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Thu, 21 Nov 2024 19:47:34 -0800 (PST) Received: from lschyi-p920.tpe.corp.google.com ([2401:fa00:1:10:533e:26bf:b63:973a]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-724de554b11sm550174b3a.133.2024.11.21.19.47.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 Nov 2024 19:47:33 -0800 (PST) From: Sung-Chi Li Subject: [PATCH 0/2] Extend the cros_usbpd-charger to make it a passive thermal cooling device Date: Fri, 22 Nov 2024 11:47:20 +0800 Message-Id: <20241122-extend_power_limit-v1-0-a3ecd87afa76@chromium.org> Precedence: bulk X-Mailing-List: chrome-platform@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAMj+P2cC/x3MQQqAIBBA0avErBNyiKKuEhGmYw2UhUoJ0d2Tl m/x/wOBPFOAvnjA08WBD5chywL0qtxCgk02YIW1lIiCUiRnpvO4yU8b7xxFgxpNp9RsVQs5PD1 ZTv90GN/3A9AOCHBkAAAA To: Benson Leung , Guenter Roeck , Sebastian Reichel , Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: chrome-platform@lists.linux.dev, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Sung-Chi Li X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1732247251; l=964; i=lschyi@chromium.org; s=20241113; h=from:subject:message-id; bh=9PRuTzDBqQfJQDriZ1LwQnsJ3pxswr44u/jT5UYum2w=; b=Zc1RWAqzt3jVrYqd5ASn9V+gjaIAcZeOGISABX0Ac99Xxsn8I3BztCE6a22BtmSCbL3aekvws faN/RYixLo6Dxfe7unI1ySbUZo5kTdF4qousRqILdTYvWR2gEqJJnw3 X-Developer-Key: i=lschyi@chromium.org; a=ed25519; pk=nE3PJlqSK35GdWfB4oVLOwi4njfaUZRhM66HGos9P6o= The cros_usbpd-charger already supports limiting input current, so we can easily extend it as a passive thermal cooling device. By limiting the current flow into the system, we can reduce the heat generated by related chips, which results in reserving more thermal budget for the system. This series will only works on making it a OF style thermal cooling device, so related code are guarded by #ifdef macros. --- Sung-Chi Li (2): power: supply: cros_usbpd-charger: extend as a thermal of cooling device dt-bindings: mfd: cros-ec: add properties for thermal cooling cells .../devicetree/bindings/mfd/google,cros-ec.yaml | 3 + drivers/power/supply/cros_usbpd-charger.c | 98 ++++++++++++++++++++-- 2 files changed, 96 insertions(+), 5 deletions(-) --- base-commit: ac24e26aa08fe026804f678599f805eb13374a5d change-id: 20241122-extend_power_limit-62c2d9aabfa7 Best regards,