drivers/clk/visconti/pll-tmpv770x.c

Source file repositories/reference/linux-study-clean/drivers/clk/visconti/pll-tmpv770x.c

File Facts

System
Linux kernel
Corpus path
drivers/clk/visconti/pll-tmpv770x.c
Extension
.c
Size
3276 bytes
Lines
89
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
/*
 * Toshiba Visconti PLL controller
 *
 * Copyright (c) 2021 TOSHIBA CORPORATION
 * Copyright (c) 2021 Toshiba Electronic Devices & Storage Corporation
 *
 * Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
 */

#include <linux/clk-provider.h>
#include <linux/of_address.h>
#include <linux/slab.h>

#include <dt-bindings/clock/toshiba,tmpv770x.h>

#include "pll.h"

/* Must be equal to the last pll ID increased by one */
#define PLLS_NR	(TMPV770X_PLL_PIIMGERPLL + 1)

static DEFINE_SPINLOCK(tmpv770x_pll_lock);

static const struct visconti_pll_rate_table pipll0_rates[] __initconst = {
	VISCONTI_PLL_RATE(840000000, 0x1, 0x0, 0x1, 0x54, 0x000000, 0x2, 0x1),
	VISCONTI_PLL_RATE(780000000, 0x1, 0x0, 0x1, 0x4e, 0x000000, 0x2, 0x1),
	VISCONTI_PLL_RATE(600000000, 0x1, 0x0, 0x1, 0x3c, 0x000000, 0x2, 0x1),
	{ /* sentinel */ },
};

static const struct visconti_pll_rate_table piddrcpll_rates[] __initconst = {
	VISCONTI_PLL_RATE(780000000, 0x1, 0x0, 0x1, 0x4e, 0x000000, 0x2, 0x1),
	VISCONTI_PLL_RATE(760000000, 0x1, 0x0, 0x1, 0x4c, 0x000000, 0x2, 0x1),
	{ /* sentinel */ },
};

static const struct visconti_pll_rate_table pivoifpll_rates[] __initconst = {
	VISCONTI_PLL_RATE(165000000, 0x1, 0x0, 0x1, 0x42, 0x000000, 0x4, 0x2),
	VISCONTI_PLL_RATE(148500000, 0x1, 0x1, 0x1, 0x3b, 0x666666, 0x4, 0x2),
	VISCONTI_PLL_RATE(96000000, 0x1, 0x0, 0x1, 0x30, 0x000000, 0x5, 0x2),
	VISCONTI_PLL_RATE(74250000, 0x1, 0x1, 0x1, 0x3b, 0x666666, 0x4, 0x4),
	VISCONTI_PLL_RATE(54000000, 0x1, 0x0, 0x1, 0x36, 0x000000, 0x5, 0x4),
	VISCONTI_PLL_RATE(48000000, 0x1, 0x0, 0x1, 0x30, 0x000000, 0x5, 0x4),
	VISCONTI_PLL_RATE(35750000, 0x1, 0x1, 0x1, 0x32, 0x0ccccc, 0x7, 0x4),
	{ /* sentinel */ },
};

static const struct visconti_pll_rate_table piimgerpll_rates[] __initconst = {
	VISCONTI_PLL_RATE(165000000, 0x1, 0x0, 0x1, 0x42, 0x000000, 0x4, 0x2),
	VISCONTI_PLL_RATE(96000000, 0x1, 0x0, 0x1, 0x30, 0x000000, 0x5, 0x2),
	VISCONTI_PLL_RATE(54000000, 0x1, 0x0, 0x1, 0x36, 0x000000, 0x5, 0x4),
	VISCONTI_PLL_RATE(48000000, 0x1, 0x0, 0x1, 0x30, 0x000000, 0x5, 0x4),
	{ /* sentinel */ },
};

static const struct visconti_pll_info pll_info[] __initconst = {
	{ TMPV770X_PLL_PIPLL0, "pipll0", "osc2-clk", 0x0, pipll0_rates },
	{ TMPV770X_PLL_PIDDRCPLL, "piddrcpll", "osc2-clk", 0x500, piddrcpll_rates },
	{ TMPV770X_PLL_PIVOIFPLL, "pivoifpll", "osc2-clk", 0x600, pivoifpll_rates },
	{ TMPV770X_PLL_PIIMGERPLL, "piimgerpll", "osc2-clk", 0x700, piimgerpll_rates },
};

static void __init tmpv770x_setup_plls(struct device_node *np)
{
	struct visconti_pll_provider *ctx;
	void __iomem *reg_base;

	reg_base = of_iomap(np, 0);
	if (!reg_base)
		return;

	ctx = visconti_init_pll(np, reg_base, PLLS_NR);
	if (IS_ERR(ctx)) {
		iounmap(reg_base);
		return;
	}

	ctx->clk_data.hws[TMPV770X_PLL_PIPLL1] =
		clk_hw_register_fixed_rate(NULL, "pipll1", NULL, 0, 600000000);
	ctx->clk_data.hws[TMPV770X_PLL_PIDNNPLL] =
		clk_hw_register_fixed_rate(NULL, "pidnnpll", NULL, 0, 500000000);
	ctx->clk_data.hws[TMPV770X_PLL_PIETHERPLL] =
		clk_hw_register_fixed_rate(NULL, "pietherpll", NULL, 0, 500000000);

	visconti_register_plls(ctx, pll_info, ARRAY_SIZE(pll_info), &tmpv770x_pll_lock);
}

CLK_OF_DECLARE(tmpv770x_plls, "toshiba,tmpv7708-pipllct", tmpv770x_setup_plls);

Annotation

Implementation Notes