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Date: Fri, 27 Oct 2023 15:47:48 +0100
From: Conor Dooley <conor@...nel.org>
To: Stanislav Jakubek <stano.jakubek@...il.com>
Cc: Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
Florian Fainelli <florian.fainelli@...adcom.com>,
Ray Jui <rjui@...adcom.com>,
Scott Branden <sbranden@...adcom.com>,
bcm-kernel-feedback-list@...adcom.com, linux-clk@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Artur Weber <aweber.kernel@...il.com>
Subject: Re: [PATCH v2] dt-bindings: clock: brcm,kona-ccu: convert to YAML
On Tue, Oct 24, 2023 at 06:45:21PM +0200, Stanislav Jakubek wrote:
> Convert Broadcom Kona family clock controller unit (CCU) bindings
> to DT schema.
I didn't cross-check the clock-output-names, but this conversion mostly
looks good to me.
> Changes during conversion:
> - remove "dmac" from clock-output-names for brcm,bcm11351-master-ccu,
> it is not used in DT nor the dt-bindings
> - remove "uartb4" from clock-output-names for brcm,bcm21664-slave-ccu,
> it is not used in DT nor the dt-bindings
This I'm not sure about - they _were_ documented in the text-form
dt-binding, even if they weren't used in the dts. If the clock
controller does actually produce these clocks, removing them doesn't
make sense to me.
Cheers,
Conor.
>
> Signed-off-by: Stanislav Jakubek <stano.jakubek@...il.com>
> ---
>
> Changes in V2:
> - remove the table copied from the old txt bindings, replace it with if-then
> blocks individually listing the allowed clock-output-names per compatible
> - remove "dmac" from clock-output-names for brcm,bcm11351-master-ccu,
> it is not used in DT nor the dt-bindings
> - remove "uartb4" from clock-output-names for brcm,bcm21664-slave-ccu,
> it is not used in DT nor the dt-bindings
> - move allOf: after required:
> - Link to V1: https://lore.kernel.org/lkml/ZTUIJrTc6KKyT4xj@standask-GA-A55M-S2HP/
>
> .../bindings/clock/brcm,kona-ccu.txt | 138 -------------
> .../bindings/clock/brcm,kona-ccu.yaml | 181 ++++++++++++++++++
> 2 files changed, 181 insertions(+), 138 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/clock/brcm,kona-ccu.txt
> create mode 100644 Documentation/devicetree/bindings/clock/brcm,kona-ccu.yaml
>
> diff --git a/Documentation/devicetree/bindings/clock/brcm,kona-ccu.txt b/Documentation/devicetree/bindings/clock/brcm,kona-ccu.txt
> deleted file mode 100644
> index 8e5a7d868557..000000000000
> --- a/Documentation/devicetree/bindings/clock/brcm,kona-ccu.txt
> +++ /dev/null
> @@ -1,138 +0,0 @@
> -Broadcom Kona Family Clocks
> -
> -This binding is associated with Broadcom SoCs having "Kona" style
> -clock control units (CCUs). A CCU is a clock provider that manages
> -a set of clock signals. Each CCU is represented by a node in the
> -device tree.
> -
> -This binding uses the common clock binding:
> - Documentation/devicetree/bindings/clock/clock-bindings.txt
> -
> -Required properties:
> -- compatible
> - Shall have a value of the form "brcm,<model>-<which>-ccu",
> - where <model> is a Broadcom SoC model number and <which> is
> - the name of a defined CCU. For example:
> - "brcm,bcm11351-root-ccu"
> - The compatible strings used for each supported SoC family
> - are defined below.
> -- reg
> - Shall define the base and range of the address space
> - containing clock control registers
> -- #clock-cells
> - Shall have value <1>. The permitted clock-specifier values
> - are defined below.
> -- clock-output-names
> - Shall be an ordered list of strings defining the names of
> - the clocks provided by the CCU.
