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From: Jerome Brunet <jbrunet@baylibre.com>
To: Jian Hu <jian.hu@amlogic.com>, Neil Armstrong <narmstrong@baylibre.com>
Cc: Rob Herring <robh@kernel.org>,
	Victor Wan <victor.wan@amlogic.com>,
	Jianxin Pan <jianxin.pan@amlogic.com>,
	Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
	Kevin Hilman <khilman@baylibre.com>,
	Michael Turquette <mturquette@baylibre.com>,
	linux-kernel@vger.kernel.org, Stephen Boyd <sboyd@kernel.org>,
	Qiufang Dai <qiufang.dai@amlogic.com>,
	Chandle Zou <chandle.zou@amlogic.com>,
	linux-amlogic@lists.infradead.org, linux-clk@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v7 3/5] clk: meson: a1: add support for Amlogic A1 PLL clock driver
Date: Tue, 04 Feb 2020 14:13:46 +0100
Message-ID: <1jeeva7awl.fsf@starbuckisacylon.baylibre.com> (raw)
In-Reply-To: <20200120034937.128600-4-jian.hu@amlogic.com>


On Mon 20 Jan 2020 at 04:49, Jian Hu <jian.hu@amlogic.com> wrote:

> The Amlogic A1 clock includes three drivers:
> pll clocks, peripheral clocks, CPU clocks.
> sys pll and CPU clocks will be sent in next patch.
>
> Unlike the previous series, there is no EE/AO domain
> in A1 CLK controllers.
>
> Signed-off-by: Jian Hu <jian.hu@amlogic.com>
> ---
>  drivers/clk/meson/Kconfig  |   9 +
>  drivers/clk/meson/Makefile |   1 +
>  drivers/clk/meson/a1-pll.c | 360 +++++++++++++++++++++++++++++++++++++
>  drivers/clk/meson/a1-pll.h |  56 ++++++
>  4 files changed, 426 insertions(+)
>  create mode 100644 drivers/clk/meson/a1-pll.c
>  create mode 100644 drivers/clk/meson/a1-pll.h
>
> diff --git a/drivers/clk/meson/Kconfig b/drivers/clk/meson/Kconfig
> index dabeb435d067..31613c3bbbc7 100644
> --- a/drivers/clk/meson/Kconfig
> +++ b/drivers/clk/meson/Kconfig
> @@ -93,6 +93,15 @@ config COMMON_CLK_AXG_AUDIO
>  	  Support for the audio clock controller on AmLogic A113D devices,
>  	  aka axg, Say Y if you want audio subsystem to work.
>  
> +config COMMON_CLK_A1_PLL
> +	bool
> +	depends on ARCH_MESON
> +	select COMMON_CLK_MESON_REGMAP
> +	select COMMON_CLK_MESON_PLL
> +	help
> +	  Support for the PLL clock controller on Amlogic A113L device,
> +	  aka a1. Say Y if you want PLL to work.
> +
>  config COMMON_CLK_G12A
>  	bool
>  	depends on ARCH_MESON
> diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile
> index 3939f218587a..71d3b8e6fb8a 100644
> --- a/drivers/clk/meson/Makefile
> +++ b/drivers/clk/meson/Makefile
> @@ -16,6 +16,7 @@ obj-$(CONFIG_COMMON_CLK_MESON_VID_PLL_DIV) += vid-pll-div.o
>  
>  obj-$(CONFIG_COMMON_CLK_AXG) += axg.o axg-aoclk.o
>  obj-$(CONFIG_COMMON_CLK_AXG_AUDIO) += axg-audio.o
> +obj-$(CONFIG_COMMON_CLK_A1_PLL) += a1-pll.o
>  obj-$(CONFIG_COMMON_CLK_GXBB) += gxbb.o gxbb-aoclk.o
>  obj-$(CONFIG_COMMON_CLK_G12A) += g12a.o g12a-aoclk.o
>  obj-$(CONFIG_COMMON_CLK_MESON8B) += meson8b.o
> diff --git a/drivers/clk/meson/a1-pll.c b/drivers/clk/meson/a1-pll.c
> new file mode 100644
> index 000000000000..69c1ca07d041
> --- /dev/null
> +++ b/drivers/clk/meson/a1-pll.c
> @@ -0,0 +1,360 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2019 Amlogic, Inc. All rights reserved.
