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Message-ID: <ba2e1997e3fd290dc6d6f6a77db3cb7b8ad0bbde.camel@mediatek.com>
Date: Fri, 31 Mar 2023 05:50:21 +0000
From: Garmin Chang (張家銘)
<Garmin.Chang@...iatek.com>
To: "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
"sboyd@...nel.org" <sboyd@...nel.org>,
"mturquette@...libre.com" <mturquette@...libre.com>,
"angelogioacchino.delregno@...labora.com"
<angelogioacchino.delregno@...labora.com>,
"robh+dt@...nel.org" <robh+dt@...nel.org>,
"krzysztof.kozlowski+dt@...aro.org"
<krzysztof.kozlowski+dt@...aro.org>,
"richardcochran@...il.com" <richardcochran@...il.com>
CC: "linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-mediatek@...ts.infradead.org"
<linux-mediatek@...ts.infradead.org>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
Project_Global_Chrome_Upstream_Group
<Project_Global_Chrome_Upstream_Group@...iatek.com>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH v6 02/19] clk: mediatek: Add MT8188 apmixedsys clock
support
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 apmixedsys clock controller which provides Plls
> > generated from SoC 26m and ssusb clock gate control.
> >
> > Signed-off-by: Garmin.Chang <Garmin.Chang@...iatek.com>
> > ---
> > drivers/clk/mediatek/Kconfig | 11 ++
> > drivers/clk/mediatek/Makefile | 1 +
> > drivers/clk/mediatek/clk-mt8188-apmixedsys.c | 154
> > +++++++++++++++++++
> > 3 files changed, 166 insertions(+)
> > create mode 100644 drivers/clk/mediatek/clk-mt8188-apmixedsys.c
> >
> > diff --git a/drivers/clk/mediatek/Kconfig
> > b/drivers/clk/mediatek/Kconfig
> > index 2d14855dd37e..d7115089c4f6 100644
> > --- a/drivers/clk/mediatek/Kconfig
> > +++ b/drivers/clk/mediatek/Kconfig
> > @@ -604,6 +604,17 @@ config COMMON_CLK_MT8186
> > help
> > This driver supports MediaTek MT8186 clocks.
> >
> > +config COMMON_CLK_MT8188
> > + bool "Clock driver for MediaTek MT8188"
>
> this can be a tristate.
>
> > + depends on ARM64 || COMPILE_TEST
> > + select COMMON_CLK_MEDIATEK
> > + default ARCH_MEDIATEK
> > + help
> > + This driver supports MediaTek MT8188 basic clocks and clocks
> > + required for various peripheral found on MediaTek. Choose
> > + M or Y here if you want to use clocks such as peri_ao,
> > + infra_ao, etc.
> > +
> > config COMMON_CLK_MT8192
> > bool "Clock driver for MediaTek MT8192"
> > depends on ARM64 || COMPILE_TEST
> > diff --git a/drivers/clk/mediatek/Makefile
> > b/drivers/clk/mediatek/Makefile
> > index e5d018270ed0..1f822fcf6084 100644
> > --- a/drivers/clk/mediatek/Makefile
> > +++ b/drivers/clk/mediatek/Makefile
> > @@ -91,6 +91,7 @@ obj-$(CONFIG_COMMON_CLK_MT8186) += clk-mt8186-
> > mcu.o clk-mt8186-topckgen.o clk-mt
> > clk-mt8186-mfg.o clk-mt8186-mm.o
> > clk-mt8186-wpe.o \
> > clk-mt8186-img.o clk-mt8186-vdec.o
> > clk-mt8186-venc.o \
> > clk-mt8186-cam.o clk-mt8186-mdp.o
> > clk-mt8186-ipe.o
> > +obj-$(CONFIG_COMMON_CLK_MT8188) += clk-mt8188-apmixedsys.o
> > 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-apmixedsys.c
> > b/drivers/clk/mediatek/clk-mt8188-apmixedsys.c
> > new file mode 100644
> > index 000000000000..db64340386d9
> > --- /dev/null
> > +++ b/drivers/clk/mediatek/clk-mt8188-apmixedsys.c
> > @@ -0,0 +1,154 @@
> > +// SPDX-License-Identifier: GPL-2.0-only
>
> // SPDX ...
> /*
> * Copyright ...
> * Author ..
> */
>
> > +//
> > +// Copyright (c) 2022 MediaTek Inc.
> > +// Author: Garmin Chang <garmin.chang@...iatek.com>
> > +
> > +#include <linux/of_device.h>
> > +#include <linux/platform_device.h>
> > +#include <dt-bindings/clock/mediatek,mt8188-clk.h>
>
> Please order by name: dt-bindings goes first.
>
Thank you for your suggestions.
Ok, I would modify this and below in v7.
