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path: root/drivers/i2c
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2014-06-17i2c: sun6-p2wi: fix call to snprintfBoris BREZILLON1-1/+1
Fixes possible issue in case pdev name contains formatting characters. Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com> Reported-by: Kees Cook <keescook@google.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-13i2c: rk3x: add NULL entry to the end of_device_id arrayDan Carpenter1-0/+1
drivers/i2c/busses/i2c-rk3x.c:610:69-70: rk3x_i2c_match is not NULL terminated at line 610 Make sure of_device_id tables are NULL terminated Generated by: /kbuild/src/linux/scripts/coccinelle/misc/of_table.cocci Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-13i2c: sun6i-p2wi: use proper return value in probeWolfram Sang1-1/+1
Fixes: >> drivers/i2c/busses/i2c-sun6i-p2wi.c:243:10: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized] Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-12i2c: sunxi: add P2WI (Push/Pull 2 Wire Interface) controller supportBoris BREZILLON3-0/+359
The P2WI controller looks like an SMBus controller which only supports byte data transfers. But, it differs from standard SMBus protocol on several aspects: - it supports only one slave device, and thus drop the address field - it adds a parity bit every 8bits of data - only one read access is required to read a byte (instead of a write followed by a read access in standard SMBus protocol) - there's no Ack bit after each byte transfer This means this bus cannot be used to interface with standard SMBus devices (the only known device to support this interface is the AXP221 PMIC). However the P2WI protocol is close enough to SMBus to be integrated in the I2C subsystem (see this thread [1] for detailed reasons that led to integrating this driver in the I2C subsystem). [1] http://www.spinics.net/lists/linux-i2c/msg15066.html Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-12i2c: rk3x: add driver for Rockchip RK3xxx SoC I2C adapterMax Schwarz3-0/+773
Driver for the native I2C adapter found in Rockchip RK3xxx SoCs. Configuration is only possible through devicetree. The driver is interrupt driven and supports the I2C_M_IGNORE_NAK mangling bit. Signed-off-by: Max Schwarz <max.schwarz@online.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-06Merge branch 'i2c/for-next' of ↵Linus Torvalds32-1280/+447
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux into next Pull i2c updates from Wolfram Sang: "I2C has the following updates for 3.16: - major cleanups to the rcar and sh_mobile drivers - removal of nuc900 driver which had a compile error for years - usual bunch of driver updates, bugfixes and cleanups" * 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (44 commits) i2c: pca954x: Fix compilation without CONFIG_GPIOLIB i2c: mux: pca954x: Use the descriptor-based GPIO API i2c: mpc: insert DR read in i2c_fixup() i2c: bfin: turn to Resource-managed API in probe function i2c: Make of_device_id array const i2c: remove unnecessary OOM messages i2c: designware-pci: Add Haswell PCI IDs i2c: designware: Add runtime PM hooks i2c: designware: Disable device on system suspend i2c: nuc900: remove driver i2c: imx: update i2c clock divider for each transaction i2c: imx: fix the i2c bus hang issue when do repeat restart i2c: rcar: update copyright and license information i2c: rcar: janitorial cleanup after refactoring i2c: rcar: reuse status bits as enable bits i2c: rcar: remove spinlock i2c: rcar: refactor status bit handling i2c: rcar: refactor setting up msg i2c: rcar: check bus free before first message i2c: rcar: refactor irq state machine ...