> + * Author: Jian Hu <jian.hu@amlogic.com>
> + */
> +
> +#include <linux/clk-provider.h>
> +#include <linux/of_device.h>
> +#include <linux/platform_device.h>
> +#include "a1-pll.h"
> +#include "clk-pll.h"
> +#include "clk-regmap.h"
> +
> +static struct clk_regmap a1_fixed_pll_dco = {
> +	.data = &(struct meson_clk_pll_data){
> +		.en = {
> +			.reg_off = ANACTRL_FIXPLL_CTRL0,
> +			.shift   = 28,
> +			.width   = 1,
> +		},
> +		.m = {
> +			.reg_off = ANACTRL_FIXPLL_CTRL0,
> +			.shift   = 0,
> +			.width   = 8,
> +		},
> +		.n = {
> +			.reg_off = ANACTRL_FIXPLL_CTRL0,
> +			.shift   = 10,
> +			.width   = 5,
> +		},
> +		.frac = {
> +			.reg_off = ANACTRL_FIXPLL_CTRL1,
> +			.shift   = 0,
> +			.width   = 19,
> +		},
> +		.l = {
> +			.reg_off = ANACTRL_FIXPLL_STS,
> +			.shift   = 31,
> +			.width   = 1,
> +		},
> +		.rst = {
> +			.reg_off = ANACTRL_FIXPLL_CTRL0,
> +			.shift   = 29,
> +			.width   = 1,
> +		},
> +	},
> +	.hw.init = &(struct clk_init_data){
> +		.name = "fixed_pll_dco",
> +		.ops = &meson_clk_pll_ro_ops,
> +		.parent_data = &(const struct clk_parent_data) {
> +			.fw_name = "xtal_fixpll",
> +		},
> +		.num_parents = 1,
> +	},
> +};
> +
> +static struct clk_regmap a1_fixed_pll = {
> +	.data = &(struct clk_regmap_gate_data){
> +		.offset = ANACTRL_FIXPLL_CTRL0,
> +		.bit_idx = 20,
> +	},
> +	.hw.init = &(struct clk_init_data) {
> +		.name = "fixed_pll",
> +		.ops = &clk_regmap_gate_ops,
> +		.parent_hws = (const struct clk_hw *[]) {
> +			&a1_fixed_pll_dco.hw
> +		},
> +		.num_parents = 1,
> +		/*
> +		 * It is enough that the fdiv leaf has critical flag,
> +		 * No critical or unused flag here.
> +		 */
> +	},
> +};
> +
> +static const struct pll_mult_range a1_hifi_pll_mult_range = {
> +	.min = 32,
> +	.max = 64,
> +};
> +
> +static const struct reg_sequence a1_hifi_init_regs[] = {
> +	{ .reg = ANACTRL_HIFIPLL_CTRL1, .def = 0x01800000 },
> +	{ .reg = ANACTRL_HIFIPLL_CTRL2, .def = 0x00001100 },
> +	{ .reg = ANACTRL_HIFIPLL_CTRL3, .def = 0x100a1100 },
> +	{ .reg = ANACTRL_HIFIPLL_CTRL4, .def = 0x00302000 },
> +	{ .reg = ANACTRL_HIFIPLL_CTRL0, .def = 0x01f18440 },
> +};
> +
> +static struct clk_regmap a1_hifi_pll = {
> +	.data = &(struct meson_clk_pll_data){
> +		.en = {
> +			.reg_off = ANACTRL_HIFIPLL_CTRL0,
> +			.shift   = 28,
> +			.width   = 1,
> +		},
> +		.m = {
> +			.reg_off = ANACTRL_HIFIPLL_CTRL0,
> +			.shift   = 0,
> +			.width   = 8,
> +		},
> +		.n = {
> +			.reg_off = ANACTRL_HIFIPLL_CTRL0,
> +			.shift   = 10,
> +			.width   = 5,
> +		},
> +		.frac = {
> +			.reg_off = ANACTRL_HIFIPLL_CTRL1,
> +			.shift   = 0,
> +			.width   = 19,
> +		},
> +		.l = {
> +			.reg_off = ANACTRL_HIFIPLL_STS,
> +			.shift   = 31,
> +			.width   = 1,
> +		},
> +		.current_en = {
> +			.reg_off = ANACTRL_HIFIPLL_CTRL0,
> +			.shift   = 26,
> +			.width   = 1,
> +		},
> +		.l_detect = {
> +			.reg_off = ANACTRL_HIFIPLL_CTRL2,
> +			.shift   = 6,
> +			.width   = 1,
> +		},
> +		.range = &a1_hifi_pll_mult_range,
> +		.init_regs = a1_hifi_init_regs,
> +		.init_count = ARRAY_SIZE(a1_hifi_init_regs),
> +	},
> +	.hw.init = &(struct clk_init_data){
