mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2026-01-10 01:21:49 +00:00
165f7d6f3b
suzy-qable advertises 1.5A, but its actual capability depends on the host USB port it is attached to. Since suzy-qable is ubiquitous and other DTS sources may behave in the same way, ramp the input current limit in order to find a reasonable maximum. BUG=chromium:770296 BRANCH=None TEST=Attach suzy-qable to kevin and reef, verify that neither OCs and EC console via cr50 is available on reef. Also verify donette chargers kevin at 3A and does not ramp. Change-Id: Idd0683ede3a44111a01da6b4faab52f388ee82fd Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/693295 Commit-Ready: Shawn N <shawnn@chromium.org> Tested-by: Shawn N <shawnn@chromium.org> Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
42 lines
1.0 KiB
C
42 lines
1.0 KiB
C
/* Copyright 2017 The Chromium OS Authors. All rights reserved.
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
/* Charge input current limit ramp module for Chrome EC */
|
|
|
|
#include "charge_manager.h"
|
|
#include "common.h"
|
|
#include "system.h"
|
|
#include "usb_charge.h"
|
|
#include "util.h"
|
|
|
|
#define TYPEC_DTS_RAMP_MAX 2400
|
|
|
|
test_mockable int chg_ramp_allowed(int supplier)
|
|
{
|
|
/* Don't allow ramping in RO when write protected. */
|
|
if (!system_is_in_rw() && system_is_locked())
|
|
return 0;
|
|
|
|
/* Ramp DTS suppliers. */
|
|
if (supplier == CHARGE_SUPPLIER_TYPEC_DTS)
|
|
return 1;
|
|
|
|
/* Othewise ask the BC1.2 detect module */
|
|
return usb_charger_ramp_allowed(supplier);
|
|
}
|
|
|
|
test_mockable int chg_ramp_max(int supplier, int sup_curr)
|
|
{
|
|
/*
|
|
* Ramp DTS suppliers to advertised current or predetermined
|
|
* limit, whichever is greater.
|
|
*/
|
|
if (supplier == CHARGE_SUPPLIER_TYPEC_DTS)
|
|
return MAX(TYPEC_DTS_RAMP_MAX, sup_curr);
|
|
|
|
/* Otherwise ask the BC1.2 detect module */
|
|
return usb_charger_ramp_max(supplier, sup_curr);
|
|
}
|