Commit Graph

534680 Commits

Author SHA1 Message Date
York Sun
b3fdd32799 i2c: mux: Add register-based mux i2c-mux-reg
Based on i2c-mux-gpio driver, similarly the register-based mux
switch from one bus to another by setting a single register.
The register can be on PCIe bus, local bus, or any memory-mapped
address. The endianness of such register can be specified in device
tree if used, or in platform data.

Signed-off-by: York Sun <yorksun@freescale.com>
Acked-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-24 14:05:18 +02:00
Wolfram Sang
7a59b00a09 i2c: dt: describe generic bindings
Start a new file which describes the generic bindings used for I2C with
device tree. So we have a central place to look for them, increase
visibility of them, and hopefully reduce the amount of custom properties
introduced.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-24 14:05:17 +02:00
Wolfram Sang
c6909d6f6f i2c: slave: print warning if slave flag not set
Address collisions will be rare, but we should let the user know that
slaves have their own address space nonetheless.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-24 14:05:16 +02:00
Wolfram Sang
cfa0327b0d i2c: support 10 bit and slave addresses in sysfs 'new_device'
We now have seperate address spaces for 10 bit and we-are-slave clients.
Update the sysfs device instantiation method to support these types by
accepting the address offsets that are assigned to the extra address
spaces. Update the documentation, too.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-24 14:05:15 +02:00
Wolfram Sang
9bccc70a12 i2c: take address space into account when checking for used addresses
It is not enough to compare the plain address value, we also need to
check the flags enabling a different address space. E.g. it is valid to
have address 0x50 as a 7-bit address and 0x050 as 10-bit address on the
same bus. Same for addresses when we are the slave.

Tested-by: Andrey Danin <danindrey@mail.ru>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-24 14:05:14 +02:00
Wolfram Sang
b4e2f6ac12 i2c: apply DT flags when probing
Check for slave and 10-bit flags when probing and mark the client when
found. Improve the address validity check, too

Tested-by: Andrey Danin <danindrey@mail.ru>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-24 14:05:14 +02:00
Wolfram Sang
c4019b7040 i2c: make address check indpendent from client struct
We want to use this function with struct boardinfo soon, so let's just
pass the parameters really needed. We also extend the type of addr, so
more types can be input. Remove a superfluous dangling comment while
here.

Tested-by: Andrey Danin <danindrey@mail.ru>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-24 14:05:13 +02:00
Wolfram Sang
66be6056eb i2c: rename address check functions
The current naming is based on the arguments of the functions and not on
what they do. Even I as the maintainer find this confusing, so let's
rename them to something more descriptive.

Tested-by: Andrey Danin <danindrey@mail.ru>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-24 14:05:12 +02:00
Wolfram Sang
da899f55b3 i2c: apply address offset for slaves, too
We want a separate address range for being an I2C slave. Add an offset
of 0x1000, so it can be combined with ten bit addresses as well. Add a
separate function to create the address value, we will need it later in
other places.

Tested-by: Andrey Danin <danindrey@mail.ru>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-24 14:05:11 +02:00
Wolfram Sang
c5ebb387f4 i2c: add a flag to mark clients as slaves
And update indentation with one more tab, sigh...

Tested-by: Andrey Danin <danindrey@mail.ru>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-24 14:05:10 +02:00
Wolfram Sang
f5005f7835 dt-bindings: add header for generic I2C flags in bindings
Tested-by: Andrey Danin <danindrey@mail.ru>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-24 14:05:09 +02:00
Eddie Huang
28c0a8433d i2c: mediatek: Fixup i2c ack error interrupt handling
When occur i2c ack error, i2c controller generate two interrupts,
first is the ack error interrupt, then the complete interrupt.
i2c interrupt handler should keep the two interrupt value, and only
call complete() for the complete interrupt.

Signed-off-by: Liguo Zhang <liguo.zhang@mediatek.com>
Signed-off-by: Eddie Huang <eddie.huang@mediatek.com>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-11 16:54:47 +02:00
Eddie Huang
ea89ef1f7b i2c: mediatek: Reset DMA engine in hardware init function
Reset DMA in hardware init function to avoid unknown hardware state
before do any I2C operation.