> +		.name = "hifi_pll",
> +		.ops = &meson_clk_pll_ops,
> +		.parent_data = &(const struct clk_parent_data) {
> +			.fw_name = "xtal_hifipll",
> +		},
> +		.num_parents = 1,
> +	},
> +};
> +
> +static struct clk_fixed_factor a1_fclk_div2_div = {
> +	.mult = 1,
> +	.div = 2,
> +	.hw.init = &(struct clk_init_data){
> +		.name = "fclk_div2_div",
> +		.ops = &clk_fixed_factor_ops,
> +		.parent_hws = (const struct clk_hw *[]) {
> +			&a1_fixed_pll.hw
> +		},
> +		.num_parents = 1,
> +	},
> +};
> +
> +static struct clk_regmap a1_fclk_div2 = {
> +	.data = &(struct clk_regmap_gate_data){
> +		.offset = ANACTRL_FIXPLL_CTRL0,
> +		.bit_idx = 21,
> +	},
> +	.hw.init = &(struct clk_init_data){
> +		.name = "fclk_div2",
> +		.ops = &clk_regmap_gate_ops,
> +		.parent_hws = (const struct clk_hw *[]) {
> +			&a1_fclk_div2_div.hw
> +		},
> +		.num_parents = 1,
> +		/*
> +		 * This clock is used by DDR clock in BL2 firmware
> +		 * and is required by the platform to operate correctly.
> +		 * Until the following condition are met, we need this clock to
> +		 * be marked as critical:
> +		 * a) Mark the clock used by a firmware resource, if possible
> +		 * b) CCF has a clock hand-off mechanism to make the sure the
> +		 *    clock stays on until the proper driver comes along
> +		 */
> +		.flags = CLK_IS_CRITICAL,
> +	},
> +};
> +
> +static struct clk_fixed_factor a1_fclk_div3_div = {
> +	.mult = 1,
> +	.div = 3,
> +	.hw.init = &(struct clk_init_data){
> +		.name = "fclk_div3_div",
> +		.ops = &clk_fixed_factor_ops,
> +		.parent_hws = (const struct clk_hw *[]) {
> +			&a1_fixed_pll.hw
> +		},
> +		.num_parents = 1,
> +	},
> +};
> +
> +static struct clk_regmap a1_fclk_div3 = {
> +	.data = &(struct clk_regmap_gate_data){
> +		.offset = ANACTRL_FIXPLL_CTRL0,
> +		.bit_idx = 22,
> +	},
> +	.hw.init = &(struct clk_init_data){
> +		.name = "fclk_div3",
> +		.ops = &clk_regmap_gate_ops,
> +		.parent_hws = (const struct clk_hw *[]) {
> +			&a1_fclk_div3_div.hw
> +		},
> +		.num_parents = 1,
> +		/*
> +		 * This clock is used by APB bus which is set in boot ROM code
> +		 * and is required by the platform to operate correctly.
> +		 * About critical, refer to a1_fclk_div2.
> +		 */
> +		.flags = CLK_IS_CRITICAL,
> +	},
> +};
> +
> +static struct clk_fixed_factor a1_fclk_div5_div = {
> +	.mult = 1,
> +	.div = 5,
> +	.hw.init = &(struct clk_init_data){
> +		.name = "fclk_div5_div",
> +		.ops = &clk_fixed_factor_ops,
> +		.parent_hws = (const struct clk_hw *[]) {
> +			&a1_fixed_pll.hw
> +		},
> +		.num_parents = 1,
> +	},
> +};
> +
> +static struct clk_regmap a1_fclk_div5 = {
> +	.data = &(struct clk_regmap_gate_data){
> +		.offset = ANACTRL_FIXPLL_CTRL0,
> +		.bit_idx = 23,
> +	},
> +	.hw.init = &(struct clk_init_data){
> +		.name = "fclk_div5",
> +		.ops = &clk_regmap_gate_ops,
> +		.parent_hws = (const struct clk_hw *[]) {
> +			&a1_fclk_div5_div.hw
> +		},
> +		.num_parents = 1,
> +		/*
> +		 * This clock is used by AXI bus which setted in Romcode
> +		 * and is required by the platform to operate correctly.
> +		 * About critical, refer to a1_fclk_div2.
