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path: root/drivers/i2c/busses
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2017-04-21i2c: thunderx: Enable HWMON class probingJan Glauber
Set I2C_CLASS_HWMON to enable automatic probing of BMC devices by the ipmi-ssif driver. Signed-off-by: Jan Glauber <jglauber@cavium.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-04-21i2c: rcar: clarify PM handling with more commentsWolfram Sang
PM handling is correct but might be a bit subtle. Add some comments for clarification. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-04-21i2c: rcar: fix resume by always initializing registers before transferWolfram Sang
Resume failed because of uninitialized registers. Instead of adding a resume callback, we simply initialize registers before every transfer. This lightweight change is more robust and will keep us safe if we ever need support for power domains or dynamic frequency changes. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-04-21i2c: tegra: fix spelling mistake: "contoller" -> "controller"Colin Ian King
trivial fix to spelling mistake in MODULE_DESCRIPTION text Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-04-21i2c: exynos5: use core helper to get driver dataAndrzej Hajda
Driver core provides of_device_get_match_data which can be used to get driver data instead of custom helper. Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com> Tested-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-04-21i2c: exynos5: de-duplicate error logs on clock setupAndrzej Hajda
In case of clock setup error it is enough to log it once. Moreover patch simplifies clock setup routines. Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com> Tested-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-04-21i2c: exynos5: simplify clock frequency handlingAndrzej Hajda
There is no need to keep separate settings for high and fast speed clock. Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com> Tested-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-04-21i2c: exynos5: simplify timings calculationAndrzej Hajda
Instead of using cryptic loop direct calculation of timings can be used. Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Tested-by: Javier Martinez Canillas <javier@osg.samsung.com> Reviewed-by: Andi Shyti <andi.shyti@samsung.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-04-19i2c: designware-baytrail: fix potential null pointer dereference on devColin Ian King
The assignment to addr requires a call to get_sem_addr that dereferences dev, however, this dereference occurs before a null pointer check on dev. Move this assignment after the null check on dev to avoid a potential null pointer dereference. Detected by CoverityScan, CID#1419700 ("Dereference before null check") Fixes: fd476fa22a1f432 ("i2c: designware-baytrail: Add support for cherrytrail") Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-04-19i2c: designware: Get selected speed mode sda-hold-time via ACPIchin.yew.tan@intel.com
Sda-hold-time is an important parameter for tuning i2c to meet the electrical specification especially for high speed. I2C with incorrect sda-hold-time may cause lost arbitration error. Instead of loading all speed mode settings, only selected speed mode settings are loaded. Signed-off-by: Tan Chin Yew <chin.yew.tan@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-04-16i2c: img-scb: use setup_timerGeliang Tang
Use setup_timer() instead of init_timer() to simplify the code. Signed-off-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-04-16i2c: i2c-scmi: add a MS HIDEdgar Cherkasov
Description of the problem: - i2c-scmi driver contains only two identifiers "SMBUS01" and "SMBUSIBM"; - the fist HID (SMBUS01) is clearly defined in "SMBus Control Method Interface Specification, version 1.0": "Each device must specify 'SMBUS01' as its _HID and use a unique _UID value"; - unfortunately, BIOS vendors (like AMI) seem to ignore this requirement and implement "SMB0001" HID instead of "SMBUS01"; - I speculate that they do this because only "SMB0001" is hard coded in Windows SMBus driver produced by Microsoft. This leads to following situation: - SMBus works out of box in Windows but not in Linux; - board vendors are forced to add correct "SMBUS01" HID to BIOS to make SMBus work in Linux. Moreover the same board vendors complain that tools (3-rd party ASL compiler) do not like the "SMBUS01" identifier and produce errors. So they need to constantly patch the compiler for each new version of BIOS. As it is very unlikely that BIOS vendors implement a correct HID in future, I would propose to consider whether it is possible to work around the problem by adding MS HID to the Linux i2c-scmi driver. v2: move the definition of the new HID to the driver itself. Signed-off-by: Edgar Cherkasov <echerkasov@dev.rtsoft.ru> Signed-off-by: Michael Brunner <Michael.Brunner@kontron.com> Acked-by: Viktor Krasnov <vkrasnov@dev.rtsoft.ru> Reviewed-by: Jean Delvare <jdelvare@suse.de> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-30i2c: meson: improve and simplify interrupt handlerHeiner Kallweit
