| Message ID | 20190620172250.9102-5-vigneshr@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | MTD: Add Initial HyperBus support | expand |
On 06/20/2019 08:22 PM, Vignesh Raghavendra wrote: > Add binding documentation for TI's HyperBus memory controller present on > AM654 SoC. > > Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> > --- > > v7: Fix example to move HyperBus node out of syscon > v6: Use generic names for bindings > > .../devicetree/bindings/mtd/ti,am654-hbmc.txt | 52 +++++++++++++++++++ > MAINTAINERS | 1 + > 2 files changed, 53 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt > > diff --git a/Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt b/Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt > new file mode 100644 > index 000000000000..d424a0b88ab6 > --- /dev/null > +++ b/Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt [...] > +Example: > + > + system-controller@47000000 { > + compatible = "syscon", "simple-mfd"; > + reg = <0x0 0x47000000 0x0 0x100>; > + #address-cells = <2>; > + #size-cells = <2>; > + ranges; > + > + hbmc_mux: multiplexer { > + compatible = "mmio-mux"; > + #mux-control-cells = <1>; > + mux-reg-masks = <0x4 0x2>; /* 0: reg 0x4, bit 1 */ > + }; > + Empty line not needed here. > + }; > + > + hbmc: hyperbus@47034000 { > + compatible = "ti,am654-hbmc"; > + reg = <0x0 0x47034000 0x0 0x100>, > + <0x5 0x00000000 0x1 0x0000000>; > + power-domains = <&k3_pds 55>; > + #address-cells = <2>; > + #size-cells = <1>; > + ranges = <0x0 0x0 0x5 0x00000000 0x4000000>, /* CS0 - 64MB */ > + <0x1 0x0 0x5 0x04000000 0x4000000>; /* CS1 - 64MB */ > + mux-controls = <&hbmc_mux 0>; > + > + /* Slave flash node */ Overindented. > + flash@0,0 { > + compatible = "cypress,hyperflash", "cfi-flash"; > + reg = <0x0 0x0 0x4000000>; > + }; > + }; [...] MBR, Sergei
diff --git a/Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt b/Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt new file mode 100644 index 000000000000..d424a0b88ab6 --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt @@ -0,0 +1,52 @@ +Bindings for HyperBus Memory Controller (HBMC) on TI's K3 family of SoCs + +Required properties: +- compatible : "ti,am654-hbmc" for AM654 SoC +- reg : Two entries: + First entry pointed to the register space of HBMC controller + Second entry pointing to the memory map region dedicated for + MMIO access to attached flash devices +- ranges : Address translation from offset within CS to allocated MMIO + space in SoC + +Optional properties: +- mux-controls : phandle to the multiplexer that controls selection of + HBMC vs OSPI inside Flash SubSystem (FSS). Default is OSPI, + if property is absent. + See Documentation/devicetree/bindings/mux/reg-mux.txt + for mmio-mux binding details + +Example: + + system-controller@47000000 { + compatible = "syscon", "simple-mfd"; + reg = <0x0 0x47000000 0x0 0x100>; + #address-cells = <2>; + #size-cells = <2>; + ranges; + + hbmc_mux: multiplexer { + compatible = "mmio-mux"; + #mux-control-cells = <1>; + mux-reg-masks = <0x4 0x2>; /* 0: reg 0x4, bit 1 */ + }; + + }; + + hbmc: hyperbus@47034000 { + compatible = "ti,am654-hbmc"; + reg = <0x0 0x47034000 0x0 0x100>, + <0x5 0x00000000 0x1 0x0000000>; + power-domains = <&k3_pds 55>; + #address-cells = <2>; + #size-cells = <1>; + ranges = <0x0 0x0 0x5 0x00000000 0x4000000>, /* CS0 - 64MB */ + <0x1 0x0 0x5 0x04000000 0x4000000>; /* CS1 - 64MB */ + mux-controls = <&hbmc_mux 0>; + + /* Slave flash node */ + flash@0,0 { + compatible = "cypress,hyperflash", "cfi-flash"; + reg = <0x0 0x0 0x4000000>; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 58c6ad3dae66..0d5a8c36682d 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -7359,6 +7359,7 @@ S: Supported F: drivers/mtd/hyperbus/ F: include/linux/mtd/hyperbus.h F: Documentation/devicetree/bindings/mtd/cypress,hyperflash.txt +F: Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt HYPERVISOR VIRTUAL CONSOLE DRIVER L: linuxppc-dev@lists.ozlabs.org
Add binding documentation for TI's HyperBus memory controller present on AM654 SoC. Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> --- v7: Fix example to move HyperBus node out of syscon v6: Use generic names for bindings .../devicetree/bindings/mtd/ti,am654-hbmc.txt | 52 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 53 insertions(+) create mode 100644 Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt