linux/drivers/clk/imx/clk-pfd.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright 2012 Freescale Semiconductor, Inc.
 * Copyright 2012 Linaro Ltd.
 */

#include <linux/clk-provider.h>
#include <linux/export.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/err.h>
#include "clk.h"

/**
 * struct clk_pfd - IMX PFD clock
 * @hw:		clock source
 * @reg:	PFD register address
 * @idx:	the index of PFD encoded in the register
 *
 * PFD clock found on i.MX6 series.  Each register for PFD has 4 clk_pfd
 * data encoded, and member idx is used to specify the one.  And each
 * register has SET, CLR and TOG registers at offset 0x4 0x8 and 0xc.
 */
struct clk_pfd { … };

#define to_clk_pfd(_hw) …

#define SET …
#define CLR …
#define OTG …

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

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

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

static long clk_pfd_round_rate(struct clk_hw *hw, unsigned long rate,
			       unsigned long *prate)
{ … }

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

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

static const struct clk_ops clk_pfd_ops = …;

struct clk_hw *imx_clk_hw_pfd(const char *name, const char *parent_name,
			void __iomem *reg, u8 idx)
{ … }
EXPORT_SYMBOL_GPL(…);