Function platform_get_irq_byname() returns a negative error code on
failure, and a zero or positive number on success. However, in function
cpcap_usb_init_irq(), positive IRQ numbers are also taken as error
cases. Use "if (irq < 0)" instead of "if (!irq)" to validate the return
value of platform_get_irq_byname().
Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Otherwise cpcap-battery won't probe properly with the power-supplies
property configured but will fail with "Not all required supplies found,
defer probe".
Cc: Marcel Partap <mpartap@gmx.net>
Cc: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
With the ADC driver working, we can now fix the voltage table based on
the values read from the ADC.
Note that unlike the ICHRG registers, the VCHRG register bits don't
match the MC13783UG.pdf.
Cc: Marcel Partap <mpartap@gmx.net>
Cc: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Turns out a similar battery charger hardware is documented for NXP MC13783
PMIC in "MC13783 Power Management and Audio Circuit Users's Guide" named
MC13783UG.pdf. Looks like the CPCAP charge current table matches that, so
let's start using the nominal values from it.
While at it, let's also add comments to some of the mystery CPCAP charger
registers based on the MC13783UG.pdf documentation.
Note that this patch does not contain any functional changes, the register
values being used stay the same.
Cc: Marcel Partap <mpartap@gmx.net>
Cc: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Android does not seem to set the trickle charger bits, and these
seem to be only used by the bootloader when bringing up a
completely discharged battery. So let's keep the trickle charging
bits disabled and avoid misconfiguring the hardware.
Fixes: 0c9888e3c1 ("power: supply: cpcap-charger: Add minimal
CPCAP PMIC battery charger")
Cc: Marcel Partap <mpartap@gmx.net>
Cc: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Zero is a valid register value for for 3.8V charging.
Fixes: 0c9888e3c1 ("power: supply: cpcap-charger: Add minimal
CPCAP PMIC battery charger")
Cc: Marcel Partap <mpartap@gmx.net>
Cc: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
We have the charge voltage wrong, it should be 4.35V instead of 4.2V.
This will cause the battery to never get fully charged.
I noticed this when looking at the Andoid kernel battery and charger
status for a fully charged battery:
POWER_SUPPLY_VOLTAGE_NOW=4351000
Also the battery on droid 4 says "4.35, 1735/1785mAh (min/typ),
6.6/6.8 Wh (min/typ)". Presumably the 4.35 on the battery is the
charge voltage.
And finally, on Android the CPCAP CRM register is set to 0x03b5 where
the b is the charge voltage.
Let's fix the charge voltage define and update the charge configuration
to use the 4.35V setting.
Fixes: 0c9888e3c1 ("power: supply: cpcap-charger: Add minimal
CPCAP PMIC battery charger")
Cc: Marcel Partap <mpartap@gmx.net>
Cc: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
I noticed we have a different name from what Android is using.
Let's not break the /sys/class/power user space interface here
and use the same naming as Android has.
On Android we have the following for droid 4:
$ ls /sys/class/power_supply/
ac battery usb
So let's use the usb naming here for charger too.
Fixes: 0c9888e3c1 ("power: supply: cpcap-charger: Add minimal
CPCAP PMIC battery charger")
Cc: Marcel Partap <mpartap@gmx.net>
Cc: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
The custom CPCAP PMIC used on Motorola phones such as Droid 4 has a
USB battery charger. It can optionally also have a companion chip that
is used for wireless charging.
The charger on CPCAP also can feed VBUS for the USB host mode. This
can be handled by the existing kernel phy_companion interface.
Cc: devicetree@vger.kernel.org
Cc: Marcel Partap <mpartap@gmx.net>
Cc: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
