/+1
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 Decrême2-32/+60
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 Stein1-0/+17
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 Eastwood1-7/+7
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 Horman3-0/+974
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 Liakhovetski1-20/+59
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 Liakhovetski1-26/+34
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 Liakhovetski1-1/+4
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 Liakhovetski1-10/+4
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 Vasut1-39/+55
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 Heasley2-0/+4
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 Johansson1-2/+1
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 Gaikwad1-2/+1
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 Maruthy1-0/+2
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 Vasut1-13/+163
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 Behera1-5/+2
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 Behera1-17/+12
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 Behera1-11/+5
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>
2013-01-28i2c: s3c2410: Remove unnecessary label err_noclkTushar Behera1-6/+3
err_noclk label redirects to a simple return statement. Move the return statement to the caller location and remove the label. Signed-off-by: Tushar Behera <tushar.behera@linaro.org> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
2013-01-28i2c: nomadik: drop superfluous variable initializationWolfram Sang1-6/+3
cppcheck rightfully reports those as "reassigned a value before the old one has been used." Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cc: Linus Walleij <linus.walleij@stericsson.com>
2013-01-28i2c: nomadik: adopt pinctrl supportPatrice Chotard1-0/+89
Amend the I2C nomadik pin controller to optionally take a pin control handle and set the state of the pins to: - "default" on boot, resume and before performing an i2c transfer - "idle" after initial default, after resume default, and after each i2c xfer - "sleep" on suspend() This should make it possible to optimize energy usage for the pins both for the suspend/resume cycle, and for runtime cases inbetween I2C transfers. Signed-off-by: Patrice Chotard <patrice.chotard@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> [wsa: fixed braces on one else-branch] Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
2013-01-28i2c: at91: add of_device_id entry for at91rm9200Joachim Eastwood1-0/+3
Signed-off-by: Joachim Eastwood <manabian@gmail.com> Acked-by: Ludovic Ddesroches <ludovic.desroches@atmel.com> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
2013-01-28i2c: tegra: add support for Tegra114 SoCLaxman Dewangan1-14/+63
NVIDIA's Tegra114 has following enhanced feature in i2c controller: - Enable/disable control for per packet transfer complete interrupt. Earlier SoCs could not disable this. - Single clock source for standard/fast and HS mode clock speed. The clock divisor for fast/standard mode is added into the i2c controller to meet the HS and standard/fast mode of clock speed from single source. Add support for the above feature to make it functional on T114 SOCs. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
2013-01-28i2c-designware: add support for Intel LynxpointMika Westerberg1-3/+46
Intel Lynxpoint has two I2C controllers. These controllers are enumerated from ACPI namespace with IDs INT33C2 and INT33C3. Add support for these to the I2C DesignWare platform driver. This is based on the work of Dirk Brandewie. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
2013-01-28i2c-designware: add minimal support for runtime PMMika Westerberg1-0/+10
In order to save power the device should be put to low power states whenever it is not being used. We implement this by enabling minimal runtime PM support. There isn't much to do for the device itself as it is disabled once the last transfer is completed but subsystem/domain runtime PM hooks can save more power by power gating the device etc. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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