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Because the offload mechanism can fall back to a standard transfer,
having two seperate initialization states is unfortunate. Let's just
have one state which does things consistently. This fixes a bug where
some preparation was missing when the fallback happened. And it makes
the code much easier to follow. To implement this, we put the check
if offload is possible at the top of the offload setup function.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Cc: stable@vger.kernel.org # v3.12+
Fixes: 930ab3d403ae (i2c: mv64xxx: Add I2C Transaction Generator support)
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git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull more i2c updates from Wolfram Sang:
"Mostly bugfixes, small but wanted cleanups, and Paul's init.h removal
applied"
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: rcar: fix NACK error code
i2c: update i2c_algorithm documentation
i2c: rcar: use devm_clk_get to ensure clock is properly ref-counted
i2c: rcar: do not print error if device nacks transfer
i2c: rely on driver core when sanitizing devices
i2c: delete non-required instances of include <linux/init.h>
i2c: acorn: is tristate and should use module.h
i2c: piix4: Standardize log messages
i2c: piix4: Use different message for AMD Auxiliary SMBus Controller
i2c: piix4: Add support for AMD ML and CZ SMBus changes
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git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging
Pull hwmon updates from Jean Delvare:
"This include it87 driver improvements, and a tree-wide change of my
e-mail address"
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
Update Jean Delvare's e-mail address
hwmon: (it87) Print proper names for the IT8771E and IT8772E
hwmon: (it87) Add support for the ITE IT8603E
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Signed-off-by: Jean Delvare <khali@linux-fr.org>
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The response to a bus NACK is to return -ENXIO instead of the
-EREMOTEIO being currently returned by the driver.
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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The current i2c-rcar driver does clk_get() without a corresponding
clk_put(). Add the clk to the driver private data and then get it
with the devm functions so that it is released when the driver is
unbound.
Note, we do not call clk_prepare_enable() at this point due to the
very possible magic that is being done by the pm_runtime system
underneath the driver.
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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The i2c-rcar driver currently prints an error message if the master_xfer
callback fails. However if the bus is being probed then lots of NAKs
will be generated, causing the output of a number of errors printed.
To solve this, disable the print if the error is not -EREMOTEIO.
An example of running i2cdetect:
10: i2c-rcar e6530000.i2c: error -121 : 15
-- i2c-rcar e6530000.i2c: error -121 : 15
-- 12 i2c-rcar e6530000.i2c: error -121 : 15
-- i2c-rcar e6530000.i2c: error -121 : 15
-- i2c-rcar e6530000.i2c: error -121 : 15
-- i2c-rcar e6530000.i2c: error -121 : 15
-- i2c-rcar e6530000.i2c: error -121 : 15
-- i2c-rcar e6530000.i2c: error -121 : 15
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI and power management updates from Rafael Wysocki:
"As far as the number of commits goes, the top spot belongs to ACPI
this time with cpufreq in the second position and a handful of PM
core, PNP and cpuidle updates. They are fixes and cleanups mostly, as
usual, with a couple of new features in the mix.
The most visible change is probably that we will create struct
acpi_device objects (visible in sysfs) for all devices represented in
the ACPI tables regardless of their status and there will be a new
sysfs attribute under those objects allowing user space to check that
status via _STA.
Consequently, ACPI device eject or generally hot-removal will not
delete those objects, unless the table containing the corresponding
namespace nodes is unloaded, which is extremely rare. Also ACPI
container hotplug will be handled quite a bit differently and cpufreq
will support CPU boost ("turbo") generically and not only in the
acpi-cpufreq driver.
Specifics:
- ACPI core changes to make it create a struct acpi_device object for
every device represented in the ACPI tables during all namespace
scans regardless of the current status of that device. In
accordance with this, ACPI hotplug operations will not delete those
objects, unless the underlying ACPI tables go away.
- On top of the above, new sysfs attribute for ACPI device objects
allowing user space to check device status by triggering the
execution of _STA for its ACPI object. From Srinivas Pandruvada.
- ACPI core hotplug changes reducing code duplication, integrating
the PCI root hotplug with the core and reworking container hotplug.
- ACPI core simplifications making it use ACPI_COMPANION() in the
code "glueing" ACPI device objects to "physical" devices.
- ACPICA update to upstream version 20131218. This adds support for
the DBG2 and PCCT tables to ACPICA, fixes some bugs and improves
debug facilities. From Bob Moore, Lv Zheng and Betty Dall.
- Init code change to carry out the early ACPI initialization
earlier. That should allow us to use ACPI during the timekeeping
initialization and possibly to simplify the EFI initialization too.
From Chun-Yi Lee.
- Clenups of the inclusions of ACPI headers in many places all over
from Lv Zheng and Rashika Kheria (work in progress).
- New helper for ACPI _DSM execution and rework of the code in
drivers that uses _DSM to execute it via the new helper. From
Jiang Liu.
- New Win8 OSI blacklist entries from Takashi Iwai.
- Assorted ACPI fixes and cleanups from Al Stone, Emil Goode, Hanjun
Guo, Lan Tianyu, Masanari Iida, Oliver Neukum, Prarit Bhargava,
Rashika Kheria, Tang Chen, Zhang Rui.
- intel_pstate driver updates, including proper Baytrail support,
from Dirk Brandewie and intel_pstate documentation from Ramkumar
Ramachandra.
- Generic CPU boost ("turbo") support for cpufreq from Lukasz
Majewski.
- powernow-k6 cpufreq driver fixes from Mikulas Patocka.
- cpufreq core fixes and cleanups from Viresh Kumar, Jane Li, Mark
Brown.
- Assorted cpufreq drivers fixes and cleanups from Anson Huang, John
Tobias, Paul Bolle, Paul Walmsley, Sachin Kamat, Shawn Guo, Viresh
Kumar.
- cpuidle cleanups from Bartlomiej Zolnierkiewicz.
- Support for hibernation APM events from Bin Shi.
- Hibernation fix to avoid bringing up nonboot CPUs with ACPI EC
disabled during thaw transitions from Bjørn Mork.
- PM core fixes and cleanups from Ben Dooks, Leonardo Potenza, Ulf
Hansson.
- PNP subsystem fixes and cleanups from Dmitry Torokhov, Levente
Kurusa, Rashika Kheria.
- New tool for profiling system suspend from Todd E Brandt and a
cpupower tool cleanup from One Thousand Gnomes"
* tag 'pm+acpi-3.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (153 commits)
thermal: exynos: boost: Automatic enable/disable of BOOST feature (at Exynos4412)
cpufreq: exynos4x12: Change L0 driver data to CPUFREQ_BOOST_FREQ
Documentation: cpufreq / boost: Update BOOST documentation
cpufreq: exynos: Extend Exynos cpufreq driver to support boost
cpufreq / boost: Kconfig: Support for software-managed BOOST
acpi-cpufreq: Adjust the code to use the common boost attribute
cpufreq: Add boost frequency support in core
intel_pstate: Add trace point to report internal state.
cpufreq: introduce cpufreq_generic_get() routine
ARM: SA1100: Create dummy clk_get_rate() to avoid build failures
cpufreq: stats: create sysfs entries when cpufreq_stats is a module
cpufreq: stats: free table and remove sysfs entry in a single routine
cpufreq: stats: remove hotplug notifiers
cpufreq: stats: handle cpufreq_unregister_driver() and suspend/resume properly
cpufreq: speedstep: remove unused speedstep_get_state
platform: introduce OF style 'modalias' support for platform bus
PM / tools: new tool for suspend/resume performance optimization
ACPI: fix module autoloading for ACPI enumerated devices
ACPI: add module autoloading support for ACPI enumerated devices
ACPI: fix create_modalias() return value handling
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Commit 0998d0631001 (device-core: Ensure drvdata = NULL when no driver
is bound) modified the driver core to always clear .driver and .drvdata
on remove or probe error. No need for the I2C core to do it.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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None of these files are actually using any __init type directives
and hence don't need to include <linux/init.h>. Most are just a
left over from __devinit and __cpuinit removal, or simply due to
code getting copied from one driver to the next.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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This file is controlled by a tristate Kconfig option, and hence
needs to include module.h so that it can get module_init() once
we relocate it from init.h into module.h in the future.
