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From: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
To: Igor Belwon <igor.belwon@mentallysanemainliners.org>,
	Krzysztof Kozlowski <krzk@kernel.org>,
	Sylwester Nawrocki <s.nawrocki@samsung.com>,
	Chanwoo Choi <cw00.choi@samsung.com>,
	Alim Akhtar <alim.akhtar@samsung.com>,
	Michael Turquette <mturquette@baylibre.com>,
	Stephen Boyd <sboyd@kernel.org>, Rob Herring <robh@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>
Cc: linux-samsung-soc@vger.kernel.org, linux-clk@vger.kernel.org,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/3] dt-bindings: clock: Add Exynos990 SoC CMU bindings
Date: Fri, 6 Dec 2024 18:44:38 +0200	[thread overview]
Message-ID: <ce85151d-cb62-43cc-ab6f-08769b98f6a5@gmail.com> (raw)
In-Reply-To: <20241206-exynos990-cmu-v2-1-4666ff0a099b@mentallysanemainliners.org>

On 12/6/24 18:12, Igor Belwon wrote:
> Add dt-schema documentation for the Exynos990 SoC CMU.
>
> This clock management unit has a topmost block (CMU_TOP)
> that generates top clocks for other blocks. Currently the
> only other block implemented is CMU_HSI0, which provides
> clocks for the USB part of the SoC.
>
> Also, device-tree binding definitions added for these blocks:
> - CMU_TOP
> - CMU_HSI0
>
> Signed-off-by: Igor Belwon <igor.belwon@mentallysanemainliners.org>
> ---
>  .../bindings/clock/samsung,exynos990-clock.yaml    | 120 +++++++++++
>  include/dt-bindings/clock/samsung,exynos990.h      | 236 +++++++++++++++++++++
>  2 files changed, 356 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/clock/samsung,exynos990-clock.yaml b/Documentation/devicetree/bindings/clock/samsung,exynos990-clock.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..36d70d6d1b30fa629d5d60677851fb915934efa3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/samsung,exynos990-clock.yaml
> @@ -0,0 +1,120 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/clock/samsung,exynos990-clock.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Samsung Exynos990 SoC clock controller
> +
> +maintainers:
> +  - Igor Belwon <igor.belwon@mentallysanemainliners.org>
> +  - Chanwoo Choi <cw00.choi@samsung.com>
> +  - Krzysztof Kozlowski <krzk@kernel.org>
> +
> +description: |
> +  Exynos990 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.
> +
> +  CMU_TOP is a top-level CMU, where all base clocks are prepared using PLLs and
> +  dividers; all other clocks of function blocks (other CMUs) are usually
> +  derived from CMU_TOP.
> +
> +  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,exynos990.h' header.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - samsung,exynos990-cmu-hsi0
> +      - samsung,exynos990-cmu-top
> +
> +  clocks:
> +    minItems: 1
> +    maxItems: 5
> +
> +  clock-names:
> +    minItems: 1
> +    maxItems: 5
> +
> +  "#clock-cells":
> +    const: 1
> +
> +  reg:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - clocks
> +  - clock-names
> +  - reg
> +  - "#clock-cells"

Keep the order of items in 'required:' the same as with 'properties:'.

> +
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: samsung,exynos990-cmu-hsi0
> +
> +    then:
> +      properties:
> +        clocks:
> +          items:
> +            - description: External reference clock (26 MHz)
> +            - description: CMU_HSI0 BUS clock (from CMU_TOP)
> +            - description: CMU_HSI0 USB31DRD clock (from CMU_TOP)
> +            - description: CMU_HSI0 USBDP_DEBUG clock (from CMU_TOP)
> +            - description: CMU_HSI0 DPGTC clock (from CMU_TOP)
> +
> +        clock-names:
> +          items:
> +            - const: oscclk
> +            - const: dout_cmu_hsi0_bus

Since there is only one bus clock that has to be provided, use a shorter
name, like "bus". It's also like that on other platform clock drivers.