2014-06-05i2c: pca954x: Fix compilation without CONFIG_GPIOLIBLaurent Pinchart1-2/+1
The pca954x driver recently switched to the GPIO descriptor API without including the correct <linux/gpio/consumer.h> header. This breaks compilation without CONFIG_GPIOLIB. drivers/i2c/muxes/i2c-mux-pca954x.c: In function ‘pca954x_probe’: drivers/i2c/muxes/i2c-mux-pca954x.c:204:2: error: implicit declaration of function ‘devm_gpiod_get’ [-Werror=implicit-function-declaration] gpio = devm_gpiod_get(&client->dev, "reset"); ^ drivers/i2c/muxes/i2c-mux-pca954x.c:204:7: warning: assignment makes pointer from integer without a cast [enabled by default] gpio = devm_gpiod_get(&client->dev, "reset"); ^ drivers/i2c/muxes/i2c-mux-pca954x.c:206:3: error: implicit declaration of function ‘gpiod_direction_output’ [-Werror=implicit-function-declaration] gpiod_direction_output(gpio, 0); ^ cc1: some warnings being treated as errors make[3]: *** [drivers/i2c/muxes/i2c-mux-pca954x.o] Error 1 Fix it by including the right header. Reported-by: Jim Davis <jim.epost@gmail.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-03i2c: mux: pca954x: Use the descriptor-based GPIO APILaurent Pinchart1-16/+5
The ID-based GPIO API pushes handling of GPIO polarity to drivers. Simplify the driver by switching to the descriptor-based GPIO API. This also fixes a mismatch between the pca954x DT bindings that document a "reset-gpios" property and the driver that requests a "reset-gpio" property. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-03i2c: mpc: insert DR read in i2c_fixup()Valentin Longchamp1-1/+1
The mpc_i2c_fixup function is called when the bus is not released by a slave. The function generates 9 pulses that should lead the slave to release the bus. The sequence that generates the pulses disables/enables the I2C module that controls the blocked bus. We have found out on the P2041 SoC that this could cause the CPU to hang (for a short delay). To avoid this, this patch introduces a read to the I2CDR register between the re-enablement of the I2C module in master mode and its returning to the slave mode instead of the delay (the final delay, between the pulses is kept), as proposed in procedure from the P2041 reference manual (16.6.2.3), and the other manuals from the mpc83xx and mpc85xx families. Signed-off-by: Rainer Boschung <rainer.boschung@keymile.com> Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-03i2c: bfin: turn to Resource-managed API in probe functionSonic Zhang1-32/+12
No need to free managed resources any more. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-03i2c: ChromeOS EC tunnel driverDoug Anderson3-0/+328
On ARM Chromebooks we have a few devices that are accessed by both the AP (the main "Application Processor") and the EC (the Embedded Controller). These are: * The battery (sbs-battery). * The power management unit tps65090. On the original Samsung ARM Chromebook these devices were on an I2C bus that was shared between the AP and the EC and arbitrated using some extranal GPIOs (see i2c-arb-gpio-challenge). The original arbitration scheme worked well enough but had some downsides: * It was nonstandard (not using standard I2C multimaster) * It only worked if the EC-AP communication was I2C * It was relatively hard to debug problems (hard to tell if i2c issues were caused by the EC, the AP, or some device on the bus). On the HP Chromebook 11 the design was changed to: * The AP/EC comms were still i2c, but the battery/tps65090 were no longer on the bus used for AP/EC communication. The battery was exposed to the AP through a limited i2c tunnel and tps65090 was exposed to the AP through a custom Linux driver. On the Samsung ARM Chromebook 2 the scheme is changed yet again, now: * The AP/EC comms are now using SPI for faster speeds. * The EC's i2c bus is exposed to the AP through a full i2c tunnel. The upstream "tegra124-venice2" uses the same scheme as the Samsung ARM Chromebook 2, though it has a different set of components on the other side of the bus. This driver supports the scheme used by the Samsung ARM Chromebook 2. Future patches to this driver could add support for the battery tunnel on the HP Chromebook 11 (and perhaps could even be used to access tps65090 on the HP Chromebook 11 instead of using a special driver, but I haven't researched that enough). Signed-off-by: Vincent Palatin <vpalatin@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Doug Anderson <dianders@chromium.org> Reviewed-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-06-02i2c: Make of_device_id array constJingoo Han5-5/+5
