On Tue, Sep 17, 2019 at 12:43:42PM +0200, Ulrich Hecht wrote:
>
> > On September 16, 2019 at 5:33 PM Simon Horman <[email protected]>
> > wrote:
> >
> >
> > Convert Renesas Bus State Controller (BSC) bindings documentation to
> > json-schema.
> >
> > Signed-off-by: Simon Horman <[email protected]>
> > ---
> > * Tested using:
> > # ARCH=arm64 make dtbs_check
> > DT_SCHEMA_FILES=Documentation/devicetree/bindings/bus/renesas,bsc.yaml
> > # ARCH=arm make dtbs_check
> > DT_SCHEMA_FILES=Documentation/devicetree/bindings/bus/renesas,bsc.yaml
> > ---
> > .../devicetree/bindings/bus/renesas,bsc.txt | 46 -----------------
> > .../devicetree/bindings/bus/renesas,bsc.yaml | 57
> > ++++++++++++++++++++++
> > 2 files changed, 57 insertions(+), 46 deletions(-)
> > delete mode 100644 Documentation/devicetree/bindings/bus/renesas,bsc.txt
> > create mode 100644 Documentation/devicetree/bindings/bus/renesas,bsc.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/bus/renesas,bsc.txt
> > b/Documentation/devicetree/bindings/bus/renesas,bsc.txt
> > deleted file mode 100644
> > index 90e947269437..000000000000
> > --- a/Documentation/devicetree/bindings/bus/renesas,bsc.txt
> > +++ /dev/null
> > @@ -1,46 +0,0 @@
> > -Renesas Bus State Controller (BSC)
> > -==================================
> > -
> > -The Renesas Bus State Controller (BSC, sometimes called "LBSC within Bus
> > -Bridge", or "External Bus Interface") can be found in several Renesas ARM
> > SoCs.
> > -It provides an external bus for connecting multiple external devices to the
> > -SoC, driving several chip select lines, for e.g. NOR FLASH, Ethernet and
> > USB.
> > -
> > -While the BSC is a fairly simple memory-mapped bus, it may be part of a PM
> > -domain, and may have a gateable functional clock.
> > -Before a device connected to the BSC can be accessed, the PM domain
> > -containing the BSC must be powered on, and the functional clock
> > -driving the BSC must be enabled.
> > -
> > -The bindings for the BSC extend the bindings for "simple-pm-bus".
> > -
> > -
> > -Required properties
> > - - compatible: Must contain an SoC-specific value, and "renesas,bsc" and
> > - "simple-pm-bus" as fallbacks.
> > - SoC-specific values can be:
> > - "renesas,bsc-r8a73a4" for R-Mobile APE6 (r8a73a4)
> > - "renesas,bsc-sh73a0" for SH-Mobile AG5 (sh73a0)
> > - - #address-cells, #size-cells, ranges: Must describe the mapping between
> > - parent address and child address spaces.
> > - - reg: Must contain the base address and length to access the bus
> > controller.
> > -
> > -Optional properties:
> > - - interrupts: Must contain a reference to the BSC interrupt, if
> > available.
> > - - clocks: Must contain a reference to the functional clock, if available.
> > - - power-domains: Must contain a reference to the PM domain, if available.
> > -
> > -
> > -Example:
> > -
> > - bsc: bus@fec10000 {
> > - compatible = "renesas,bsc-sh73a0", "renesas,bsc",
> > - "simple-pm-bus";
> > - #address-cells = <1>;
> > - #size-cells = <1>;
> > - ranges = <0 0 0x20000000>;
> > - reg = <0xfec10000 0x400>;
> > - interrupts = <0 39 IRQ_TYPE_LEVEL_HIGH>;
> > - clocks = <&zb_clk>;
> > - power-domains = <&pd_a4s>;
> > - };
> > diff --git a/Documentation/devicetree/bindings/bus/renesas,bsc.yaml
> > b/Documentation/devicetree/bindings/bus/renesas,bsc.yaml
> > new file mode 100644
> > index 000000000000..0231a15cac47
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/bus/renesas,bsc.yaml
> > @@ -0,0 +1,57 @@
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/bus/renesas,bsc.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Renesas Bus State Controller (BSC)
> > +
> > +maintainers:
> > + - Geert Uytterhoeven <[email protected]>
> > +
> > +description: |
> > + The Renesas Bus State Controller (BSC, sometimes called "LBSC within Bus
> > + Bridge", or "External Bus Interface") can be found in several Renesas ARM
> > + SoCs. It provides an external bus for connecting multiple external
> > + devices to the SoC, driving several chip select lines, for e.g. NOR
> > + FLASH, Ethernet and USB.
> > +
> > + While the BSC is a fairly simple memory-mapped bus, it may be part of a
> > + PM domain, and may have a gateable functional clock. Before a device
> > + connected to the BSC can be accessed, the PM domain containing the BSC
> > + must be powered on, and the functional clock driving the BSC must be
> > + enabled.
> > +
> > + The bindings for the BSC extend the bindings for "simple-pm-bus".
> > +
> > +allOf:
> > + - $ref: simple-pm-bus.yaml#
> > +
> > +properties:
> > + compatible:
> > + items:
> > + - enum:
> > + - renesas,bsc-r8a73a4 # R-Mobile APE6 (r8a73a4)
> > + - renesas,bsc-sh73a0 # SH-Mobile AG5 (sh73a0)
> > + - const: renesas,bsc
> > + - const: simple-pm-bus
> > +
> > + reg:
> > + maxItems: 1
> > +
> > + interrupts:
> > + maxItems: 1
> > +
>
> Shouldn't there be a "required:" section here?
Thanks, I will add:
required:
- compatible
- '#address-cells'
- '#size-cells'
- ranges
- reg
> > +examples:
> > + - |
> > + #include <dt-bindings/interrupt-controller/irq.h>
> > +
> > + bsc: bus@fec10000 {
> > + compatible = "renesas,bsc-sh73a0", "renesas,bsc", "simple-pm-bus";
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + ranges = <0 0 0x20000000>;
> > + reg = <0xfec10000 0x400>;
> > + interrupts = <0 39 IRQ_TYPE_LEVEL_HIGH>;
> > + clocks = <&zb_clk>;
> > + power-domains = <&pd_a4s>;
> > + };
> > --
> > 2.11.0
> >
>
> CU
> Uli
>
