Provide dt-schema documentation for Exynos7870 SoC clock controller. Signed-off-by: Kaustabh Chakraborty <kauschluss@xxxxxxxxxxx> --- .../bindings/clock/samsung,exynos7870-clock.yaml | 227 +++++++++++++++++++++ 1 file changed, 227 insertions(+) diff --git a/Documentation/devicetree/bindings/clock/samsung,exynos7870-clock.yaml b/Documentation/devicetree/bindings/clock/samsung,exynos7870-clock.yaml new file mode 100644 index 0000000000000000000000000000000000000000..9361723f4f880de0b7127e6ab8f770990c9720e3 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/samsung,exynos7870-clock.yaml @@ -0,0 +1,227 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/clock/samsung,exynos7870-clock.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Samsung Exynos7870 SoC clock controller + +maintainers: + - Kaustabh Chakraborty <kauschluss@xxxxxxxxxxx> + +description: | + Exynos7870 clock controller is comprised of several CMU units, generating + clocks for different domains. Those CMU units are modeled as separate device + tree nodes, and might depend on each other. The root clock in that root tree + is an external clock: OSCCLK (26 MHz). This external clock must be defined + as a fixed-rate clock in dts. + + Each clock is assigned an identifier and client nodes can use this identifier + to specify the clock which they consume. All clocks available for usage + in clock consumer nodes are defined as preprocessor macros in + 'dt-bindings/clock/exynos7870.h' header. + +properties: + compatible: + enum: + - samsung,exynos7870-cmu-mif + - samsung,exynos7870-cmu-dispaud + - samsung,exynos7870-cmu-fsys + - samsung,exynos7870-cmu-g3d + - samsung,exynos7870-cmu-isp + - samsung,exynos7870-cmu-mfcmscl + - samsung,exynos7870-cmu-peri + + clocks: + minItems: 1 + maxItems: 10 + + clock-names: + minItems: 1 + maxItems: 10 + + "#clock-cells": + const: 1 + + reg: + maxItems: 1 + +required: + - compatible + - "#clock-cells" + - clocks + - clock-names + - reg + +allOf: + - if: + properties: + compatible: + contains: + const: samsung,exynos7870-cmu-mif + then: + properties: + clocks: + items: + - description: External reference clock (26 MHz) + + clock-names: + items: + - const: oscclk + + - if: + properties: + compatible: + contains: + const: samsung,exynos7870-cmu-dispaud + then: + properties: + clocks: + items: + - description: External reference clock (26 MHz) + - description: CMU_DISPAUD bus clock (from CMU_MIF) + - description: DECON external clock (from CMU_MIF) + - description: DECON vertical clock (from CMU_MIF) + + clock-names: + items: + - const: oscclk + - const: bus + - const: decon_eclk + - const: decon_vclk + + - if: + properties: + compatible: + contains: + const: samsung,exynos7870-cmu-fsys + then: + properties: + clocks: + items: + - description: External reference clock (26 MHz) + - description: CMU_FSYS bus clock (from CMU_MIF) + - description: USB20DRD clock (from CMU_MIF) + + clock-names: + items: + - const: oscclk + - const: bus + - const: usb20drd_refclk + + - if: + properties: + compatible: + contains: + const: samsung,exynos7870-cmu-g3d + then: + properties: + clocks: + items: + - description: External reference clock (26 MHz) + - description: G3D switch clock (from CMU_MIF) + + clock-names: + items: + - const: oscclk + - const: switch + + - if: + properties: + compatible: + contains: + const: samsung,exynos7870-cmu-isp + then: + properties: + clocks: + items: + - description: External reference clock (26 MHz) + - description: ISP camera clock (from CMU_MIF) + - description: ISP clock (from CMU_MIF) + - description: ISP VRA clock (from CMU_MIF) + + clock-names: + items: + - const: oscclk + - const: cam + - const: isp + - const: vra + + - if: + properties: + compatible: + contains: + const: samsung,exynos7870-cmu-mfcmscl + then: + properties: + clocks: + items: + - description: External reference clock (26 MHz) + - description: MSCL clock (from CMU_MIF) + - description: MFC clock (from CMU_MIF) + + clock-names: + items: + - const: oscclk + - const: mfc + - const: mscl + + - if: + properties: + compatible: + contains: + const: samsung,exynos7870-cmu-peri + then: + properties: + clocks: + items: + - description: External reference clock (26 MHz) + - description: CMU_PERI bus clock (from CMU_MIF) + - description: SPI0 clock (from CMU_MIF) + - description: SPI1 clock (from CMU_MIF) + - description: SPI2 clock (from CMU_MIF) + - description: SPI3 clock (from CMU_MIF) + - description: SPI4 clock (from CMU_MIF) + - description: UART0 clock (from CMU_MIF) + - description: UART1 clock (from CMU_MIF) + - description: UART2 clock (from CMU_MIF) + + clock-names: + items: + - const: oscclk + - const: bus + - const: spi0 + - const: spi1 + - const: spi2 + - const: spi3 + - const: spi4 + - const: uart0 + - const: uart1 + - const: uart2 + +additionalProperties: false + +examples: + - | + #include <dt-bindings/clock/exynos7870.h> + + cmu_peri: clock-controller@101f0000 { + compatible = "samsung,exynos7870-cmu-peri"; + reg = <0x101f0000 0x1000>; + #clock-cells = <1>; + + clock-names = "oscclk", "bus", "spi0", "spi1", "spi2", + "spi3", "spi4", "uart0", "uart1", "uart2"; + clocks = <&oscclk>, + <&cmu_mif CLK_GOUT_MIF_CMU_PERI_BUS>, + <&cmu_mif CLK_GOUT_MIF_CMU_PERI_SPI0>, + <&cmu_mif CLK_GOUT_MIF_CMU_PERI_SPI1>, + <&cmu_mif CLK_GOUT_MIF_CMU_PERI_SPI2>, + <&cmu_mif CLK_GOUT_MIF_CMU_PERI_SPI3>, + <&cmu_mif CLK_GOUT_MIF_CMU_PERI_SPI4>, + <&cmu_mif CLK_GOUT_MIF_CMU_PERI_UART0>, + <&cmu_mif CLK_GOUT_MIF_CMU_PERI_UART1>, + <&cmu_mif CLK_GOUT_MIF_CMU_PERI_UART2>; + }; + +... -- 2.48.1
