It just chops off the 'lock' and uses the ins__find, etc machinery to
call instruction specific parsers/beautifiers.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-4913ba2dzakz5rivgumosqbh@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Call of_i2c_register_devices() in probe function to register i2c devices
specified in the device tree or OF.
Signed-off-by: Ganesan Ramalingam <ganesanr@broadcom.com>
Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
[wsa: add proper braces]
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
The notification of the transfer complete by calling complete()
should be done after clearing all interrupt status.
This avoids the race condition of misconfigure the i2c controller
in multi-core environment.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: stable@kernel.org
These have already been removed from the classic MMU in favour of
L_PTE_MT_* macros.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The vfp_enable function enables access to the VFP co-processor register
space (cp10 and cp11) on the current CPU and must be called with
preemption disabled. Unfortunately, the vfp_init late initcall does not
disable preemption and can lead to an oops during boot if thread
migration occurs at the wrong time and we end up attempting to access
the FPSID on a CPU with VFP access disabled.
This patch fixes the initcall to call vfp_enable from a non-preemptible
context on each CPU and adds a BUG_ON(preemptible) to ensure that any
similar problems are easily spotted in the future.
Cc: stable@vger.kernel.org
Reported-by: Hyungwoo Yang <hwoo.yang@gmail.com>
Signed-off-by: Hyungwoo Yang <hyungwooy@nvidia.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Update the MAINTAINERS entry and all other references accordingly.
Based on an original patch by Wolfram Sang.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Peter Korsgaard <peter.korsgaard@barco.com>
[wsa: fixed merge conflict due to rework in i2c_add_mux_adapter()]
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
The slave address of device to be configured in packet
header as follows:
7 bit address: PacketHeader3[7:1]
10 bit address: PacketHeader3[9:0]
Fixing the code to make packet header3 properly.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Apply a naming pattern like in the rest of the subsystem to a first set
of mux drivers. Those drivers are the low-hanging fruit; we want to pick
them to motivate upcoming drivers to follow the new pattern. The missing
GPIO driver will be converted in a later patch.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com> (pca9541)
Acked-by: Jean Delvare <khali@linux-fr.org>
This finds the struct i2c_adapter * for a given device tree node. Just
like of_find_i2c_device_by_node.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
This converts a struct device * to a struct i2c_adapter * while verifying
that the device really is an I2C adapter. Just like i2c_verify_client.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
This patch adds support for s3c2440 I2C bus controller dedicated HDMIPHY device on
Exynos4 platform. Some quirks are introduced due to differences between HDMIPHY
and other I2C controllers on Exynos4. These differences are:
- no GPIOs, HDMIPHY is inside the SoC and the controller is connected
internally
- due to unknown reason (probably HW bug in HDMIPHY and/or the controller) a
transfer fails to finish. The controller hangs after sending the last byte,
the workaround for this bug is resetting the controller after each transfer
Signed-off-by: Tomasz Stanislawski <t.stanislaws@samsung.com>
Signed-off-by: Karol Lewandowski <k.lewandowsk@samsung.com>
Tested-by: Tomasz Stanislawski <t.stanislaws@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Reorganize driver a bit to better handle device tree-based systems:
- move machine type to driver's private structure instead of
quering platform device variants in runtime
- replace s3c24xx_i2c_type enum with unsigned int that holds
bitmask with revision-specific quirks
Signed-off-by: Karol Lewandowski <k.lewandowsk@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
We got multiple patches to add mux support to device tree, so people are
using it happily already and build up on it. I also used it in a project
without encountering problems. 20 months of EXPERIMENTAL should do for
this.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Michael Lawnick <ml.lawnick@gmx.de>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: David Daney <ddaney.cavm@gmail.com>
For 'normal' i2c bus drivers, we can call of_i2c_register_devices()
and have the device tree framework automatically populate the bus with
the devices specified in the device tree.
This patch adds a common code to the i2c mux framework to have the mux
sub-busses be populated by the of_i2c_register_devices() too. If the
mux device has an of_node, we populate the sub-bus' of_node so that
the subsequent call to of_i2c_register_devices() will find the
corresponding devices.
It seemed better to put this logic in i2c_add_mux_adapter() rather
than the individual mux drivers, as they will all probably want to do
the same thing.
Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Tested-by: Lars-Peter Clausen <lars@metafoo.de>
[wsa: removed superfluous ret-variable and fixed a typo in a comment]
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
And adjust all callers.
The new device parameter is used in the next patch to initialize the
mux's of_node so that its children may be automatically populated.
Signed-off-by: David Daney <david.daney@cavium.com>
Tested-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
i2c_bus_type may contain both I2C clients and I2C adapters. Fix
of_find_i2c_device_by_node to call i2c_verify_client to ensure that it
only returns non-NULL of I2C clients.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
clk_{un}prepare is mandatory for platforms using common clock framework. Since
this driver is used by SPEAr platform, which supports common clock framework,
add clk_{un}prepare() support for designware i2c.
Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
This patch adds in support for standby/S2R/hybernate for i2c-designware driver.