> +		 */
> +		.flags = CLK_IS_CRITICAL,
> +	},
> +};
> +
> +static struct clk_fixed_factor a1_fclk_div7_div = {
> +	.mult = 1,
> +	.div = 7,
> +	.hw.init = &(struct clk_init_data){
> +		.name = "fclk_div7_div",
> +		.ops = &clk_fixed_factor_ops,
> +		.parent_hws = (const struct clk_hw *[]) {
> +			&a1_fixed_pll.hw
> +		},
> +		.num_parents = 1,
> +	},
> +};
> +
> +static struct clk_regmap a1_fclk_div7 = {
> +	.data = &(struct clk_regmap_gate_data){
> +		.offset = ANACTRL_FIXPLL_CTRL0,
> +		.bit_idx = 24,
> +	},
> +	.hw.init = &(struct clk_init_data){
> +		.name = "fclk_div7",
> +		.ops = &clk_regmap_gate_ops,
> +		.parent_hws = (const struct clk_hw *[]) {
> +			&a1_fclk_div7_div.hw
> +		},
> +		.num_parents = 1,
> +	},
> +};
> +
> +/* Array of all clocks provided by this provider */
> +static struct clk_hw_onecell_data a1_pll_hw_onecell_data = {
> +	.hws = {
> +		[CLKID_FIXED_PLL_DCO]		= &a1_fixed_pll_dco.hw,
> +		[CLKID_FIXED_PLL]		= &a1_fixed_pll.hw,
> +		[CLKID_HIFI_PLL]		= &a1_hifi_pll.hw,
> +		[CLKID_FCLK_DIV2]		= &a1_fclk_div2.hw,
> +		[CLKID_FCLK_DIV3]		= &a1_fclk_div3.hw,
> +		[CLKID_FCLK_DIV5]		= &a1_fclk_div5.hw,
> +		[CLKID_FCLK_DIV7]		= &a1_fclk_div7.hw,
> +		[CLKID_FCLK_DIV2_DIV]		= &a1_fclk_div2_div.hw,
> +		[CLKID_FCLK_DIV3_DIV]		= &a1_fclk_div3_div.hw,
> +		[CLKID_FCLK_DIV5_DIV]		= &a1_fclk_div5_div.hw,
> +		[CLKID_FCLK_DIV7_DIV]		= &a1_fclk_div7_div.hw,
> +		[NR_PLL_CLKS]			= NULL,
> +	},
> +	.num = NR_PLL_CLKS,
> +};
> +
> +static struct clk_regmap *const a1_pll_regmaps[] = {
> +	&a1_fixed_pll_dco,
> +	&a1_fixed_pll,
> +	&a1_hifi_pll,
> +	&a1_fclk_div2,
> +	&a1_fclk_div3,
> +	&a1_fclk_div5,
> +	&a1_fclk_div7,
> +};
> +
> +static struct regmap_config clkc_regmap_config = {
> +	.reg_bits       = 32,
> +	.val_bits       = 32,
> +	.reg_stride     = 4,
> +};
> +
> +static int meson_a1_pll_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct resource *res;
> +	void __iomem *base;
> +	struct regmap *map;
> +	int ret, i;
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +
> +	base = devm_ioremap_resource(dev, res);
> +	if (IS_ERR(base))
> +		return PTR_ERR(base);
> +
> +	map = devm_regmap_init_mmio(dev, base, &clkc_regmap_config);
> +	if (IS_ERR(map))
> +		return PTR_ERR(map);
> +
> +	/* Populate regmap for the regmap backed clocks */
> +	for (i = 0; i < ARRAY_SIZE(a1_pll_regmaps); i++)
> +		a1_pll_regmaps[i]->map = map;
> +
> +	for (i = 0; i < a1_pll_hw_onecell_data.num; i++) {
> +		/* array might be sparse */
> +		if (!a1_pll_hw_onecell_data.hws[i])
> +			continue;
> +
> +		ret = devm_clk_hw_register(dev, a1_pll_hw_onecell_data.hws[i]);
> +		if (ret) {
> +			dev_err(dev, "Clock registration failed\n");
> +			return ret;
> +		}
> +	}
> +
> +	return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
> +					   &a1_pll_hw_onecell_data);
> +}
> +
> +static const struct of_device_id clkc_match_table[] = {
> +	{ .compatible = "amlogic,a1-pll-clkc", },
> +	{}
> +};
> +
> +static struct platform_driver a1_pll_driver = {
> +	.probe		= meson_a1_pll_probe,
> +	.driver		= {
> +		.name	= "a1-pll-clkc",
> +		.of_match_table = clkc_match_table,
> +	},
> +};
> +
> +builtin_platform_driver(a1_pll_driver);
> diff --git a/drivers/clk/meson/a1-pll.h b/drivers/clk/meson/a1-pll.h
> new file mode 100644
> index 000000000000..8ded267061ad
> --- /dev/null
> +++ b/drivers/clk/meson/a1-pll.h
> @@ -0,0 +1,56 @@
> +/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
> +/*
> + * Copyright (c) 2019 Amlogic, Inc. All rights reserved.