The preceding changes in this patch series now allow to simplify the interrupt handler significantly. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-30i2c: meson: remove meson_i2c_write_tokensHeiner Kallweit
meson_i2c_write_tokens is always called directly after meson_i2c_prepare_xfer (and only then). So we can simplify the code by removing meson_i2c_write_tokens and moving the two statements of meson_i2c_write_tokens to the end of meson_i2c_prepare_xfer. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-30i2c: meson: don't create separate token chain just for the stop commandHeiner Kallweit
We can directly add the stop token to the token chain including the last transfer chunk. This is more efficient than creating a separate token chain just for the stop command. And it allows us to get rid of state STATE_STOP completely. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-30i2c: meson: improve interrupt handler and detect spurious interruptsHeiner Kallweit
If state is STATE_IDLE no interrupt should occur. Return IRQ_NONE if such a spurious interrupt is detected. Not having to take care of STATE_IDLE later in the interrupt handler allows to further simplify the interrupt handler in subsequent patches of this series. In addition move resetting REG_CTRL_START bit to the start of the interrupt handler to ensure that the start bit is always reset. Currently the start bit is not reset for STATE_STOP because i2c->state is set to STATE_IDLE. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-30i2c: meson: remove variable count from meson_i2c_xferHeiner Kallweit
Variable count has always the same value as i, so we don't need it. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-30i2c: meson: use full 12 bits for clock dividerHeiner Kallweit
The clock divider has 12 bits, splitted into a 10 bit field and a 2 bit field. The extra 2 bits aren't used currently. Change this to use the full 12 bits and warn if the requested frequency is too low. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Acked-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-30i2c: meson: use i2c core for DT clock-frequency parsingHeiner Kallweit
We don't have to parse the DT manually to retrieve the bus frequency and we don't have to maintain an own default for the bus frequency. Let the i2c core do this for us. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Reviewed-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-30i2c: meson: set clock divider in probe instead of setting it for each transferHeiner Kallweit
The bus frequency is fixed to what is set DT, therefore we can set the clock divider in probe already and we don't have to set it for each transfer. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-30i2c: meson: remove member irq from struct meson_i2cHeiner Kallweit
Member irq can be replaced with a local variable in probe because it's nowhere else accessed. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Reviewed-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-30i2c: meson: use min instead of min_t where min_t isn't neededHeiner Kallweit
Use min instead of min_t where min_t isn't needed. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-23i2c: thunderx: ACPI support for clock settingsJan Glauber
Add support for reading the system clock and the TWSI clock frequency from ACPI DSDT. TWSI clock was already covered by using device_property_read(). Signed-off-by: Jan Glauber <jglauber@cavium.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-23i2c: xlp9xx: update for ARCH_THUNDER2Jayachandran C
ARCH_VULCAN arm64 platform (for Broadcom Vulcan ARM64 processors) has been discontinued. Cavium's ThunderX2 CN99XX (ARCH_THUNDER2) will be the next revision of the platform. Update compile dependencies and ACPI ID to reflect this change. There is not need to retain ARCH_VULCAN since the Vulcan processor was never in production and the config option will be removed soon. Signed-off-by: Jayachandran C <jnair@caviumnetworks.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-23i2c: mv64xxx: simplify optional reset handlingPhilipp Zabel
As of commit bb475230b8e5 ("reset: make optional functions really optional"), the reset framework API calls use NULL pointers to describe optional, non-present reset controls. This allows to return errors from devm_reset_control_get_optional and to call reset_control_(de)assert unconditionally. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-23i2c: tegra-bpmp: Enable Tegra BPMP I2C adapterJon Hunter