Signed-off-by: Deepak Sikri <deepak.sikri@st.com>
Signed-off-by: Rajeev Kumar <rajeev-dlh.kumar@st.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
The platform is removed, so there are no users of this driver.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
This patch adds device tree support to the pnx-i2c driver by using platform
resources for memory region and irq and removing dependency on mach includes.
The following platforms are affected:
* PNX
* LPC31xx (WIP)
* LPC32xx
The patch is based on a patch by Jon Smirl, working on lpc31xx integration
Signed-off-by: Roland Stigge <stigge@antcom.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
cppcheck rightfully says:
drivers/i2c/busses/i2c-eg20t.c:266: style: The function 'ktime_lt' is never used
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
Cc: Tomoya MORINAGA <tomoya.rohm@gmail.com>
smatch says:
drivers/i2c/busses/i2c-eg20t.c:702 pch_i2c_xfer() info: why not propagate 'ret' from mutex_lock_interruptible() instead of -512?
which is especially true since for -ENORESTARTSYS it is said in
linux/errno.h "signal_pending() MUST be set" which is not done here. So
just pass on the return value we got.
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
Cc: Tomoya MORINAGA <tomoya.rohm@gmail.com>
By previous patch, pch_i2c_wait_for_xfer_complete can be merged
to pch_i2c_wait_for_check_xfer.
Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Currently, there are the same code for xfer complete check processing.
So, I add helper function pch_i2c_wait_for_check_xfer.
Reported-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
When entering deep sleep, the value in the registers I2CFDR and
I2CDFSRR are lost. This causes I2C access to fail after resuming.
Add suspend/resume routines to save/restore the registers
I2CFDR and I2CDFSRR.
Signed-off-by: Zhao Chenhui <chenhui.zhao@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
This patch enables DT support for the IIC driver
used on SH-based SoCs such as sh7722 and sh7724
among others as well as SH-Mobile SoCs such as
sh7367, sh7377, sh7372, sh73a0 and r8a7740.
Tested with out-of-tree DT support code on the
sh7372 Mackerel board.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
The platforms using i2c-pnx.c both defined a duplicated i2c.h (used nowhere
else). This patch removes those and integrates the contents into the driver
itself.
Signed-off-by: Roland Stigge <stigge@antcom.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
As a precondition for device tree conversion, the platforms using i2c-pnx.c are
converted to using mem and irq resources instead of platform data.
Signed-off-by: Roland Stigge <stigge@antcom.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
The STM SPEAr platform can only access the i2c controller register
via 16bit read/write functions. This patch adds support to
automatically detect this 16bit access mode.
Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Commit 488bf314b ("i2c: Allow i2c_add_numbered_adapter() to assign a
bus id") reworked i2c_add_numbered_adapter() to call i2c_add_adapter()
if requested bus was -1.
This allows to simplify driver's initialization procedure by using
just one function for static and dynamic adapter id registration.
This patch updates few more drivers (missed out in original patch)
to use this functionality.
Signed-off-by: Karol Lewandowski <k.lewandowsk@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Commit 488bf314b ("i2c: Allow i2c_add_numbered_adapter() to assign a
bus id") reworked i2c-pxa driver leaving obsolete comment.
This commit simply drops it.
Signed-off-by: Karol Lewandowski <k.lewandowsk@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Use standard of_match_ptr() to avoid defining variable unused
in non device tree builds.
Signed-off-by: Karol Lewandowski <k.lewandowsk@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
This is a last minute bug fix that was only just noticed since the code
path that's being exercised here is one that is fairly rarely used. The
changelog for the change itself is extremely clear and the code itself
is obvious to inspection so should be pretty safe.
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Merge tag 'regmap-3.4' into regmap-stride
regmap: Last minute bug fix for 3.4
This is a last minute bug fix that was only just noticed since the code
path that's being exercised here is one that is fairly rarely used. The
changelog for the change itself is extremely clear and the code itself
is obvious to inspection so should be pretty safe.
Conflicts:
drivers/base/regmap/regmap.c (overlap between the fix and stride code)
Since we only need to clock AIF2 when it's actively in use start up the
FLL for it using a supply widget which supplies AIF2CLK. This both makes
the sequencing more robust and ensures we minimise power consumption.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Add devicetree based initialization support for TI tps65910 regulators.
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
da903x_list_voltage does not return correct voltage for da9030 ldo14.
Implement da9030_list_ldo14_voltage to return correct voltage for da9030 ldo14.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Update the driver to use all the regmap based helpers, saving a nice chunk
of code (especially for the DCDCs).
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Only the alive LDOs can actually use this as all the other regulators have
two linear ranges.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
A lot of regulator hardware maps selectors on to voltages with a simple
linear mapping function
selector = base + (selector * step size)
Provide off the shelf list_voltage() and map_voltage() operations which
use new min_uV and uV_step members in the regulator_desc to implement
this function.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
In order to allow more drivers to factor things out into data allow
drivers to provide a mapping function to convert voltages into selectors.
This allows any driver to use set_voltage_sel(). The existing mapping
based on iterating over list_voltage() is provided as an operation which
can be assigned to the new map_voltage() function though for ease of
transition it is treated as the default.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
