Commit Graph

11 Commits

Author SHA1 Message Date
Tony Lindgren
35c3c196d3 power: bq24190_charger: Check the interrupt status on resume
Some SoCs like omap3 can configure GPIO irqs to use Linux generic
dedicated wakeirq support. If the dedicated wakeirq is configured,
the SoC will use a always-on interrupt controller to produce wake-up
events.

If bq24190 is configured for dedicated wakeirq, we need to check the
interrupt status on PM runtime resume. This is because the Linux
generic wakeirq will call pm_runtime_resume() on the device on a
wakeirq. And as the bq24190 interrupt is falling edge sensitive
and only active for 250 us, there will be no device interrupt seen
by the runtime SoC IRQ controller.

Note that this can cause spurious interrupts on omap3 devices with
bq24190 connected to gpio banks 2 - 5 as there's a glitch on those
pins waking from off mode as listed in "Advisory 1.45". Devices
with this issue should not configure the optional wakeirq interrupt
in the dts file.

Acked-by: Mark Greer <mgreer@animalcreek.com>
Acked-by: Liam Breck <kernel@networkimprov.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2017-04-14 01:41:33 +02:00
Liam Breck
cb190af290 power: supply: bq24190_charger: Adjust formatting
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>
2017-01-20 12:45:53 +01:00
Liam Breck
ba52e75718 power: supply: bq24190_charger: Handle fault before status on interrupt
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: d7bf353fd0 ("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>
2017-01-20 12:43:11 +01:00
Liam Breck
68abfb8015 power: supply: bq24190_charger: Don't read fault register outside irq_handle_thread()
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: d7bf353fd0 ("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>
2017-01-20 12:43:07 +01:00
Liam Breck
2d9fee6a42 power: supply: bq24190_charger: Call power_supply_changed() for relevant component
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: d7bf353fd0 ("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>
2017-01-20 12:43:03 +01:00
Liam Breck
d62acc5ef0 power: supply: bq24190_charger: Install irq_handler_thread() at end of probe()
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: d7bf353fd0 ("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>
2017-01-20 12:42:59 +01:00
Liam Breck
e05ad7e074 power: supply: bq24190_charger: Call set_mode_host() on pm_resume()
pm_resume() does a register_reset() which clears charger host mode.

Fix by calling set_mode_host() after the reset.

Fixes: d7bf353fd0 ("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>
2017-01-20 12:42:55 +01:00
Liam Breck
767eee362f power: supply: bq24190_charger: Fix irq trigger to IRQF_TRIGGER_FALLING
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: d7bf353fd0 ("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>
2017-01-20 12:42:37 +01:00
Colin Ian King
c56ca24a01 power: supply: fix spelling mistake: supply: "Celcius" -> "Celsius"
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>
2017-01-04 22:04:46 +01:00
Tony Lindgren
075eb5719d bq24190_charger: Fix PM runtime use for bq24190_battery_set_property
There's a typo, it should do pm_runtime_get_sync, not put.

Fixes: d7bf353fd0 ("bq24190_charger: Add support for TI BQ24190 Battery Charger")
Cc: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-11-23 23:27:41 +01:00
Sebastian Reichel
8c0984e5a7 power: move power supply drivers to power/supply
This moves all power supply drivers from drivers/power/
to drivers/power/supply/. The intention is a cleaner
source tree, since drivers/power/ also contains frameworks
unrelated to power supply, like adaptive voltage scaling.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-08-11 01:11:03 +02:00