user/sven/linux.git/include/linux/i2c.h, branch v6.1.110

i2c: Use IS_REACHABLE() for substituting empty ACPI functions

2024-09-08T05:53:13Z

commit 71833e79a42178d8a50b5081c98c78ace9325628 upstream. Replace IS_ENABLED() with IS_REACHABLE() to substitute empty stubs for: i2c_acpi_get_i2c_resource() i2c_acpi_client_count() i2c_acpi_find_bus_speed() i2c_acpi_new_device_by_fwnode() i2c_adapter *i2c_acpi_find_adapter_by_handle() i2c_acpi_waive_d0_probe() commit f17c06c6608a ("i2c: Fix conditional for substituting empty ACPI functions") partially fixed this conditional to depend on CONFIG_I2C, but used IS_ENABLED(), which is wrong since CONFIG_I2C is tristate. CONFIG_ACPI is boolean but let's also change it to use IS_REACHABLE() to future-proof it against becoming tristate. Somehow despite testing various combinations of CONFIG_I2C and CONFIG_ACPI we missed the combination CONFIG_I2C=m, CONFIG_ACPI=y. Signed-off-by: Richard Fitzgerald Fixes: f17c06c6608a ("i2c: Fix conditional for substituting empty ACPI functions") Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202408141333.gYnaitcV-lkp@intel.com/ Reviewed-by: Takashi Iwai Signed-off-by: Wolfram Sang Signed-off-by: Greg Kroah-Hartman

i2c: Fix conditional for substituting empty ACPI functions

2024-09-08T05:52:59Z

[ Upstream commit f17c06c6608ad4ecd2ccf321753fb511812d821b ] Add IS_ENABLED(CONFIG_I2C) to the conditional around a bunch of ACPI functions. The conditional around these functions depended only on CONFIG_ACPI. But the functions are implemented in I2C core, so are only present if CONFIG_I2C is enabled. Signed-off-by: Richard Fitzgerald Signed-off-by: Wolfram Sang Signed-off-by: Sasha Levin

i2c: add fwnode APIs

2024-06-21T12:35:40Z

[ Upstream commit 373c612d72461ddaea223592df31e62c934aae61 ] Add fwnode APIs for finding and getting I2C adapters, which will be used by the SFP code. These are passed the fwnode corresponding to the adapter, and return the I2C adapter. It is the responsibility of the caller to find the appropriate fwnode. We keep the DT and ACPI interfaces, but where appropriate, recode them to use the fwnode interfaces internally. Reviewed-by: Mika Westerberg Signed-off-by: Russell King (Oracle) Signed-off-by: Wolfram Sang Stable-dep-of: 3f858bbf04db ("i2c: acpi: Unbind mux adapters before delete") Signed-off-by: Sasha Levin

i2c: Make remove callback return void

2022-08-16T10:46:26Z

The value returned by an i2c driver's remove function is mostly ignored. (Only an error message is printed if the value is non-zero that the error is ignored.) So change the prototype of the remove function to return no value. This way driver authors are not tempted to assume that passing an error to the upper layer is a good idea. All drivers are adapted accordingly. There is no intended change of behaviour, all callbacks were prepared to return 0 before. Reviewed-by: Peter Senna Tschudin Reviewed-by: Jeremy Kerr Reviewed-by: Benjamin Mugnier Reviewed-by: Javier Martinez Canillas Reviewed-by: Crt Mori Reviewed-by: Heikki Krogerus Acked-by: Greg Kroah-Hartman Acked-by: Marek Behún # for leds-turris-omnia Acked-by: Andy Shevchenko Reviewed-by: Petr Machata # for mlxsw Reviewed-by: Maximilian Luz # for surface3_power Acked-by: Srinivas Pandruvada # for bmc150-accel-i2c + kxcjk-1013 Reviewed-by: Hans Verkuil # for media/* + staging/media/* Acked-by: Miguel Ojeda # for auxdisplay/ht16k33 + auxdisplay/lcd2s Reviewed-by: Luca Ceresoli # for versaclock5 Reviewed-by: Ajay Gupta # for ucsi_ccg Acked-by: Jonathan Cameron # for iio Acked-by: Peter Rosin # for i2c-mux-*, max9860 Acked-by: Adrien Grassein # for lontium-lt8912b Reviewed-by: Jean Delvare # for hwmon, i2c-core and i2c/muxes Acked-by: Corey Minyard # for IPMI Reviewed-by: Vladimir Oltean Acked-by: Dmitry Torokhov Acked-by: Sebastian Reichel # for drivers/power Acked-by: Krzysztof Hałasa Signed-off-by: Uwe Kleine-König Signed-off-by: Wolfram Sang

i2c: extend documentation about retvals of master_xfer functions

2022-07-26T21:13:36Z

It was stated how the error codes should be. It was not stated what the regular case should return. Add this. Signed-off-by: Wolfram Sang Signed-off-by: Wolfram Sang

