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| author | Enric Balletbo i Serra <enric.balletbo@collabora.com> | 2017-01-27 18:43:46 +0100 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2017-02-01 12:44:23 +0100 |
| commit | 4c466872d8ae8e3cdc3e5e1a47e28a15e3020d8b (patch) | |
| tree | 12e1940455bb76c712476e5ef2e66244c09b68f0 /Documentation | |
| parent | 5dff3a3113173a0c835abbda0eef3c0a2a56cc3a (diff) | |
| download | linux-4c466872d8ae8e3cdc3e5e1a47e28a15e3020d8b.tar.gz linux-4c466872d8ae8e3cdc3e5e1a47e28a15e3020d8b.tar.xz | |
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')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-i2c-devices-bq32k | 7 |
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 new file mode 100644 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. |