The X-Powers AXP20X PMIC exposes the current current and voltage
measures via an internal ADC.

This adds the possibility to read IIO channels directly for processed
values rather than reading the registers and computing the value.

For backward compatibility purpose, if the IIO driver is not compiled,
this driver will fall back on previous behaviour which is direct
register readings.
Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

If the driver is built as a module, I2C module alias information is not
filled so the module won't be autoloaded. Export the I2C and OF devices
ID to the module by using the MODULE_DEVICE_TABLE() macro.

Before this patch:

$ modinfo drivers/power/supply/max14656_charger_detector.ko | grep alias
$

After this patch:

$ modinfo drivers/power/supply/max14656_charger_detector.ko | grep alias
alias:          i2c:max14656
alias:          of:N*T*Cmaxim,max14656C*
alias:          of:N*T*Cmaxim,max14656
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

acpi_match_device can potentially return NULL, so it is prudent to
check if acpi_id is null before it is dereferenced.  Add a check
and an error message to indicate the failure.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

Add breathing room in probe() out* section.
Signed-off-by: Liam Breck <kernel@networkimprov.net>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

Reading both fault and status registers and logging any fault should
take priority over handling status register update.

Fix by moving the status handling to later in interrupt routine.

Fixes: d7bf353f ("bq24190_charger: Add support for TI BQ24190 Battery Charger")
Signed-off-by: Liam Breck <kernel@networkimprov.net>
Acked-by: Mark Greer <mgreer@animalcreek.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

Caching the fault register after a single I2C read may not keep an accurate
value.

Fix by doing two reads in irq_handle_thread() and using the cached value
elsewhere. If a safety timer fault later clears itself, we apparently don't get
an interrupt (INT), however other interrupts would refresh the register cache.

From the data sheet: "When a fault occurs, the charger device sends out INT
 and keeps the fault state in REG09 until the host reads the fault register.
 Before the host reads REG09 and all the faults are cleared, the charger
 device would not send any INT upon new faults. In order to read the
 current fault status, the host has to read REG09 two times consecutively.
 The 1st reads fault register status from the last read [1] and the 2nd reads
 the current fault register status."

[1] presumably a typo; should be "last fault"

Fixes: d7bf353f ("bq24190_charger: Add support for TI BQ24190 Battery Charger")
Signed-off-by: Liam Breck <kernel@networkimprov.net>
Acked-by: Mark Greer <mgreer@animalcreek.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

We wrongly get uevents for bq24190-charger and bq24190-battery on every
register change.

Fix by checking the association with charger and battery before
emitting uevent(s).

Fixes: d7bf353f ("bq24190_charger: Add support for TI BQ24190 Battery Charger")
Signed-off-by: Liam Breck <kernel@networkimprov.net>
Acked-by: Mark Greer <mgreer@animalcreek.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

The device specific data is not fully initialized on
request_threaded_irq(). This may cause a crash when the IRQ handler
tries to reference them.

Fix the issue by installing IRQ handler at the end of the probe.

Fixes: d7bf353f ("bq24190_charger: Add support for TI BQ24190 Battery Charger")
Signed-off-by: Liam Breck <kernel@networkimprov.net>
Acked-by: Mark Greer <mgreer@animalcreek.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

pm_resume() does a register_reset() which clears charger host mode.

Fix by calling set_mode_host() after the reset.

Fixes: d7bf353f ("bq24190_charger: Add support for TI BQ24190 Battery Charger")
Signed-off-by: Liam Breck <kernel@networkimprov.net>
Acked-by: Mark Greer <mgreer@animalcreek.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

The interrupt signal is TRIGGER_FALLING. This is is specified in the
data sheet PIN FUNCTIONS: "The INT pin sends active low, 256us
pulse to host to report charger device status and fault."

Also the direction can be seen in the data sheet Figure 37 "BQ24190
with D+/D- Detection and USB On-The-Go (OTG)" which shows a 10k
pull-up resistor installed for the sample configurations.

