drivers/clk/ti/interface.c

Source file repositories/reference/linux-study-clean/drivers/clk/ti/interface.c

File Facts

System
Linux kernel
Corpus path
drivers/clk/ti/interface.c
Extension
.c
Size
3875 bytes
Lines
143
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
/*
 * OMAP interface clock support
 *
 * Copyright (C) 2013 Texas Instruments, Inc.
 *
 * Tero Kristo <t-kristo@ti.com>
 */

#include <linux/clk-provider.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/clk/ti.h>
#include "clock.h"

#undef pr_fmt
#define pr_fmt(fmt) "%s: " fmt, __func__

static const struct clk_ops ti_interface_clk_ops = {
	.init		= &omap2_init_clk_clkdm,
	.enable		= &omap2_dflt_clk_enable,
	.disable	= &omap2_dflt_clk_disable,
	.is_enabled	= &omap2_dflt_clk_is_enabled,
};

static struct clk *_register_interface(struct device_node *node,
				       const char *name,
				       const char *parent_name,
				       struct clk_omap_reg *reg, u8 bit_idx,
				       const struct clk_hw_omap_ops *ops)
{
	struct clk_init_data init = { NULL };
	struct clk_hw_omap *clk_hw;
	struct clk *clk;

	clk_hw = kzalloc_obj(*clk_hw);
	if (!clk_hw)
		return ERR_PTR(-ENOMEM);

	clk_hw->hw.init = &init;
	clk_hw->ops = ops;
	memcpy(&clk_hw->enable_reg, reg, sizeof(*reg));
	clk_hw->enable_bit = bit_idx;

	init.name = name;
	init.ops = &ti_interface_clk_ops;
	init.flags = 0;

	init.num_parents = 1;
	init.parent_names = &parent_name;

	clk = of_ti_clk_register_omap_hw(node, &clk_hw->hw, name);

	if (IS_ERR(clk))
		kfree(clk_hw);

	return clk;
}

static void __init _of_ti_interface_clk_setup(struct device_node *node,
					      const struct clk_hw_omap_ops *ops)
{
	struct clk *clk;
	const char *parent_name;
	struct clk_omap_reg reg;
	u8 enable_bit = 0;
	const char *name;

	if (ti_clk_get_reg_addr(node, 0, &reg))
		return;

	enable_bit = reg.bit;

	parent_name = of_clk_get_parent_name(node, 0);
	if (!parent_name) {
		pr_err("%pOFn must have a parent\n", node);
		return;
	}

	name = ti_dt_clk_name(node);
	clk = _register_interface(node, name, parent_name, &reg,
				  enable_bit, ops);

	if (!IS_ERR(clk))
		of_clk_add_provider(node, of_clk_src_simple_get, clk);
}

static void __init of_ti_interface_clk_setup(struct device_node *node)
{

Annotation

Implementation Notes