Messages in this thread Patch in this message | | | From | Ivan Mikhaylov <> | Subject | [PATCH v2 4/4] dt-bindings/watchdog: Add access_cs0 option for alt-boot | Date | Mon, 26 Aug 2019 13:46:36 +0300 |
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The option for the ast2400/2500 to get access to CS0 at runtime.
Signed-off-by: Ivan Mikhaylov <i.mikhaylov@yadro.com> --- Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt index c5077a1f5cb3..023a9b578df6 100644 --- a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt +++ b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt @@ -34,6 +34,13 @@ Optional properties: engine is responsible for this. - aspeed,alt-boot: If property is present then boot from alternate block. + At alternate side 'access_cs0' sysfs file provides: + ast2400: a way to get access to the primary SPI flash + chip at CS0 after booting from the alternate + chip at CS1. + ast2500: a way to restore the normal address mapping from + (CS0->CS1, CS1->CS0) to (CS0->CS0, CS1->CS1). + - aspeed,external-signal: If property is present then signal is sent to external reset counter (only WDT1 and WDT2). If not specified no external signal is sent. -- 2.20.1
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