Make of_device_id array const, because all OF functions handle it as const. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Peter Korsgaard <peter@korsgaard.com> Acked-by: Maxime Coquelin <maxime.coquelin@st.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02i2c: remove unnecessary OOM messagesJingoo Han15-44/+14
The site-specific OOM messages are unnecessary, because they duplicate the MM subsystem generic OOM message. For example, k.alloc and v.alloc failures use dump_stack(). Signed-off-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Jean Delvare <jdelvare@suse.de> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Felipe Balbi <balbi@ti.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02i2c: designware-pci: Add Haswell PCI IDsMika Westerberg1-0/+22
Intel Haswell has the same I2C host controller than Baytrail and it can also be enumerated as a PCI device. Add the PCI IDs to the driver list. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02i2c: designware: Add runtime PM hooksMika Westerberg1-7/+5
It is possible that after entering runtime PM suspend the controller context is lost due the fact that its power is removed. This happens for example on Asus T100, an Intel Baytrail based tablet/laptop. In order to get the controller back to functional state, we need to implement runtime PM hooks which will re-initialize the hardware during runtime PM resume. We can re-use the existing system suspend hooks as the steps to resume/suspend the controller are the same. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02i2c: designware: Disable device on system suspendMika Westerberg1-0/+1
Userspace can initiate system suspend on arbitrary times which means that device drivers must make sure that their device gets quiesced before system suspend is entered. Therefore disable the I2C host controller in the driver system suspend hook. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02i2c: nuc900: remove driverWolfram Sang3-717/+0
Arnd said in another patch: "As far as I can tell, this driver must have produced this error for as long as it has been merged into the mainline kernel, but it was never part of the normal build tests: drivers/i2c/busses/i2c-nuc900.c: In function 'nuc900_i2c_probe': drivers/i2c/busses/i2c-nuc900.c:601:17: error: request for member 'apbfreq' in something not a structure or union ret = (i2c->clk.apbfreq)/(pdata->bus_freq * 5) - 1; ^ This is an attempt to get the driver to build and possibly work correctly, although I do wonder whether we should just remove it, as it has clearly never worked." I agree with removing it since nobody showed interest in Arnd's fixup patch. Reported-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Cc: Wan ZongShun <mcuos.com@gmail.org> Acked-by: Arnd Bergmann <arnd@arndb.de>
2014-06-02i2c: imx: update i2c clock divider for each transactionFugang Duan1-44/+49
Since IMX serial SOCs support low bus freq mode, some clocks freq may change to save power. I2C needs to check the clock source and update the divider. For example: i.MX6SL I2C clk is from IPG_PERCLK which is sourced from IPG_CLK. Under normal operation, IPG_CLK is 66MHz, ipg_perclk is at 22MHz. In low bus freq mode, IPG_CLK is at 12MHz and IPG_PERCLK is down to 4MHz. So the I2C driver must update the divider register for each transaction when the current IPG_PERCLK is not equal to the clock of previous transaction. Signed-off-by: Fugang Duan <B38611@freescale.com> [wsa: removed an outdated comment and simplified debug output] Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02i2c: imx: fix the i2c bus hang issue when do repeat restartFugang Duan1-11/+30
Test i2c device Maxim max44009, datasheet is located at: http://www.maximintegrated.com/datasheet/index.mvp/id/7175 The max44009 support repeat operation like: read -> repeat restart -> read/write The current i2c imx host controller driver don't support this operation that causes i2c bus hang due to "MTX" is cleared in .i2c_imx_read(). If "read" is the last message there have no problem, so the current driver supports all SMbus operation like: write -> repeat restart -> read/write IMX i2c controller for master receiver has some limitation: - If it is the last byte for one operation, it must generate STOP signal before read I2DR to prevent controller from generating another clock cycle. - If it is the last byte in the read, and then do repeat restart, it must set "MTX" before read I2DR to prevent controller from generating another extra clock cycle. The patch is to fix the issue. Signed-off-by: Fugang Duan <B38611@freescale.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02i2c: rcar: update copyright and license informationWolfram Sang1-8/+6
