On 05/22/2014 09:03 PM, Sergei Shtylyov wrote:
Hello.
On 05/22/2014 08:44 PM, Ivan Khoronzhuk wrote:
This node is intended to allow SoC reset in case of software reset
or appropriate watchdogs.
The Keystone SoCs can contain up to 4 watchdog timers to reset
SoC. Each watchdog timer event input is connected to the Reset Mux
block. The Reset Mux block can be configured to cause reset or not.
Additionally soft or hard reset can be configured.
Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@xxxxxx>
---
.../bindings/power/reset/keystone-reset.txt | 67
++++++++++++++++++++++
1 file changed, 67 insertions(+)
create mode 100644
Documentation/devicetree/bindings/power/reset/keystone-reset.txt
diff --git
a/Documentation/devicetree/bindings/power/reset/keystone-reset.txt
b/Documentation/devicetree/bindings/power/reset/keystone-reset.txt
new file mode 100644
index 0000000..a8a0c31
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/reset/keystone-reset.txt
@@ -0,0 +1,67 @@
+* Device tree bindings for Texas Instruments keystone reset
+
+This node is intended to allow SoC reset in case of software reset
+of selected watchdogs.
+
+The Keystone SoCs can contain up to 4 watchdog timers to reset
+SoC. Each watchdog timer event input is connected to the Reset Mux
+block. The Reset Mux block can be configured to cause reset or not.
+
+Additionally soft or hard reset can be configured.
+
+Required properties:
+
+- compatible: ti,keystone-reset
+
+- ti,syscon-pll: phandle/offset pair. The phandle to syscon used to
+ access pll controller registers and the offset to use
+ reset control registers.
+
+- ti,syscon-dev: phandle/offset pair. The phandle to syscon used to
+ access device state control registers and the offset
+ in order to use mux block registers for all watchdogs.
+
+Optional properties:
+
+- ti,soft-reset: Boolean option indicating soft reset.
+ By default hard reset is used.
+
+- ti,wdt_list: WDT list that can cause SoC reset. It's not
related
Hm, why underscore in this property while hyphens are used in the
others? Hyphen is generally preferrable in the device tree names...
Yes. You are right. I'll correct
Thanks!
+ to WDT driver, it's just needed to enable a SoC related
+ reset that's triggered by one of WDTs. The list is
+ in format: <0>, <2>; It can be in random order and
+ begins from 0 to 3, as keystone can contain up to 4 SoC
+ reset watchdogs and can be in random order.
WBR, Sergei
--
Regards,
Ivan Khoronzhuk
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