linux/drivers/char/hw_random/mtk-rng.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Driver for Mediatek Hardware Random Number Generator
 *
 * Copyright (C) 2017 Sean Wang <[email protected]>
 */
#define MTK_RNG_DEV …

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/hw_random.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>

/* Runtime PM autosuspend timeout: */
#define RNG_AUTOSUSPEND_TIMEOUT …

#define USEC_POLL …
#define TIMEOUT_POLL …

#define RNG_CTRL …
#define RNG_EN …
#define RNG_READY …

#define RNG_DATA …

#define to_mtk_rng(p) …

struct mtk_rng { … };

static int mtk_rng_init(struct hwrng *rng)
{ … }

static void mtk_rng_cleanup(struct hwrng *rng)
{ … }

static bool mtk_rng_wait_ready(struct hwrng *rng, bool wait)
{ … }

static int mtk_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait)
{ … }

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

#ifdef CONFIG_PM
static int mtk_rng_runtime_suspend(struct device *dev)
{ … }

static int mtk_rng_runtime_resume(struct device *dev)
{ … }

static const struct dev_pm_ops mtk_rng_pm_ops = …;

#define MTK_RNG_PM_OPS …
#else	/* CONFIG_PM */
#define MTK_RNG_PM_OPS …
#endif	/* CONFIG_PM */

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

static struct platform_driver mtk_rng_driver = …;

module_platform_driver(…) …;

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