> > +
> > +#include "clk-gate.h"
> > +#include "clk-mtk.h"
> > +#include "clk-pll.h"
> > +
> > +static const struct mtk_gate_regs apmixed_cg_regs = {
> > + .set_ofs = 0x8,
> > + .clr_ofs = 0x8,
> > + .sta_ofs = 0x8,
> > +};
> > +
> > +#define GATE_APMIXED(_id, _name, _parent, _shift)
> > \
> > + GATE_MTK(_id, _name, _parent, &apmixed_cg_regs, _shift,
> > &mtk_clk_gate_ops_no_setclr_inv)
> > +
> > +static const struct mtk_gate apmixed_clks[] = {
> > + GATE_APMIXED(CLK_APMIXED_PLL_SSUSB26M_EN, "pll_ssusb26m_en",
> > "clk26m", 1),
> > +};
> > +
> > +#define MT8188_PLL_FMAX (3800UL * MHZ)
> > +#define MT8188_PLL_FMIN (1500UL * MHZ)
> > +#define MT8188_INTEGER_BITS 8
> > +
> > +#define PLL(_id, _name, _reg, _pwr_reg, _en_mask, _flags,
> > \
> > + _rst_bar_mask, _pcwbits, _pd_reg, _pd_shift, \
> > + _tuner_reg, _tuner_en_reg, _tuner_en_bit,
> > \
> > + _pcw_reg, _pcw_shift, _pcw_chg_reg,
> > \
> > + _en_reg, _pll_en_bit) { \
> > + .id = _id, \
> > + .name = _name,
> > \
> > + .reg = _reg,
> > \
> > + .pwr_reg = _pwr_reg,
> > \
> > + .en_mask = _en_mask,
> > \
> > + .flags = _flags, \
> > + .rst_bar_mask = _rst_bar_mask,
> > \
> > + .fmax = MT8188_PLL_FMAX, \
> > + .fmin = MT8188_PLL_FMIN, \
> > + .pcwbits = _pcwbits,
> > \
> > + .pcwibits = MT8188_INTEGER_BITS, \
> > + .pd_reg = _pd_reg, \
> > + .pd_shift = _pd_shift,
> > \
> > + .tuner_reg = _tuner_reg, \
> > + .tuner_en_reg = _tuner_en_reg,
> > \
> > + .tuner_en_bit = _tuner_en_bit,
> > \
> > + .pcw_reg = _pcw_reg,
> > \
> > + .pcw_shift = _pcw_shift, \
> > + .pcw_chg_reg = _pcw_chg_reg,
> > \
> > + .en_reg = _en_reg, \
> > + .pll_en_bit = _pll_en_bit, \
> > + }
> > +
> > +static const struct mtk_pll_data plls[] = {
> > + PLL(CLK_APMIXED_ETHPLL, "ethpll", 0x044C, 0x0458, 0,
> > + 0, 0, 22, 0x0450, 24, 0, 0, 0, 0x0450, 0, 0, 0, 9),
> > + PLL(CLK_APMIXED_MSDCPLL, "msdcpll", 0x0514, 0x0520, 0,
> > + 0, 0, 22, 0x0518, 24, 0, 0, 0, 0x0518, 0, 0, 0, 9),
> > + PLL(CLK_APMIXED_TVDPLL1, "tvdpll1", 0x0524, 0x0530, 0,
> > + 0, 0, 22, 0x0528, 24, 0, 0, 0, 0x0528, 0, 0, 0, 9),
> > + PLL(CLK_APMIXED_TVDPLL2, "tvdpll2", 0x0534, 0x0540, 0,
> > + 0, 0, 22, 0x0538, 24, 0, 0, 0, 0x0538, 0, 0, 0, 9),
> > + PLL(CLK_APMIXED_MMPLL, "mmpll", 0x0544, 0x0550, 0xff000000,
> > + HAVE_RST_BAR, BIT(23), 22, 0x0548, 24, 0, 0, 0, 0x0548, 0,
> > 0, 0, 9),
> > + PLL(CLK_APMIXED_MAINPLL, "mainpll", 0x045C, 0x0468, 0xff000000,
> > + HAVE_RST_BAR, BIT(23), 22, 0x0460, 24, 0, 0, 0, 0x0460, 0,
> > 0, 0, 9),
> > + PLL(CLK_APMIXED_IMGPLL, "imgpll", 0x0554, 0x0560, 0,
> > + 0, 0, 22, 0x0558, 24, 0, 0, 0, 0x0558, 0, 0, 0, 9),
> > + PLL(CLK_APMIXED_UNIVPLL, "univpll", 0x0504, 0x0510, 0xff000000,
> > + HAVE_RST_BAR, BIT(23), 22, 0x0508, 24, 0, 0, 0, 0x0508, 0,
> > 0, 0, 9),
> > + PLL(CLK_APMIXED_ADSPPLL, "adsppll", 0x042C, 0x0438, 0,
> > + 0, 0, 22, 0x0430, 24, 0, 0, 0, 0x0430, 0, 0, 0, 9),
> > + PLL(CLK_APMIXED_APLL1, "apll1", 0x0304, 0x0314, 0,
> > + 0, 0, 32, 0x0308, 24, 0x0034, 0x0000, 12, 0x030C, 0, 0, 0,
> > 9),
> > + PLL(CLK_APMIXED_APLL2, "apll2", 0x0318, 0x0328, 0,
> > + 0, 0, 32, 0x031C, 24, 0x0038, 0x0000, 13, 0x0320, 0, 0, 0,
> > 9),
> > + PLL(CLK_APMIXED_APLL3, "apll3", 0x032C, 0x033C, 0,
