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Date: Mon, 19 Aug 2019 14:18:59 -0500
From: Rob Herring <robh+dt@...nel.org>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc: Stephen Boyd <sboyd@...nel.org>,
Michael Turquette <mturquette@...libre.com>,
linux-clk <linux-clk@...r.kernel.org>,
"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
devicetree@...r.kernel.org, haitao.suo@...main.com,
darren.tsao@...main.com, fisher.cheng@...main.com,
alec.lin@...main.com
Subject: Re: [PATCH v3 4/8] dt-bindings: clock: Add devicetree binding for
BM1880 SoC
On Mon, Aug 19, 2019 at 8:02 AM Manivannan Sadhasivam
<manivannan.sadhasivam@...aro.org> wrote:
>
> Add YAML devicetree binding for Bitmain BM1880 SoC.
>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> ---
> .../bindings/clock/bitmain,bm1880-clk.yaml | 83 +++++++++++++++++++
> include/dt-bindings/clock/bm1880-clock.h | 82 ++++++++++++++++++
> 2 files changed, 165 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/clock/bitmain,bm1880-clk.yaml
> create mode 100644 include/dt-bindings/clock/bm1880-clock.h
>
> diff --git a/Documentation/devicetree/bindings/clock/bitmain,bm1880-clk.yaml b/Documentation/devicetree/bindings/clock/bitmain,bm1880-clk.yaml
> new file mode 100644
> index 000000000000..a457f996287d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/bitmain,bm1880-clk.yaml
> @@ -0,0 +1,83 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/bindings/clock/bitmain,bm1880-clk.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Bitmain BM1880 Clock Controller
> +
> +maintainers:
> + - Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> +
> +description: |
> + The Bitmain BM1880 clock controller generates and supplies clock to
> + various peripherals within the SoC.
> +
> + This binding uses common clock bindings
> + [1] Documentation/devicetree/bindings/clock/clock-bindings.txt
> +
> +properties:
> + compatible:
> + oneOf:
> + - items:
> + - enum:
> + - bitmain,bm1880-clk
Just 'const: bitmain,bm1880-clk' is enough.
> +
> + reg:
> + minItems: 2
> + maxItems: 2
These 2 are implied by the items list and can be dropped.
> + items:
> + - description: pll registers
> + - description: system registers
> +
> + reg-names:
> + items:
> + - const: pll
> + - const: sys
> +
> + clocks:
> + maxItems: 1
> + description: Phandle of the input reference clock
Don't need a description if there's only one entry.
> +
> + clock-names:
> + maxItems: 1
> + items:
> + - const: osc
Just:
clock-names:
const: osc
> +
> + '#clock-cells':
> + const: 1
> +
> +required:
> + - compatible
> + - reg
> + - reg-names
> + - clocks
> + - clock-names
> + - '#clock-cells'
> +
> +examples:
> + # Clock controller node:
> + - |
> + clk: clock-controller@e8 {
> + compatible = "bitmain,bm1880-clk";
> + reg = <0xe8 0x0c>, <0x800 0xb0>;
> + reg-names = "pll", "sys";
> + clocks = <&osc>;
> + clock-names = "osc";
> + #clock-cells = <1>;
> + };
> +
> + # Example UART controller node that consumes clock generated by the clock controller:
> + - |
> + uart0: serial@...18000 {
> + compatible = "snps,dw-apb-uart";
> + reg = <0x0 0x58018000 0x0 0x2000>;
> + clocks = <&clk BM1880_CLK_UART_500M>;
> + <&clk BM1880_CLK_APB_UART>;
This won't build without includes. Please run 'make dt_binding_check'
before you submit bindings.
> + clock-names = "baudclk", "apb_pclk";
> + interrupts = <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
> + reg-shift = <2>;
> + reg-io-width = <4>;
> + };
> +
> +...
> diff --git a/include/dt-bindings/clock/bm1880-clock.h b/include/dt-bindings/clock/bm1880-clock.h
> new file mode 100644
> index 000000000000..895646d66b07
> --- /dev/null
> +++ b/include/dt-bindings/clock/bm1880-clock.h
> @@ -0,0 +1,82 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Device Tree binding constants for Bitmain BM1880 SoC
> + *
> + * Copyright (c) 2019 Linaro Ltd.