Note that module_exit() appears to be missing from the driver, so
it is questionable whether it would actually work for a removal
and reload cycle if it was configured for a modular build.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Use exactly the same log messages in the legacy setup function and the
SB800+ setup function. This way strings can be reused, which saves
some bytes in the generated binary.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Same messages for AMD main and auxiliary SMBus controllers lead to confusion,
this patch is to remove confusion and keep consistent with non-AMD products.
Signed-off-by: Shane Huang <shane.huang@amd.com>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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The locations of SMBus register base address and enablement bit are changed
from AMD ML, which need this patch to be supported.
Signed-off-by: Shane Huang <shane.huang@amd.com>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@vger.kernel.org
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC cleanups from Olof Johansson:
"This is the branch where we usually queue up cleanup efforts, moving
drivers out of the architecture directory, header file restructuring,
etc. Sometimes they tangle with new development so it's hard to keep
it strictly to cleanups.
Some of the things included in this branch are:
* Atmel SAMA5 conversion to common clock
* Reset framework conversion for tegra platforms
- Some of this depends on tegra clock driver reworks that are shared
with Mike Turquette's clk tree.
* Tegra DMA refactoring, which are shared branches with the DMA tree.
* Removal of some header files on exynos to prepare for
multiplatform"
* tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (169 commits)
ARM: mvebu: move Armada 370/XP specific definitions to armada-370-xp.h
ARM: mvebu: remove prototypes of non-existing functions from common.h
ARM: mvebu: move ARMADA_XP_MAX_CPUS to armada-370-xp.h
serial: sh-sci: Rework baud rate calculation
serial: sh-sci: Compute overrun_bit without using baud rate algo
serial: sh-sci: Remove unused GPIO request code
serial: sh-sci: Move overrun_bit and error_mask fields out of pdata
serial: sh-sci: Support resources passed through platform resources
serial: sh-sci: Don't check IRQ in verify port operation
serial: sh-sci: Set the UPF_FIXED_PORT flag
serial: sh-sci: Remove duplicate interrupt check in verify port op
serial: sh-sci: Simplify baud rate calculation algorithms
serial: sh-sci: Remove baud rate calculation algorithm 5
serial: sh-sci: Sort headers alphabetically
ARM: EXYNOS: Kill exynos_pm_late_initcall()
ARM: EXYNOS: Consolidate selection of PM_GENERIC_DOMAINS for Exynos4
ARM: at91: switch Calao QIL-A9260 board to DT
clk: at91: fix pmc_clk_ids data type attriubte
PM / devfreq: use inclusion <mach/map.h> instead of <plat/map-s5p.h>
ARM: EXYNOS: remove <mach/regs-clock.h> for exynos
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC non-critical fixes from Olof Johansson:
"As usual, we have a batch of fixes that weren't considered significant
enough to warrant going into the later -rcs for previous release, so
they are queued up on this branch.
A handful of these are for various DT fixups for Samsung platforms,
and a handful of other minor things.