Signed-off-by: Liguo Zhang <liguo.zhang@mediatek.com>
Signed-off-by: Eddie Huang <eddie.huang@mediatek.com>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-11 16:53:11 +02:00
Colin Ian King
66621f96c9 i2c: viperboard: clean up inconsistent indenting
Minor clean up of indenting, no functional change

Signed-off-by: Colin Ian King <colin.king@canonical.com>
[wsa: squashed two lines into one]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:38 +02:00
Masahiro Yamada
a1f64317bb i2c: cadence: set THIS_MODULE to the owner of the adapter
The owner of the adapter is missing, while this driver is tristate.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:38 +02:00
Wolfram Sang
6e24d205a8 hwmon: ina209: move binding docs to proper place
The I2C dir is not for I2C client devices! Move it to the proper folder.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Guenter Roeck <linux@roeck-us.net>
2015-08-10 08:37:38 +02:00
Wolfram Sang
8113627c3f hwmon: ina2xx: move binding docs to proper place
The I2C dir is not for I2C client devices! Move it to the proper folder.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Guenter Roeck <linux@roeck-us.net>
2015-08-10 08:37:37 +02:00
Wolfram Sang
220c04f834 hwmon: max6697: move binding docs to proper place
The I2C dir is not for I2C client devices! Move it to the proper folder.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Guenter Roeck <linux@roeck-us.net>
2015-08-10 08:37:37 +02:00
Wolfram Sang
301b06f80f rtc: bq32k: move binding docs to proper place
The I2C dir is not for I2C client devices! Move it to the proper folder.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Pavel Machek <pavel@denx.de>
2015-08-10 08:37:37 +02:00
Javier Martinez Canillas
c49c1f0873 misc: eeprom: Export I2C module alias information in missing drivers
The I2C core always reports the MODALIAS uevent as "i2c:<client name>"
regardless if the driver later is match using the I2C id_table or the
of_match_table. So the driver needs to export the I2C table and this
be built into the module or udev won't have the necessary information
to auto load the correct module when the device is added.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:36 +02:00
Jarkko Nikula
fb427466dc i2c: designware: Make debug print in i2c_dw_isr() shorter
Printing adapter name is irrelevant from this debug print and makes output
needlessly long. Having already device and functions names printed here is
enough for debugging.

While at it remove extra space from "enabled= 0x" and use "%#x" for
printing "0x" prefixed hexadecimal values.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
[wsa: made it a oneliner]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:36 +02:00
Vladimir Zapolskiy
0d1ad98dd8 i2c: arb-gpio-challenge: use of_get_i2c_adapter_by_node interface
This change is needed to properly lock I2C parent bus driver.

Prior to this change i2c_put_adapter() is misused, which may lead
to an overflow over zero of I2C bus driver user counter.

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:36 +02:00
Vladimir Zapolskiy
48e9743dd6 i2c: core: add and export of_get_i2c_adapter_by_node() interface
of_find_i2c_adapter_by_node() call requires quite often missing
put_device(), and i2c_put_adapter() releases a device locked by
i2c_get_adapter() only. In general module_put(adapter->owner) and
put_device(dev) are not interchangeable.

This is a common error reproduction scenario as a result of the
misusage described above (for clearness this is run on iMX6 platform
with HDMI and I2C bus drivers compiled as kernel modules):

    root@mx6q:~# lsmod | grep i2c
    i2c_imx                10213  0
    root@mx6q:~# lsmod | grep dw_hdmi_imx
    dw_hdmi_imx             3631  0
    dw_hdmi                11846  1 dw_hdmi_imx
    imxdrm                  8674  3 dw_hdmi_imx,imx_ipuv3_crtc,imx_ldb
    drm_kms_helper        113765  5 dw_hdmi,imxdrm,imx_ipuv3_crtc,imx_ldb
    root@mx6q:~# rmmod dw_hdmi_imx
    root@mx6q:~# lsmod | grep i2c
    i2c_imx                10213  -1

                                 ^^^^^

    root@mx6q:~# rmmod i2c_imx
    rmmod: ERROR: Module i2c_imx is in use

To fix existing users of these interfaces and to avoid any further
confusion and misusage in future, add one more interface
of_get_i2c_adapter_by_node(), it is similar to i2c_get_adapter() in
sense that an I2C bus device driver found and locked by user can be
correctly unlocked by i2c_put_adapter().

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:36 +02:00
Vladimir Zapolskiy
611e12ea0f i2c: core: manage i2c bus device refcount in i2c_[get|put]_adapter
In addition to module_get()/module_put() add get_device()/put_device()
calls into i2c_get_adapter()/i2c_put_adapter() exported
interfaces. This is done to lock I2C bus device, if it is in use by a
client.

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:35 +02:00
Krzysztof Kozlowski
141124e6e0 misc: Drop owner assignment from i2c_driver
i2c_driver does not need to set an owner because i2c_register_driver()
will set it.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:35 +02:00
Krzysztof Kozlowski
069d5b745b i2c: Drop owner assignment from i2c_driver
i2c_driver does not need to set an owner because i2c_register_driver()
will set it.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:35 +02:00
Andy Shevchenko
b0898fdaff i2c: designware-pci: use IRQF_COND_SUSPEND flag
The mentioned flag fixes a warning on Intel Edison board since one of the I2C
controller shares IRQ line with watchdog timer.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:35 +02:00
Denis Carikli
8ab7f089ec DT: i2c: Add ADS7828 and ADS7830 to list of trivial devices
This adds devicetree documentation for the bindings of the
ads7828 driver.

