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SubjectRe: [PATCH V2 2/4] Documentation: bindings: clk: Add bindings for i.MX BLK_CTL
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Hi Rob,

On 2021/5/6 7:08, Rob Herring wrote:
> On Fri, Apr 30, 2021 at 01:27:44PM +0800, Peng Fan (OSS) wrote:
>> From: Peng Fan <peng.fan@nxp.com>
>>
>> Document the i.MX BLK_CTL with its devicetree properties.
>>
>> Signed-off-by: Peng Fan <peng.fan@nxp.com>
>> ---
>> .../bindings/soc/imx/fsl,imx-blk-ctl.yaml | 73 +++++++++++++++++++
>> 1 file changed, 73 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml b/Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml
>> new file mode 100644
>> index 000000000000..a491b63de50c
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml
>> @@ -0,0 +1,73 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/soc/imx/fsl,imx-blk-ctl.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: NXP i.MX BLK_CTL
>> +
>> +maintainers:
>> + - Peng Fan <peng.fan@nxp.com>
>> +
>> +description:
>> + i.MX BLK_CTL is a conglomerate of different GPRs that are
>> + dedicated to a specific subsystem. It usually contains
>> + clocks and resets amongst other things. Here we take the clocks
>> + and resets as virtual PDs, the reason we could not take it as
>> + clock provider is there is A/B lock issue between power domain
>> + and clock.
>> +
>> +properties:
>> + compatible:
>> + items:
>> + - enum:
>> + - fsl,imx8mm-dispmix-blk-ctl
>> + - fsl,imx8mm-vpumix-blk-ctl
>> + - const: syscon
>> +
>> + reg:
>> + maxItems: 1
>> +
>> + "#power-domain-cells":
>> + const: 1
>> +
>> + power-domains:
>> + minItems: 1
>> + maxItems: 32
>> +
>> + power-domain-names:
>> + minItems: 1
>> + maxItems: 32
>
> Please describe why there's a range and we don't enumerate each entry.

Each BLK-CTL have different input power domains, they
have different names. So it is hard to write down each
power domain for each BLK-CTL.

Same to below clocks and clock-names.

Thanks,
Peng.

>
>> +
>> + '#reset-cells':
>> + const: 1
>> +
>> + clocks:
>> + minItems: 1
>> + maxItems: 32
>> +
>> + clock-names:
>> + minItems: 1
>> + maxItems: 32
>> +
>> +required:
>> + - compatible
>> + - reg
>> + - power-domains
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> + - |
>> + #include <dt-bindings/clock/imx8mm-clock.h>
>> +
>> + dispmix_blk_ctl: blk-ctl@32e28000 {
>> + compatible = "fsl,imx8mm-dispmix-blk-ctl", "syscon";
>> + reg = <0x32e28000 0x100>;
>> + #power-domain-cells = <1>;
>> + power-domains = <&pgc_dispmix>, <&pgc_mipi>;
>> + power-domain-names = "dispmix", "mipi";
>> + clocks = <&clk IMX8MM_CLK_DISP_ROOT>, <&clk IMX8MM_CLK_DISP_AXI_ROOT>,
>> + <&clk IMX8MM_CLK_DISP_APB_ROOT>;
>> + clock-names = "disp", "axi", "apb";
>> + };
>> --
>> 2.30.0
>>

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