From 61bbfcaa37ecec87a9cea89e0f8fc65ecbecd13e Mon Sep 17 00:00:00 2001 From: Eric Yilun Lin Date: Fri, 14 May 2021 15:36:41 +0800 Subject: usbpd: support dynamic PDO selection Support dynamic PDO selection CONFIG_USB_PD_DPS. This config controls the charging voltage and power according to the input power and battery configuration. DPS would continuously evaluate the system load and current charging voltage, and decide a new one by below: 1. If the PDO can fulfill system desired power. 2. If the PDO is efficient for the battery configuration. To detect if the system load cannot be fulfilled by the current PDO, it checks: 1. if the input current closes to the PDO current limit. 2. if the input power closes to the PDO maximum power. To detect if the system load can be fulfilled by a more efficient PDO, it checks: - if the voltage of a new PDO is closer to the battery voltage than the current PDO, and the power is able fulfill the system load. BUG=b:169532537 TEST=1. tested on asurada, the charging voltage is able to switch to different PDOs under different system loads 2. tested that the DPS is able to switch charge port (e.g. C1 12V -> C0 9V) based on the provided PDOs. BRANCH=asurada Change-Id: I7c7706b331dc0d4f8ac68569dc7ed852fc9308e3 Signed-off-by: Eric Yilun Lin Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2897064 Tested-by: Eric Yilun Lin Reviewed-by: Diana Z Commit-Queue: Eric Yilun Lin --- include/config.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'include/config.h') diff --git a/include/config.h b/include/config.h index 1366d86662..f157047273 100644 --- a/include/config.h +++ b/include/config.h @@ -4114,6 +4114,15 @@ */ #undef CONFIG_USB_PD_TCPMV2 +/* + * Enable dynamic PDO selection. + * + * DPS picks a power efficient voltage regarding to the battery configuration + * and the system loading. It monitors PIn (Power In), so VBUS/IBUS ADC + * should be supported on the platform. + */ +#undef CONFIG_USB_PD_DPS + /* * Device Types for TCPMv2. * -- cgit v1.2.1