linux-kernel - Re: [PATCH 06/22] clk: mediatek: Add MT8195 audio src clock support

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Date:   Mon, 5 Jul 2021 18:07:19 +0800
From:   Chen-Yu Tsai <wenst@...omium.org>
To:     Chun-Jie Chen <chun-jie.chen@...iatek.com>
Cc:     Matthias Brugger <matthias.bgg@...il.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Nicolas Boichat <drinkcat@...omium.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mediatek@...ts.infradead.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, srv_heupstream@...iatek.com,
        Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH 06/22] clk: mediatek: Add MT8195 audio src clock support

Hi,

On Thu, Jun 17, 2021 at 06:47:27AM +0800, Chun-Jie Chen wrote:
> Add MT8195 audio src source clock provider
> 
> Signed-off-by: Chun-Jie Chen <chun-jie.chen@...iatek.com>
> ---
>  drivers/clk/mediatek/Kconfig              |  6 +++
>  drivers/clk/mediatek/Makefile             |  1 +
>  drivers/clk/mediatek/clk-mt8195-aud_src.c | 60 +++++++++++++++++++++++
>  3 files changed, 67 insertions(+)
>  create mode 100644 drivers/clk/mediatek/clk-mt8195-aud_src.c
> 
> diff --git a/drivers/clk/mediatek/Kconfig b/drivers/clk/mediatek/Kconfig
> index e2bae9d490a4..62dd02bc2755 100644
> --- a/drivers/clk/mediatek/Kconfig
> +++ b/drivers/clk/mediatek/Kconfig
> @@ -594,6 +594,12 @@ config COMMON_CLK_MT8195_AUDSYS
>  	help
>  	  This driver supports MediaTek MT8195 audsys clocks.
>  
> +config COMMON_CLK_MT8195_AUDSYS_SRC
> +	bool "Clock driver for MediaTek MT8195 audsys_src"
> +	depends on COMMON_CLK_MT8195
> +	help
> +	  This driver supports MediaTek MT8195 audsys_src clocks.
> +

Same comments regarding the Kconfig symbol as the previous patch.

>  config COMMON_CLK_MT8516
>  	bool "Clock driver for MediaTek MT8516"
>  	depends on ARCH_MEDIATEK || COMPILE_TEST
> diff --git a/drivers/clk/mediatek/Makefile b/drivers/clk/mediatek/Makefile
> index f27c04314186..52a5d3f49ff0 100644
> --- a/drivers/clk/mediatek/Makefile
> +++ b/drivers/clk/mediatek/Makefile
> @@ -82,5 +82,6 @@ obj-$(CONFIG_COMMON_CLK_MT8192_VDECSYS) += clk-mt8192-vdec.o
>  obj-$(CONFIG_COMMON_CLK_MT8192_VENCSYS) += clk-mt8192-venc.o
>  obj-$(CONFIG_COMMON_CLK_MT8195) += clk-mt8195.o
>  obj-$(CONFIG_COMMON_CLK_MT8195_AUDSYS) += clk-mt8195-aud.o
> +obj-$(CONFIG_COMMON_CLK_MT8195_AUDSYS_SRC) += clk-mt8195-aud_src.o
>  obj-$(CONFIG_COMMON_CLK_MT8516) += clk-mt8516.o
>  obj-$(CONFIG_COMMON_CLK_MT8516_AUDSYS) += clk-mt8516-aud.o
> diff --git a/drivers/clk/mediatek/clk-mt8195-aud_src.c b/drivers/clk/mediatek/clk-mt8195-aud_src.c
> new file mode 100644
> index 000000000000..7cabe0d68825
> --- /dev/null
> +++ b/drivers/clk/mediatek/clk-mt8195-aud_src.c
> @@ -0,0 +1,60 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +//
> +// Copyright (c) 2021 MediaTek Inc.
> +// Author: Chun-Jie Chen <chun-jie.chen@...iatek.com>
> +
> +#include <linux/clk-provider.h>
> +#include <linux/platform_device.h>
> +
> +#include "clk-mtk.h"
> +#include "clk-gate.h"
> +
> +#include <dt-bindings/clock/mt8195-clk.h>
> +
> +static const struct mtk_gate_regs aud_src_cg_regs = {
> +	.set_ofs = 0x1004,
> +	.clr_ofs = 0x1004,
> +	.sta_ofs = 0x1004,
> +};
> +
> +#define GATE_AUD_SRC(_id, _name, _parent, _shift)			\
> +	GATE_MTK(_id, _name, _parent, &aud_src_cg_regs, _shift, &mtk_clk_gate_ops_no_setclr)
> +
> +static const struct mtk_gate aud_src_clks[] = {
> +	GATE_AUD_SRC(CLK_AUD_SRC_ASRC0, "aud_src_asrc0", "asm_h_sel", 0),
> +	GATE_AUD_SRC(CLK_AUD_SRC_ASRC1, "aud_src_asrc1", "asm_h_sel", 1),
> +	GATE_AUD_SRC(CLK_AUD_SRC_ASRC2, "aud_src_asrc2", "asm_h_sel", 2),
> +	GATE_AUD_SRC(CLK_AUD_SRC_ASRC3, "aud_src_asrc3", "asm_h_sel", 3),
> +	GATE_AUD_SRC(CLK_AUD_SRC_ASRC4, "aud_src_asrc4", "asm_h_sel", 4),
> +	GATE_AUD_SRC(CLK_AUD_SRC_ASRC5, "aud_src_asrc5", "asm_h_sel", 5),
> +	GATE_AUD_SRC(CLK_AUD_SRC_ASRC6, "aud_src_asrc6", "asm_h_sel", 6),
> +	GATE_AUD_SRC(CLK_AUD_SRC_ASRC7, "aud_src_asrc7", "asm_h_sel", 7),
> +	GATE_AUD_SRC(CLK_AUD_SRC_ASRC8, "aud_src_asrc8", "asm_h_sel", 8),
> +	GATE_AUD_SRC(CLK_AUD_SRC_ASRC9, "aud_src_asrc9", "asm_h_sel", 9),
> +	GATE_AUD_SRC(CLK_AUD_SRC_ASRC10, "aud_src_asrc10", "asm_h_sel", 10),
> +	GATE_AUD_SRC(CLK_AUD_SRC_ASRC11, "aud_src_asrc11", "asm_h_sel", 11),

And same thing about moving this into the audio driver. AFAICT there is
no audio driver supporting this hardware block, so this will never get
used.


Regards
ChenYu