> +            - const: dout_cmu_hsi0_usb31drd

usb31drd

> +            - const: dout_cmu_hsi0_usbdp_debug

usbdp

> +            - const: dout_cmu_hsi0_dpgtc

dpgtc

> +
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: samsung,exynos990-cmu-top
> +
> +    then:
> +      properties:
> +        clocks:
> +          items:
> +            - description: External reference clock (26 MHz)
> +
> +        clock-names:
> +          items:
> +            - const: oscclk
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/samsung,exynos990.h>
> +
> +    cmu_hsi0: clock-controller@10a00000 {
> +        compatible = "samsung,exynos990-cmu-hsi0";
> +        reg = <0x10a00000 0x8000>;
> +        #clock-cells = <1>;
> +
> +        clocks = <&oscclk>,
> +                 <&cmu_top CLK_DOUT_CMU_HSI0_BUS>,
> +                 <&cmu_top CLK_DOUT_CMU_HSI0_USB31DRD>,
> +                 <&cmu_top CLK_DOUT_CMU_HSI0_USBDP_DEBUG>,
> +                 <&cmu_top CLK_DOUT_CMU_HSI0_DPGTC>;
> +        clock-names = "oscclk", "dout_cmu_hsi0_bus",
> +                                "dout_cmu_hsi0_usb31drd",
> +                                "dout_cmu_hsi0_usbdp_debug",
> +                                "dout_cmu_hsi0_dpgtc";

Correct here as well.
Best regards, Ivo.

