linux-kernel - Re: [PATCH v4 3/4] clk: sophgo: Add SG2042 clock generator driver

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Message-ID: <IA1PR20MB4953B7BBA12262E0ECAC2B04BB85A@IA1PR20MB4953.namprd20.prod.outlook.com>
Date:   Tue,  5 Dec 2023 14:34:30 +0800
From:   Inochi Amaoto <inochiama@...look.com>
To:     Chen Wang <unicorn_wang@...look.com>
Cc:     Inochi Amaoto <inochiama@...look.com>,
        Chen Wang <unicornxw@...il.com>, aou@...s.berkeley.edu,
        chao.wei@...hgo.com, conor@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, mturquette@...libre.com,
        palmer@...belt.com, paul.walmsley@...ive.com,
        richardcochran@...il.com, robh+dt@...nel.org, sboyd@...nel.org,
        devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
        haijiao.liu@...hgo.com, xiaoguang.xing@...hgo.com,
        guoren@...nel.org, jszhang@...nel.org, samuel.holland@...ive.com
Subject: Re: [PATCH v4 3/4] clk: sophgo: Add SG2042 clock generator driver

>On 2023/12/5 9:13, Inochi Amaoto wrote:
>>> From: Chen Wang <unicorn_wang@...look.com>
>>>
>>> Add a driver for the SOPHGO SG2042 clock generator.
>>>
>>> Signed-off-by: Chen Wang <unicorn_wang@...look.com>
>>> ---
>>> MAINTAINERS                            |    7 +
>>> drivers/clk/Kconfig                    |    1 +
>>> drivers/clk/Makefile                   |    1 +
>>> drivers/clk/sophgo/Kconfig             |    8 +
>>> drivers/clk/sophgo/Makefile            |    2 +
>>> drivers/clk/sophgo/clk-sophgo-sg2042.c | 1371 ++++++++++++++++++++++++
>>> drivers/clk/sophgo/clk-sophgo-sg2042.h |  226 ++++
>>> 7 files changed, 1616 insertions(+)
>>> create mode 100644 drivers/clk/sophgo/Kconfig
>>> create mode 100644 drivers/clk/sophgo/Makefile
>>> create mode 100644 drivers/clk/sophgo/clk-sophgo-sg2042.c
>>> create mode 100644 drivers/clk/sophgo/clk-sophgo-sg2042.h
>>>
>>> diff --git a/MAINTAINERS b/MAINTAINERS
>>> index 97f51d5ec1cf..c9c75468f2cb 100644
>>> --- a/MAINTAINERS
>>> +++ b/MAINTAINERS
>>> @@ -20269,6 +20269,13 @@ S:    Maintained
>>> F:    arch/riscv/boot/dts/sophgo/
>>> F:    Documentation/devicetree/bindings/riscv/sophgo.yaml
>>>
>>> +SOPHGO CLOCK DRIVER
>>> +M:    Chen Wang <unicorn_wang@...look.com>
>>> +S:    Maintained
>>> +F:    Documentation/devicetree/bindings/clock/sophgo/
>>> +F:    drivers/clk/sophgo/
>>> +F:    include/dt-bindings/clock/sophgo,sg2042-clkgen.h
>>> +
>>> SOUND
>>> M:    Jaroslav Kysela <perex@...ex.cz>
>>> M:    Takashi Iwai <tiwai@...e.com>
>>> diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
>>> index c30d0d396f7a..514343934fda 100644
>>> --- a/drivers/clk/Kconfig
>>> +++ b/drivers/clk/Kconfig
>>> @@ -499,6 +499,7 @@ source "drivers/clk/rockchip/Kconfig"
>>> source "drivers/clk/samsung/Kconfig"
>>> source "drivers/clk/sifive/Kconfig"
>>> source "drivers/clk/socfpga/Kconfig"
>>> +source "drivers/clk/sophgo/Kconfig"
>>> source "drivers/clk/sprd/Kconfig"
>>> source "drivers/clk/starfive/Kconfig"
>>> source "drivers/clk/sunxi/Kconfig"
>>> diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
>>> index ed71f2e0ee36..aa5d2cf0b6a6 100644
>>> --- a/drivers/clk/Makefile
>>> +++ b/drivers/clk/Makefile
>>> @@ -119,6 +119,7 @@ obj-$(CONFIG_ARCH_ROCKCHIP)        += rockchip/
>>> obj-$(CONFIG_COMMON_CLK_SAMSUNG)    += samsung/
>>> obj-$(CONFIG_CLK_SIFIVE)        += sifive/
>>> obj-y                    += socfpga/
>>> +obj-$(CONFIG_ARCH_SOPHGO)        += sophgo/
>>> obj-$(CONFIG_PLAT_SPEAR)        += spear/
>>> obj-y                    += sprd/
>>> obj-$(CONFIG_ARCH_STI)            += st/
>>> diff --git a/drivers/clk/sophgo/Kconfig b/drivers/clk/sophgo/Kconfig
>>> new file mode 100644
>>> index 000000000000..b0fbe4499870
>>> --- /dev/null
>>> +++ b/drivers/clk/sophgo/Kconfig
>>> @@ -0,0 +1,8 @@
>>> +# SPDX-License-Identifier: GPL-2.0
>>> +
>>> +config CLK_SOPHGO_SG2042
>>> +    bool "Sophgo SG2042 clock support"
>>> +    depends on ARCH_SOPHGO || COMPILE_TEST
>>> +    default ARCH_SOPHGO
>>> +    help
>>> +      Say yes here to support the clock controller on the Sophgo SG2042 SoC.
>> Please add RISCV to its depends. Not all the sophgo SoCs are in the RISC-V
>> platform, Some are arm chips. It is not good to build this driver
>> in that arch.
>ARCH_SOPHGO is only defined in RISC-V arch, so I think RISCV should not be needed as depends.

It needs for the SG200X. which has a arm core. Maybe we should left it now
and add this in the future.

>>
>> Also, the condition ARCH_SOPHGO is duplicate in the Makefile. Please
>> remove one of them.
>
>Don't undestand your question "the condition ARCH_SOPHGO is duplicate in the Makefile ",  I think you are talking about Kconifg, what Makefile are you talking about?
>

I mean your change in drivers/clk/Makefile.

>>> diff --git a/drivers/clk/sophgo/Makefile b/drivers/clk/sophgo/Makefile
>>> new file mode 100644
>>> index 000000000000..13834cce260c
>>> --- /dev/null
>>> +++ b/drivers/clk/sophgo/Makefile
>>> @@ -0,0 +1,2 @@
>>> +# SPDX-License-Identifier: GPL-2.0
>>> +obj-$(CONFIG_CLK_SOPHGO_SG2042)    += clk-sophgo-sg2042.o
>>> diff --git a/drivers/clk/sophgo/clk-sophgo-sg2042.c b/drivers/clk/sophgo/clk-sophgo-sg2042.c
>>> new file mode 100644
>>> index 000000000000..421ebcc7192b
>>> ......
>>> +        }
>>> +
>>> +#if defined(DEBUG)
>>> +        pr_info("registered [%d : %s]\n", gate->id, gate->name);
>>> +#endif
>> Drop, no need for this.
>
>OK, this log should not be needed, I will remove it in next version.
>
>