On Thu, Oct 06 2016 at 02:09 -0600, Geert Uytterhoeven wrote:
On Thu, Oct 6, 2016 at 10:06 AM, Geert Uytterhoeven
<geert@xxxxxxxxxxxxxx> wrote:
On Wed, Oct 5, 2016 at 10:31 PM, Lina Iyer <lina.iyer@xxxxxxxxxx> wrote:
Update DT bindings to describe idle states of PM domains.
This patch is based on the original patch by Marc Titinger.
Cc: <devicetree@xxxxxxxxxxxxxxx>
Signed-off-by: Marc Titinger <mtitinger+renesas@xxxxxxxxxxxx>
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Lina Iyer <lina.iyer@xxxxxxxxxx>
Acked-by: Rob Herring <robh@xxxxxxxxxx>
---
.../devicetree/bindings/power/power_domain.txt | 36 ++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/Documentation/devicetree/bindings/power/power_domain.txt b/Documentation/devicetree/bindings/power/power_domain.txt
index 025b5e7..a043315 100644
--- a/Documentation/devicetree/bindings/power/power_domain.txt
+++ b/Documentation/devicetree/bindings/power/power_domain.txt
@@ -29,6 +29,10 @@ Optional properties:
specified by this binding. More details about power domain specifier are
available in the next section.
+- domain-idle-states : A phandle of an idle-state that shall be soaked into a
+ generic domain power state. The idle state definitions are
+ compatible with arm,idle-state specified in [1].
+
Example:
power: power-controller@12340000 {
@@ -59,6 +63,36 @@ The nodes above define two power controllers: 'parent' and 'child'.
Domains created by the 'child' power controller are subdomains of '0' power
domain provided by the 'parent' power controller.
+Example 3:
+ parent: power-controller@12340000 {
With W=1, this is gonna trigger:
Warning (unit_address_vs_reg): Node foo has a unit name, but no reg property
Yes, there are pre-existing users in this file.
Scrap this... switching desktops causes loss of position...
+ compatible = "foo,power-controller";
+ reg = <0x12340000 0x1000>;
+ #power-domain-cells = <1>;
+ domain-idle-states = <&DOMAIN_RET, &DOMAIN_PWR_DN>;
+ };
+ DOMAIN_RET: state@0 {
+ compatible = "arm,idle-state";
+ entry-latency-us = <1000>;
+ exit-latency-us = <2000>;
+ min-residency-us = <10000>;
This one is gonna trigger
Warning (unit_address_vs_reg): Node foo has a unit name, but no reg property
+ };
Its just an example, Will fix the example.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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