Enable the Tegra BPMP I2C adapter by default if the Tegra BPMP itself is enabled. This adapter is used as the I2C interface for the PMIC on the Tegra186 Jetson-TX2 platform. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-22i2c: designware: Disable pm for PMIC i2c-bus even if there is no _SEM methodHans de Goede
Cherrytrail devices use the dw i2c-bus with uid 7 to access their PMIC. Even if the i2c-bus to the PMIC is not shared with the SoC's P-Unit and i2c-designware-baytrail.c thus does not set the pm_disabled flag, we still need to disable pm so that ACPI PMIC opregions can access the PMIC during late-suspend and early-resume. This fixes errors like these blocking suspend: i2c_designware 808622C1:06: timeout waiting for bus ready ACPI Exception: AE_ERROR, Returned by Handler for [UserDefinedRegion] acpi 80860F14:02: Failed to change power state to D3hot PM: late suspend of devices failed Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-22i2c: designware: Never suspend i2c-busses used for accessing the system PMICHans de Goede
Currently we are already setting a pm_runtime_disabled flag and disabling runtime-pm for i2c-busses used for accessing the system PMIC on x86. But this is not enough, there are ACPI opregions which may want to access the PMIC during late-suspend and early-resume, so we need to completely disable pm to be safe. This commit renames the flag from pm_runtime_disabled to pm_disabled and adds the following new behavior if the flag is set: 1) Call dev_pm_syscore_device(dev, true) which disables normal suspend / resume and remove the pm_runtime_disabled check from dw_i2c_plat_resume since that will now never get called. This fixes suspend_late handlers which use ACPI PMIC opregions causing errors like these: PM: Suspending system (freeze) PM: suspend of devices complete after 1127.751 msecs i2c_designware 808622C1:06: timeout waiting for bus ready ACPI Exception: AE_ERROR, Returned by Handler for [UserDefinedRegion] acpi 80860F14:02: Failed to change power state to D3hot PM: late suspend of devices failed 2) Set IRQF_NO_SUSPEND irq flag. This fixes resume_early handlers which handlers which use ACPI PMIC opregions causing errors like these: PM: resume from suspend-to-idle i2c_designware 808622C1:06: controller timed out ACPI Exception: AE_ERROR, Returned by Handler for [UserDefinedRegion] Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-22i2c-designware: increase timeout of semaphore transferOliver Neukum
Our testing shows the semaphore failing to be transferred on CherryTrail in about 0.5% of all cases. The existing timeout needs to be lengthened to accommodate the worst cases. V2: Rebased on https://cgit.freedesktop.org/drm-intel/commit/?h=topic/designware-baytrail Signed-off-by: Oliver Neukum <oneukum@suse.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-22Merge tag 'topic/designware-baytrail-2017-03-02' of ↵Wolfram Sang
git://anongit.freedesktop.org/git/drm-intel into i2c/for-next Pull immutable branch as a common base for further development: "Baytrail PMIC vs. PMU race fixes from Hans de Goede This time the right version (v4), with the compile fix."
2017-03-09i2c: exynos5: Avoid transaction timeouts due TRANSFER_DONE_AUTO not setJavier Martinez Canillas
After commit 7999eecb7e56 ("i2c: exynos5: fix arbitration lost handling"), some I2C transactions are failing because the TRANSFER_DONE_AUTO field is not set in the I2C_TRANS_STATUS register so the i2c->status value is left to -EINVAL causing the i2c->msg_complete completion to never be signaled. For example, when reading the time of an I2C rtc on an Exynos5800 machine: $ cat /sys/class/rtc/rtc0/time [ 25.924594] exynos5-hsi2c 12e10000.i2c: rx timeout [ 65.028365] max77686-rtc max77802-rtc: Fail to read time reg(-22) cat: /sys/class/rtc/rtc0/time: Invalid argument The Exynos5422 manual states clearly that most I2C_TRANS_STATUS reg bits (including TRANSFER_DONE_AUTO) are cleared after the register is read. So reading has side effects and should only be done if HSI2C_INT_I2C was set. Fixes: 7999eecb7e56 ("i2c: exynos5: fix arbitration lost handling") Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-08i2c: designware: add reset interfaceZhangfei Gao
Some platforms like hi3660 need do reset first to allow accessing registers Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Tested-by: Ramiro Oliveira <ramiro.oliveira@synopsys.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-08i2c: meson: fix wrong variable usage in meson_i2c_put_dataHeiner Kallweit
