From patchwork Wed Jan 27 00:37:58 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: John Stultz X-Patchwork-Id: 60549 Delivered-To: patches@linaro.org Received: by 10.112.130.2 with SMTP id oa2csp2289454lbb; Tue, 26 Jan 2016 16:38:06 -0800 (PST) X-Received: by 10.98.75.156 with SMTP id d28mr38729492pfj.108.1453855085702; Tue, 26 Jan 2016 16:38:05 -0800 (PST) Return-Path: Received: from mail-pf0-x232.google.com (mail-pf0-x232.google.com. [2607:f8b0:400e:c00::232]) by mx.google.com with ESMTPS id w3si5273470pfi.110.2016.01.26.16.38.05 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 26 Jan 2016 16:38:05 -0800 (PST) Received-SPF: pass (google.com: domain of john.stultz@linaro.org designates 2607:f8b0:400e:c00::232 as permitted sender) client-ip=2607:f8b0:400e:c00::232; Authentication-Results: mx.google.com; spf=pass (google.com: domain of john.stultz@linaro.org designates 2607:f8b0:400e:c00::232 as permitted sender) smtp.mailfrom=john.stultz@linaro.org; dkim=pass header.i=@linaro.org Received: by mail-pf0-x232.google.com with SMTP id 65so19922605pfd.2 for ; Tue, 26 Jan 2016 16:38:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-type:content-transfer-encoding; bh=SZNpH8C+mhOM3d+q0fwbSOsnOrhJFTIVbUq8hp3M24E=; b=SMpqSqcpNu1MRaX67+uom2xKuCWtPF1RFz7GwQ9LJj6A8LPQZZUNYB80cKrJZEvaJ8 5IJ9WvergEwim9SSHdPPH3Zb7lmGmUrw2IaB08XDEE4Jesfl01/sOx6VkjjH6O2s/7D7 OEWwkNDUcCN6m5drkyazQurPFBI66QiMU9Yak= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-type:content-transfer-encoding; bh=SZNpH8C+mhOM3d+q0fwbSOsnOrhJFTIVbUq8hp3M24E=; b=DcrN47if8fq+KG1fY2jEIrXPDQCrsXlMjnWWNMcJGIaMgR0nwM0G5aImcNPSrV/Fgv j9EeKaQ9DIzpLRd0sdoONocJkyvIo1VXBYqTRwuuywVBcqtisLsQ0pQWSyz/PAzMGDeF dNJomkh7YF3KLAFfCWLJwe66Gipvs8cUlM1orKjKW/UiD9Z0RF3WDbMRBjd2K5MXtNQt vDTAa9wv//4IFwbejuSmY+MNrGW7+tzQovlkMgpQTrkT6jgUWH1iFIETQhPbQwqiFlmj jD6FuGAm0jsvFk+C6KrqPLHakyKgoRDHFAxcC75EQOkxmMCkvt1arckx+C1ADpTtyu1x E6MA== X-Gm-Message-State: AG10YORwqZtXLwfc5SMSzSn36a52ZDh3It3njTAfR0pBjnzIMtrG9a7HAvadFc9FWTKx44k8eHE= X-Received: by 10.98.71.211 with SMTP id p80mr37850134pfi.135.1453855085330; Tue, 26 Jan 2016 16:38:05 -0800 (PST) Return-Path: Received: from localhost.localdomain (c-76-115-103-22.hsd1.or.comcast.net. [76.115.103.22]) by smtp.gmail.com with ESMTPSA id c86sm4321091pfd.75.2016.01.26.16.38.04 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 26 Jan 2016 16:38:04 -0800 (PST) From: John Stultz To: lkml Cc: John Stultz , Andy Yan , Rob Herring , Arnd Bergmann , Thierry Reding , =?UTF-8?q?Heiko=20St=C3=BCbner?= , Caesar Wang , Kees Cook , Guodong Xu , Haojian Zhuang , Vishal Bhoj , Bjorn Andersson , devicetree@vger.kernel.org, Android Kernel Team Subject: [RFC][PATCH 1/3] dt-bindings: power: reset: Add document for sram-reboot-mode driver Date: Tue, 26 Jan 2016 16:37:58 -0800 Message-Id: <1453855080-17760-2-git-send-email-john.stultz@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1453855080-17760-1-git-send-email-john.stultz@linaro.org> References: <1453855080-17760-1-git-send-email-john.stultz@linaro.org> MIME-Version: 1.0 Add device tree binding document for reboot-mode driver Cc: Andy Yan Cc: Rob Herring Cc: Arnd Bergmann Cc: Thierry Reding Cc: Heiko Stübner Cc: Caesar Wang Cc: Kees Cook Cc: Guodong Xu Cc: Haojian Zhuang Cc: Vishal Bhoj Cc: Bjorn Andersson Cc: devicetree@vger.kernel.org Cc: Android Kernel Team Signed-off-by: John Stultz --- .../bindings/power/reset/sram-reboot-mode.txt | 47 ++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/reset/sram-reboot-mode.txt -- 1.9.1 diff --git a/Documentation/devicetree/bindings/power/reset/sram-reboot-mode.txt b/Documentation/devicetree/bindings/power/reset/sram-reboot-mode.txt new file mode 100644 index 0000000..33bb132 --- /dev/null +++ b/Documentation/devicetree/bindings/power/reset/sram-reboot-mode.txt @@ -0,0 +1,47 @@ +SRAM reboot mode driver + +This driver get reboot mode magic value form reboot-mode driver +and stores it in a SRAM address. Then the bootloader +can read it and take different action according to the magic +value stored. + +This DT node should be represented as a sub-node of a "mmio-sram", "simple-bus" +node. + +Required properties: +- compatible: should be "sram-reboot-mode" +- reg: offset from the sram range where to store the magic value(in bytes) + +The rest of the properties should follow the generic reboot-mode discription +found in reboot-mode.txt + +Example: + + sram@5f01000 { + compatible = "mmio-sram", "simple-bus"; + reg = <0x0 0x05f01000 0x0 0x00001000>; + ranges = <0x0 0x0 0x05f01000 0x00001000>; + + #address-cells = <1>; + #size-cells = <1>; + + reboot-mode@0 { + compatible = "sram-reboot-mode"; + reg = <0x0 0x4>; + + none { + linux,mode = "none"; + loader,magic = <0x77665501>; + }; + + bootloader { + linux,mode = "bootloader"; + loader,magic = <0x77665500>; + }; + + recovery { + linux,mode = "recovery"; + loader,magic = <0x77665502>; + }; + }; + };