There are also a couple of stable-marked patches for mvebu -- they
came in quite late and we decided to keep them deferred until the
first -stable release to get more coverage instead of squeezing them
into 3.13"
* tag 'fixes-nc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (32 commits)
ARM: at91: smc: bug fix in sam9_smc_cs_read()
i2c: mv64xxx: Document the newly introduced Armada XP A0 compatible
i2c: mv64xxx: Fix bus hang on A0 version of the Armada XP SoCs
ARM: mvebu: Add quirk for i2c for the OpenBlocks AX3-4 board
ARM: mvebu: Add support to get the ID and the revision of a SoC
ARM: dts: msm: Fix gpio interrupt and reg length
irqchip: sirf: set IRQ_LEVEL status_flags
ARM: OMAP2+: gpmc: Move legacy GPMC width setting
ARM: OMAP2+: gpmc: Introduce gpmc_set_legacy()
ARM: OMAP2+: gpmc: Move initialization outside the gpmc_t condition
ARM: OMAP2+: board-generic: update SoC compatibility strings
Documentation: dt: OMAP: explicitly state SoC compatible strings
ARM: OMAP2+: enable AM33xx SOC EVM audio
ARM: OMAP2+: Select USB PHY for AM335x SoC
ARM: bcm2835: Fix grammar in help message
ARM: msm: trout: fix uninit var warning
ARM: dts: Use MSHC controller for eMMC memory for exynos4412-trats2
ARM: dts: Fix definition of MSHC device tree nodes for exynos4x12
ARM: dts: add clock provider for mshc node for Exynos4412 SOC
clk: samsung: exynos4: Fix definition of div_mmc_pre4 divider
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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Pull trivial tree updates from Jiri Kosina:
"Usual rocket science stuff from trivial.git"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits)
neighbour.h: fix comment
sched: Fix warning on make htmldocs caused by wait.h
slab: struct kmem_cache is protected by slab_mutex
doc: Fix typo in USB Gadget Documentation
of/Kconfig: Spelling s/one/once/
mkregtable: Fix sscanf handling
lp5523, lp8501: comment improvements
thermal: rcar: comment spelling
treewide: fix comments and printk msgs
IXP4xx: remove '1 &&' from a condition check in ixp4xx_restart()
Documentation: update /proc/uptime field description
Documentation: Fix size parameter for snprintf
arm: fix comment header and macro name
asm-generic: uaccess: Spelling s/a ny/any/
mtd: onenand: fix comment header
doc: driver-model/platform.txt: fix a typo
drivers: fix typo in DEVTMPFS_MOUNT Kconfig help text
doc: Fix typo (acces_process_vm -> access_process_vm)
treewide: Fix typos in printk
drivers/gpu/drm/qxl/Kconfig: reformat the help text
...
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ACPI enumerated devices has ACPI style _HID and _CID strings,
all of these strings can be used for both driver loading and matching.
Currently, in Platform, I2C and SPI bus, the ACPI style driver matching
is supported by invoking acpi_driver_match_device() in bus .match() callback.
But, the module autoloading is still broken.
For example, there is any ACPI device with _HID "INTABCD" that is
enumerated to platform bus, and we have a driver that can probe it.
The driver exports its module_alias as "acpi:INTABCD" use the following code
static const struct acpi_device_id xxx_acpi_match[] = {
{ "INTABCD", 0 },
{ }
};
MODULE_DEVICE_TABLE(acpi, xxx_acpi_match);
But, unfortunately, the device' modalias is shown as "platform:INTABCD:00",
please refer to modalias_show() and platform_uevent() in
drivers/base/platform.c.
This results in that the driver will not be loaded automatically when the
device node is created, because their modalias do not match.
This also applies to I2C and SPI bus.
With this patch, the device' modalias will be shown as "acpi:INTABCD" as well.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Acked-by: Mark Brown <broonie@linaro.org>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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If used 64 bit compiler GCC warns that:
drivers/i2c/busses/i2c-s3c2410.c: In function ‘s3c24xx_get_device_quirks’:
drivers/i2c/busses/i2c-s3c2410.c:168:10: warning: cast from pointer to integer
of different size [-Wpointer-to-int-cast]
This patch fixes this by converting "unsigned int" to "kernel_ulong_t".
Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Use devm_*() functions to make cleanup paths simpler,
and remove redundant return value check of platform_get_resource()
because the value is checked by devm_ioremap_resource().
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Signed-off-by: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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next/fixes-non-critical
From Jason Cooper:
mvebu late fixes for v3.13
- mvebu
- fix boot hang on Armada XP due to broken i2c offloading in A0 SoC revision
(specifically experienced on some early OpenBlocks AX3-4 boards)
* tag 'mvebu-fixes-3.13' of git://git.infradead.org/linux-mvebu:
i2c: mv64xxx: Document the newly introduced Armada XP A0 compatible
i2c: mv64xxx: Fix bus hang on A0 version of the Armada XP SoCs
ARM: mvebu: Add quirk for i2c for the OpenBlocks AX3-4 board
ARM: mvebu: Add support to get the ID and the revision of a SoC
Signed-off-by: Kevin Hilman <khilman@linaro.org>
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The first variants of Armada XP SoCs (A0 stepping) have issues related
to the i2c controller which prevent to use the offload mechanism and
lead to a kernel hang during boot.