> -
> -Device tree example:
> -
> - slave_ccu: slave_ccu {
> - compatible = "brcm,bcm11351-slave-ccu";
> - reg = <0x3e011000 0x0f00>;
> - #clock-cells = <1>;
> - clock-output-names = "uartb",
> - "uartb2",
> - "uartb3",
> - "uartb4";
> - };
> -
> - ref_crystal_clk: ref_crystal {
> - #clock-cells = <0>;
> - compatible = "fixed-clock";
> - clock-frequency = <26000000>;
> - };
> -
> - uart@...02000 {
> - compatible = "brcm,bcm11351-dw-apb-uart", "snps,dw-apb-uart";
> - reg = <0x3e002000 0x1000>;
> - clocks = <&slave_ccu BCM281XX_SLAVE_CCU_UARTB3>;
> - interrupts = <GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH>;
> - reg-shift = <2>;
> - reg-io-width = <4>;
> - };
> -
> -BCM281XX family
> ----------------
> -CCU compatible string values for SoCs in the BCM281XX family are:
> - "brcm,bcm11351-root-ccu"
> - "brcm,bcm11351-aon-ccu"
> - "brcm,bcm11351-hub-ccu"
> - "brcm,bcm11351-master-ccu"
> - "brcm,bcm11351-slave-ccu"
> -
> -The following table defines the set of CCUs and clock specifiers for
> -BCM281XX family clocks. When a clock consumer references a clocks,
> -its symbolic specifier (rather than its numeric index value) should
> -be used. These specifiers are defined in:
> - "include/dt-bindings/clock/bcm281xx.h"
> -
> - CCU Clock Type Index Specifier
> - --- ----- ---- ----- ---------
> - root frac_1m peri 0 BCM281XX_ROOT_CCU_FRAC_1M
> -
> - aon hub_timer peri 0 BCM281XX_AON_CCU_HUB_TIMER
> - aon pmu_bsc peri 1 BCM281XX_AON_CCU_PMU_BSC
> - aon pmu_bsc_var peri 2 BCM281XX_AON_CCU_PMU_BSC_VAR
> -
> - hub tmon_1m peri 0 BCM281XX_HUB_CCU_TMON_1M
> -
> - master sdio1 peri 0 BCM281XX_MASTER_CCU_SDIO1
> - master sdio2 peri 1 BCM281XX_MASTER_CCU_SDIO2
> - master sdio3 peri 2 BCM281XX_MASTER_CCU_SDIO3
> - master sdio4 peri 3 BCM281XX_MASTER_CCU_SDIO4
> - master dmac peri 4 BCM281XX_MASTER_CCU_DMAC
> - master usb_ic peri 5 BCM281XX_MASTER_CCU_USB_IC
> - master hsic2_48m peri 6 BCM281XX_MASTER_CCU_HSIC_48M
> - master hsic2_12m peri 7 BCM281XX_MASTER_CCU_HSIC_12M
> -
> - slave uartb peri 0 BCM281XX_SLAVE_CCU_UARTB
> - slave uartb2 peri 1 BCM281XX_SLAVE_CCU_UARTB2
> - slave uartb3 peri 2 BCM281XX_SLAVE_CCU_UARTB3
> - slave uartb4 peri 3 BCM281XX_SLAVE_CCU_UARTB4
> - slave ssp0 peri 4 BCM281XX_SLAVE_CCU_SSP0
> - slave ssp2 peri 5 BCM281XX_SLAVE_CCU_SSP2
> - slave bsc1 peri 6 BCM281XX_SLAVE_CCU_BSC1
> - slave bsc2 peri 7 BCM281XX_SLAVE_CCU_BSC2
> - slave bsc3 peri 8 BCM281XX_SLAVE_CCU_BSC3
> - slave pwm peri 9 BCM281XX_SLAVE_CCU_PWM
> -
> -
> -BCM21664 family
> ----------------
> -CCU compatible string values for SoCs in the BCM21664 family are:
> - "brcm,bcm21664-root-ccu"
> - "brcm,bcm21664-aon-ccu"
> - "brcm,bcm21664-master-ccu"
> - "brcm,bcm21664-slave-ccu"
> -
> -The following table defines the set of CCUs and clock specifiers for
> -BCM21664 family clocks. When a clock consumer references a clocks,
> -its symbolic specifier (rather than its numeric index value) should
> -be used. These specifiers are defined in:
> - "include/dt-bindings/clock/bcm21664.h"
> -
> - CCU Clock Type Index Specifier
> - --- ----- ---- ----- ---------
> - root frac_1m peri 0 BCM21664_ROOT_CCU_FRAC_1M
> -
> - aon hub_timer peri 0 BCM21664_AON_CCU_HUB_TIMER
> -
> - master sdio1 peri 0 BCM21664_MASTER_CCU_SDIO1
> - master sdio2 peri 1 BCM21664_MASTER_CCU_SDIO2
> - master sdio3 peri 2 BCM21664_MASTER_CCU_SDIO3
> - master sdio4 peri 3 BCM21664_MASTER_CCU_SDIO4
> - master sdio1_sleep peri 4 BCM21664_MASTER_CCU_SDIO1_SLEEP
> - master sdio2_sleep peri 5 BCM21664_MASTER_CCU_SDIO2_SLEEP
> - master sdio3_sleep peri 6 BCM21664_MASTER_CCU_SDIO3_SLEEP
> - master sdio4_sleep peri 7 BCM21664_MASTER_CCU_SDIO4_SLEEP
> -
> - slave uartb peri 0 BCM21664_SLAVE_CCU_UARTB
> - slave uartb2 peri 1 BCM21664_SLAVE_CCU_UARTB2
> - slave uartb3 peri 2 BCM21664_SLAVE_CCU_UARTB3
> - slave uartb4 peri 3 BCM21664_SLAVE_CCU_UARTB4
> - slave bsc1 peri 4 BCM21664_SLAVE_CCU_BSC1
> - slave bsc2 peri 5 BCM21664_SLAVE_CCU_BSC2
> - slave bsc3 peri 6 BCM21664_SLAVE_CCU_BSC3
> - slave bsc4 peri 7 BCM21664_SLAVE_CCU_BSC4
> diff --git a/Documentation/devicetree/bindings/clock/brcm,kona-ccu.yaml b/Documentation/devicetree/bindings/clock/brcm,kona-ccu.yaml
> new file mode 100644
> index 000000000000..e5656950b3bd
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/brcm,kona-ccu.yaml
> @@ -0,0 +1,181 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/clock/brcm,kona-ccu.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Broadcom Kona family clock control units (CCU)
> +
> +maintainers:
> + - Florian Fainelli <florian.fainelli@...adcom.com>
> + - Ray Jui <rjui@...adcom.com>
> + - Scott Branden <sbranden@...adcom.com>
> +
> +description: |
> + Broadcom "Kona" style clock control unit (CCU) is a clock provider that
> + manages a set of clock signals.