Most likely a copy & paste error. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Acked-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Fixes: 30021e3707a7 ("i2c: add support for Amlogic Meson I2C controller")
2017-03-08i2c: m65xx: drop superfluous quirk structureWolfram Sang
All length fields in Linux I2C are u16, so a HW length limitation of 16 bit lengths is not a limitation. Remove the quirk structure. Tested-by: Jun Gao <jun.gao@mediatek.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-08i2c: brcmstb: Fix START and STOP conditionsJaedon Shin
The BSC data buffers to send and receive data are each of size 32 bytes or 8 bytes 'xfersz' depending on SoC. The problem observed for all the combined message transfer was if length of data transfer was a multiple of 'xfersz' a repeated START was being transmitted by BSC driver. Fixed this by appropriately setting START/STOP conditions for such transfers. Fixes: dd1aa2524bc5 ("i2c: brcmstb: Add Broadcom settop SoC i2c controller driver") Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com> Acked-by: Kamal Dasu <kdasu.kdev@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-08i2c: riic: fix restart conditionChris Brandt
While modifying the driver to use the STOP interrupt, the completion of the intermediate transfers need to wake the driver back up in order to initiate the next transfer (restart condition). Otherwise you get never ending interrupts and only the first transfer sent. Fixes: 71ccea095ea1 ("i2c: riic: correctly finish transfers") Reported-by: Simon Horman <horms@verge.net.au> Signed-off-by: Chris Brandt <chris.brandt@renesas.com> Tested-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-03-02i2c: designware-baytrail: Call pmic_bus_access_notifier_chainHans de Goede
Call the iosf_mbi pmic_bus_access_notifier_chain on bus acquire / release. BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=155241 Signed-off-by: Hans de Goede <hdegoede@redhat.com> Tested-by: tagorereddy <tagore.chandan@gmail.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20170210102802.20898-11-hdegoede@redhat.com
2017-03-02i2c: designware-baytrail: Acquire P-Unit access on bus acquireHans de Goede
Acquire P-Unit access to stop others from accessing the P-Unit while the PMIC i2c bus is in use. This is necessary because accessing the P-Unit from the kernel may result in the P-Unit trying to access the PMIC i2c bus, which results in a hang when it happens while we own the PMIC i2c bus semaphore. BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=155241 Signed-off-by: Hans de Goede <hdegoede@redhat.com> Tested-by: tagorereddy <tagore.chandan@gmail.com> Acked-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20170210102802.20898-10-hdegoede@redhat.com
2017-03-02i2c: designware-baytrail: Add support for cherrytrailHans de Goede
The cherrytrail punit has the pmic i2c bus access semaphore at a different register address. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Takashi Iwai <tiwai@suse.de> Tested-by: Takashi Iwai <tiwai@suse.de> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Acked-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20170210102802.20898-9-hdegoede@redhat.com
2017-03-02i2c: designware-baytrail: Fix race when resetting the semaphoreHans de Goede
Use iosf_mbi_modify instead of iosf_mbi_read + iosf_mbi_write so that we keep the iosf_mbi_lock locked during the read-modify-write done to reset the semaphore. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Acked-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20170210102802.20898-8-hdegoede@redhat.com
2017-03-02i2c: designware-baytrail: Disallow the CPU to enter C6 or C7 while holding ↵Hans de Goede
the punit semaphore On my cherrytrail tablet with axp288 pmic, just doing a bunch of repeated reads from the pmic, e.g. "i2cdump -y 14 0x34" would lookup the tablet in 1 - 3 runs guaranteed. This seems to be causes by the cpu trying to enter C6 or C7 while we hold the punit bus semaphore, at which point everything just hangs. Avoid this by disallowing the CPU to enter C6 or C7 before acquiring the punit bus semaphore. BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=109051 Signed-off-by: Hans de Goede <hdegoede@redhat.com> Tested-by: Takashi Iwai <tiwai@suse.de> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Acked-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20170210102802.20898-7-hdegoede@redhat.com
2017-03-02i2c: designware-baytrail: Only check iosf_mbi_available() for shared hostsHans de Goede
If (!shared_host) simply return 0, this avoids delaying the probe if iosf_mbi_available() returns false when an i2c bus is not using the punit semaphore. Also move the if (!iosf_mbi_available()) check to above the dev_info, so that we do not repeat the dev_info on every probe until iosf_mbi_available() returns true. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Tested-by: Takashi Iwai <tiwai@suse.de> Acked-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20170210102802.20898-6-hdegoede@redhat.com
