target/linux/layerscape/patches-5.4/802-can-0017-can-flexcan-flexcan_mailbox_read-make-use-of-flexcan.patch

   1 From 6340760d0671e92b15ff92b7eda41bbdd9702437 Mon Sep 17 00:00:00 2001
   2 From: Marc Kleine-Budde <mkl@pengutronix.de>
   3 Date: Fri, 1 Mar 2019 16:27:59 +0100
   4 Subject: [PATCH] can: flexcan: flexcan_mailbox_read() make use of
   5  flexcan_write64() to mark the mailbox as read
   6
   7 In the previous patch the function flexcan_write64() was introduced.
   8
   9 This patch replaces the open coded variant in flexcan_mailbox_read()
  10 that marks a mailbox as read, by a single call to flexcan_write64().
  11
  12 Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
  13 ---
  14  drivers/net/can/flexcan.c | 11 +++--------
  15  1 file changed, 3 insertions(+), 8 deletions(-)
  16
  17 --- a/drivers/net/can/flexcan.c
  18 +++ b/drivers/net/can/flexcan.c
  19 @@ -885,15 +885,10 @@ static struct sk_buff *flexcan_mailbox_r
  20         }
  21
  22   mark_as_read:
  23 -       if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) {
  24 -               /* Clear IRQ */
  25 -               if (n < 32)
  26 -                       priv->write(BIT(n), &regs->iflag1);
  27 -               else
  28 -                       priv->write(BIT(n - 32), &regs->iflag2);
  29 -       } else {
  30 +       if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP)
  31 +               flexcan_write64(priv, FLEXCAN_IFLAG_MB(n), &regs->iflag1);
  32 +       else
  33                 priv->write(FLEXCAN_IFLAG_RX_FIFO_AVAILABLE, &regs->iflag1);
  34 -       }
  35
  36         /* Read the Free Running Timer. It is optional but recommended
  37          * to unlock Mailbox as soon as possible and make it available