1 files changed, 0 insertions, 168 deletions
diff --git a/target/linux/mediatek/files/drivers/char/hw_random/mtk-rng.c b/target/linux/mediatek/files/drivers/char/hw_random/mtk-rng.c
deleted file mode 100644
index df8eb54fd5..0000000000
--- a/target/linux/mediatek/files/drivers/char/hw_random/mtk-rng.c
+++ /dev/null
@@ -1,168 +0,0 @@
-/*
- * Driver for Mediatek Hardware Random Number Generator
- *
- * Copyright (C) 2017 Sean Wang <sean.wang@mediatek.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-#define MTK_RNG_DEV KBUILD_MODNAME
-
-#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>
-
-#define USEC_POLL			2
-#define TIMEOUT_POLL			20
-
-#define RNG_CTRL			0x00
-#define RNG_EN				BIT(0)
-#define RNG_READY			BIT(31)
-
-#define RNG_DATA			0x08
-
-#define to_mtk_rng(p)	container_of(p, struct mtk_rng, rng)
-
-struct mtk_rng {
-	void __iomem *base;
-	struct clk *clk;
-	struct hwrng rng;
-};
-
-static int mtk_rng_init(struct hwrng *rng)
-{
-	struct mtk_rng *priv = to_mtk_rng(rng);
-	u32 val;
-	int err;
-
-	err = clk_prepare_enable(priv->clk);
-	if (err)
-		return err;
-
-	val = readl(priv->base + RNG_CTRL);
-	val |= RNG_EN;
-	writel(val, priv->base + RNG_CTRL);
-
-	return 0;
-}
-
-static void mtk_rng_cleanup(struct hwrng *rng)
-{
-	struct mtk_rng *priv = to_mtk_rng(rng);
-	u32 val;
-
-	val = readl(priv->base + RNG_CTRL);
-	val &= ~RNG_EN;
-	writel(val, priv->base + RNG_CTRL);
-
-	clk_disable_unprepare(priv->clk);
-}
-
-static bool mtk_rng_wait_ready(struct hwrng *rng, bool wait)
-{
-	struct mtk_rng *priv = to_mtk_rng(rng);
-	int ready;
-
-	ready = readl(priv->base + RNG_CTRL) & RNG_READY;
-	if (!ready && wait)
-		readl_poll_timeout_atomic(priv->base + RNG_CTRL, ready,
-					  ready & RNG_READY, USEC_POLL,
-					  TIMEOUT_POLL);
-	return !!ready;
-}
-
-static int mtk_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait)
-{
-	struct mtk_rng *priv = to_mtk_rng(rng);
-	int retval = 0;
-
-	while (max >= sizeof(u32)) {
-		if (!mtk_rng_wait_ready(rng, wait))
-			break;
-
-		*(u32 *)buf = readl(priv->base + RNG_DATA);
-		retval += sizeof(u32);
-		buf += sizeof(u32);
-		max -= sizeof(u32);
-	}
-
-	return retval || !wait ? retval : -EIO;
-}
-
-static int mtk_rng_probe(struct platform_device *pdev)
-{
-	struct resource *res;
-	int ret;
-	struct mtk_rng *priv;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "no iomem resource\n");
-		return -ENXIO;
-	}
-
-	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
-	if (!priv)
-		return -ENOMEM;
-
-	priv->rng.name = pdev->name;
-	priv->rng.init = mtk_rng_init;
-	priv->rng.cleanup = mtk_rng_cleanup;
-	priv->rng.read = mtk_rng_read;
-
-	priv->clk = devm_clk_get(&pdev->dev, "rng");
-	if (IS_ERR(priv->clk)) {
-		ret = PTR_ERR(priv->clk);
-		dev_err(&pdev->dev, "no clock for device: %d\n", ret);
-		return ret;
-	}
-
-	priv->base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(priv->base))
-		return PTR_ERR(priv->base);
-
-	ret = devm_hwrng_register(&pdev->dev, &priv->rng);
-	if (ret) {
-		dev_err(&pdev->dev, "failed to register rng device: %d\n",
-			ret);
-		return ret;
-	}
-
-	dev_info(&pdev->dev, "registered RNG driver\n");
-
-	return 0;
-}
-
-static const struct of_device_id mtk_rng_match[] = {
-	{ .compatible = "mediatek,mt7623-rng" },
-	{},
-};
-MODULE_DEVICE_TABLE(of, mtk_rng_match);
-
-static struct platform_driver mtk_rng_driver = {
-	.probe          = mtk_rng_probe,
-	.driver = {
-		.name = MTK_RNG_DEV,
-		.of_match_table = mtk_rng_match,
-	},
-};
-
-module_platform_driver(mtk_rng_driver);
-
-MODULE_DESCRIPTION("Mediatek Random Number Generator Driver");
-MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
-MODULE_LICENSE("GPL");