2017-03-02i2c: designware-baytrail: Pass dw_i2c_dev into helper functionsHans de Goede
Pass dw_i2c_dev into the helper functions, this is a preparation patch for the punit semaphore fixes done in the other patches in this set. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Takashi Iwai <tiwai@suse.de> Tested-by: Takashi Iwai <tiwai@suse.de> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Acked-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20170210102802.20898-5-hdegoede@redhat.com
2017-03-02i2c: designware: Rename accessor_flags to flagsHans de Goede
Rename accessor_flags to flags, so that we can use the field for other flags too. This is a preparation patch for adding cherrytrail support to the punit semaphore code. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Tested-by: Takashi Iwai <tiwai@suse.de> Acked-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20170210102802.20898-4-hdegoede@redhat.com
2017-03-02sched/headers: Prepare to move signal wakeup & sigpending methods from ↵Ingo Molnar
<linux/sched.h> into <linux/sched/signal.h> Fix up affected files that include this signal functionality via sched.h. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-02-25Merge branch 'i2c/for-4.11' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c updates from Wolfram Sang: "I2C has for you two new drivers (Tegra BPMP and STM32F4), interrupt support for pca954x muxes, and a bunch of driver bugfixes and improvements. Nothing really special this cycle. A few commits have been added to my tree just recently. Those are the Tegra BPMP driver and a few straightforward bugfixes or cleanups which I prefer to have upstream rather soonish. The rest had proper linux-next exposure" * 'i2c/for-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (25 commits) i2c: thunderx: Replace pci_enable_msix() i2c: exynos5: fix arbitration lost handling i2c: exynos5: disable fifo-almost-empty irq signal when necessary i2c: at91: ensure state is restored after suspending i2c: bcm2835: Avoid possible NULL ptr dereference i2c: Add Tegra BPMP I2C proxy driver dt-bindings: Add Tegra186 BPMP I2C binding misc: eeprom: at24: use device_property_*() functions instead of of_get_property() i2c: mux: pca954x: Add interrupt controller support dt: bindings: i2c-mux-pca954x: Add documentation for interrupt controller i2c: mux: pca954x: Add missing pca9542 definition to chip_desc i2c: riic: correctly finish transfers i2c: i801: Add support for Intel Gemini Lake i2c: mux: pca9541: Export OF device ID table as module aliases i2c: mux: pca954x: Export OF device ID table as module aliases i2c: mux: mlxcpld: remove unused including <linux/version.h> i2c: busses: constify i2c_algorithm structures i2c: i2c-mux-gpio: rename i2c-gpio-mux to i2c-mux-gpio i2c: sh_mobile: document support for r8a7796 (R-Car M3-W) i2c: i2c-cros-ec-tunnel: Reduce logging noise ...
2017-02-23i2c: thunderx: Replace pci_enable_msix()Jan Glauber
Using pci_alloc_irq_vectors() instead of the deprecated pci_enable_msix() allows to remove the msix_entry from struct octeon_i2c and thus to get rid of the config symbol check. Signed-off-by: Jan Glauber <jglauber@cavium.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-02-23i2c: exynos5: fix arbitration lost handlingAndrzej Hajda
In case of arbitration lost adequate interrupt sometimes is not signaled. As a result transfer timeouts and is not retried, as it should. To avoid such cases code is added to check transaction status in case of every interrupt. Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Tested-by: Andi Shyti <andi.shyti@samsung.com> Reviewed-by: Andi Shyti <andi.shyti@samsung.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-02-23i2c: exynos5: disable fifo-almost-empty irq signal when necessaryAndrzej Hajda
Fifo-almost-empty irq signal should be disabled as soon as possible, to avoid unnecessary interrupt storm. The best moment is when there is no more data to feed fifo. This patch fixes system stalls caused by IRQ storm. Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Tested-by: Andi Shyti <andi.shyti@samsung.com> Reviewed-by: Andi Shyti <andi.shyti@samsung.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-02-20i2c: at91: ensure state is restored after suspendingAlexandre Belloni
When going to suspend, the I2C registers may be lost because the power to VDDcore is cut. Restore them when resuming. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
generated by cgit (git 2.34.1) at 2025-05-30 09:02:21 +0000