From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christopher Bostic Subject: [PATCH v2 1/2] drivers/watchdog: Add optional ASPEED device tree properties Date: Tue, 27 Jun 2017 16:17:33 -0500 Message-ID: <20170627211734.60477-2-cbostic@linux.vnet.ibm.com> References: <20170627211734.60477-1-cbostic@linux.vnet.ibm.com> Return-path: In-Reply-To: <20170627211734.60477-1-cbostic-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: wim-IQzOog9fTRqzQB+pC5nmwQ@public.gmane.org, linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org, robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, mark.rutland-5wv7dgnIgG8@public.gmane.org, joel-U3u1mxZcP9KHXe+LvDLADg@public.gmane.org, linux-watchdog-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: Christopher Bostic , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org Describe device tree optional properties: * aspeed,arm-reet - ARM CPU reset on signal * aspeed,soc-reset - SOC reset on signal * aspeed,sys-reset - System reset on signal Disabling system reset may be required in situations where one of the other watchdog engines in the system is responsible for this. * aspeed,interrupt - Interrupt CPU on signal * aspeed,external-signal - Generate external signal (WDT1 and WDT2 only) * aspeed,alt-boot - Boot from alternate block on signal Signed-off-by: Christopher Bostic --- v2 - Add 'aspeed,' prefix to all optional properties - Add arm-reset, soc-reset, interrupt, alt-boot properties --- .../devicetree/bindings/watchdog/aspeed-wdt.txt | 25 ++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt index c5e74d7..555b8b4 100644 --- a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt +++ b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt @@ -8,9 +8,34 @@ Required properties: - reg: physical base address of the controller and length of memory mapped region +Optional properties: + Signal behavior - Whenever a timeout occurs, the watchdog can be programmed + to generate 6 types of signals: + + - aspeed,arm-reset: If property is present then reset ARM CPU only. + + - aspeed,soc-reset: If property is present then reset SOC. + + - aspeed,sys-reset: If property is present then reset the entire chip. + In cases where one of the other watchdog engines + in the system is responsible for system reset it + may be required to not specify this property. + + - aspeed,interrupt: If property is present then interrupt CPU. + + - aspeed,external-signal: If property is present then signal is sent to + external reset counter (only WDT1 and WDT2). + - aspeed,alt-boot: If property is present then boot from alternate block. + Example: wdt1: watchdog@1e785000 { compatible = "aspeed,ast2400-wdt"; reg = <0x1e785000 0x1c>; + aspeed,arm-reset; + aspeed,soc-reset; + aspeed,sys-reset; + aspeed,interrupt; + aspeed,external-signal; + aspeed,alt-boot; }; -- 1.8.2.2 -- 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