hwrng: hisi-trng - Move hisi-trng into drivers/char/hw_random/

Since this file just implements a hwrng driver, move it into
drivers/char/hw_random/.  Rename the kconfig option accordingly as well.

Note that this moves the file back to its original location.

Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

4 files changed, 0 insertions, 108 deletions

diff --git a/drivers/crypto/hisilicon/Kconfig b/drivers/crypto/hisilicon/Kconfig
index 8aa23c939775..aeff08ccbadd 100644
--- a/drivers/crypto/hisilicon/Kconfig
+++ b/drivers/crypto/hisilicon/Kconfig
@@ -75,10 +75,3 @@ config CRYPTO_DEV_HISI_HPRE
 	help
 	  Support for HiSilicon HPRE(High Performance RSA Engine)
 	  accelerator, which can accelerate RSA and DH algorithms.
-
-config CRYPTO_DEV_HISI_TRNG
-	tristate "Support for HISI TRNG Driver"
-	depends on ARM64 && ACPI
-	select HW_RANDOM
-	help
-	  Support for HiSilicon TRNG Driver.
diff --git a/drivers/crypto/hisilicon/Makefile b/drivers/crypto/hisilicon/Makefile
index 8595a5a5d228..e1068ee9f973 100644
--- a/drivers/crypto/hisilicon/Makefile
+++ b/drivers/crypto/hisilicon/Makefile
@@ -5,4 +5,3 @@ obj-$(CONFIG_CRYPTO_DEV_HISI_SEC2) += sec2/
 obj-$(CONFIG_CRYPTO_DEV_HISI_QM) += hisi_qm.o
 hisi_qm-objs = qm.o sgl.o debugfs.o
 obj-$(CONFIG_CRYPTO_DEV_HISI_ZIP) += zip/
-obj-$(CONFIG_CRYPTO_DEV_HISI_TRNG) += trng/
diff --git a/drivers/crypto/hisilicon/trng/Makefile b/drivers/crypto/hisilicon/trng/Makefile
deleted file mode 100644
index d909079f351c..000000000000
--- a/drivers/crypto/hisilicon/trng/Makefile
+++ /dev/null
@@ -1,2 +0,0 @@
-obj-$(CONFIG_CRYPTO_DEV_HISI_TRNG) += hisi-trng-v2.o
-hisi-trng-v2-objs = trng.o
diff --git a/drivers/crypto/hisilicon/trng/trng.c b/drivers/crypto/hisilicon/trng/trng.c
deleted file mode 100644
index 6584ed051e09..000000000000
--- a/drivers/crypto/hisilicon/trng/trng.c
+++ /dev/null
@@ -1,98 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* Copyright (c) 2019 HiSilicon Limited. */
-
-#include <linux/acpi.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/platform_device.h>
-#include <linux/random.h>
-
-#define HISI_TRNG_REG		0x00F0
-#define HISI_TRNG_BYTES		4
-#define HISI_TRNG_QUALITY	512
-#define SLEEP_US		10
-#define TIMEOUT_US		10000
-
-struct hisi_trng {
-	void __iomem *base;
-	struct hwrng rng;
-};
-
-static int hisi_trng_read(struct hwrng *rng, void *buf, size_t max, bool wait)
-{
-	struct hisi_trng *trng;
-	int currsize = 0;
-	u32 val = 0;
-	int ret;
-
-	trng = container_of(rng, struct hisi_trng, rng);
-
-	do {
-		ret = readl_poll_timeout(trng->base + HISI_TRNG_REG, val,
-					 val, SLEEP_US, TIMEOUT_US);
-		if (ret)
-			return currsize;
-
-		if (max - currsize >= HISI_TRNG_BYTES) {
-			memcpy(buf + currsize, &val, HISI_TRNG_BYTES);
-			currsize += HISI_TRNG_BYTES;
-			if (currsize == max)
-				return currsize;
-			continue;
-		}
-
-		/* copy remaining bytes */
-		memcpy(buf + currsize, &val, max - currsize);
-		currsize = max;
-	} while (currsize < max);
-
-	return currsize;
-}
-
-static int hisi_trng_probe(struct platform_device *pdev)
-{
-	struct hisi_trng *trng;
-	int ret;
-
-	trng = devm_kzalloc(&pdev->dev, sizeof(*trng), GFP_KERNEL);
-	if (!trng)
-		return -ENOMEM;
-
-	trng->base = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(trng->base))
-		return PTR_ERR(trng->base);
-
-	trng->rng.name = pdev->name;
-	trng->rng.read = hisi_trng_read;
-	trng->rng.quality = HISI_TRNG_QUALITY;
-
-	ret = devm_hwrng_register(&pdev->dev, &trng->rng);
-	if (ret)
-		dev_err(&pdev->dev, "failed to register hwrng: %d!\n", ret);
-	return ret;
-}
-
-static const struct acpi_device_id hisi_trng_acpi_match[] = {
-	{ "HISI02B3", 0 },
-	{ }
-};
-MODULE_DEVICE_TABLE(acpi, hisi_trng_acpi_match);
-
-static struct platform_driver hisi_trng_driver = {
-	.probe		= hisi_trng_probe,
-	.driver		= {
-		.name	= "hisi-trng-v2",
-		.acpi_match_table = ACPI_PTR(hisi_trng_acpi_match),
-	},
-};
-
-module_platform_driver(hisi_trng_driver);
-
-MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR("Weili Qian <qianweili@huawei.com>");
-MODULE_AUTHOR("Zaibo Xu <xuzaibo@huawei.com>");
-MODULE_DESCRIPTION("HiSilicon true random number generator V2 driver");