From patchwork Thu Aug 18 08:52:20 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Finley Xiao X-Patchwork-Id: 9287025 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 764FF600CB for ; Thu, 18 Aug 2016 08:59:15 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 651D92896F for ; Thu, 18 Aug 2016 08:59:15 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 588BB28979; Thu, 18 Aug 2016 08:59:15 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id DED1A2896F for ; Thu, 18 Aug 2016 08:59:14 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1baJAQ-0004P4-91; Thu, 18 Aug 2016 08:59:14 +0000 Received: from regular1.263xmail.com ([211.150.99.137]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1baJ9v-0003tk-QL; Thu, 18 Aug 2016 08:58:45 +0000 Received: from finley.xiao?rock-chips.com (unknown [192.168.167.110]) by regular1.263xmail.com (Postfix) with SMTP id 19541DC9F; Thu, 18 Aug 2016 16:58:16 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-ADDR-CHECKED: 0 Received: from localhost.localdomain (localhost [127.0.0.1]) by smtp.263.net (Postfix) with ESMTP id ECAF43CF; Thu, 18 Aug 2016 16:57:58 +0800 (CST) X-RL-SENDER: finley.xiao@rock-chips.com X-FST-TO: srinivas.kandagatla@linaro.org X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: finley.xiao@rock-chips.com X-UNIQUE-TAG: <9720831b6024a05bb5fd53f50849cb34> X-ATTACHMENT-NUM: 0 X-SENDER: xf@rock-chips.com X-DNS-TYPE: 0 Received: from unknown (unknown [58.22.7.114]) by smtp.263.net (Postfix) whith SMTP id 5502DN0BMX; Thu, 18 Aug 2016 16:58:11 +0800 (CST) From: Finlye Xiao To: srinivas.kandagatla@linaro.org, maxime.ripard@free-electrons.com, heiko@sntech.de, robh+dt@kernel.org, frowand.list@gmail.com, sre@kernel.org, dbaryshkov@gmail.com, dwmw2@infradead.org, mark.rutland@arm.com, khilman@kernel.org, nm@ti.com, rjw@rjwysocki.net, viresh.kumar@linaro.org, sboyd@codeaurora.org Subject: [PATCH v2 3/4] dt-bindings: add binding document for Rockchip cpu avs Date: Thu, 18 Aug 2016 16:52:20 +0800 Message-Id: <1471510341-63926-4-git-send-email-finley.xiao@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1471510341-63926-1-git-send-email-finley.xiao@rock-chips.com> References: <1471510341-63926-1-git-send-email-finley.xiao@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160818_015844_245229_74273773 X-CRM114-Status: UNSURE ( 9.42 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, tim.chen@rock-chips.com, linux-pm@vger.kernel.org, lin.huang@rock-chips.com, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, tony.xie@rock-chips.com, Finley Xiao , ulysses.huang@rock-chips.com, rocky.hao@rock-chips.com, jay.xu@rock-chips.com, linux-arm-kernel@lists.infradead.org, wxt@rock-chips.com MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Finley Xiao This patch documents the Rockchip cpu avs device tree binding. Signed-off-by: Finley Xiao --- .../devicetree/bindings/power/rockchip-cpu-avs.txt | 37 ++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/rockchip-cpu-avs.txt diff --git a/Documentation/devicetree/bindings/power/rockchip-cpu-avs.txt b/Documentation/devicetree/bindings/power/rockchip-cpu-avs.txt new file mode 100644 index 0000000..705f516 --- /dev/null +++ b/Documentation/devicetree/bindings/power/rockchip-cpu-avs.txt @@ -0,0 +1,37 @@ +Rockchip cpu avs device tree bindings +------------------------------------- + +Under the same frequency, the operating voltage tends to decrease with +increasing leakage. so it is necessary to adjust opp's voltage according +to leakage for power. + + +Required properties: +- compatible: Should be one of the following. + - "rockchip,rk3399-cpu-avs" - for RK3399 SoCs. +- leakage-volt-: Named leakage-volt property. At runtime, the + platform can find a cpu's cluster_id according to it's cpu_id and match + leakage-volt- property. The property is an array of 3-tuples + items, and each item consists of leakage and voltage like + . + min-leakage: minimum leakage in mA, ranges from 0 to 254. + max-leakage: maximum leakage in mA, ranges from 0 to 254. + volt: voltage offset in mV to apply to the opp table entries. + +Example: + + cpu_avs: cpu-avs { + compatible = "rockchip,rk3399-cpu-avs"; + leakage-volt-cluster0 = < + /* mA mA uV*/ + 0 100 0 + 101 200 (-25000) + 201 254 (-50000) + >; + leakage-volt-cluster1 = < + /* mA mA uV*/ + 0 100 0 + 101 200 (-25000) + 201 254 (-50000) + >; + };