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Tue, 22 Mar 2016 19:37:01 +0800 (CST) From: Andy Yan To: robh+dt@kernel.org, sre@kernel.org, heiko@sntech.de, john.stultz@linaro.org, arnd@arndb.de Subject: [PATCH v6 1/4] dt-bindings: power: reset: add document for reboot-mode driver Date: Tue, 22 Mar 2016 19:36:32 +0800 Message-Id: <1458646592-540-1-git-send-email-andy.yan@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1458646525-491-1-git-send-email-andy.yan@rock-chips.com> References: <1458646525-491-1-git-send-email-andy.yan@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160322_043731_247939_8F47B792 X-CRM114-Status: GOOD ( 11.32 ) X-Spam-Score: -1.9 (-) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, catalin.marinas@arm.com, will.deacon@arm.com, alexandre.belloni@free-electrons.com, f.fainelli@gmail.com, linux@arm.linux.org.uk, dbaryshkov@gmail.com, linux-pm@vger.kernel.org, linux-rockchip@lists.infradead.org, wxt@rock-chips.com, devicetree@vger.kernel.org, pawel.moll@arm.com, ijc+devicetree@hellion.org.uk, lorenzo.pieralisi@arm.com, matthias.bgg@gmail.com, linux-arm-kernel@lists.infradead.org, moritz.fischer@ettus.com, mbrugger@suse.com, linux-kernel@vger.kernel.org, galak@codeaurora.org, olof@lixom.net, Andy Yan , jun.nie@linaro.org, dwmw2@infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP add device tree bindings document for reboot-mode driver Signed-off-by: Andy Yan Acked-by: Rob Herring binding --- Changes in v6: - fix a typo with "property" - describe property "mask" more clear Changes in v5: - delete a unnecessary blank line in syscon-reboot-mode.txt - rename mode-fastoboot to mode-bootloader in syscon-reboot-mode.txt - rename macro BOOT_LOADER to BOOT_BL_DOWNLOAD, which gives a more clear mean Changes in v4: - remove mode-maskrom - rename mode-fastboot to mode-bootloader to keep compatible with the exiting Android device Changes in v3: - descirbe all reboot mode as properity instead of subnode Changes in v2: None Changes in v1: None .../bindings/power/reset/reboot-mode.txt | 24 +++++++++++++++ .../bindings/power/reset/syscon-reboot-mode.txt | 35 ++++++++++++++++++++++ 2 files changed, 59 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/reset/reboot-mode.txt create mode 100644 Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.txt diff --git a/Documentation/devicetree/bindings/power/reset/reboot-mode.txt b/Documentation/devicetree/bindings/power/reset/reboot-mode.txt new file mode 100644 index 0000000..3457949 --- /dev/null +++ b/Documentation/devicetree/bindings/power/reset/reboot-mode.txt @@ -0,0 +1,24 @@ +Generic reboot mode core map driver + +This driver get reboot mode arguments and call the write +interface to stores the magic value in special register +or ram . Then the bootloader can read it and take different +action according the argument stored. + +All mode properties are vendor specific, it is a indication to tell +the bootloder what to do when the system reboot, and should be named +as mode-xxx = (xxx is mode name). + +- mode-normal: Normal reboot mode, system reboot with command "reboot". +- mode-recovery: Android Recovery mode, it is a mode to format the device or update a new image. +- mode-bootloader: Android fastboot mode, it's a mode to re-flash partitions on the Android based device. +- mode-loader: A bootloader mode, it's a mode used to download image on Rockchip platform, + usually used in development. + +Example: + reboot-mode { + mode-normal = ; + mode-recovery = ; + mode-bootloader = ; + mode-loader = ; + } diff --git a/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.txt b/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.txt new file mode 100644 index 0000000..eb28469 --- /dev/null +++ b/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.txt @@ -0,0 +1,35 @@ +SYSCON reboot mode driver + +This driver get reboot mode magic value form reboot-mode driver +and stores it in a SYSCON mapped register. 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 "syscon", "simple-mfd" +node. + +Required properties: +- compatible: should be "syscon-reboot-mode" +- offset: offset in the register map for the storage register (in bytes) + +Optional property: +- mask: bits mask of the bits in the register to store the reboot mode magic value, + default set to 0xffffffff if missing. + +The rest of the properties should follow the generic reboot-mode discription +found in reboot-mode.txt + +Example: + pmu: pmu@20004000 { + compatible = "rockchip,rk3066-pmu", "syscon", "simple-mfd"; + reg = <0x20004000 0x100>; + + reboot-mode { + compatible = "syscon-reboot-mode"; + offset = <0x40>; + mode-normal = ; + mode-recovery = ; + mode-bootloader = ; + mode-loader = ; + }; + };