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Date: Mon, 22 Oct 2018 17:16:39 -0500
From: Rob Herring <robh@...nel.org>
To: "A.s. Dong" <aisheng.dong@....com>
Cc: "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"sboyd@...nel.org" <sboyd@...nel.org>,
"mturquette@...libre.com" <mturquette@...libre.com>,
"shawnguo@...nel.org" <shawnguo@...nel.org>,
Anson Huang <anson.huang@....com>,
Jacky Bai <ping.bai@....com>, dl-linux-imx <linux-imx@....com>,
Mark Rutland <mark.rutland@....com>,
Stephen Boyd <sboyd@...eaurora.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH RESEND V4 6/9] dt-bindings: clock: add imx7ulp clock
binding doc
On Sun, Oct 21, 2018 at 01:11:09PM +0000, A.s. Dong wrote:
> i.MX7ULP Clock functions are under joint control of the System
> Clock Generation (SCG) modules, Peripheral Clock Control (PCC)
> modules, and Core Mode Controller (CMC)1 blocks
>
> Note IMX7ULP has two clock domains: M4 and A7. This binding doc
> is only for A7 clock domain.
>
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: Mark Rutland <mark.rutland@....com>
> Cc: Stephen Boyd <sboyd@...eaurora.org>
> Cc: Michael Turquette <mturquette@...libre.com>
> Cc: devicetree@...r.kernel.org
> Cc: Shawn Guo <shawnguo@...nel.org>
> Cc: Anson Huang <Anson.Huang@....com>
> Cc: Bai Ping <ping.bai@....com>
> Signed-off-by: Dong Aisheng <aisheng.dong@....com>
>
> ---
> ChangeLog:
> v3->v4:
> * make scg, pcc separate nodes according to Rob's suggestion
> v2->v3:
> * no changes
> v1->v2: no changes
> ---
> .../devicetree/bindings/clock/imx7ulp-clock.txt | 87 ++++++++++++++++
> include/dt-bindings/clock/imx7ulp-clock.h | 109 +++++++++++++++++++++
> 2 files changed, 196 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/clock/imx7ulp-clock.txt
> create mode 100644 include/dt-bindings/clock/imx7ulp-clock.h
>
> diff --git a/Documentation/devicetree/bindings/clock/imx7ulp-clock.txt b/Documentation/devicetree/bindings/clock/imx7ulp-clock.txt
> new file mode 100644
> index 0000000..2239383
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/imx7ulp-clock.txt
> @@ -0,0 +1,87 @@
> +* Clock bindings for Freescale i.MX7ULP
> +
> +i.MX7ULP Clock functions are under joint control of the System
> +Clock Generation (SCG) modules, Peripheral Clock Control (PCC)
> +modules, and Core Mode Controller (CMC)1 blocks
> +
> +The clocking scheme provides clear separation between M4 domain
> +and A7 domain. Except for a few clock sources shared between two
> +domains, such as the System Oscillator clock, the Slow IRC (SIRC),
> +and and the Fast IRC clock (FIRCLK), clock sources and clock
> +management are separated and contained within each domain.
> +
> +M4 clock management consists of SCG0, PCC0, PCC1, and CMC0 modules.
> +A7 clock management consists of SCG1, PCC2, PCC3, and CMC1 modules.
Where's the CMC1 binding?
> +
> +Note: this binding doc is only for A7 clock domain.
> +
> +System Clock Generation (SCG) modules:
> +---------------------------------------------------------------------
> +The System Clock Generation (SCG) is responsible for clock generation
> +and distribution across this device. Functions performed by the SCG
> +include: clock reference selection, generation of clock used to derive
> +processor, system, peripheral bus and external memory interface clocks,
> +source selection for peripheral clocks and control of power saving
> +clock gating mode.
> +
> +Required properties:
> +
> +- compatible: Should be "fsl,imx7ulp-scg1".
> +- reg : Should contain registers location and length.
> +- #clock-cells: Should be <1>.
> +- clocks: Should contain the fixed input clocks.
> +- clock-name: Should contain the following clock names:"rosc", "sosc",
clock-names
> + "sirc", "firc", "upll", "mpll".
> +
> +Peripheral Clock Control (PCC) modules:
> +---------------------------------------------------------------------
> +The Peripheral Clock Control (PCC) is responsible for clock selection,
> +optional division and clock gating mode for peripherals in their
> +respected power domain
> +
> +Required properties:
> +- compatible: Should be "fsl,imx7ulp-pcc2" or "fsl,imx7ulp-pcc3".
