drivers/clk/mediatek/clk-mt8135-apmixedsys.c

Source file repositories/reference/linux-study-clean/drivers/clk/mediatek/clk-mt8135-apmixedsys.c

File Facts

System
Linux kernel
Corpus path
drivers/clk/mediatek/clk-mt8135-apmixedsys.c
Extension
.c
Size
3569 bytes
Lines
107
Domain
Driver Families
Bucket
drivers/clk
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2014 MediaTek Inc.
 *               James Liao <jamesjj.liao@mediatek.com>
 * Copyright (c) 2023 Collabora, Ltd.
 *               AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
 */

#include <dt-bindings/clock/mt8135-clk.h>
#include <linux/clk.h>
#include <linux/of.h>
#include <linux/platform_device.h>

#include "clk-mtk.h"
#include "clk-pll.h"

#define MT8135_PLL_FMAX		(2000 * MHZ)
#define CON0_MT8135_RST_BAR	BIT(27)

#define PLL(_id, _name, _reg, _pwr_reg, _en_mask, _flags, _pcwbits, _pd_reg, _pd_shift, _tuner_reg, _pcw_reg, _pcw_shift) { \
		.id = _id,						\
		.name = _name,						\
		.reg = _reg,						\
		.pwr_reg = _pwr_reg,					\
		.en_mask = _en_mask,					\
		.flags = _flags,					\
		.rst_bar_mask = CON0_MT8135_RST_BAR,			\
		.fmax = MT8135_PLL_FMAX,				\
		.pcwbits = _pcwbits,					\
		.pd_reg = _pd_reg,					\
		.pd_shift = _pd_shift,					\
		.tuner_reg = _tuner_reg,				\
		.pcw_reg = _pcw_reg,					\
		.pcw_shift = _pcw_shift,				\
	}

static const struct mtk_pll_data plls[] = {
	PLL(CLK_APMIXED_ARMPLL1, "armpll1", 0x200, 0x218, 0x80000000, 0, 21, 0x204, 24, 0x0, 0x204, 0),
	PLL(CLK_APMIXED_ARMPLL2, "armpll2", 0x2cc, 0x2e4, 0x80000000, 0, 21, 0x2d0, 24, 0x0, 0x2d0, 0),
	PLL(CLK_APMIXED_MAINPLL, "mainpll", 0x21c, 0x234, 0xf0000000, HAVE_RST_BAR, 21, 0x21c, 6, 0x0, 0x220, 0),
	PLL(CLK_APMIXED_UNIVPLL, "univpll", 0x238, 0x250, 0xf3000000, HAVE_RST_BAR, 7, 0x238, 6, 0x0, 0x238, 9),
	PLL(CLK_APMIXED_MMPLL, "mmpll", 0x254, 0x26c, 0xf0000000, HAVE_RST_BAR, 21, 0x254, 6, 0x0, 0x258, 0),
	PLL(CLK_APMIXED_MSDCPLL, "msdcpll", 0x278, 0x290, 0x80000000, 0, 21, 0x278, 6, 0x0, 0x27c, 0),
	PLL(CLK_APMIXED_TVDPLL, "tvdpll", 0x294, 0x2ac, 0x80000000, 0, 31, 0x294, 6, 0x0, 0x298, 0),
	PLL(CLK_APMIXED_LVDSPLL, "lvdspll", 0x2b0, 0x2c8, 0x80000000, 0, 21, 0x2b0, 6, 0x0, 0x2b4, 0),
	PLL(CLK_APMIXED_AUDPLL, "audpll", 0x2e8, 0x300, 0x80000000, 0, 31, 0x2e8, 6, 0x2f8, 0x2ec, 0),
	PLL(CLK_APMIXED_VDECPLL, "vdecpll", 0x304, 0x31c, 0x80000000, 0, 21, 0x2b0, 6, 0x0, 0x308, 0),
};

static int clk_mt8135_apmixed_probe(struct platform_device *pdev)
{
	struct clk_hw_onecell_data *clk_data;
	struct device_node *node = pdev->dev.of_node;
	int ret;

	clk_data = mtk_alloc_clk_data(CLK_APMIXED_NR_CLK);
	if (!clk_data)
		return -ENOMEM;

	ret = mtk_clk_register_plls(&pdev->dev, plls, ARRAY_SIZE(plls),
				    clk_data);
	if (ret)
		goto free_clk_data;

	ret = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
	if (ret)
		goto unregister_plls;

	return 0;

unregister_plls:
	mtk_clk_unregister_plls(plls, ARRAY_SIZE(plls), clk_data);
free_clk_data:
	mtk_free_clk_data(clk_data);

	return ret;
}

static void clk_mt8135_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_plls(plls, ARRAY_SIZE(plls), clk_data);
	mtk_free_clk_data(clk_data);
}

static const struct of_device_id of_match_clk_mt8135_apmixed[] = {
	{ .compatible = "mediatek,mt8135-apmixedsys" },

Annotation

Implementation Notes