rng: stm32: rename STM32 RNG driver

Rename the RNG driver as it is usable by other STM32 platforms
than the STM32MP1x ones. Rename CONFIG_RNG_STM32MP1 to
CONFIG_RNG_STM32

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Grzegorz Szymaszek <gszymaszek@short.pl>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>

1 files changed, 0 insertions, 198 deletions

diff --git a/drivers/rng/stm32mp1_rng.c b/drivers/rng/stm32mp1_rng.c
deleted file mode 100644
index 89da78c6c8b..00000000000
--- a/drivers/rng/stm32mp1_rng.c
+++ /dev/null
@@ -1,198 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (c) 2019, Linaro Limited
- */
-
-#define LOG_CATEGORY UCLASS_RNG
-
-#include <common.h>
-#include <clk.h>
-#include <dm.h>
-#include <log.h>
-#include <reset.h>
-#include <rng.h>
-#include <linux/bitops.h>
-#include <linux/delay.h>
-
-#include <asm/io.h>
-#include <linux/iopoll.h>
-#include <linux/kernel.h>
-
-#define RNG_CR		0x00
-#define RNG_CR_RNGEN	BIT(2)
-#define RNG_CR_CED	BIT(5)
-#define RNG_CR_CONDRST	BIT(30)
-
-#define RNG_SR		0x04
-#define RNG_SR_SEIS	BIT(6)
-#define RNG_SR_CEIS	BIT(5)
-#define RNG_SR_SECS	BIT(2)
-#define RNG_SR_DRDY	BIT(0)
-
-#define RNG_DR		0x08
-
-struct stm32_rng_data {
-	bool has_cond_reset;
-};
-
-struct stm32_rng_plat {
-	fdt_addr_t base;
-	struct clk clk;
-	struct reset_ctl rst;
-	const struct stm32_rng_data *data;
-};
-
-static int stm32_rng_read(struct udevice *dev, void *data, size_t len)
-{
-	int retval, i;
-	u32 sr, count, reg;
-	size_t increment;
-	struct stm32_rng_plat *pdata = dev_get_plat(dev);
-
-	while (len > 0) {
-		retval = readl_poll_timeout(pdata->base + RNG_SR, sr,
-					    sr & RNG_SR_DRDY, 10000);
-		if (retval)
-			return retval;
-
-		if (sr & (RNG_SR_SEIS | RNG_SR_SECS)) {
-			/* As per SoC TRM */
-			clrbits_le32(pdata->base + RNG_SR, RNG_SR_SEIS);
-			for (i = 0; i < 12; i++)
-				readl(pdata->base + RNG_DR);
-			if (readl(pdata->base + RNG_SR) & RNG_SR_SEIS) {
-				log_err("RNG Noise");
-				return -EIO;
-			}
-			/* start again */
-			continue;
-		}
-
-		/*
-		 * Once the DRDY bit is set, the RNG_DR register can
-		 * be read four consecutive times.
-		 */
-		count = 4;
-		while (len && count) {
-			reg = readl(pdata->base + RNG_DR);
-			memcpy(data, &reg, min(len, sizeof(u32)));
-			increment = min(len, sizeof(u32));
-			data += increment;
-			len -= increment;
-			count--;
-		}
-	}
-
-	return 0;
-}
-
-static int stm32_rng_init(struct stm32_rng_plat *pdata)
-{
-	int err;
-	u32 cr, sr;
-
-	err = clk_enable(&pdata->clk);
-	if (err)
-		return err;
-
-	cr = readl(pdata->base + RNG_CR);
-
-	/* Disable CED */
-	cr |= RNG_CR_CED;
-	if (pdata->data->has_cond_reset) {
-		cr |= RNG_CR_CONDRST;
-		writel(cr, pdata->base + RNG_CR);
-		cr &= ~RNG_CR_CONDRST;
-		writel(cr, pdata->base + RNG_CR);
-		err = readl_poll_timeout(pdata->base + RNG_CR, cr,
-					 (!(cr & RNG_CR_CONDRST)), 10000);
-		if (err)
-			return err;
-	}
-
-	/* clear error indicators */
-	writel(0, pdata->base + RNG_SR);
-
-	cr |= RNG_CR_RNGEN;
-	writel(cr, pdata->base + RNG_CR);
-
-	err = readl_poll_timeout(pdata->base + RNG_SR, sr,
-				 sr & RNG_SR_DRDY, 10000);
-	return err;
-}
-
-static int stm32_rng_cleanup(struct stm32_rng_plat *pdata)
-{
-	writel(0, pdata->base + RNG_CR);
-
-	return clk_disable(&pdata->clk);
-}
-
-static int stm32_rng_probe(struct udevice *dev)
-{
-	struct stm32_rng_plat *pdata = dev_get_plat(dev);
-
-	pdata->data = (struct stm32_rng_data *)dev_get_driver_data(dev);
-
-	reset_assert(&pdata->rst);
-	udelay(20);
-	reset_deassert(&pdata->rst);
-
-	return stm32_rng_init(pdata);
-}
-
-static int stm32_rng_remove(struct udevice *dev)
-{
-	struct stm32_rng_plat *pdata = dev_get_plat(dev);
-
-	return stm32_rng_cleanup(pdata);
-}
-
-static int stm32_rng_of_to_plat(struct udevice *dev)
-{
-	struct stm32_rng_plat *pdata = dev_get_plat(dev);
-	int err;
-
-	pdata->base = dev_read_addr(dev);
-	if (!pdata->base)
-		return -ENOMEM;
-
-	err = clk_get_by_index(dev, 0, &pdata->clk);
-	if (err)
-		return err;
-
-	err = reset_get_by_index(dev, 0, &pdata->rst);
-	if (err)
-		return err;
-
-	return 0;
-}
-
-static const struct dm_rng_ops stm32_rng_ops = {
-	.read = stm32_rng_read,
-};
-
-static const struct stm32_rng_data stm32mp13_rng_data = {
-	.has_cond_reset = true,
-};
-
-static const struct stm32_rng_data stm32_rng_data = {
-	.has_cond_reset = false,
-};
-
-static const struct udevice_id stm32_rng_match[] = {
-	{.compatible = "st,stm32mp13-rng", .data = (ulong)&stm32mp13_rng_data},
-	{.compatible = "st,stm32-rng", .data = (ulong)&stm32_rng_data},
-	{},
-};
-
-U_BOOT_DRIVER(stm32_rng) = {
-	.name = "stm32-rng",
-	.id = UCLASS_RNG,
-	.of_match = stm32_rng_match,
-	.ops = &stm32_rng_ops,
-	.probe = stm32_rng_probe,
-	.remove = stm32_rng_remove,
-	.plat_auto	= sizeof(struct stm32_rng_plat),
-	.of_to_plat = stm32_rng_of_to_plat,
-};