> +    };
> +
> +...
> diff --git a/include/dt-bindings/clock/samsung,exynos990.h b/include/dt-bindings/clock/samsung,exynos990.h
> new file mode 100644
> index 0000000000000000000000000000000000000000..307215a3f3eddd579e6733b51a777fb45398bb92
> --- /dev/null
> +++ b/include/dt-bindings/clock/samsung,exynos990.h
> @@ -0,0 +1,236 @@
> +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
> +/*
> + * Copyright (C) 2024 Igor Belwon <igor.belwon@mentallysanemainliners.org>
> + *
> + * Device Tree binding constants for Exynos990 clock controller.
> + */
> +
> +#ifndef _DT_BINDINGS_CLOCK_EXYNOS_990_H
> +#define _DT_BINDINGS_CLOCK_EXYNOS_990_H
> +
> +/* CMU_TOP */
> +#define CLK_FOUT_SHARED0_PLL		1
> +#define CLK_FOUT_SHARED1_PLL		2
> +#define CLK_FOUT_SHARED2_PLL		3
> +#define CLK_FOUT_SHARED3_PLL		4
> +#define CLK_FOUT_SHARED4_PLL		5
> +#define CLK_FOUT_G3D_PLL		6
> +#define CLK_FOUT_MMC_PLL		7
> +#define CLK_MOUT_PLL_SHARED0		8
> +#define CLK_MOUT_PLL_SHARED1		9
> +#define CLK_MOUT_PLL_SHARED2		10
> +#define CLK_MOUT_PLL_SHARED3		11
> +#define CLK_MOUT_PLL_SHARED4		12
> +#define CLK_MOUT_PLL_MMC		13
> +#define CLK_MOUT_PLL_G3D		14
> +#define CLK_MOUT_CMU_APM_BUS		15
> +#define CLK_MOUT_CMU_AUD_CPU		16
> +#define CLK_MOUT_CMU_BUS0_BUS		17
> +#define CLK_MOUT_CMU_BUS1_BUS		18
> +#define CLK_MOUT_CMU_BUS1_SSS		19
> +#define CLK_MOUT_CMU_CIS_CLK0		20
> +#define CLK_MOUT_CMU_CIS_CLK1		21
> +#define CLK_MOUT_CMU_CIS_CLK2		22
> +#define CLK_MOUT_CMU_CIS_CLK3		23
> +#define CLK_MOUT_CMU_CIS_CLK4		24
> +#define CLK_MOUT_CMU_CIS_CLK5		25
> +#define CLK_MOUT_CMU_CMU_BOOST		26
> +#define CLK_MOUT_CMU_CORE_BUS		27
> +#define CLK_MOUT_CMU_CPUCL0_DBG_BUS	28
> +#define CLK_MOUT_CMU_CPUCL0_SWITCH	29
> +#define CLK_MOUT_CMU_CPUCL1_SWITCH	30
> +#define CLK_MOUT_CMU_CPUCL2_BUSP	31
> +#define CLK_MOUT_CMU_CPUCL2_SWITCH	32
> +#define CLK_MOUT_CMU_CSIS_BUS		33
> +#define CLK_MOUT_CMU_CSIS_OIS_MCU	34
> +#define CLK_MOUT_CMU_DNC_BUS		35
> +#define CLK_MOUT_CMU_DNC_BUSM		36
> +#define CLK_MOUT_CMU_DNS_BUS		37
> +#define CLK_MOUT_CMU_DPU		38
> +#define CLK_MOUT_CMU_DPU_ALT		39
> +#define CLK_MOUT_CMU_DSP_BUS		40
> +#define CLK_MOUT_CMU_G2D_G2D		41
> +#define CLK_MOUT_CMU_G2D_MSCL		42
> +#define CLK_MOUT_CMU_HPM		43
> +#define CLK_MOUT_CMU_HSI0_BUS		44
> +#define CLK_MOUT_CMU_HSI0_DPGTC		45
> +#define CLK_MOUT_CMU_HSI0_USB31DRD	46
> +#define CLK_MOUT_CMU_HSI0_USBDP_DEBUG	47
> +#define CLK_MOUT_CMU_HSI1_BUS		48
> +#define CLK_MOUT_CMU_HSI1_MMC_CARD	49
