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hwrng: ks-sa - access private data via struct hwrng

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This driver uses a struct ks_sa_rng for its private data. It contains a
struct hwrng. Call container_of to get from hwrng to ks_sa_rng.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Martin Kaiser 2023-08-24 21:40:35 +02:00 committed by Herbert Xu
parent d90dde8c55
commit b8f836cbe1
1 changed files with 4 additions and 11 deletions
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15
drivers/char/hw_random/ks-sa-rng.c
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@ -113,8 +113,7 @@ static unsigned int refill_delay_ns(unsigned long clk_rate)
static int ks_sa_rng_init(struct hwrng *rng)
{
u32 value;
struct device *dev = (struct device *)rng->priv;
struct ks_sa_rng *ks_sa_rng = dev_get_drvdata(dev);
struct ks_sa_rng *ks_sa_rng = container_of(rng, struct ks_sa_rng, rng);
unsigned long clk_rate = clk_get_rate(ks_sa_rng->clk);
/* Enable RNG module */
@ -153,8 +152,7 @@ static int ks_sa_rng_init(struct hwrng *rng)
static void ks_sa_rng_cleanup(struct hwrng *rng)
{
struct device *dev = (struct device *)rng->priv;
struct ks_sa_rng *ks_sa_rng = dev_get_drvdata(dev);
struct ks_sa_rng *ks_sa_rng = container_of(rng, struct ks_sa_rng, rng);
/* Disable RNG */
writel(0, &ks_sa_rng->reg_rng->control);
@ -164,8 +162,7 @@ static void ks_sa_rng_cleanup(struct hwrng *rng)
static int ks_sa_rng_data_read(struct hwrng *rng, u32 *data)
{
struct device *dev = (struct device *)rng->priv;
struct ks_sa_rng *ks_sa_rng = dev_get_drvdata(dev);
struct ks_sa_rng *ks_sa_rng = container_of(rng, struct ks_sa_rng, rng);
/* Read random data */
data[0] = readl(&ks_sa_rng->reg_rng->output_l);
@ -179,8 +176,7 @@ static int ks_sa_rng_data_read(struct hwrng *rng, u32 *data)
static int ks_sa_rng_data_present(struct hwrng *rng, int wait)
{
struct device *dev = (struct device *)rng->priv;
struct ks_sa_rng *ks_sa_rng = dev_get_drvdata(dev);
struct ks_sa_rng *ks_sa_rng = container_of(rng, struct ks_sa_rng, rng);
u64 now = ktime_get_ns();
u32 ready;
@ -225,7 +221,6 @@ static int ks_sa_rng_probe(struct platform_device *pdev)
.data_present = ks_sa_rng_data_present,
.cleanup = ks_sa_rng_cleanup,
};
ks_sa_rng->rng.priv = (unsigned long)dev;
ks_sa_rng->reg_rng = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(ks_sa_rng->reg_rng))
@ -248,8 +243,6 @@ static int ks_sa_rng_probe(struct platform_device *pdev)
return ret;
}
platform_set_drvdata(pdev, ks_sa_rng);
return devm_hwrng_register(&pdev->dev, &ks_sa_rng->rng);
}