[PATCH v6 07/19] clk: mediatek: Add MT8188 ccusys clock support

[Garmin Chang (張家銘)]

On Tue, 2023-03-14 at 10:05 +0100, AngeloGioacchino Del Regno wrote:
> Il 09/03/23 14:54, Garmin.Chang ha scritto:
> > Add MT8188 ccusys clock controller which provides clock gate
> > control in Camera Computing Unit.
> > 
> > Signed-off-by: Garmin.Chang <Garmin.Chang at mediatek.com>
> > ---
> >   drivers/clk/mediatek/Makefile         |  2 +-
> >   drivers/clk/mediatek/clk-mt8188-ccu.c | 48
> > +++++++++++++++++++++++++++
> >   2 files changed, 49 insertions(+), 1 deletion(-)
> >   create mode 100644 drivers/clk/mediatek/clk-mt8188-ccu.c
> > 
> > diff --git a/drivers/clk/mediatek/Makefile
> > b/drivers/clk/mediatek/Makefile
> > index a4189d28cecc..fb66d25e98fd 100644
> > --- a/drivers/clk/mediatek/Makefile
> > +++ b/drivers/clk/mediatek/Makefile
> > @@ -93,7 +93,7 @@ obj-$(CONFIG_COMMON_CLK_MT8186) += clk-mt8186-
> > mcu.o clk-mt8186-topckgen.o clk-mt
> >   				   clk-mt8186-cam.o clk-mt8186-mdp.o
> > clk-mt8186-ipe.o
> >   obj-$(CONFIG_COMMON_CLK_MT8188) += clk-mt8188-apmixedsys.o clk-
> > mt8188-topckgen.o \
> >   				   clk-mt8188-peri_ao.o clk-mt8188-
> > infra_ao.o \
> > -				   clk-mt8188-cam.o
> > +				   clk-mt8188-cam.o clk-mt8188-ccu.o
> 
> clk-mt8188-cam and clk-mt8188-ccu can go under a different
> configuration option
> for modularity.
> 
> For example...
> 
> obj-$(CONFIG_COMMON_CLK_MT8188_CAM) +=  ...ccu.o, ...cam.o
> 
> Please make sure, for boot performance purposes, to order them as:
> 
> obj-$(CONFIG_.....) += driver-clk1.o driver-requiring-clk1-clocks.o
> 
Thank you for your suggestions.

Ok, I will refer to other chips to modify mt8188 about this in v7.

> >   obj-$(CONFIG_COMMON_CLK_MT8192) += clk-mt8192.o
> >   obj-$(CONFIG_COMMON_CLK_MT8192_AUDSYS) += clk-mt8192-aud.o
> >   obj-$(CONFIG_COMMON_CLK_MT8192_CAMSYS) += clk-mt8192-cam.o
> > diff --git a/drivers/clk/mediatek/clk-mt8188-ccu.c
> > b/drivers/clk/mediatek/clk-mt8188-ccu.c
> > new file mode 100644
> > index 000000000000..b7380060f906
> > --- /dev/null
> > +++ b/drivers/clk/mediatek/clk-mt8188-ccu.c
> > @@ -0,0 +1,48 @@
> > +// SPDX-License-Identifier: GPL-2.0-only
> > +//
> > +// Copyright (c) 2022 MediaTek Inc.
> > +// Author: Garmin Chang <garmin.chang at mediatek.com>
> > +
> > +#include <linux/clk-provider.h>
> > +#include <linux/platform_device.h>
> > +#include <dt-bindings/clock/mediatek,mt8188-clk.h>
> > +
> > +#include "clk-gate.h"
> > +#include "clk-mtk.h"
> > +
> > +static const struct mtk_gate_regs ccu_cg_regs = {
> > +	.set_ofs = 0x4,
> > +	.clr_ofs = 0x8,
> > +	.sta_ofs = 0x0,
> > +};
> > +
> > +#define GATE_CCU(_id, _name, _parent, _shift)			
> > \
> > +	GATE_MTK(_id, _name, _parent, &ccu_cg_regs, _shift,
> > &mtk_clk_gate_ops_setclr)
> > +
> > +static const struct mtk_gate ccu_clks[] = {
> > +	GATE_CCU(CLK_CCU_LARB27, "ccu_larb27", "top_ccu", 0),
> > +	GATE_CCU(CLK_CCU_AHB, "ccu_ahb", "top_ccu", 1),
> > +	GATE_CCU(CLK_CCU_CCU0, "ccu_ccu0", "top_ccu", 2),
> > +};
> > +
> > +static const struct mtk_clk_desc ccu_desc = {
> > +	.clks = ccu_clks,
> > +	.num_clks = ARRAY_SIZE(ccu_clks),
> > +};
> > +
> > +static const struct of_device_id of_match_clk_mt8188_ccu[] = {
> > +	{ .compatible = "mediatek,mt8188-ccusys", .data = &ccu_desc},
> 
> Missing space: { [...] &ccu_desc },
> 
Ok, I'll fix this in v7.

> > +	{ /* sentinel */ }
> > +};
> > +
> > +static struct platform_driver clk_mt8188_ccu_drv = {
> > +	.probe = mtk_clk_simple_probe,
> > +	.remove = mtk_clk_simple_remove,
> > +	.driver = {
> > +		.name = "clk-mt8188-ccu",
> > +		.of_match_table = of_match_clk_mt8188_ccu,
> > +	},
> > +};
> > +
> > +builtin_platform_driver(clk_mt8188_ccu_drv);
> 
> module_platform_driver
> 
> > +MODULE_LICENSE("GPL");
> 
>