Signed-off-by: Denis Carikli <denis@eukrea.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:34 +02:00
Ondrej Zary
82cd5d041c i2c: parport: Add VCT-jig adapter
Add support for VCT-jig parallel port I2C adapter to i2c-parport.

The adapter schematic can be found here (in the RAR file):
http://remont-aud.net/shop/22/desc/vct-jig-komplekt-dlja-samostojatelnoj-sborki

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:34 +02:00
Anurag Kumar Vulisha
63cab195bf i2c: removed work arounds in i2c driver for Zynq Ultrascale+ MPSoC
Cadence 1.0 version has bugs which have been fixed in the cadence 1.4 version.
This patch removes the quirks present in the driver for cadence 1.4 version.

Signed-off-by: Anurag Kumar Vulisha <anuragku@xilinx.com>
[wsa: fixed indentation issues in r1p10_i2c_def]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:34 +02:00
Laxman Dewangan
d57f5dedde i2c: tegra: add support for fast plus (FM+) mode clock rate
Tegra I2C controller required to configure the clock divisor
register inside controller to different value based on the clock
speed. The recommended clock divisor for the I2C controller for
standard/fast mode is 0x19 and for fast-mode plus is 0x10.

Add support to configure clock divisor register of I2C controller
based on bus clock rate.

This clock divisor is supported form T114 onwards.

Signed-off-by: Chaitanya Bandi <bandik@nvidia.com>
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:33 +02:00
Laxman Dewangan
6f4664b2e2 i2c: tegra: update CONFIG_LOAD for new conifiguration
Once the new configuration is set on the conifg register of
I2C controller, it is require to update the CONFIG_LOAD register
to transfer the new SW configuration to actual HW internal
registers that would be used in the actual logic.

It is like, SW is programming only shadow registers through
regular configuration and when these load_config bit fields
are set to 1, it causes the regular/shadows registers
configuration transferred to the HW internal active registers.
So SW has to set these bit fields at the end of all regular
registers configuration. And these config_load bits are HW
auto-clear bits. HW clears these bit fields once the register
configuration is moved to HW internal active registers. So SW
has to wait until these bits are auto-cleared before going
for any further programming

This mechanism is supported on T124 and after this SoCs.

Signed-off-by: Chaitanya Bandi <bandik@nvidia.com>
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:33 +02:00
Wolfram Sang
77441ac00d i2c: omap: fix cleanup regression
Patch "i2c: omap: abolish variable name confusion" triggered a
coccinelle warning which we fix here:

drivers/i2c/busses/i2c-omap.c:1333:5-24: pm_runtime_get_sync returns < 0 as error. Unecessary IS_ERR_VALUE at line 1334

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:33 +02:00
Shubhrajyoti Datta
6b0c8dc310 i2c: xiic: Do not continue in case of errors in Rx
In case of error conditions like Arbitration lost or NACK lets signal
the waiting process.

Handle error cases in the Rx path

Signed-off-by: Shubhrajyoti Datta <shubhraj@xilinx.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:33 +02:00
Shubhrajyoti Datta
7f9906bd7f i2c: xiic: Service all interrupts in isr
Currently only one interrupt is serviced in the isr.
In case the multiple interrupts happen simultenously we service and ack
only one of them. Check for all the causes in the isr and service them.

Signed-off-by: Shubhrajyoti Datta <shubhraj@xilinx.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:32 +02:00
Shubhrajyoti Datta
542e2a9b73 i2c: xiic: Remove the Addressed as slave interrupt
Currently there is no slave mode support in the driver
also in the isr we just ack it and do nothing.
So disable the AAS interrupt.

Signed-off-by: Shubhrajyoti Datta <shubhraj@xilinx.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:32 +02:00
Shubhrajyoti Datta
b33aa25278 i2c: xiic: Remove busy loop while waiting for bus busy
Remove the busy loop  while waiting for bus busy.
Instead let the processor sleep.

Signed-off-by: Shubhrajyoti Datta <shubhraj@xilinx.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:32 +02:00
Shubhrajyoti Datta
e6c9a037bc i2c: xiic: Remove the disabling of interrupts
Currently before every transfer the interrupts are disabled.
So incase the slave nacks in the middle of the transfer the
current transfer is not aborted. Upon enabling the interrupts
conditions like NACK , arbitration lost will not be masked.
Remove the disabling of the interrupts.

