| Message ID | 1409060791-23167-2-git-send-email-p.zabel@pengutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Philipp, On Tue, Aug 26, 2014 at 3:46 PM, Philipp Zabel <p.zabel@pengutronix.de> wrote: > +++ b/Documentation/devicetree/bindings/power/fsl,imx-gpc.txt > @@ -0,0 +1,54 @@ > +IP cores belonging to a power domain should contain a 'power-domain' property power-domains > +that is a phandle pointing to the gpc device node and a DOMAIN_INDEX specifying > +the power domain the device belongs to. > + > +Example of a device that is part of the PU power domain: > + > + vpu: vpu@02040000 { > + reg = <0x02040000 0x3c000>; > + /* ... */ > + power-domain = <&gpc 1>; power-domains > + /* ... */ > + }; Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org 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
Hi Geert, Am Freitag, den 05.09.2014, 13:47 +0200 schrieb Geert Uytterhoeven: > Hi Philipp, > > On Tue, Aug 26, 2014 at 3:46 PM, Philipp Zabel <p.zabel@pengutronix.de> wrote: > > +++ b/Documentation/devicetree/bindings/power/fsl,imx-gpc.txt > > @@ -0,0 +1,54 @@ > > > +IP cores belonging to a power domain should contain a 'power-domain' property > > power-domains > > > +that is a phandle pointing to the gpc device node and a DOMAIN_INDEX specifying > > +the power domain the device belongs to. > > + > > +Example of a device that is part of the PU power domain: > > + > > + vpu: vpu@02040000 { > > + reg = <0x02040000 0x3c000>; > > + /* ... */ > > + power-domain = <&gpc 1>; > > power-domains Thanks, I'll change those. regards Philipp
diff --git a/Documentation/devicetree/bindings/power/fsl,imx-gpc.txt b/Documentation/devicetree/bindings/power/fsl,imx-gpc.txt new file mode 100644 index 0000000..eaa8c93 --- /dev/null +++ b/Documentation/devicetree/bindings/power/fsl,imx-gpc.txt @@ -0,0 +1,54 @@ +Freescale i.MX General Power Controller +======================================= + +The i.MX6Q General Power Control (GPC) block contains DVFS load tracking +counters and Power Gating Control (PGC) for the CPU and PU (GPU/VPU) power +domains. + +Required properties: +- compatible: Should be "fsl,imx6q-gpc" or "fsl,imx6sl-gpc" +- reg: should be register base and length as documented in the + datasheet +- interrupts: Should contain GPC interrupt request 1 +- pu-supply: Link to the LDO regulator powering the PU power domain +- clocks: Clock phandles to devices in the PU power domain that need + to be enabled during domain power-up for reset propagation. +- #power-domain-cells: Should be 1, see below: + +The gpc node is a power-controller as documented by the generic power domain +bindings in Documentation/devicetree/bindings/power/power_domain.txt. + +Example: + + gpc: gpc@020dc000 { + compatible = "fsl,imx6q-gpc"; + reg = <0x020dc000 0x4000>; + interrupts = <0 89 0x04 0 90 0x04>; + pu-supply = <®_pu>; + clocks = <&clks 122>, <&clks 74>, <&clks 121>, + <&clks 26>, <&clks 143>, <&clks 168>; + #power-domain-cells = <1>; + }; + + +Specifying power domain for IP modules +====================================== + +IP cores belonging to a power domain should contain a 'power-domain' property +that is a phandle pointing to the gpc device node and a DOMAIN_INDEX specifying +the power domain the device belongs to. + +Example of a device that is part of the PU power domain: + + vpu: vpu@02040000 { + reg = <0x02040000 0x3c000>; + /* ... */ + power-domain = <&gpc 1>; + /* ... */ + }; + +The following DOMAIN_INDEX values are valid for i.MX6Q: +ARM_DOMAIN 0 +PU_DOMAIN 1 +The following additional DOMAIN_INDEX value is valid for i.MX6SL: +DISPLAY_DOMAIN 2
The i.MX6 contains a power controller that controls power gating and sequencing for the SoC's power domains. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> --- .../devicetree/bindings/power/fsl,imx-gpc.txt | 54 ++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/fsl,imx-gpc.txt