linux-kernel - Re: [PATCH 09/22] clk: mediatek: Add MT8195 imgsys clock support

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Date:   Tue, 6 Jul 2021 17:07:09 +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,
        LKML <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 09/22] clk: mediatek: Add MT8195 imgsys clock support

Hi,

On Thu, Jun 17, 2021 at 7:01 AM Chun-Jie Chen
<chun-jie.chen@...iatek.com> wrote:
>
> Add MT8195 imgsys clock providers
>
> 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-img.c | 98 +++++++++++++++++++++++++++
>  3 files changed, 105 insertions(+)
>  create mode 100644 drivers/clk/mediatek/clk-mt8195-img.c
>
> diff --git a/drivers/clk/mediatek/Kconfig b/drivers/clk/mediatek/Kconfig
> index 6a6e496d08a4..f92d0b6b7eec 100644
> --- a/drivers/clk/mediatek/Kconfig
> +++ b/drivers/clk/mediatek/Kconfig
> @@ -612,6 +612,12 @@ config COMMON_CLK_MT8195_CCUSYS
>         help
>           This driver supports MediaTek MT8195 ccusys clocks.
>
> +config COMMON_CLK_MT8195_IMGSYS
> +       bool "Clock driver for MediaTek MT8195 imgsys"
> +       depends on COMMON_CLK_MT8195
> +       help
> +         This driver supports MediaTek MT8195 imgsys clocks.
> +
>  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 bb8aac6f9185..1768eda917c2 100644
> --- a/drivers/clk/mediatek/Makefile
> +++ b/drivers/clk/mediatek/Makefile
> @@ -85,5 +85,6 @@ obj-$(CONFIG_COMMON_CLK_MT8195_AUDSYS) += clk-mt8195-aud.o
>  obj-$(CONFIG_COMMON_CLK_MT8195_AUDSYS_SRC) += clk-mt8195-aud_src.o
>  obj-$(CONFIG_COMMON_CLK_MT8195_CAMSYS) += clk-mt8195-cam.o
>  obj-$(CONFIG_COMMON_CLK_MT8195_CCUSYS) += clk-mt8195-ccu.o
> +obj-$(CONFIG_COMMON_CLK_MT8195_IMGSYS) += clk-mt8195-img.o
>  obj-$(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-img.c b/drivers/clk/mediatek/clk-mt8195-img.c
> new file mode 100644
> index 000000000000..923fa82aedae
> --- /dev/null
> +++ b/drivers/clk/mediatek/clk-mt8195-img.c
> @@ -0,0 +1,98 @@
> +// 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 img_cg_regs = {
> +       .set_ofs = 0x4,
> +       .clr_ofs = 0x8,
> +       .sta_ofs = 0x0,
> +};
> +
> +#define GATE_IMG(_id, _name, _parent, _shift)                  \
> +       GATE_MTK(_id, _name, _parent, &img_cg_regs, _shift, &mtk_clk_gate_ops_setclr)
> +
> +static const struct mtk_gate img_clks[] = {
> +       GATE_IMG(CLK_IMG_LARB9, "img_larb9", "img_sel", 0),
> +       GATE_IMG(CLK_IMG_TRAW0, "img_traw0", "img_sel", 1),
> +       GATE_IMG(CLK_IMG_TRAW1, "img_traw1", "img_sel", 2),
> +       GATE_IMG(CLK_IMG_TRAW2, "img_traw2", "img_sel", 3),
> +       GATE_IMG(CLK_IMG_TRAW3, "img_traw3", "img_sel", 4),
> +       GATE_IMG(CLK_IMG_DIP0, "img_dip0", "img_sel", 8),
> +       GATE_IMG(CLK_IMG_WPE0, "img_wpe0", "img_sel", 9),
> +       GATE_IMG(CLK_IMG_IPE, "img_ipe", "img_sel", 10),
> +       GATE_IMG(CLK_IMG_DIP1, "img_dip1", "img_sel", 11),
> +       GATE_IMG(CLK_IMG_WPE1, "img_wpe1", "img_sel", 12),
> +       GATE_IMG(CLK_IMG_GALS, "img_gals", "img_sel", 31),
> +};
> +
> +static const struct mtk_gate img1_dip_top_clks[] = {
> +       GATE_IMG(CLK_IMG1_DIP_TOP_LARB10, "img1_dip_top_larb10", "img_sel", 0),
> +       GATE_IMG(CLK_IMG1_DIP_TOP_DIP_TOP, "img1_dip_top_dip_top", "img_sel", 1),
> +};
> +
> +static const struct mtk_gate img1_dip_nr_clks[] = {
> +       GATE_IMG(CLK_IMG1_DIP_NR_RESERVE, "img1_dip_nr_reserve", "img_sel", 0),

Adding a clock for a bit that is named "reserved" is sort of weird.
Does it actually exist and function?

Otherwise,

Reviewed-by: Chen-Yu Tsai <wenst@...omium.org>