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authorEnric Balletbo i Serra <enric.balletbo@collabora.com>2017-01-27 18:43:46 +0100
committerAlexandre Belloni <alexandre.belloni@free-electrons.com>2017-02-01 12:44:23 +0100
commit4c466872d8ae8e3cdc3e5e1a47e28a15e3020d8b (patch)
tree12e1940455bb76c712476e5ef2e66244c09b68f0 /Documentation/ABI
parent5dff3a3113173a0c835abbda0eef3c0a2a56cc3a (diff)
downloadlinux-4c466872d8ae8e3cdc3e5e1a47e28a15e3020d8b.tar.bz2
rtc: bq32000: add support to enable disable the trickle charge FET bypass
The bq32000 includes a trickle charge circuit to maintain the charge of the backup supply when a super capacitor is used. You can enable the charging circuit by setting 'trickle-resistor-ohms', additionally you can set TCFE to 1 to bypass the internal diode and boost the charge voltage of the backup supply. You might want to enable/disable the TCFE switch from userspace (e.g when device is only connected to a battery) This patch introduces a new sysfs entry to enable and disable this FET form userspace. Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Diffstat (limited to 'Documentation/ABI')
-rw-r--r--Documentation/ABI/testing/sysfs-bus-i2c-devices-bq32k7
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-i2c-devices-bq32k b/Documentation/ABI/testing/sysfs-bus-i2c-devices-bq32k
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index 000000000000..398b258fb770
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-i2c-devices-bq32k
@@ -0,0 +1,7 @@
+What: /sys/bus/i2c/devices/.../trickle_charge_bypass
+Date: Jan 2017
+KernelVersion: 4.11
+Contact: Enric Balletbo i Serra <eballetbo@gmail.com>
+Description: Attribute for enable/disable the trickle charge bypass
+ The trickle_charge_bypass attribute allows the userspace to
+ enable/disable the Trickle charge FET bypass.