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 <sakari.ailus@linux.intel.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Acked-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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
...
If I2C is not compiled, there is no way we should see a call to
i2c_verify_client() on a device that is an i2c client. As such,
provide a stub to return NULL to resolve an associated build failure.
The build is failing with this link error
ld: fxls8962af-core.o: in function `fxls8962af_fifo_transfer':
fxls8962af-core.c: undefined reference to `i2c_verify_client'
Reported-by: Tom Rix <trix@redhat.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Fixes: af959b7b96 ("iio: accel: fxls8962af: fix errata bug E3 - I2C burst reads")
Reviewed-by: Sean Nyekjaer <sean@geanix.com>
Acked-by: Wolfram Sang <wsa@kernel.org>
Link: https://lore.kernel.org/r/20210603165835.3594557-1-jic23@kernel.org
Although in the most platforms, the bus power of i2c
are alway on, some platforms disable the i2c bus power
in order to meet low power request.
We can control bulk regulator if it is provided in i2c
adapter device.
Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
More and more drivers rely on devres to manage their resources, however
if bus' probe() and release() methods are not trivial and control some
of resources as well (for example enable or disable clocks, or attach
device to a power domain), we need to make sure that driver-allocated
resources are released immediately after driver's remove() method
returns, and not postponed until driver core gets around to releasing
resources. To fix that we open a new devres group before calling
driver's probe() and explicitly release it when we return from driver's
remove().
Tested-by: Jeff LaBundy <jeff@labundy.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Some I2C controller drivers will only unregister the I2C
adapter in their .remove() callback, which can be done
by simply using a managed variant to add the I2C adapter.
So add the managed functions for adding the I2C adapter.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This makes it possible for the drivers to assign complete
software fwnodes to the devices instead of only the device
properties in those nodes.
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This quirk signifies that the adapter cannot do a repeated
START, it always issues a STOP condition after transfers.
Suggested-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Bence Csókás <bence98@sch.bme.hu>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Pull i2c updates from Wolfram Sang:
- bus recovery can now be given a pinctrl handle and the I2C core will
do all the steps to switch to/from GPIO which can save quite some
boilerplate code from drivers
- "fallthrough" conversion
- driver updates, mostly ID additions
* 'i2c/for-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (32 commits)
i2c: iproc: fix race between client unreg and isr
i2c: eg20t: use generic power management
i2c: eg20t: Drop PCI wakeup calls from .suspend/.resume
i2c: mediatek: Fix i2c_spec_values description
i2c: mediatek: Add i2c compatible for MediaTek MT8192
dt-bindings: i2c: update bindings for MT8192 SoC
i2c: mediatek: Add access to more than 8GB dram in i2c driver
i2c: mediatek: Add apdma sync in i2c driver
i2c: i801: Add support for Intel Tiger Lake PCH-H
i2c: i801: Add support for Intel Emmitsburg PCH
i2c: bcm2835: Replace HTTP links with HTTPS ones
Documentation: i2c: dev: 'block process call' is supported
i2c: at91: Move to generic GPIO bus recovery
i2c: core: treat EPROBE_DEFER when acquiring SCL/SDA GPIOs
i2c: core: add generic I2C GPIO recovery
dt-bindings: i2c: add generic properties for GPIO bus recovery
i2c: rcar: avoid race when unregistering slave
i2c: tegra: Avoid tegra_i2c_init_dma() for Tegra210 vi i2c
i2c: tegra: Fix runtime resume to re-init VI I2C
i2c: tegra: Fix the error path in tegra_i2c_runtime_resume
...
Multiple I2C bus drivers use similar bindings to obtain information needed
for I2C recovery. For example, for platforms using device-tree, the
properties look something like this:
&i2c {
...
pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_i2c_default>;
pinctrl-1 = <&pinctrl_i2c_gpio>;
sda-gpios = <&pio 0 GPIO_ACTIVE_HIGH>;
scl-gpios = <&pio 1 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
...
}
For this reason, we can add this common initialization in the core. This
way, other I2C bus drivers will be able to support GPIO recovery just by
providing a pointer to platform's pinctrl and calling i2c_recover_bus()
when SDA is stuck low.
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
[wsa: inverted one logic for better readability, minor update to kdoc]
Signed-off-by: Wolfram Sang <wsa@kernel.org>
All i2c_new_device-alike functions return ERR_PTR these days, but this
fallback function was missed.
Fixes: 2dea645ffc ("i2c: acpi: Return error pointers from i2c_acpi_new_device()")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
[wsa: changed from 'ENOSYS' to 'ENODEV']
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This manually reverts commit d1d84bb953.
The only user has gone two years ago with commit 589edb56b4 ("ACPI /
scan: Create platform device for INT33FE ACPI nodes") and no new user
has showed up. Remove and hope we will never need it again.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
All in-tree users have been converted to the new i2c_new_client_device
function, so remove this deprecated one.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