Make clear that the driver is GPL v2 only. Remove FSF address. Remove filename in comment. Update copyright information. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02i2c: rcar: janitorial cleanup after refactoringWolfram Sang1-45/+5
Remove some obvious comments, remove some superfluous debug output (the error code carries the same information), some white space fixing... Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02i2c: rcar: reuse status bits as enable bitsWolfram Sang1-13/+4
Status register and enable register are identical regarding their layout. Use the bit definitions for both. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02i2c: rcar: remove spinlockWolfram Sang1-22/+0
The i2c core has per-adapter locks, so no need to protect again. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02i2c: rcar: refactor status bit handlingWolfram Sang1-13/+7
The old macros made it harder to see what was actually happening. Replace them with something more readable. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02i2c: rcar: refactor setting up msgWolfram Sang1-25/+5
Setting up a read or write message is similar enough to be done in one function. Also, move a helper function into the new function since it is only used here. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02i2c: rcar: check bus free before first messageWolfram Sang1-11/+5
We should always check if the bus is free, independently if it is a read or write. It should be done before the first message, though. After that, we ourselves keep the bus busy. Remove a 'ret' assignment which only silenced a build warning. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02i2c: rcar: refactor irq state machineWolfram Sang1-32/+7
Remove the seperate functions and use designated constants. As readable but less overhead. Actually, this is even more readable since the old function used a mix of "=" and "|=". Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02i2c: rcar: refactor bus state machineWolfram Sang1-27/+10
Remove the seperate functions and use designated constants. As readable but less overhead. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02i2c: rcar: no need to store irq numberWolfram Sang1-5/+4
We use devm, so irq number is only needed during probe. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02i2c: rcar: not everything needs to be a functionWolfram Sang1-11/+3
Very basic operations, just called once, can also go to the caller. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02i2c: sh_mobile: add compatibles for additional SoCWolfram Sang1-0/+3
Signed-off-by: Wolfram Sang <wsa@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-06-02i2c: rcar: add compatibles for additional SoCWolfram Sang1-0/+3
Signed-off-by: Wolfram Sang <wsa@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-05-22i2c: gpio: Use devm_gpio_request()Jingoo Han1-18/+7
Use devm_gpio_request() to make cleanup paths simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Reviewed-by: Violeta Menendez <violeta.menendez@codethink.co.uk> Reviewed-by: Ian Molton <ian.molton@codethink.co.uk> Tested-by: Violeta Menendez <violeta.menendez@codethink.co.uk> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-05-22i2c: eg20t: Fix Kconfig dependenciesJean Delvare1-1/+1
The i2c-eg20t driver is for a companion chip to the Intel Atom E600 series processors. These are 32-bit x86 processors so the driver is only needed on X86_32. Add COMPILE_TEST as an alternative, so that the driver can still be build-tested elsewhere. Signed-off-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-05-22i2c: sh_mobile: fix clock calculation for newer SoCsWolfram Sang1-10/+38
Newer SoCs have so fast input clocks that the ICCL/H registers only count every second clock to have a meaningful 9-bit range. The driver was already prepared for that happening, but didn't use it so far. Add the proper DT configuration for SoCs that need it. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-05-22i2c: sh_mobile: check timing parameters for valid rangeWolfram Sang1-4/+13
Due to misconfiguration, it can happen that the calculated timing parameters are out of range. Bail out if that happens. We can also simplify some logic later because of the verified value. Also, make the printouts of the values more precise by adding the hex-prefixes. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-05-22i2c: sh_mobile: bail out on errors when initializingWolfram Sang1-5/+7
sh_mobile_i2c_init() could detect wrong settings, but didn't bail out, so it would continue unconfigured. Fix this. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-05-22i2c: sh_mobile: remove superfluous offset parameterWolfram Sang1-9/+6
