Documentation: power: max77693-charger: Document exported sysfs entry

Document the settings exported by max77693 charger driver through sysfs
entries:
 - fast_charge_timer
 - top_off_threshold_current
 - top_off_timer

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

diff --git a/Documentation/ABI/testing/sysfs-class-power b/Documentation/ABI/testing/sysfs-class-power
index 909e760..369d2a2 100644 (file)
--- a/Documentation/ABI/testing/sysfs-class-power
+++ b/Documentation/ABI/testing/sysfs-class-power
@@ -32,3 +32,45 @@ Description:
                Valid values:
                - 5, 6 or 7 (hours),
                - 0: disabled.
+
+What:          /sys/class/power_supply/max77693-charger/device/fast_charge_timer
+Date:          January 2015
+KernelVersion: 3.19.0
+Contact:       Krzysztof Kozlowski <k.kozlowski@samsung.com>
+Description:
+               This entry shows and sets the maximum time the max77693
+               charger operates in fast-charge mode. When the timer expires
+               the device will terminate fast-charge mode (charging current
+               will drop to 0 A) and will trigger interrupt.
+
+               Valid values:
+               - 4 - 16 (hours), step by 2 (rounded down)
+               - 0: disabled.
+
+What:          /sys/class/power_supply/max77693-charger/device/top_off_threshold_current
+Date:          January 2015
+KernelVersion: 3.19.0
+Contact:       Krzysztof Kozlowski <k.kozlowski@samsung.com>
+Description:
+               This entry shows and sets the charging current threshold for
+               entering top-off charging mode. When charging current in fast
+               charge mode drops below this value, the charger will trigger
+               interrupt and start top-off charging mode.
+
+               Valid values:
+               - 100000 - 200000 (microamps), step by 25000 (rounded down)
+               - 200000 - 350000 (microamps), step by 50000 (rounded down)
+               - 0: disabled.
+
+What:          /sys/class/power_supply/max77693-charger/device/top_off_timer
+Date:          January 2015
+KernelVersion: 3.19.0
+Contact:       Krzysztof Kozlowski <k.kozlowski@samsung.com>
+Description:
+               This entry shows and sets the maximum time the max77693
+               charger operates in top-off charge mode. When the timer expires
+               the device will terminate top-off charge mode (charging current
+               will drop to 0 A) and will trigger interrupt.
+
+               Valid values:
+               - 0 - 70 (minutes), step by 10 (rounded down)