linux-kernel - Re: [PATCH v10 3/5] dt-bindings: clock: meson: add A1 PLL and Peripherals clkcs bindings

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Date:   Tue, 14 Mar 2023 12:28:40 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Dmitry Rokosov <ddrokosov@...rdevices.ru>,
        neil.armstrong@...aro.org, jbrunet@...libre.com,
        mturquette@...libre.com, sboyd@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, khilman@...libre.com,
        martin.blumenstingl@...glemail.com
Cc:     jian.hu@...ogic.com, kernel@...rdevices.ru, rockosov@...il.com,
        linux-amlogic@...ts.infradead.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v10 3/5] dt-bindings: clock: meson: add A1 PLL and
 Peripherals clkcs bindings

On 13/03/2023 21:12, Dmitry Rokosov wrote:
> Add the documentation for Amlogic A1 PLL and Amlogic A1 Peripherals
> clock drivers.
> Introduce Amlogic A1 PLL and Amlogic A1 Peripherals device tree
> bindings and include them to MAINTAINERS.
> 


>  
> diff --git a/include/dt-bindings/clock/amlogic,a1-clkc.h b/include/dt-bindings/clock/amlogic,a1-clkc.h
> new file mode 100644
> index 000000000000..2b16b1f1a5bf
> --- /dev/null
> +++ b/include/dt-bindings/clock/amlogic,a1-clkc.h
> @@ -0,0 +1,100 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */

???

> +#define CLKID_SPIFC		84
> +#define CLKID_USB_BUS		85
> +#define CLKID_SD_EMMC		86
> +#define CLKID_PSRAM		87
> +#define CLKID_DMC		88

And what is here? Between 88 and 121?

> +#define CLKID_GEN_SEL		121
> +
> +#endif /* __A1_CLKC_H */
> diff --git a/include/dt-bindings/clock/amlogic,a1-pll-clkc.h b/include/dt-bindings/clock/amlogic,a1-pll-clkc.h
> new file mode 100644
> index 000000000000..8e97d3fb9d30
> --- /dev/null
> +++ b/include/dt-bindings/clock/amlogic,a1-pll-clkc.h
> @@ -0,0 +1,20 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */

I found in changelog:
"fix license issue, it's GPL-2.0+ only in the current version"
and I do not understand.

The license is wrong, so what did you fix?

> +/*
> + * Copyright (c) 2019 Amlogic, Inc. All rights reserved.
> + * Author: Jian Hu <jian.hu@...ogic.com>
> + *
> + * Copyright (c) 2023, SberDevices. All Rights Reserved.
> + * Author: Dmitry Rokosov <ddrokosov@...rdevices.ru>
> + */
> +
> +#ifndef __A1_PLL_CLKC_H
> +#define __A1_PLL_CLKC_H
> +
> +#define CLKID_FIXED_PLL		1
> +#define CLKID_FCLK_DIV2		6
> +#define CLKID_FCLK_DIV3		7
> +#define CLKID_FCLK_DIV5		8
> +#define CLKID_FCLK_DIV7		9
> +#define CLKID_HIFI_PLL		10


Probably I asked about this... why indices are not continuous? You know
that consumers are allowed to use number 2 and it will be your ABI, even
though you did not write it in the binding? That's a tricky and
confusing pattern for no real gains.

Best regards,
Krzysztof