> +#define CLK_MOUT_CMU_HSI1_PCIE		50
> +#define CLK_MOUT_CMU_HSI1_UFS_CARD	51
> +#define CLK_MOUT_CMU_HSI1_UFS_EMBD	52
> +#define CLK_MOUT_CMU_HSI2_BUS		53
> +#define CLK_MOUT_CMU_HSI2_PCIE		54
> +#define CLK_MOUT_CMU_IPP_BUS		55
> +#define CLK_MOUT_CMU_ITP_BUS		56
> +#define CLK_MOUT_CMU_MCSC_BUS		57
> +#define CLK_MOUT_CMU_MCSC_GDC		58
> +#define CLK_MOUT_CMU_CMU_BOOST_CPU	59
> +#define CLK_MOUT_CMU_MFC0_MFC0		60
> +#define CLK_MOUT_CMU_MFC0_WFD		61
> +#define CLK_MOUT_CMU_MIF_BUSP		62
> +#define CLK_MOUT_CMU_MIF_SWITCH		63
> +#define CLK_MOUT_CMU_NPU_BUS		64
> +#define CLK_MOUT_CMU_PERIC0_BUS		65
> +#define CLK_MOUT_CMU_PERIC0_IP		66
> +#define CLK_MOUT_CMU_PERIC1_BUS		67
> +#define CLK_MOUT_CMU_PERIC1_IP		68
> +#define CLK_MOUT_CMU_PERIS_BUS		69
> +#define CLK_MOUT_CMU_SSP_BUS		70
> +#define CLK_MOUT_CMU_TNR_BUS		71
> +#define CLK_MOUT_CMU_VRA_BUS		72
> +#define CLK_DOUT_CMU_APM_BUS		73
> +#define CLK_DOUT_CMU_AUD_CPU		74
> +#define CLK_DOUT_CMU_BUS0_BUS		75
> +#define CLK_DOUT_CMU_BUS1_BUS		76
> +#define CLK_DOUT_CMU_BUS1_SSS		77
> +#define CLK_DOUT_CMU_CIS_CLK0		78
> +#define CLK_DOUT_CMU_CIS_CLK1		79
> +#define CLK_DOUT_CMU_CIS_CLK2		80
> +#define CLK_DOUT_CMU_CIS_CLK3		81
> +#define CLK_DOUT_CMU_CIS_CLK4		82
> +#define CLK_DOUT_CMU_CIS_CLK5		83
> +#define CLK_DOUT_CMU_CMU_BOOST		84
> +#define CLK_DOUT_CMU_CORE_BUS		85
> +#define CLK_DOUT_CMU_CPUCL0_DBG_BUS	86
> +#define CLK_DOUT_CMU_CPUCL0_SWITCH	87
> +#define CLK_DOUT_CMU_CPUCL1_SWITCH	88
> +#define CLK_DOUT_CMU_CPUCL2_BUSP	89
> +#define CLK_DOUT_CMU_CPUCL2_SWITCH	90
> +#define CLK_DOUT_CMU_CSIS_BUS		91
> +#define CLK_DOUT_CMU_CSIS_OIS_MCU	92
> +#define CLK_DOUT_CMU_DNC_BUS		93
> +#define CLK_DOUT_CMU_DNC_BUSM		94
> +#define CLK_DOUT_CMU_DNS_BUS		95
> +#define CLK_DOUT_CMU_DSP_BUS		96
> +#define CLK_DOUT_CMU_G2D_G2D		97
> +#define CLK_DOUT_CMU_G2D_MSCL		98
> +#define CLK_DOUT_CMU_G3D_SWITCH		99
> +#define CLK_DOUT_CMU_HPM		100
> +#define CLK_DOUT_CMU_HSI0_BUS		101
> +#define CLK_DOUT_CMU_HSI0_DPGTC		102
> +#define CLK_DOUT_CMU_HSI0_USB31DRD	103
> +#define CLK_DOUT_CMU_HSI0_USBDP_DEBUG	104
> +#define CLK_DOUT_CMU_HSI1_BUS		105
> +#define CLK_DOUT_CMU_HSI1_MMC_CARD	106
> +#define CLK_DOUT_CMU_HSI1_PCIE		107
> +#define CLK_DOUT_CMU_HSI1_UFS_CARD	108
> +#define CLK_DOUT_CMU_HSI1_UFS_EMBD	109
> +#define CLK_DOUT_CMU_HSI2_BUS		110
> +#define CLK_DOUT_CMU_HSI2_PCIE		111
> +#define CLK_DOUT_CMU_IPP_BUS		112
> +#define CLK_DOUT_CMU_ITP_BUS		113
> +#define CLK_DOUT_CMU_MCSC_BUS		114
> +#define CLK_DOUT_CMU_MCSC_GDC		115
