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[v7,3/3] Documentation: power: rt9471: Document exported sysfs entries

Message ID 1664531079-15915-4-git-send-email-u0084500@gmail.com
State New
Headers show
Series Add Richtek RT9471 3A battery charger support | expand

Commit Message

cy_huang Sept. 30, 2022, 9:44 a.m. UTC 
From: ChiYuan Huang <cy_huang@richtek.com>

Document the settings exported by rt9471 charger driver through sysfs entries:
- sysoff_enable
- port_detect_enable

Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
---
Since v6:
- Explain more details for sysoff_enable attribute.

Since v5:
- Recover all the change in sysfs-class-power.
- New a sysfs-class-power-rt9471 file.
- Remove 'charge_term_enable' sysfs entry, directly integrate it in
  'charge_term_current' power supply property control.

---
 Documentation/ABI/testing/sysfs-class-power-rt9471 | 32 ++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-class-power-rt9471
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Patch

diff --git a/Documentation/ABI/testing/sysfs-class-power-rt9471 b/Documentation/ABI/testing/sysfs-class-power-rt9471
new file mode 100644
index 00000000..38227a8
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-power-rt9471
@@ -0,0 +1,32 @@ 
+What:		/sys/class/power_supply/rt9471-*/sysoff_enable
+Date:		Oct 2022
+KernelVersion:	6.1
+Contact:	ChiYuan Huang <cy_huang@richtek.com>
+Description:
+		This entry allows enabling the sysoff mode of rt9471 charger devices.
+		If enabled and the input is removed, the internal battery FET is turned
+		off to reduce the leakage from the BAT pin. See device datasheet for details.
+		It's commonly used when the product enter shipping stage. After entering
+		shipping mode, only 'VBUS' or 'Power key" pressed can make it leave this
+		mode. 'Disable' also can help to leave it, but it's more like to abort
+		the action before the device really enter shipping mode.
+
+		Access: Read, Write
+		Valid values:
+		- 1: enabled
+		- 0: disabled
+
+What:		/sys/class/power_supply/rt9471-*/port_detect_enable
+Date:		Oct 2022
+KernelVersion:	6.1
+Contact:	ChiYuan Huang <cy_huang@richtek.com>
+Description:
+		This entry allows enabling the USB BC12 port detect function of rt9471 charger
+		devices. If enabled and VBUS is inserted, device will start to do the BC12
+		port detect and report the usb port type when port detect is done. See
+		datasheet for details. Normally controlled when TypeC/USBPD port integrated.
+
+		Access: Read, Write
+		Valid values:
+		- 1: enabled
+		- 0: disabled