target/linux/mediatek/patches-6.6/405-v6.2-mt7986-trng-add-rng-support.patch

   1 From f1da27b7c4191f78ed81d3dabf64c769f896296c Mon Sep 17 00:00:00 2001
   2 From: "Mingming.Su" <Mingming.Su@mediatek.com>
   3 Date: Sat, 8 Oct 2022 18:45:53 +0200
   4 Subject: [PATCH] hwrng: mtk - add mt7986 support
   5
   6 1. Add trng compatible name for MT7986
   7 2. Fix mtk_rng_wait_ready() function
   8
   9 Signed-off-by: Mingming.Su <Mingming.Su@mediatek.com>
  10 Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
  11 Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
  12 ---
  13  drivers/char/hw_random/mtk-rng.c | 5 +++--
  14  1 file changed, 3 insertions(+), 2 deletions(-)
  15
  16 --- a/drivers/char/hw_random/mtk-rng.c
  17 +++ b/drivers/char/hw_random/mtk-rng.c
  18 @@ -22,7 +22,7 @@
  19  #define RNG_AUTOSUSPEND_TIMEOUT                100
  20
  21  #define USEC_POLL                      2
  22 -#define TIMEOUT_POLL                   20
  23 +#define TIMEOUT_POLL                   60
  24
  25  #define RNG_CTRL                       0x00
  26  #define RNG_EN                         BIT(0)
  27 @@ -77,7 +77,7 @@ static bool mtk_rng_wait_ready(struct hw
  28                 readl_poll_timeout_atomic(priv->base + RNG_CTRL, ready,
  29                                           ready & RNG_READY, USEC_POLL,
  30                                           TIMEOUT_POLL);
  31 -       return !!ready;
  32 +       return !!(ready & RNG_READY);
  33  }
  34
  35  static int mtk_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait)
  36 @@ -179,6 +179,7 @@ static const struct dev_pm_ops mtk_rng_p
  37  #endif /* CONFIG_PM */
  38
  39  static const struct of_device_id mtk_rng_match[] = {
  40 +       { .compatible = "mediatek,mt7986-rng" },
  41         { .compatible = "mediatek,mt7623-rng" },
  42         {},
  43  };