> +#define CLK_DOUT_CMU_CMU_BOOST_CPU	116
> +#define CLK_DOUT_CMU_MFC0_MFC0		117
> +#define CLK_DOUT_CMU_MFC0_WFD		118
> +#define CLK_DOUT_CMU_MIF_BUSP		119
> +#define CLK_DOUT_CMU_NPU_BUS		120
> +#define CLK_DOUT_CMU_OTP		121
> +#define CLK_DOUT_CMU_PERIC0_BUS		122
> +#define CLK_DOUT_CMU_PERIC0_IP		123
> +#define CLK_DOUT_CMU_PERIC1_BUS		124
> +#define CLK_DOUT_CMU_PERIC1_IP		125
> +#define CLK_DOUT_CMU_PERIS_BUS		126
> +#define CLK_DOUT_CMU_SSP_BUS		127
> +#define CLK_DOUT_CMU_TNR_BUS		128
> +#define CLK_DOUT_CMU_VRA_BUS		129
> +#define CLK_DOUT_CMU_DPU		130
> +#define CLK_DOUT_CMU_DPU_ALT		131
> +#define CLK_DOUT_CMU_SHARED0_DIV2	132
> +#define CLK_DOUT_CMU_SHARED0_DIV3	133
> +#define CLK_DOUT_CMU_SHARED0_DIV4	134
> +#define CLK_DOUT_CMU_SHARED1_DIV2	135
> +#define CLK_DOUT_CMU_SHARED1_DIV3	136
> +#define CLK_DOUT_CMU_SHARED1_DIV4	137
> +#define CLK_DOUT_CMU_SHARED2_DIV2	138
> +#define CLK_DOUT_CMU_SHARED4_DIV2	139
> +#define CLK_DOUT_CMU_SHARED4_DIV3	140
> +#define CLK_DOUT_CMU_SHARED4_DIV4	141
> +#define CLK_GOUT_CMU_G3D_BUS		142
> +#define CLK_GOUT_CMU_MIF_SWITCH		143
> +#define CLK_GOUT_CMU_APM_BUS		144
> +#define CLK_GOUT_CMU_AUD_CPU		145
> +#define CLK_GOUT_CMU_BUS0_BUS		146
> +#define CLK_GOUT_CMU_BUS1_BUS		147
> +#define CLK_GOUT_CMU_BUS1_SSS		148
> +#define CLK_GOUT_CMU_CIS_CLK0		149
> +#define CLK_GOUT_CMU_CIS_CLK1		150
> +#define CLK_GOUT_CMU_CIS_CLK2		151
> +#define CLK_GOUT_CMU_CIS_CLK3		152
> +#define CLK_GOUT_CMU_CIS_CLK4		153
> +#define CLK_GOUT_CMU_CIS_CLK5		154
> +#define CLK_GOUT_CMU_CORE_BUS		155
> +#define CLK_GOUT_CMU_CPUCL0_DBG_BUS	156
> +#define CLK_GOUT_CMU_CPUCL0_SWITCH	157
> +#define CLK_GOUT_CMU_CPUCL1_SWITCH	158
> +#define CLK_GOUT_CMU_CPUCL2_BUSP	159
> +#define CLK_GOUT_CMU_CPUCL2_SWITCH	160
> +#define CLK_GOUT_CMU_CSIS_BUS		161
> +#define CLK_GOUT_CMU_CSIS_OIS_MCU	162
> +#define CLK_GOUT_CMU_DNC_BUS		163
> +#define CLK_GOUT_CMU_DNC_BUSM		164
> +#define CLK_GOUT_CMU_DNS_BUS		165
> +#define CLK_GOUT_CMU_DPU		166
> +#define CLK_GOUT_CMU_DPU_BUS		167
> +#define CLK_GOUT_CMU_DSP_BUS		168
> +#define CLK_GOUT_CMU_G2D_G2D		169
> +#define CLK_GOUT_CMU_G2D_MSCL		170
> +#define CLK_GOUT_CMU_G3D_SWITCH		171
> +#define CLK_GOUT_CMU_HPM		172
> +#define CLK_GOUT_CMU_HSI0_BUS		173
> +#define CLK_GOUT_CMU_HSI0_DPGTC		174
> +#define CLK_GOUT_CMU_HSI0_USB31DRD	175
> +#define CLK_GOUT_CMU_HSI0_USBDP_DEBUG	176
> +#define CLK_GOUT_CMU_HSI1_BUS		177
> +#define CLK_GOUT_CMU_HSI1_MMC_CARD	178
