target/linux/mediatek/patches-5.15/405-mt7986-trng-add-rng-support.patch

   1 From f6ba5e17bee38f8ffe118c47fbfef3cf90eb87ff Mon Sep 17 00:00:00 2001
   2 From: "Mingming.Su" <Mingming.Su@mediatek.com>
   3 Date: Wed, 30 Jun 2021 16:59:32 +0800
   4 Subject: [PATCH] mt7986: trng: add rng 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 ---
  11  drivers/char/hw_random/mtk-rng.c | 5 +++--
  12  1 file changed, 3 insertions(+), 2 deletions(-)
  13
  14 --- a/drivers/char/hw_random/mtk-rng.c
  15 +++ b/drivers/char/hw_random/mtk-rng.c
  16 @@ -22,7 +22,7 @@
  17  #define RNG_AUTOSUSPEND_TIMEOUT                100
  18
  19  #define USEC_POLL                      2
  20 -#define TIMEOUT_POLL                   20
  21 +#define TIMEOUT_POLL                   60
  22
  23  #define RNG_CTRL                       0x00
  24  #define RNG_EN                         BIT(0)
  25 @@ -77,7 +77,7 @@ static bool mtk_rng_wait_ready(struct hw
  26                 readl_poll_timeout_atomic(priv->base + RNG_CTRL, ready,
  27                                           ready & RNG_READY, USEC_POLL,
  28                                           TIMEOUT_POLL);
  29 -       return !!ready;
  30 +       return !!(ready & RNG_READY);
  31  }
  32
  33  static int mtk_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait)
  34 @@ -179,6 +179,7 @@ static const struct dev_pm_ops mtk_rng_p
  35  #endif /* CONFIG_PM */
  36
  37  static const struct of_device_id mtk_rng_match[] = {
  38 +       { .compatible = "mediatek,mt7986-rng" },
  39         { .compatible = "mediatek,mt7623-rng" },
  40         {},
  41  };