Fixes: d7bf353f ("bq24190_charger: Add support for TI BQ24190 Battery Charger")
Signed-off-by: Liam Breck <kernel@networkimprov.net>
Acked-by: Mark Greer <mgreer@animalcreek.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

The added regulator dependency in the smbb driver causes build errors
when regulators are disabled, e.g. in randconfig build testing:

drivers/power/supply/qcom_smbb.o: In function `smbb_chg_otg_is_enabled':
qcom_smbb.c:(.text.smbb_chg_otg_is_enabled+0x18): undefined reference to `rdev_get_drvdata'
drivers/power/supply/qcom_smbb.o: In function `smbb_charger_probe':
qcom_smbb.c:(.text.smbb_charger_probe+0x410): undefined reference to `devm_regulator_register'

This adds a Kconfig dependency to avoid the link error.

Fixes: 61274eff ("power: supply: qcom_smbb: Add otg regulator for control of vbus")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

commit eacd8d09 ("power/reset: at91-reset: remove useless
at91_reset_platform_probe()") removed non DT probe support but forgot to
remove the now useless id_table. Do that now.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

Add samx7 support. It is lacking a few bits and needs a new reset function.
Signed-off-by: Szemző András <sza@esh.hu>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

drivers/power/supply/max14656_charger_detector.c:317:3-8:
No need to set .owner here. The core will do it.

Remove .owner field if calls are used which set it automatically

Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci

CC: Alexander Kurz <akurz@blala.de>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

Simplify return logic to avoid unnecessary variable assignments.
These issues were detected using Coccinelle and the following semantic patch:

@@
local idexpression ret;
expression e;
@@

-ret =
+return
     e;
-return ret;
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

Simplify return logic to avoid unnecessary variable assignments.
These issues were detected using Coccinelle and the following semantic patch:

@@
local idexpression ret;
expression e;
@@

-ret =
+return
     e;
-return ret;
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

LPDDR memories can only handle up to 400 uncontrolled power off. Ensure the
proper power off sequence is used before shutting down the platform.

Cc: <stable@vger.kernel.org> # 4.4+
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

The Atmel MPDDR controller support LPDDR2 and LPDDR3 memories, add their
types.

Cc: <stable@vger.kernel.org> # 4.4+
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

The MAX14656 USB charger detector, also known as "AL32" is used to detect
the presence and capabilities of attached USB chargers. The device is
attached via I2C plus one interrupt line to signalize events.

The device can be found in LG smartphones like LS665 and LS770, compatible
devices are present in 4th/5th generation Amazon Kindle readers referenced
in source code packages as "Maxim AL32".

The initial version of this driver has been extracted from LG source code
package LGLS665_Android_Lollipop_LS665ZV3, enriched with information from
the Kindle_src_4.1.3 source code package and adapted to the current power
class sysfs interface. Non-Standard Apple chargers which the device may
detect are mapped to the USB Battery Charging Specification Revision 1.2
class USB_DCP.
Signed-off-by: Alexander Kurz <akurz@blala.de>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

Signed-off-by: Alexander Kurz <akurz@blala.de>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

Add a regulator to control the OTG chargepath switch.  This
is used by USB code to control VBUS direction - out for host mode
on the OTG port, and in for charging mode.
Signed-off-by: Tim Bird <tim.bird@sonymobile.com>
Acked-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Reviewed-by: Andy Gross <andy.gross@linaro.org>
[stephen.boyd@linaro.org: Fix supply name, constify ops, drop
machine.h and of_regulator.h includes]
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

Add a binding for the regulator which controls the OTG chargepath switch.
The OTG switch gets its power from pm8941_5vs1, and that should be
expressed as a usb_otg_in-supply property in the DT node for the
charger driver.  The regulator name is "otg-vbus".
Signed-off-by: Tim Bird <tim.bird@sonymobile.com>
Acked-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Reviewed-by: Andy Gross <andy.gross@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