> +
> + All available clock IDs are defined in
> + - include/dt-bindings/clock/bcm281xx.h for BCM281XX family
> + - include/dt-bindings/clock/bcm21664.h for BCM21664 family
> +
> +properties:
> + compatible:
> + enum:
> + - brcm,bcm11351-aon-ccu
> + - brcm,bcm11351-hub-ccu
> + - brcm,bcm11351-master-ccu
> + - brcm,bcm11351-root-ccu
> + - brcm,bcm11351-slave-ccu
> + - brcm,bcm21664-aon-ccu
> + - brcm,bcm21664-master-ccu
> + - brcm,bcm21664-root-ccu
> + - brcm,bcm21664-slave-ccu
> +
> + reg:
> + maxItems: 1
> +
> + '#clock-cells':
> + const: 1
> +
> + clock-output-names:
> + minItems: 1
> + maxItems: 10
> +
> +required:
> + - compatible
> + - reg
> + - '#clock-cells'
> + - clock-output-names
> +
> +allOf:
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: brcm,bcm11351-aon-ccu
> + then:
> + properties:
> + clock-output-names:
> + items:
> + - const: hub_timer
> + - const: pmu_bsc
> + - const: pmu_bsc_var
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: brcm,bcm11351-hub-ccu
> + then:
> + properties:
> + clock-output-names:
> + const: tmon_1m
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: brcm,bcm11351-master-ccu
> + then:
> + properties:
> + clock-output-names:
> + items:
> + - const: sdio1
> + - const: sdio2
> + - const: sdio3
> + - const: sdio4
> + - const: usb_ic
> + - const: hsic2_48m
> + - const: hsic2_12m
> + - if:
> + properties:
> + compatible:
> + contains:
> + enum:
> + - brcm,bcm11351-root-ccu
> + - brcm,bcm21664-root-ccu
> + then:
> + properties:
> + clock-output-names:
> + const: frac_1m
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: brcm,bcm11351-slave-ccu
> + then:
> + properties:
> + clock-output-names:
> + items:
> + - const: uartb
> + - const: uartb2
> + - const: uartb3
> + - const: uartb4
> + - const: ssp0
> + - const: ssp2
> + - const: bsc1
> + - const: bsc2
> + - const: bsc3
> + - const: pwm
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: brcm,bcm21664-aon-ccu
> + then:
> + properties:
> + clock-output-names:
> + const: hub_timer
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: brcm,bcm21664-master-ccu
> + then:
> + properties:
> + clock-output-names:
> + items:
> + - const: sdio1
> + - const: sdio2
> + - const: sdio3
> + - const: sdio4
> + - const: sdio1_sleep
> + - const: sdio2_sleep
> + - const: sdio3_sleep
> + - const: sdio4_sleep
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: brcm,bcm21664-slave-ccu
> + then:
> + properties:
> + clock-output-names:
> + items:
> + - const: uartb
> + - const: uartb2
> + - const: uartb3
> + - const: bsc1
> + - const: bsc2
> + - const: bsc3
> + - const: bsc4
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + clock-controller@...11000 {
> + compatible = "brcm,bcm11351-slave-ccu";
> + reg = <0x3e011000 0x0f00>;
> + #clock-cells = <1>;
> + clock-output-names = "uartb",
> + "uartb2",
> + "uartb3",
> + "uartb4",
> + "ssp0",
> + "ssp2",
> + "bsc1",
> + "bsc2",
> + "bsc3",
> + "pwm";
> + };
> +...
> --
> 2.34.1
>
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