The commit introduces a new the compatible string
marvell,mv78230-a0-i2c for the i2c controller. When this compatible
string is used the driver disables the offload mechanism and the
kernel no more hangs on these SoCs.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Reported-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: stable@vger.kernel.org # v3.12+: af8d1c63afcb: ARM: mvebu: Add support to get the ID and the revision of a SoC
Cc: stable@vger.kernel.org # v3.12+: 85e618a1be2b: ARM: mvebu: Add quirk for i2c for the OpenBlocks AX3-4 board
Cc: stable@vger.kernel.org # v3.12+
Fixes: 930ab3d403ae (i2c: mv64xxx: Add I2C Transaction Generator support)
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
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This patch adds the support of the I2C_SMBUS_I2C_BLOCK_DATA transaction
type for the iSMT SMBus Controller.
Signed-off-by: Robert Valiquette <robert.valiquette@intel.com>
Acked-by: Seth Heasley <seth.heasley@intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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OSIF, Open Source InterFace, is a USB based i2c bus master. The
origional design was based on i2c-tiny-usb, but more modern versions
of the firmware running on the MegaAVR microcontroller use a different
protocol over the USB. This code is based on Barry Carter
<barry.carter@gmail.com> driver.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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The RobotFuzz device is not compatible with i2c-tiny-usb. Remove its
entry from the USB table so that the new correct driver can be used.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Since 93abe8e4 (clk: add non CONFIG_HAVE_CLK routines) code using clk.h
like this platform driver need not depend on HAVE_CLK. Also, remove a
redundant clk.h include from core driver.
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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The Nomadik I2C is now configured from the device tree on all platforms
using this controller. Delete the platform data header and move the
definitions into the driver so it is all contained in one single file.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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The Nomadik I2C controller needs to have the slave set-up time
configured based off the clock used to drive the I2C bus block.
Currently this is done with static assignments assuming that the
block is clocked 48MHz which is pretty likely to be bug-prone.
Calculate the SLSU from the equation given in the datasheet
instead.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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cppcheck rightfully says:
drivers/i2c/busses/i2c-viperboard.c:169: style: Variable 'bytes_xfer' is assigned a value that is never used.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Lars Poeschel <poeschel@lemonage.de>
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This patch fixed several typo in printk from various
part of kernel source.
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Simplified the probe and remove functions using devm_* functions
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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IRQ handler has to be register first before IRQ
is enabled in xiic_reinit().
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Code changes to fix checkpatch warnings listed below.
- WARNING: please, no space before tabs
- WARNING: quoted string split across lines
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Use devm_request_region() to make cleanup paths simpler.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Use devm_kzalloc() functions to make cleanup paths simpler.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Lars Poeschel <poeschel@lemonage.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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smatch rightfully says:
drivers/i2c/busses/i2c-imx.c:610 i2c_imx_probe() info: why not propagate 'irq' from platform_get_irq() instead of (-2)?
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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For Exynos4 and Exynos5 SoCs from Samsung the i2c clock is based
on a fixed 66 MHz peripheral clock, and therefore is completely
independent of the cpu frequency.
Thus, registering for a CPU freq notifier is very wasteful.
This patch modifes the code such that, i2c bus registers to
cpu_freq_transition only if CONFIG_CPU_FREQ_S3C24XX is enabled.
This change should save a bunch of cpufreq transitions calls
which does not apply to exynos SoCs.
Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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This patch adds polling mode support for i2c-s3c2410 driver.The
SATA PHY controller's CMU and TRSV block's are of I2C register
map in exynos5250.These blocks can be configured using i2c.
But i2c controller instance on which these block's sits lacks an
interrupt line.Also the current i2c-s3c2410 driver is only interrupt
driven, thus a polling mode support is required in the driver for
supporting this controller. This patch adds this support to the driver.
