linux/drivers/clk/clk-lan966x.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Microchip LAN966x SoC Clock driver.
 *
 * Copyright (C) 2021 Microchip Technology, Inc. and its subsidiaries
 *
 * Author: Kavyasree Kotagiri <[email protected]>
 */

#include <linux/bitfield.h>
#include <linux/clk-provider.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

#include <dt-bindings/clock/microchip,lan966x.h>

#define GCK_ENA …
#define GCK_SRC_SEL …
#define GCK_PRESCALER …

#define DIV_MAX …

static const char *clk_names[N_CLOCKS] = …;

struct lan966x_gck { … };
#define to_lan966x_gck(hw) …

static const struct clk_parent_data lan966x_gck_pdata[] = …;

static struct clk_init_data init = …;

struct clk_gate_soc_desc { … };

static const struct clk_gate_soc_desc clk_gate_desc[] = …;

static DEFINE_SPINLOCK(clk_gate_lock);
static void __iomem *base;

static int lan966x_gck_enable(struct clk_hw *hw)
{ … }

static void lan966x_gck_disable(struct clk_hw *hw)
{ … }

static int lan966x_gck_set_rate(struct clk_hw *hw,
				unsigned long rate,
				unsigned long parent_rate)
{ … }

static unsigned long lan966x_gck_recalc_rate(struct clk_hw *hw,
					     unsigned long parent_rate)
{ … }

static int lan966x_gck_determine_rate(struct clk_hw *hw,
				      struct clk_rate_request *req)
{ … }

static u8 lan966x_gck_get_parent(struct clk_hw *hw)
{ … }

static int lan966x_gck_set_parent(struct clk_hw *hw, u8 index)
{ … }

static const struct clk_ops lan966x_gck_ops = …;

static struct clk_hw *lan966x_gck_clk_register(struct device *dev, int i)
{
	struct lan966x_gck *priv;
	int ret;

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return ERR_PTR(-ENOMEM);

	priv->reg = base + (i * 4);
	priv->hw.init = &init;
	ret = devm_clk_hw_register(dev, &priv->hw);
	if (ret)
		return ERR_PTR(ret);

	return &priv->hw;
};

static int lan966x_gate_clk_register(struct device *dev,
				     struct clk_hw_onecell_data *hw_data,
				     void __iomem *gate_base)
{ … }

static int lan966x_clk_probe(struct platform_device *pdev)
{ … }

static const struct of_device_id lan966x_clk_dt_ids[] = …;
MODULE_DEVICE_TABLE(of, lan966x_clk_dt_ids);

static struct platform_driver lan966x_clk_driver = …;
module_platform_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;