mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-09-03 17:51:23 +00:00
35b2b3328c
Add unique identifiers for exynos7870 clocks for every bank. It adds all clocks of CMU_MIF, CMU_DISPAUD, CMU_G3D, CMU_ISP, CMU_MFCMSCL, and CMU_PERI. Document the devicetree bindings as well. Signed-off-by: Kaustabh Chakraborty <kauschluss@disroot.org> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20250301-exynos7870-pmu-clocks-v5-1-715b646d5206@disroot.org Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
228 lines
6.0 KiB
YAML
228 lines
6.0 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
|
|
%YAML 1.2
|
|
---
|
|
$id: http://devicetree.org/schemas/clock/samsung,exynos7870-cmu.yaml#
|
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
|
|
|
title: Samsung Exynos7870 SoC clock controller
|
|
|
|
maintainers:
|
|
- Kaustabh Chakraborty <kauschluss@disroot.org>
|
|
|
|
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
|
|
include/dt-bindings/clock/samsung,exynos7870-cmu.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
|
|
- clocks
|
|
- clock-names
|
|
- "#clock-cells"
|
|
- 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
|
|
|
|
- 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/samsung,exynos7870-cmu.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>;
|
|
};
|
|
|
|
...
|