The bq27xxx binding is a standard i2c style binding, however the
deprecated compatible fields and different revisions warrant its own
documentation.
Signed-off-by: Chris Lapa <chris@lapa.com.au>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Reviewed-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

This commit adds the BQ27520G4 chip definition to specifically match the
bq27520-G4 functionality as described in the datasheet.
Signed-off-by: Chris Lapa <chris@lapa.com.au>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Reviewed-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

This commit adds the BQ27520G3 chip definition to specifically match the
bq27520-G3 functionality as described in the datasheet.
Signed-off-by: Chris Lapa <chris@lapa.com.au>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Reviewed-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

This commit adds the BQ27520G2 chip definition to specifically match the
bq27520-G2 functionality as described in the datasheet.
Signed-off-by: Chris Lapa <chris@lapa.com.au>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Reviewed-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

This commit adds the BQ27520G1 chip definition to specifically match the
bq27520-G1 functionality as described in the datasheet.
Signed-off-by: Chris Lapa <chris@lapa.com.au>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Reviewed-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

This commit adds the BQ27510G3 chip definition to specifically match the
bq27510-G3 functionality as described in the datasheet.
Signed-off-by: Chris Lapa <chris@lapa.com.au>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Reviewed-by: Andrew F. Davis <afd@ti.com>
Tested-by: Chris Lapa <chris@lapa.com.au>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

This commit adds the BQ27510G2 chip definition to specifically match the
bq27510-G2 functionality as described in the datasheet.
Signed-off-by: Chris Lapa <chris@lapa.com.au>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Reviewed-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

This commit adds the BQ27510G1 chip definition to specifically match the
bq27510-G1 functionality as described in the datasheet.
Signed-off-by: Chris Lapa <chris@lapa.com.au>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Reviewed-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

This commit adds the BQ27500 chip definition to specifically match the
bq27500/1 functionality as described in the datasheet.
Signed-off-by: Chris Lapa <chris@lapa.com.au>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Reviewed-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

The BQ2751X definition exists only to satisfy backwards compatibility.
Signed-off-by: Chris Lapa <chris@lapa.com.au>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

The BQ2750X definition exists only to satisfy backwards compatibility.
Signed-off-by: Chris Lapa <chris@lapa.com.au>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

Casting of_device_get_match_data return value to int causes warning on 64bit
architectures.

../drivers/power/supply/axp20x_usb_power.c: In function
'axp20x_usb_power_probe':
../drivers/power/supply/axp20x_usb_power.c:297:21: warning: cast from
pointer to integer of different size [-Wpointer-to-int-cast]

Fixes: 0dcc70ca ("power: supply: axp20x_usb_power: use of_device_id
    data field instead of device_is_compatible")
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

This is done for readability as the upcoming commits will add a lot of
cases.

tested: no
Signed-off-by: Chris Lapa <chris@lapa.com.au>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Reviewed-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

Add interrupt specifiers for USB and AC charger input. Interrupt numbers
are from the datasheet.
Fix wrong property for compatible string.
Signed-off-by: Milo Kim <woogyom.kim@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

The Moorestown support was removed by commit 1a8359e4 ("x86/mid: Remove
Intel Moorestown").

Remove this leftover.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

The GPIO charger is using a mix of the legacy GPIO interface
and <linux/of_gpio.h> which is not the modern way to use GPIOs.

Refactor like this:

- Use a GPIO descriptor for the GPIO line used to monitor the
  charger.
- Fetch the descriptor with devm_gpiod_get() as the first
  method.
- If this fails and we are *not* using device tree, then
  start looking to see if we can use platform data instead.
- After looking up and requesting a GPIO number with the
  legacy API, convert it to a descriptor.

This way we can later isolate and drop the legacy code as
more platforms move over to using descriptors.

Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

trivial fix to spelling mistake in comments in the headers
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>