diff options
| author | Vincent Palatin <vpalatin@chromium.org> | 2016-10-26 13:58:25 +0200 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2016-10-31 03:27:49 -0700 |
| commit | cf7ff32b92275f9d4cce4bc3bcaa7d8890b0cb2e (patch) | |
| tree | 37b80e9f034a01ef8c2a38901500266273a9db92 /board/reef/usb_pd_policy.c | |
| parent | 34066e92a92b6ff0f1b4b311b46d13b6a4ab45e3 (diff) | |
| download | chrome-ec-cf7ff32b92275f9d4cce4bc3bcaa7d8890b0cb2e.tar.gz | |
kevin: set accurate current limit on USB load switch
When sourcing current on the type-C port, set the OCP limit on the VBUS
load switch according to current dynamic capability.
(3.0A when only one port is a power source, 1.5A else)
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
BRANCH=gru
BUG=chrome-os-partner:56110
TEST=manual: connect Caroline to Kevin with Twinkie in between,
ask Caroline to sink current through the UI.
without anything else connected on Kevin, see 3A flowing when measuring
with Twinkie ('tw vbus'), plug a dangling C-to-A receptacle dongle on
the other Kevin port and see 1.5A flowing through Twinkie.
Force the input current limit on Caroline to 3.0A and see Kevin cutting
VBUS.
Change-Id: Ib879b1ed720b20aa702c5f3643948ba0575d1193
Reviewed-on: https://chromium-review.googlesource.com/403869
Commit-Ready: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Shawn N <shawnn@chromium.org>
Diffstat (limited to 'board/reef/usb_pd_policy.c')
| -rw-r--r-- | board/reef/usb_pd_policy.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/board/reef/usb_pd_policy.c b/board/reef/usb_pd_policy.c index 6e515abf81..693bd6e2e4 100644 --- a/board/reef/usb_pd_policy.c +++ b/board/reef/usb_pd_policy.c @@ -51,6 +51,11 @@ void pd_transition_voltage(int idx) /* No-operation: we are always 5V */ } +int board_vbus_source_enabled(int port) +{ + return gpio_get_level(port ? GPIO_USB_C1_5V_EN : GPIO_USB_C0_5V_EN); +} + int pd_set_power_supply_ready(int port) { /* Ensure we're not charging from this port */ |