Signed-off-by: Vasanth Ananthan <vasanth.a@samsung.com>
Signed-off-by: Yuvaraj Kumar C D <yuvaraj.cd@samsung.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Hardware supported by the i2c sh_mobile and rcar drivers is only found
on SUPERH or ARCH_SHMOBILE platforms. Restrict non-COMPILE_TEST
compilation to them.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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If a reset GPIO support is specified, request the GPIO and get the chip
out of reset at probe time.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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This simplifies error and removal paths.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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This helps avoiding duplicate includes.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Tested with a r7s72100 genmai board acessing an eeprom.
Signed-off-by: Wolfram Sang <wsa@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into next/cleanup
From Stephen Warren:
ARM: tegra: implement common DMA and resets DT bindings
This series converts the Tegra DTs and drivers to use the common/
standard DMA and reset bindings, rather than custom bindings. It also
adds complete documentation for the Tegra clock bindings without
actually changing any binding definitions.
This conversion relies on a few sets of patches in branches from outside
the Tegra tree:
1) A patch to add an DMA channel request API which allows deferred probe
to be implemented.
2) A patch to implement a common part of the of_xlate function for DMA
controllers.
3) Some ASoC patches (which in turn rely on (1) above), which support
deferred probe during DMA channel allocation.
4) The Tegra clock driver changes for 3.14.
Consequently, this branch is based on a merge of all of those external
branches.
In turn, this branch is or will be pulled into a few places that either
rely on features introduced here, or would otherwise conflict with the
patches:
a) Tegra's own for-3.14/powergate and for-4.14/dt branches, to avoid
conflicts.
b) The DRM tree, which introduces new code that relies on the reset
controller framework introduced in this branch, and to avoid
conflicts.
* tag 'tegra-for-3.14-dmas-resets-rework' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux: (30 commits)
spi: tegra: checking for ERR_PTR instead of NULL
ASoC: tegra: update module reset list for Tegra124
clk: tegra: remove bogus PCIE_XCLK
clk: tegra: remove legacy reset APIs
ARM: tegra: remove legacy DMA entries from DT
ARM: tegra: remove legacy clock entries from DT
USB: EHCI: tegra: use reset framework
Input: tegra-kbc - use reset framework
serial: tegra: convert to standard DMA DT bindings
serial: tegra: use reset framework
spi: tegra: convert to standard DMA DT bindings
spi: tegra: use reset framework
staging: nvec: use reset framework
i2c: tegra: use reset framework
ASoC: tegra: convert to standard DMA DT bindings
ASoC: tegra: allocate AHUB FIFO during probe() not startup()
ASoC: tegra: call pm_runtime APIs around register accesses
ASoC: tegra: use reset framework
dma: tegra: register as an OF DMA controller
dma: tegra: use reset framework
...
Signed-off-by: Olof Johansson <olof@lixom.net>
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Correct spelling typo in various part of kernel
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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clk_prepare_enable() may fail, so let's check its return value and propagate it
in the case of error.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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If a muxed i2c bus gets created the default retry count and
timeout of the muxed bus is zero. Hence it it possible that you
end up with a situation where the parent controller sets a default
retry count and timeout which gets applied and used while the muxed
bus (using the same controller) has a default retry count of zero
and a default timeout of 1s (set in i2c_add_adapter()). This can be
solved by initializing the retry count and timeout of the muxed
bus with the values used by the the parent at creation time.
Signed-off-by: Elie De Brauwer <eliedebrauwer@gmail.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Tegra's clock driver now provides an implementation of the common
reset API (include/linux/reset.h). Use this instead of the old Tegra-
specific API; that will soon be removed.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Reviewed-by: Thierry Reding <treding@nvidia.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:
"Some easy but needed fixes for i2c drivers since rc1"
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: bcm2835: Linking platform nodes to adapter nodes
i2c: omap: raw read and write endian fix
i2c: i2c-bcm-kona: Fix module build
i2c: i2c-diolan-u2c: different usb endpoints for DLN-2-U2C
i2c: bcm-kona: remove duplicated include
i2c: davinci: raw read and write endian fix
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