On Mon, Feb 06, 2017 at 07:05:29AM -0800, Andrey Smirnov wrote: > Add code allowing for control of various power domains managed by GPCv2 > IP block found in i.MX7 series of SoCs. Power domains covered by this > patch are: > > - PCIE PHY > - MIPI PHY > - USB HSIC PHY > - USB OTG1/2 PHY > > Support for any other power domain controlled by GPC is not present, and > can be added at some later point. > > Testing of this code was done against a PCIe driver. > > Cc: yurovsky@xxxxxxxxx > Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx> > Cc: Rob Herring <robh+dt@xxxxxxxxxx> > Cc: Mark Rutland <mark.rutland@xxxxxxx> > Cc: Fabio Estevam <fabio.estevam@xxxxxxx> > Cc: devicetree@xxxxxxxxxxxxxxx > Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > Cc: linux-kernel@xxxxxxxxxxxxxxx > Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx> > --- > > Shawn: > > Since this driver was modlelled after analogous driver for i.MX6 from > Lucas Stach > > https://www.spinics.net/lists/arm-kernel/msg558548.html > > I made this patch to be applied on top of his. Please let me know if > that was a bad idea. > > > .../devicetree/bindings/power/fsl,imx-gpcv2.txt | 73 ++++ > drivers/soc/imx/Makefile | 2 +- > drivers/soc/imx/gpcv2.c | 380 +++++++++++++++++++++ > include/dt-bindings/power/imx7-power.h | 18 + > 4 files changed, 472 insertions(+), 1 deletion(-) > create mode 100644 Documentation/devicetree/bindings/power/fsl,imx-gpcv2.txt > create mode 100644 drivers/soc/imx/gpcv2.c > create mode 100644 include/dt-bindings/power/imx7-power.h > > diff --git a/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.txt b/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.txt > new file mode 100644 > index 0000000..949e190 > --- /dev/null > +++ b/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.txt > @@ -0,0 +1,73 @@ > +Freescale i.MX General Power Controller v2 > +========================================== > + > +The i.MX7S/D General Power Control (GPC) block contains Power Gating > +Control (PGC) for various power domains. > + > +Required properties: > + > +- compatible: Should be "fsl,imx7d-gpc" > + > +- reg: should be register base and length as documented in the > + datasheet > + > +- interrupts: Should contain GPC interrupt request 1 > + > +- #power-domain-cells: Should be 1, see below: Should be 1 or ... > + > +Power domains contained within GPC node are generic power domain > +providers, documented in > +Documentation/devicetree/bindings/power/power_domain.txt, which are > +described as subnoded of the power gating controller 'pgc' node, s/subnoded/subnodes/ > +which, in turn, is expected to conatine the following: s/conatine/contain/ > + > +Required properties: > + > +- reg: Power domain index. Valid values are defined in > + include/dt-bindings/power/imx7-power.h > + > +- #power-domain-cells: Should be 0 ... 0? > + > +Optional properties: > + > +- power-supply: Power supply used to power the domain > + > +Example: > + > + gpc: gpc@303a0000 { > + compatible = "fsl,imx7d-gpc"; > + reg = <0x303a0000 0x10000>; > + interrupt-controller; > + interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>; > + #interrupt-cells = <3>; > + interrupt-parent = <&intc>; > + > + pgc { > + #address-cells = <1>; > + #size-cells = <0>; > + > + pgc_pcie_phy: pgc-pcie-phy-domain { > + #power-domain-cells = <0>; > + > + reg = <IMX7_POWER_DOMAIN_PCIE_PHY>; > + power-supply = <®_1p0d>; > + }; > + }; > + }; > + > + > +Specifying power domain for IP modules > +====================================== > + > +IP cores belonging to a power domain should contain a 'power-domains' > +property that is a phandle for PGC node representing the domain. > + > +Example of a device that is part of the PCIE_PHY power domain: > + > + pcie: pcie@0x33800000 { > + reg = <0x33800000 0x4000>, > + <0x4ff00000 0x80000>; > + /* ... */ > + power-domains = <&pgc_pcie_phy>; > + /* ... */ > + }; -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