> + */
> +
> +#ifndef __DT_BINDINGS_CLOCK_BM1880_H
> +#define __DT_BINDINGS_CLOCK_BM1880_H
> +
> +#define BM1880_CLK_OSC 0
> +#define BM1880_CLK_MPLL 1
> +#define BM1880_CLK_SPLL 2
> +#define BM1880_CLK_FPLL 3
> +#define BM1880_CLK_DDRPLL 4
> +#define BM1880_CLK_A53 5
> +#define BM1880_CLK_50M_A53 6
> +#define BM1880_CLK_AHB_ROM 7
> +#define BM1880_CLK_AXI_SRAM 8
> +#define BM1880_CLK_DDR_AXI 9
> +#define BM1880_CLK_EFUSE 10
> +#define BM1880_CLK_APB_EFUSE 11
> +#define BM1880_CLK_AXI5_EMMC 12
> +#define BM1880_CLK_EMMC 13
> +#define BM1880_CLK_100K_EMMC 14
> +#define BM1880_CLK_AXI5_SD 15
> +#define BM1880_CLK_SD 16
> +#define BM1880_CLK_100K_SD 17
> +#define BM1880_CLK_500M_ETH0 18
> +#define BM1880_CLK_AXI4_ETH0 19
> +#define BM1880_CLK_500M_ETH1 20
> +#define BM1880_CLK_AXI4_ETH1 21
> +#define BM1880_CLK_AXI1_GDMA 22
> +#define BM1880_CLK_APB_GPIO 23
> +#define BM1880_CLK_APB_GPIO_INTR 24
> +#define BM1880_CLK_GPIO_DB 25
> +#define BM1880_CLK_AXI1_MINER 26
> +#define BM1880_CLK_AHB_SF 27
> +#define BM1880_CLK_SDMA_AXI 28
> +#define BM1880_CLK_SDMA_AUD 29
> +#define BM1880_CLK_APB_I2C 30
> +#define BM1880_CLK_APB_WDT 31
> +#define BM1880_CLK_APB_JPEG 32
> +#define BM1880_CLK_JPEG_AXI 33
> +#define BM1880_CLK_AXI5_NF 34
> +#define BM1880_CLK_APB_NF 35
> +#define BM1880_CLK_NF 36
> +#define BM1880_CLK_APB_PWM 37
> +#define BM1880_CLK_DIV_0_RV 38
> +#define BM1880_CLK_DIV_1_RV 39
> +#define BM1880_CLK_MUX_RV 40
> +#define BM1880_CLK_RV 41
> +#define BM1880_CLK_APB_SPI 42
> +#define BM1880_CLK_TPU_AXI 43
> +#define BM1880_CLK_DIV_UART_500M 44
> +#define BM1880_CLK_UART_500M 45
> +#define BM1880_CLK_APB_UART 46
> +#define BM1880_CLK_APB_I2S 47
> +#define BM1880_CLK_AXI4_USB 48
> +#define BM1880_CLK_APB_USB 49
> +#define BM1880_CLK_125M_USB 50
> +#define BM1880_CLK_33K_USB 51
> +#define BM1880_CLK_DIV_12M_USB 52
> +#define BM1880_CLK_12M_USB 53
> +#define BM1880_CLK_APB_VIDEO 54
> +#define BM1880_CLK_VIDEO_AXI 55
> +#define BM1880_CLK_VPP_AXI 56
> +#define BM1880_CLK_APB_VPP 57
> +#define BM1880_CLK_DIV_0_AXI1 58
> +#define BM1880_CLK_DIV_1_AXI1 59
> +#define BM1880_CLK_AXI1 60
> +#define BM1880_CLK_AXI2 61
> +#define BM1880_CLK_AXI3 62
> +#define BM1880_CLK_AXI4 63
> +#define BM1880_CLK_AXI5 64
> +#define BM1880_CLK_DIV_0_AXI6 65
> +#define BM1880_CLK_DIV_1_AXI6 66
> +#define BM1880_CLK_MUX_AXI6 67
> +#define BM1880_CLK_AXI6 68
> +#define BM1880_NR_CLKS 69
> +
> +#endif /* __DT_BINDINGS_CLOCK_BM1880_H */
> --
> 2.17.1
>
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