> +#define CLK_GOUT_CMU_HSI1_PCIE		179
> +#define CLK_GOUT_CMU_HSI1_UFS_CARD	180
> +#define CLK_GOUT_CMU_HSI1_UFS_EMBD	181
> +#define CLK_GOUT_CMU_HSI2_BUS		182
> +#define CLK_GOUT_CMU_HSI2_PCIE		183
> +#define CLK_GOUT_CMU_IPP_BUS		184
> +#define CLK_GOUT_CMU_ITP_BUS		185
> +#define CLK_GOUT_CMU_MCSC_BUS		186
> +#define CLK_GOUT_CMU_MCSC_GDC		187
> +#define CLK_GOUT_CMU_MFC0_MFC0		188
> +#define CLK_GOUT_CMU_MFC0_WFD		189
> +#define CLK_GOUT_CMU_MIF_BUSP		190
> +#define CLK_GOUT_CMU_NPU_BUS		191
> +#define CLK_GOUT_CMU_PERIC0_BUS		192
> +#define CLK_GOUT_CMU_PERIC0_IP		193
> +#define CLK_GOUT_CMU_PERIC1_BUS		194
> +#define CLK_GOUT_CMU_PERIC1_IP		195
> +#define CLK_GOUT_CMU_PERIS_BUS		196
> +#define CLK_GOUT_CMU_SSP_BUS		197
> +#define CLK_GOUT_CMU_TNR_BUS		198
> +#define CLK_GOUT_CMU_VRA_BUS		199
> +
> +/* CMU_HSI0 */
> +#define CLK_MOUT_HSI0_BUS_USER				1
> +#define CLK_MOUT_HSI0_USB31DRD_USER			2
> +#define CLK_MOUT_HSI0_USBDP_DEBUG_USER			3
> +#define CLK_MOUT_HSI0_DPGTC_USER			4
> +#define CLK_GOUT_HSI0_DP_LINK_DP_GTC_CLK		5
> +#define CLK_GOUT_HSI0_DP_LINK_PCLK			6
> +#define CLK_GOUT_HSI0_D_TZPC_HSI0_PCLK			7
> +#define CLK_GOUT_HSI0_LHM_AXI_P_HSI0_CLK		8
> +#define CLK_GOUT_HSI0_PPMU_HSI0_BUS1_ACLK		9
> +#define CLK_GOUT_HSI0_PPMU_HSI0_BUS1_PCLK		10
> +#define CLK_GOUT_HSI0_CLK_HSI0_BUS_CLK			11
> +#define CLK_GOUT_HSI0_SYSMMU_USB_CLK_S2			12
> +#define CLK_GOUT_HSI0_SYSREG_HSI0_PCLK			13
> +#define CLK_GOUT_HSI0_USB31DRD_ACLK_PHYCTRL		14
> +#define CLK_GOUT_HSI0_USB31DRD_BUS_CLK_EARLY		15
> +#define CLK_GOUT_HSI0_USB31DRD_USB31DRD_REF_CLK_40	16
> +#define CLK_GOUT_HSI0_USB31DRD_USBDPPHY_REF_SOC_PLL	17
> +#define CLK_GOUT_HSI0_USB31DRD_USBDPPHY_SCL_APB		18
> +#define CLK_GOUT_HSI0_USB31DRD_USBPCS_APB_CLK		19
> +#define CLK_GOUT_HSI0_VGEN_LITE_HSI0_CLK		20
> +#define CLK_GOUT_HSI0_CMU_HSI0_PCLK			21
> +#define CLK_GOUT_HSI0_XIU_D_HSI0_ACLK			22
> +
> +#endif
>


  reply	other threads:[~2024-12-06 16:44 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-12-06 16:12 [PATCH v2 0/3] clk: samsung: Introduce Exynos990 clock support Igor Belwon
2024-12-06 16:12 ` [PATCH v2 1/3] dt-bindings: clock: Add Exynos990 SoC CMU bindings Igor Belwon
2024-12-06 16:44   ` Ivaylo Ivanov [this message]
2024-12-06 16:12 ` [PATCH v2 2/3] clk: samsung: clk-pll: Add support for pll_{0717x, 0718x, 0732x} Igor Belwon
2024-12-06 16:12 ` [PATCH v2 3/3] clk: samsung: Introduce Exynos990 clock controller driver Igor Belwon

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