From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Yan Subject: [PATCH v5 1/4] dt-bindings: power: reset: add document for reboot-mode driver Date: Tue, 8 Mar 2016 20:23:05 +0800 Message-ID: <1457439785-8133-1-git-send-email-andy.yan@rock-chips.com> References: <1457439716-8084-1-git-send-email-andy.yan@rock-chips.com> Return-path: In-Reply-To: <1457439716-8084-1-git-send-email-andy.yan-TNX95d0MmH7DzftRWevZcw@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, john.stultz-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, arnd-r2nGTMty4D4@public.gmane.org, heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org Cc: pawel.moll-5wv7dgnIgG8@public.gmane.org, mark.rutland-5wv7dgnIgG8@public.gmane.org, ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org, galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, catalin.marinas-5wv7dgnIgG8@public.gmane.org, olof-nZhT3qVonbNeoWH0uzbU5w@public.gmane.org, alexandre.belloni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org, dbaryshkov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, sre-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, jun.nie-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, edubezval-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, f.fainelli-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, will.deacon-5wv7dgnIgG8@public.gmane.org, linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, wxt-TNX95d0MmH7DzftRWevZcw@public.gmane.org, matthias.bgg-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org, lorenzo.pieralisi-5wv7dgnIgG8@public.gmane.org, moritz.fischer-+aYTwkv1SeIAvxtiuMwx3w@public.gmane.org, richard-/L3Ra7n9ekc@public.gmane.org, dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org, jwerner-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, Andy Yan List-Id: devicetree@vger.kernel.org add device tree bindings document for reboot-mode driver Signed-off-by: Andy Yan --- Changes in v5: - delete a unnecessary blank line 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 | 34 ++++++++++++++++++++++ 2 files changed, 58 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..d03cb52 --- /dev/null +++ b/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.txt @@ -0,0 +1,34 @@ +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 properity: +- mask: the mask bits of the 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 = ; + }; + }; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html