Please format one per line.
There's some register layout difference between PCC2 and PCC3?
> +- reg : Should contain registers location and length.
> +- #clock-cells: Should be <1>.
No input clocks to list?
> +
> +The clock consumer should specify the desired clock by having the clock
> +ID in its "clocks" phandle cell.
> +See include/dt-bindings/clock/imx7ulp-clock.h
> +for the full list of i.MX7ULP clock IDs of each module.
> +
> +Examples:
> +
> +#include <dt-bindings/clock/imx7ulp-clock.h>
> +
> +scg1: scg1@...e0000 {
> + compatible = "fsl,imx7ulp-scg1;
> + reg = <0x403e0000 0x10000>;
> + clocks = <&rosc>, <&sosc>, <&sirc>,
> + <&firc>, <&upll>, <&mpll>;
> + clock-names = "rosc", "sosc", "sirc",
> + "firc", "upll", "mpll";
> + #clock-cells = <1>;
> +};
> +
> +pcc2: pcc2@...f0000 {
> + compatible = "fsl,imx7ulp-pcc2";
> + reg = <0x403f0000 0x10000>;
> + #clock-cells = <1>;
> +};
> +
> +pcc3: pcc3@...30000 {
> + compatible = "fsl,imx7ulp-pcc3";
> + reg = <0x40b30000 0x10000>;
> + #clock-cells = <1>;
> +};
> +
> +usdhc1: usdhc@...80000 {
> + compatible = "fsl,imx7ulp-usdhc";
> + reg = <0x40380000 0x10000>;
> + interrupts = <GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&scg1 IMX7ULP_CLK_NIC1_BUS_DIV>,
> + <&scg1 IMX7ULP_CLK_NIC1_DIV>,
> + <&pcc2 IMX7ULP_CLK_USDHC1>;
> + clock-names ="ipg", "ahb", "per";
> + bus-width = <4>;
> +};
> diff --git a/include/dt-bindings/clock/imx7ulp-clock.h b/include/dt-bindings/clock/imx7ulp-clock.h
> new file mode 100644
> index 0000000..008c5ee
> --- /dev/null
> +++ b/include/dt-bindings/clock/imx7ulp-clock.h
> @@ -0,0 +1,109 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */
> +/*
> + * Copyright (C) 2016 Freescale Semiconductor, Inc.
> + * Copyright 2017~2018 NXP
> + *
> + */
> +
> +#ifndef __DT_BINDINGS_CLOCK_IMX7ULP_H
> +#define __DT_BINDINGS_CLOCK_IMX7ULP_H
> +
> +/* SCG1 */
> +
> +#define IMX7ULP_CLK_DUMMY 0
> +#define IMX7ULP_CLK_ROSC 1
> +#define IMX7ULP_CLK_SOSC 2
> +#define IMX7ULP_CLK_FIRC 3
> +#define IMX7ULP_CLK_SPLL_PRE_SEL 4
> +#define IMX7ULP_CLK_SPLL_PRE_DIV 5
> +#define IMX7ULP_CLK_SPLL 6
> +#define IMX7ULP_CLK_SPLL_POST_DIV1 7
> +#define IMX7ULP_CLK_SPLL_POST_DIV2 8
> +#define IMX7ULP_CLK_SPLL_PFD0 9
> +#define IMX7ULP_CLK_SPLL_PFD1 10
> +#define IMX7ULP_CLK_SPLL_PFD2 11
> +#define IMX7ULP_CLK_SPLL_PFD3 12
> +#define IMX7ULP_CLK_SPLL_PFD_SEL 13
> +#define IMX7ULP_CLK_SPLL_SEL 14
> +#define IMX7ULP_CLK_APLL_PRE_SEL 15
> +#define IMX7ULP_CLK_APLL_PRE_DIV 16
> +#define IMX7ULP_CLK_APLL 17