Signed-off-by: Shubhrajyoti Datta <shubhraj@xilinx.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:32 +02:00
Shubhrajyoti Datta
d701667bb3 i2c: xiic: Do not reset controller before every transfer
Currently before every transfer the controller is reinitialised.
We are already resetting the controller upon errors so upon every
transfer is a performance kill.
Remove the same.

Signed-off-by: Shubhrajyoti Datta <shubhraj@xilinx.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:31 +02:00
Shubhrajyoti Datta
fcc2fac60a i2c: xiic: move the xiic_process to thread context
The xiic_process is a 154 line code that runs in isr context currently
move it to thread context. Also the name xiic_process suggests that the
intension was to run in process context.

Signed-off-by: Shubhrajyoti Datta <shubhraj@xilinx.com>
[wsa: initialized irqreturn_t to IRQ_NONE instead of IRQ_HANDLED]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:31 +02:00
Shubhrajyoti Datta
0387fc1645 i2c: xiic: Remove the disabling of interrupts
Currently the interrupts are disabled at the start of the
isr and enabled at the end of the isr. Remove the same.

In case the slave device NACKs the transaction while in the isr
the transfer will continue and the NACK interrupt will arrive
only after the isr is serviced.

Signed-off-by: Shubhrajyoti Datta <shubhraj@xilinx.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:31 +02:00
Vaibhav Hiremath
51fcce86a7 i2c: pxa: Use devm_ variants in probe function
This patch cleans up i2c_pxa_probe() function,

 - Use devm_ variants wherever
   This will clean both probe exit and i2c_pxa_remove() functions

 - Check platform resource before parsing any other data from DT/platform

 - Use dev_err on failure from i2c_add_numbered_adapter()

 - Use pr_info instead of printk for KERN_INFO

Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
[wsa: removed unneeded error prinout after devm_ioremap_resource]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:31 +02:00
Vaibhav Hiremath
3a2dc1677b i2c: pxa: Update debug function to dump more info on error
Update i2c_pxa_scream_blue_murder() fn to print more information
in case of error.
Also, use dev_err variants instead of printk.

Signed-off-by: Jett.Zhou <jtzhou@marvell.com>
Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Cc: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:30 +02:00
Yipeng Yao
e2b498fd55 i2c: pxa: Fix compile warning in 64bit mode
Fix below warning message, coming from 64 bit toolchain.

drivers/i2c/busses/i2c-pxa.c:1237:15:
warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]

Signed-off-by: Yipeng Yao <ypyao@marvell.com>
[vaibhav.hiremath@linaro.org: Updated Changelog]
Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Cc: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:30 +02:00
Shouming Wang
8bd75bd303 i2c: pxa: Return I2C_RETRY when timeout in pio mode
In case of timeout in pio mode of operation return I2C_RETRY.
This behavior will be same as interrupt mode of operation.

Signed-off-by: Shouming Wang <wangshm@marvell.com>
[vaibhav.hiremath@linaro.org: Updated changelog]
Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:30 +02:00
Vaibhav Hiremath
e087b4272e i2c: pxa: No need to set slave addr for i2c master mode reset
Normally i2c controller works as master, so slave addr is not needed, or
it will impact some slave device (eg. ST NFC chip) i2c accesses, because
it has the same i2c address with controller.

For example,
On the pxa1928 based platform, where PMIC (88pm860) is present @0x30
address on TWSI0 interface, and if we set 0x30 as a slave address in
pxa1928 TWSI0 module, all the transactions towards PMIC would go for toss.

Signed-off-by: Jett.Zhou <jtzhou@marvell.com>
Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:29 +02:00
Leilei Shang
abf8a1fba9 i2c: pxa: keep i2c irq ON in suspend
During suspend there may still be some i2c access happening, as the
interrupt is shared between multiple drivers.
And if we don't keep i2c irq ON, there may be i2c access timeout if
i2c is in irq mode of operation.

Signed-off-by: Raul Xiong <xjian@marvell.com>
Signed-off-by: Xiaofan Tian <tianxf@marvell.com>
[vaibhav.hiremath@linaro.org: updated Changelog]
Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Cc: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:29 +02:00
Wolfram Sang
5faf6e1f58 i2c: emev2: add driver
Add a basic driver for the Renesas EMEV2 SoC. Based on the driver from
the BSP which was first worked on by Ian, and made ready for upstream by
me.

Signed-off-by: Ian Molton <ian.molton@codethink.co.uk>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:29 +02:00
Wolfram Sang
e1069878b9 clk: shmobile: emev2: deassert reset for IIC0/1
We have a driver now for IIC, so disable reset for them.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:29 +02:00
Felipe Balbi
1c4828f916 i2c: omap: on ->remove() call pm_runtime_put_sync()
we're about to remove the module, so we can't
really schedule a PM transition in the future,
we must wait for it to finish.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-10 08:37:28 +02:00