> + */
> +
> +#ifndef __A1_PLL_H
> +#define __A1_PLL_H
> +
> +/* PLL register offset */
> +#define ANACTRL_FIXPLL_CTRL0		0x0
> +#define ANACTRL_FIXPLL_CTRL1		0x4
> +#define ANACTRL_FIXPLL_CTRL2		0x8
> +#define ANACTRL_FIXPLL_CTRL3		0xc
> +#define ANACTRL_FIXPLL_CTRL4		0x10
> +#define ANACTRL_FIXPLL_STS		0x14
> +#define ANACTRL_SYSPLL_CTRL0		0x80
> +#define ANACTRL_SYSPLL_CTRL1		0x84
> +#define ANACTRL_SYSPLL_CTRL2		0x88
> +#define ANACTRL_SYSPLL_CTRL3		0x8c
> +#define ANACTRL_SYSPLL_CTRL4		0x90
> +#define ANACTRL_SYSPLL_STS		0x94
> +#define ANACTRL_HIFIPLL_CTRL0		0xc0
> +#define ANACTRL_HIFIPLL_CTRL1		0xc4
> +#define ANACTRL_HIFIPLL_CTRL2		0xc8
> +#define ANACTRL_HIFIPLL_CTRL3		0xcc
> +#define ANACTRL_HIFIPLL_CTRL4		0xd0
> +#define ANACTRL_HIFIPLL_STS		0xd4

Non of the definition below are used.
What are they ? Do you need them ?

> +#define ANACTRL_AUDDDS_CTRL0		0x100
> +#define ANACTRL_AUDDDS_CTRL1		0x104
> +#define ANACTRL_AUDDDS_CTRL2		0x108
> +#define ANACTRL_AUDDDS_CTRL3		0x10c
> +#define ANACTRL_AUDDDS_CTRL4		0x110
> +#define ANACTRL_AUDDDS_STS		0x114
> +#define ANACTRL_MISCTOP_CTRL0		0x140
> +#define ANACTRL_POR_CNTL		0x188
> +
> +/*
> + * CLKID index values
> + *
> + * These indices are entirely contrived and do not map onto the hardware.
> + * It has now been decided to expose everything by default in the DT header:
> + * include/dt-bindings/clock/a1-pll-clkc.h. Only the clocks ids we don't want
> + * to expose, such as the internal muxes and dividers of composite clocks,
> + * will remain defined here.
> + */
> +#define CLKID_FIXED_PLL_DCO		0
> +#define CLKID_FCLK_DIV2_DIV		2
> +#define CLKID_FCLK_DIV3_DIV		3
> +#define CLKID_FCLK_DIV5_DIV		4
> +#define CLKID_FCLK_DIV7_DIV		5
> +#define NR_PLL_CLKS			11
> +
> +/* include the CLKIDs that have been made part of the DT binding */
> +#include <dt-bindings/clock/a1-pll-clkc.h>
> +
> +#endif /* __A1_PLL_H */


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  reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-20  3:49 [PATCH v7 0/5] add Amlogic A1 clock controller driver Jian Hu
2020-01-20  3:49 ` [PATCH v7 1/5] dt-bindings: clock: meson: add A1 PLL clock controller bindings Jian Hu
2020-01-21 22:00   ` Rob Herring
2020-02-04  3:12     ` Jian Hu
2020-01-20  3:49 ` [PATCH v7 2/5] clk: meson: add support for A1 PLL clock ops Jian Hu
2020-02-04 10:24   ` Jerome Brunet
2020-02-10  6:11     ` Jian Hu
2020-02-18  9:05       ` Jerome Brunet
2020-01-20  3:49 ` [PATCH v7 3/5] clk: meson: a1: add support for Amlogic A1 PLL clock driver Jian Hu
2020-02-04 13:13   ` Jerome Brunet [this message]
2020-02-10  6:16     ` Jian Hu
2020-01-20  3:49 ` [PATCH v7 4/5] dt-bindings: clock: meson: add A1 peripheral clock controller bindings Jian Hu
2020-01-29  5:44   ` Stephen Boyd
2020-01-20  3:49 ` [PATCH v7 5/5] clk: meson: a1: add support for Amlogic A1 Peripheral clock driver Jian Hu

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