> +#define IMX7ULP_CLK_APLL_POST_DIV1 18
> +#define IMX7ULP_CLK_APLL_POST_DIV2 19
> +#define IMX7ULP_CLK_APLL_PFD0 20
> +#define IMX7ULP_CLK_APLL_PFD1 21
> +#define IMX7ULP_CLK_APLL_PFD2 22
> +#define IMX7ULP_CLK_APLL_PFD3 23
> +#define IMX7ULP_CLK_APLL_PFD_SEL 24
> +#define IMX7ULP_CLK_APLL_SEL 25
> +#define IMX7ULP_CLK_UPLL 26
> +#define IMX7ULP_CLK_SYS_SEL 27
> +#define IMX7ULP_CLK_CORE_DIV 28
> +#define IMX7ULP_CLK_BUS_DIV 29
> +#define IMX7ULP_CLK_PLAT_DIV 30
> +#define IMX7ULP_CLK_DDR_SEL 31
> +#define IMX7ULP_CLK_DDR_DIV 32
> +#define IMX7ULP_CLK_NIC_SEL 33
> +#define IMX7ULP_CLK_NIC0_DIV 34
> +#define IMX7ULP_CLK_GPU_DIV 35
> +#define IMX7ULP_CLK_NIC1_DIV 36
> +#define IMX7ULP_CLK_NIC1_BUS_DIV 37
> +#define IMX7ULP_CLK_NIC1_EXT_DIV 38
> +#define IMX7ULP_CLK_MIPI_PLL 39
> +#define IMX7ULP_CLK_SIRC 40
> +#define IMX7ULP_CLK_SOSC_BUS_CLK 41
> +#define IMX7ULP_CLK_FIRC_BUS_CLK 42
> +#define IMX7ULP_CLK_SPLL_BUS_CLK 43
> +
> +#define IMX7ULP_CLK_SCG1_END 44
> +
> +/* PCC2 */
> +#define IMX7ULP_CLK_DMA1 0
> +#define IMX7ULP_CLK_RGPIO2P1 1
> +#define IMX7ULP_CLK_FLEXBUS 2
> +#define IMX7ULP_CLK_SEMA42_1 3
> +#define IMX7ULP_CLK_DMA_MUX1 4
> +#define IMX7ULP_CLK_SNVS 5
> +#define IMX7ULP_CLK_CAAM 6
> +#define IMX7ULP_CLK_LPTPM4 7
> +#define IMX7ULP_CLK_LPTPM5 8
> +#define IMX7ULP_CLK_LPIT1 9
> +#define IMX7ULP_CLK_LPSPI2 10
> +#define IMX7ULP_CLK_LPSPI3 11
> +#define IMX7ULP_CLK_LPI2C4 12
> +#define IMX7ULP_CLK_LPI2C5 13
> +#define IMX7ULP_CLK_LPUART4 14
> +#define IMX7ULP_CLK_LPUART5 15
> +#define IMX7ULP_CLK_FLEXIO1 16
> +#define IMX7ULP_CLK_USB0 17
> +#define IMX7ULP_CLK_USB1 18
> +#define IMX7ULP_CLK_USB_PHY 19
> +#define IMX7ULP_CLK_USB_PL301 20
> +#define IMX7ULP_CLK_USDHC0 21
> +#define IMX7ULP_CLK_USDHC1 22
> +#define IMX7ULP_CLK_WDG1 23
> +#define IMX7ULP_CLK_WDG2 24
> +
> +#define IMX7ULP_CLK_PCC2_END 25
> +
> +/* PCC3 */
> +#define IMX7ULP_CLK_LPTPM6 0
> +#define IMX7ULP_CLK_LPTPM7 1
> +#define IMX7ULP_CLK_LPI2C6 2
> +#define IMX7ULP_CLK_LPI2C7 3
> +#define IMX7ULP_CLK_LPUART6 4
> +#define IMX7ULP_CLK_LPUART7 5
> +#define IMX7ULP_CLK_VIU 6
> +#define IMX7ULP_CLK_DSI 7
> +#define IMX7ULP_CLK_LCDIF 8
> +#define IMX7ULP_CLK_MMDC 9
> +#define IMX7ULP_CLK_PCTLC 10
> +#define IMX7ULP_CLK_PCTLD 11
> +#define IMX7ULP_CLK_PCTLE 12
> +#define IMX7ULP_CLK_PCTLF 13
> +#define IMX7ULP_CLK_GPU3D 14
> +#define IMX7ULP_CLK_GPU2D 15
> +
> +#define IMX7ULP_CLK_PCC3_END 16
> +
> +#endif /* __DT_BINDINGS_CLOCK_IMX7ULP_H */
> --
> 2.7.4
>
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