linux-kernel - Re: [PATCH v12 4/9] dt-bindings: clock: Add bindings for SP7021 clock driver

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Date:   Fri, 1 Apr 2022 11:32:21 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     qinjian[覃健] <qinjian@...lus1.com>
Cc:     "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mturquette@...libre.com" <mturquette@...libre.com>,
        "sboyd@...nel.org" <sboyd@...nel.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "maz@...nel.org" <maz@...nel.org>,
        "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        "arnd@...db.de" <arnd@...db.de>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>
Subject: Re: [PATCH v12 4/9] dt-bindings: clock: Add bindings for SP7021 clock
 driver

On 01/04/2022 11:19, qinjian[覃健] wrote:
>>> diff --git a/include/dt-bindings/clock/sp-sp7021.h b/include/dt-bindings/clock/sp-sp7021.h
>>> new file mode 100644
>>> index 000000000..45dac6de8
>>> --- /dev/null
>>> +++ b/include/dt-bindings/clock/sp-sp7021.h
>>> @@ -0,0 +1,112 @@
>>> +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
>>> +/*
>>> + * Copyright (C) Sunplus Technology Co., Ltd.
>>> + *       All rights reserved.
>>> + */
>>> +#ifndef _DT_BINDINGS_CLOCK_SUNPLUS_SP7021_H
>>> +#define _DT_BINDINGS_CLOCK_SUNPLUS_SP7021_H
>>> +
>>> +#define XTAL			27000000
>>> +
>>> +/* plls */
>>> +#define PLL_A			0
>>> +#define PLL_E			1
>>> +#define PLL_E_2P5		2
>>> +#define PLL_E_25		3
>>> +#define PLL_E_112P5		4
>>> +#define PLL_F			5
>>> +#define PLL_TV			6
>>> +#define PLL_TV_A		7
>>> +#define PLL_SYS			8
>>> +
>>> +/* gates: mo_clken0 ~ mo_clken9 */
>>> +#define CLK_SYSTEM		0x10
>>> +#define CLK_RTC			0x12
>>
>> YAML looks ok, but here comment from Arnd also applies. These should be
>> regular decimal numbers incremented by one.
>>
>> Best regards,
>> Krzysztof
> 
> Yes, same as reset driver, these defines also mapping the hardware.
> But different from reset driver, clk driver also used these defines.
> If I removed this defines, I  must write the proper hardware number twice in dt & driver.
> It's meaningless & hard to check.

Not really... just follow what most (or all) clock drivers are doing -
incremental IDs.



Best regards,
Krzysztof