> > + 0, 0, 32, 0x0330, 24, 0x003C, 0x0000, 14, 0x0334, 0, 0, 0,
> > 9),
> > + PLL(CLK_APMIXED_APLL4, "apll4", 0x0404, 0x0414, 0,
> > + 0, 0, 32, 0x0408, 24, 0x0040, 0x0000, 15, 0x040C, 0, 0, 0,
> > 9),
> > + PLL(CLK_APMIXED_APLL5, "apll5", 0x0418, 0x0428, 0,
> > + 0, 0, 32, 0x041C, 24, 0x0044, 0x0000, 16, 0x0420, 0, 0, 0,
> > 9),
> > + PLL(CLK_APMIXED_MFGPLL, "mfgpll", 0x0340, 0x034C, 0,
> > + 0, 0, 22, 0x0344, 24, 0, 0, 0, 0x0344, 0, 0, 0, 9),
> > +};
> > +
> > +static const struct of_device_id of_match_clk_mt8188_apmixed[] = {
> > + { .compatible = "mediatek,mt8188-apmixedsys", },
>
> You don't need the comma after compatible
>
> { .compatible = "mediatek,mt8188-apmixedsys" },
>
> > + {}
>
> At the end, please say what the last entry is; a common way to do
> this is:
>
> { /* sentinel */ }
>
> ...since that's a sentinel! :-)
> Ok.
> > +};
>
> You miss just one little step for module auto-loading here.
>
> MODULE_DEVICE_TABLE(of, of_match_clk_mt8188_apmixed);
Ok.
>
> > +
> > +static int clk_mt8188_apmixed_probe(struct platform_device *pdev)
> > +{
> > + struct clk_hw_onecell_data *clk_data;
> > + struct device_node *node = pdev->dev.of_node;
> > + int r;
> > +
> > + clk_data = mtk_alloc_clk_data(CLK_APMIXED_NR_CLK);
> > + if (!clk_data)
> > + return -ENOMEM;
> > +
> > + r = mtk_clk_register_plls(node, plls, ARRAY_SIZE(plls),
> > clk_data);
> > + if (r)
> > + goto free_apmixed_data;
> > +
> > + r = mtk_clk_register_gates(&pdev->dev, node, apmixed_clks,
> > + ARRAY_SIZE(apmixed_clks), clk_data);
> > + if (r)
> > + goto unregister_plls;
> > +
> > + r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get,
> > clk_data);
> > + if (r)
> > + goto unregister_gates;
> > +
> > + platform_set_drvdata(pdev, clk_data);
> > +
> > + return r;
>
> Reaching this point means that no error occurred, so here...
>
> return 0;
>
OK.
> > +
> > +unregister_gates:
> > + mtk_clk_unregister_gates(apmixed_clks,
> > ARRAY_SIZE(apmixed_clks), clk_data);
> > +unregister_plls:
> > + mtk_clk_unregister_plls(plls, ARRAY_SIZE(plls), clk_data);
> > +free_apmixed_data:
> > + mtk_free_clk_data(clk_data);
> > + return r;
> > +}
> > +
> > +static int clk_mt8188_apmixed_remove(struct platform_device *pdev)
> > +{
> > + struct device_node *node = pdev->dev.of_node;
> > + struct clk_hw_onecell_data *clk_data =
> > platform_get_drvdata(pdev);
> > +
> > + of_clk_del_provider(node);
> > + mtk_clk_unregister_gates(apmixed_clks,
> > ARRAY_SIZE(apmixed_clks), clk_data);
> > + mtk_clk_unregister_plls(plls, ARRAY_SIZE(plls), clk_data);
> > + mtk_free_clk_data(clk_data);
> > +
> > + return 0;
> > +}
> > +
> > +static struct platform_driver clk_mt8188_apmixed_drv = {
> > + .probe = clk_mt8188_apmixed_probe,
> > + .remove = clk_mt8188_apmixed_remove,
> > + .driver = {
> > + .name = "clk-mt8188-apmixed",
> > + .of_match_table = of_match_clk_mt8188_apmixed,
> > + },
> > +};
> > +builtin_platform_driver(clk_mt8188_apmixed_drv);
>
> You can change builtin_platform_driver() to module_platform_driver()
> here to
> achieve modularity.
OK.
>
> Regards,
> Angelo
>
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