hwrng: mtk - add mt7986 support

1. Add trng compatible name for MT7986
2. Fix mtk_rng_wait_ready() function

Signed-off-by: Mingming.Su <Mingming.Su@mediatek.com>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/char/hw_random/mtk-rng.c b/drivers/char/hw_random/mtk-rng.c
index 6c00ea0085553a60c246837f626e3a69c5ae01cc..aa993753ab120bcfaff7b14fbdd36524e7a6fc0d 100644 (file)
--- a/drivers/char/hw_random/mtk-rng.c
+++ b/drivers/char/hw_random/mtk-rng.c
@@ -22,7 +22,7 @@
 #define RNG_AUTOSUSPEND_TIMEOUT                100
 
 #define USEC_POLL                      2
-#define TIMEOUT_POLL                   20
+#define TIMEOUT_POLL                   60
 
 #define RNG_CTRL                       0x00
 #define RNG_EN                         BIT(0)
@@ -77,7 +77,7 @@ static bool mtk_rng_wait_ready(struct hwrng *rng, bool wait)
                readl_poll_timeout_atomic(priv->base + RNG_CTRL, ready,
                                          ready & RNG_READY, USEC_POLL,
                                          TIMEOUT_POLL);
-       return !!ready;
+       return !!(ready & RNG_READY);
 }
 
 static int mtk_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait)
@@ -179,6 +179,7 @@ static const struct dev_pm_ops mtk_rng_pm_ops = {
 #endif /* CONFIG_PM */
 
 static const struct of_device_id mtk_rng_match[] = {
+       { .compatible = "mediatek,mt7986-rng" },
        { .compatible = "mediatek,mt7623-rng" },
        {},
 };