i2c: add tracepoints for I2C slave events

2022-03-19T23:11:05Z

I2C slave events tracepoints can be enabled by: echo 1 > /sys/kernel/tracing/events/i2c_slave/enable and logs in /sys/kernel/tracing/trace will look like: ... i2c_slave: i2c-0 a=010 ret=0 WR_REQ [] ... i2c_slave: i2c-0 a=010 ret=0 WR_RCV [02] ... i2c_slave: i2c-0 a=010 ret=0 WR_RCV [0c] ... i2c_slave: i2c-0 a=010 ret=0 STOP [] ... i2c_slave: i2c-0 a=010 ret=0 RD_REQ [04] ... i2c_slave: i2c-0 a=010 ret=0 RD_PRO [b4] ... i2c_slave: i2c-0 a=010 ret=0 STOP [] formatted as: i2c- a= ret= <- callback return value [] trace printings can be selected by adding a filter like: echo adapter_nr==1 >/sys/kernel/tracing/events/i2c_slave/filter Signed-off-by: Jae Hyun Yoo Signed-off-by: Wolfram Sang

i2c: acpi: Add i2c_acpi_new_device_by_fwnode() function

2021-12-13T10:44:47Z

Change i2c_acpi_new_device() into i2c_acpi_new_device_by_fwnode() and add a static inline wrapper providing the old i2c_acpi_new_device() behavior. This is necessary because in some cases we may only have access to the fwnode / acpi_device and not to the matching physical-node struct device *. Suggested-by: Andy Shevchenko Reviewed-by: Andy Shevchenko Acked-by: Mika Westerberg Acked-by: Wolfram Sang Signed-off-by: Hans de Goede Link: https://lore.kernel.org/r/20211203102857.44539-4-hdegoede@redhat.com

i2c: Allow an ACPI driver to manage the device's power state during probe

2021-11-03T18:03:55Z

Enable drivers to tell ACPI that there's no need to power on a device for probe. Drivers should still perform this by themselves if there's a need to. In some cases powering on the device during probe is undesirable, and this change enables a driver to choose what fits best for it. Add a field called "flags" into struct i2c_driver for driver flags, and a flag I2C_DRV_ACPI_WAIVE_D0_PROBE to tell a driver supports probe in ACPI D states other than 0. Signed-off-by: Sakari Ailus Reviewed-by: Tomasz Figa Acked-by: Wolfram Sang Signed-off-by: Rafael J. Wysocki

i2c: acpi: Add an i2c_acpi_client_count() helper function

2021-08-12T15:26:24Z

We have 3 files now which have the need to count the number of I2cSerialBus resources in an ACPI-device's resource-list. Currently all implement their own helper function for this, add a generic helper function to replace the 3 implementations. Signed-off-by: Hans de Goede Link: https://lore.kernel.org/r/20210803160044.158802-2-hdegoede@redhat.com Acked-by: Mika Westerberg Acked-by: Wolfram Sang

Merge tag 'staging-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

2021-07-05T21:01:53Z

Pull staging / IIO driver updates from Greg KH: "Here is the big set of IIO and staging driver patches for 5.14-rc1. Loads of IIO driver updates and additions in here, the shortlog has the full details. For the staging side, we moved a few drivers out of staging, and deleted the kpc2000 drivers as the original developer asked us to because no one was working on them anymore. Also in here are loads of coding style cleanups due to different intern projects focusing on the staging tree to try to get experience doing kernel development. All of these have been in the linux-next tree for a while with no reported problems" * tag 'staging-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (744 commits) staging: hi6421-spmi-pmic: cleanup some macros staging: hi6421-spmi-pmic: change identation of a table staging: hi6421-spmi-pmic: change a return code staging: hi6421-spmi-pmic: better name IRQs staging: hi6421-spmi-pmic: use devm_request_threaded_irq() staging: hisilicon,hi6421-spmi-pmic.yaml: cleanup descriptions spmi: hisi-spmi-controller: move driver from staging phy: phy-hi3670-usb3: move driver from staging into phy staging: rtl8188eu: remove include/rtw_debug.h header staging: rtl8188eu: remove GlobalDebugLevel variable staging: rtl8188eu: remove DRIVER_PREFIX preprocessor definition staging: rtl8188eu: remove RT_TRACE macro staging: rtl8188eu: remove all RT_TRACE calls from hal/rtl8188eu_recv.c staging: rtl8188eu: remove all RT_TRACE calls from hal/hal_intf.c staging: rtl8188eu: remove all RT_TRACE calls from hal/rtl8188eu_xmit.c staging: rtl8188eu: remove all RT_TRACE calls from core/rtw_xmit.c staging: rtl8188eu: remove all RT_TRACE calls from core/rtw_pwrctrl.c staging: rtl8188eu: remove all RT_TRACE calls from core/rtw_recv.c staging: rtl8188eu: remove all RT_TRACE calls from core/rtw_ioctl_set.c staging: rtl8188eu: remove all RT_TRACE calls from core/rtw_ieee80211.c ...