Commit 326ed382 authored by lionel.debieve@st.com's avatar lionel.debieve@st.com Committed by Herbert Xu

hwrng: stm32 - add reset during probe

Avoid issue when probing the RNG without
reset if bad status has been detected previously
Signed-off-by: default avatarLionel Debieve <lionel.debieve@st.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 01745706
......@@ -21,6 +21,7 @@
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>
#include <linux/slab.h>
#define RNG_CR 0x00
......@@ -46,6 +47,7 @@ struct stm32_rng_private {
struct hwrng rng;
void __iomem *base;
struct clk *clk;
struct reset_control *rst;
};
static int stm32_rng_read(struct hwrng *rng, void *data, size_t max, bool wait)
......@@ -140,6 +142,13 @@ static int stm32_rng_probe(struct platform_device *ofdev)
if (IS_ERR(priv->clk))
return PTR_ERR(priv->clk);
priv->rst = devm_reset_control_get(&ofdev->dev, NULL);
if (!IS_ERR(priv->rst)) {
reset_control_assert(priv->rst);
udelay(2);
reset_control_deassert(priv->rst);
}
dev_set_drvdata(dev, priv);
priv->rng.name = dev_driver_string(dev),
......
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