Following the KISS principle, remove unneeded stuff. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-05-22i2c: sh_mobile: devm conversion, irq setupWolfram Sang1-41/+15
This is what devm was made for. No rollback mechanism needed, remove the hook parameter from the irq setup function and simplify it. While we are here change some variables to proper types. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-05-22i2c: sh_mobile: devm conversion, low hanging fruitsWolfram Sang1-31/+10
Convert the easy parts to devm. irqs will be converted in a seperate patch to keep diffs readable. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-05-22i2c: sh_mobile: honor DT bus speed settingsWolfram Sang1-1/+4
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-05-22i2c: sh_mobile: improve error handlingWolfram Sang1-16/+9
Use standard i2c error codes for i2c failures. Also, don't print something on timeout since it happens regularly with i2c. Simplify some, logic, too. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-05-22i2c: sh_mobile: replace magic hex values with constantsWolfram Sang1-5/+6
No functional change, binaries are identical. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-05-22i2c: exynos5: add support for HSI2C on Exynos5260 SoCNaveen Krishna Ch1-12/+55
HSI2C module on Exynos5260 differs from current modules in following ways: 1. HSI2C on Exynos5260 has fifo_depth of 16bytes 2. Module needs to be reset as a part of init sequence. Hence, Following changes are involved. 1. Add a new compatible string and Updates the Documentation dt bindings. 2. Introduce a variant struct to support the changes in H/W 3. Reset the module during init. Thus, bringing the module back to default state irrespective of what firmware did with it. Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com> Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-05-22i2c: ali1563: fix checkpatch.pl issuesRichard Leitner1-37/+45
Fixed most checkpatch.pl issues Signed-off-by: Richard Leitner <me@g0hl1n.net> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-05-22i2c: nomadik: Fixup system suspendUlf Hansson1-7/+7
For !CONFIG_PM_RUNTIME, the device were never put back into active state while resuming. For CONFIG_PM_RUNTIME, we blindly trusted the device to be inactive while we were about to handle it at suspend late, which is just too optimistic. Even if the driver uses pm_runtime_put_sync() after each tranfer to return it's runtime PM resources, there are no guarantees this will actually mean the device will inactivated. The reason is that the PM core will prevent runtime suspend during system suspend, and thus when a transfer occurs during the early phases of system suspend the device will be kept active after the transfer. To handle both issues above, use pm_runtime_force_suspend|resume() from the system suspend|resume callbacks. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-05-22i2c: imx: add SMBus block read supportKaushal Butala1-3/+28
The smbus block read is not currently supported for imx i2c devices. This patchset adds the support to imx i2c bus so that blocks of data can be read using SMbus block reads.(using i2c_smbus_read_block_data() function from the i2c_core.c.). Tested with 3.10.9 kernel. Reviewed-by: Shawn Guo <shawn.guo@freescale.com> Signed-off-by: Kaushal Butala <kaushalkernelmailinglist@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-05-22i2c: mv64xxx: Change i2c compatibles for sunxiMaxime Ripard1-1/+1
The Allwinner A10 compatibles were following a slightly different compatible patterns than the rest of the SoCs for historical reasons. Move to the other pattern for consistency across all Allwinner Socs. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> [wsa: dropped binding OK as per http://lists.infradead.org/pipermail/linux-arm-kernel/2014-February/229438.html] Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-05-14i2c: rcar: bail out on zero length transfersWolfram Sang1-1/+8
This hardware does not support zero length transfers. Instead, the driver does one (random) byte transfers currently with undefined results for the slaves. We now bail out. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Cc: stable@kernel.org
2014-05-14i2c: qup: Fix pm_runtime_get_sync usageAndy Gross1-1/+1
This patch corrects the error check on the call to pm_runtime_get_sync. Signed-off-by: Andy Gross <agross@codeaurora.org> Reviewed-by: Ivan T. Ivanov <iivanov@mm-sol.com> Acked-by: Bjorn Andersson <bjorn.andersson@sonymobile.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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