[PATCH 4/4] Documentation: atmel-at91: add DT bindings for fast startup
From: robh@kernel.org (Rob Herring)
Date: 2016-01-29 16:20:17
Also in:
linux-clk, linux-devicetree, lkml
On Thu, Jan 28, 2016 at 06:19:16PM +0800, Wenyou Yang wrote:
quoted hunk ↗ jump to hunk
Add DT bindings to configurate the PMC_FSMR and PMC_FSPR registers to trigger a fast restart signal to PMC. Signed-off-by: Wenyou Yang <redacted> --- .../devicetree/bindings/arm/atmel-pmc.txt | 74 ++++++++++++++++++++ 1 file changed, 74 insertions(+)diff --git a/Documentation/devicetree/bindings/arm/atmel-pmc.txt b/Documentation/devicetree/bindings/arm/atmel-pmc.txt index 795cc78..8d45ff9f 100644 --- a/Documentation/devicetree/bindings/arm/atmel-pmc.txt +++ b/Documentation/devicetree/bindings/arm/atmel-pmc.txt@@ -12,3 +12,77 @@ Examples: compatible = "atmel,at91rm9200-pmc"; reg = <0xfffffc00 0x100>; }; + +PMC Fast Startup Signals + +The PMC Fast Start Signals are used as the wake up source to trigger the PMC +to wake up the system from the ULP1 mode. + +required properties: +- compatible: Should be "atmel,sama5d2-pmc-fast-startup".
Why the compatible? Does this correspond to some h/w block rather than features of the PMC? If it is simply because you want to have a separate driver, that is not a good reason.
+ +optional properties: +- atmel,fast-startup-wake-up: boolean to enable the WKUP pin to trigger + a fast restart signal to the PMC. +- atmel,fast-startup-secumod: boolean to enable the Security Mode to trigger + a fast restart signal to the PMC. +- atmel,fast-startup-piobu0: boolean to enable the PIOBU0 Input to trigger + a fast restart signal to the PMC. +- atmel,fast-startup-piobu1: boolean to enable the PIOBU1 Input to trigger + a fast restart signal to the PMC. +- atmel,fast-startup-piobu2: boolean to enable the PIOBU2 Input to trigger + a fast restart signal to the PMC. +- atmel,fast-startup-piobu3: boolean to enable the PIOBU3 Input to trigger + a fast restart signal to the PMC. +- atmel,fast-startup-piobu4: boolean to enable the PIOBU4 Input to trigger + a fast restart signal to the PMC. +- atmel,fast-startup-piobu5: boolean to enable the PIOBU5 Input to trigger + a fast restart signal to the PMC. +- atmel,fast-startup-piobu6: boolean to enable the PIOBU6 Input to trigger + a fast restart signal to the PMC. +- atmel,fast-startup-piobu7: boolean to enable the PIOBU7 Input to trigger + a fast restart signal to the PMC. +- atmel,fast-startup-gmac-wol: boolean to enable the GMAC Wake-up On LAN + to trigger a fast restart signal to the PMC. +- atmel,fast-startup-rtc-alarm: boolean to enable the RTC Alarm to trigger + a fast restart signal to the PMC. +- atmel,fast-startup-usb-resume: boolean to enable the USB Resume to trigger + a fast restart signal to the PMC. +- atmel,fast-startup-sdmmc-cd: boolean to enable the SDMMC Card Detect + to trigger a fast restart signal to the PMC. +- atmel,fast-startup-rxlp-match: boolean to enable the Backuo UART Receive + Match Condition to trigger a fast restart signal to the PMC. +- atmel,fast-startup-acc-comparison: boolean to enable the Analog Comparator + Controller (ACC) Comparison to to trigger a fast restart signal to the PMC. + +- atmel,fast-startup-wkup-pin-high: boolean to indicate if the WKUP Pin is + in the high level to trigger fast restart signal, otherwise low level.
Perhaps just make the above bool properties take a value to indicate high or low triggered.
+- atmel,fast-startup-piobu0-high: boolean to indicate if the PIOBU0 Pin is + in the high level to trigger fast restart signal, otherwise low level. +- atmel,fast-startup-piobu1-high: boolean to indicate if the PIOBU1 Pin is + in the high level to trigger fast restart signal, otherwise low level. +- atmel,fast-startup-piobu2-high: boolean to indicate if the PIOBU2 Pin is + in the high level to trigger fast restart signal, otherwise low level. +- atmel,fast-startup-piobu3-high: boolean to indicate if the PIOBU3 Pin is + in the high level to trigger fast restart signal, otherwise low level. +- atmel,fast-startup-piobu4-high: boolean to indicate if the PIOBU4 Pin is + in the high level to trigger fast restart signal, otherwise low level. +- atmel,fast-startup-piobu5-high: boolean to indicate if the PIOBU5 Pin is + in the high level to trigger fast restart signal, otherwise low level. +- atmel,fast-startup-piobu6-high: boolean to indicate if the PIOBU6 Pin is + in the high level to trigger fast restart signal, otherwise low level. +- atmel,fast-startup-piobu7-high: boolean to indicate if the PIOBU7 Pin is + in the high level to trigger fast restart signal, otherwise low level.
This would be a long list in the DT if you set all these properties. Perhaps this should all be expressed in a more compact form.
+
+Example:
+
+ pmc: pmc at f0014000 {
+ compatible = "atmel,sama5d2-pmc";
+ reg = <0xf0014000 0x160>;
+
+ pmc_fast_restart {
+ compatible = "atmel,sama5d2-pmc-fast-startup";
+ atmel,fast-startup-wake-up;
+ atmel,fast-startup-rtc-alarm;
+ };
+ };
--
1.7.9.5