target/linux/bcm27xx/patches-6.1/950-0863-reset-reset-brcmstb-rescal-Support-shared-use.patch

   1 From 87b1126181f79fb2558652af0d7fafd9deaab5f3 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.com>
   3 Date: Tue, 7 Sep 2021 14:49:00 +0100
   4 Subject: [PATCH] reset: reset-brcmstb-rescal: Support shared use
   5
   6 reset_control_reset should not be used with shared reset controllers.
   7 Add support for reset_control_assert and _deassert to get the desired
   8 behaviour and avoid ugly warnings in the kernel log.
   9
  10 Signed-off-by: Phil Elwell <phil@raspberrypi.com>
  11 ---
  12  drivers/reset/reset-brcmstb-rescal.c | 10 ++++++++++
  13  1 file changed, 10 insertions(+)
  14
  15 --- a/drivers/reset/reset-brcmstb-rescal.c
  16 +++ b/drivers/reset/reset-brcmstb-rescal.c
  17 @@ -20,6 +20,7 @@ struct brcm_rescal_reset {
  18         struct reset_controller_dev rcdev;
  19  };
  20
  21 +/* Also doubles a deassert */
  22  static int brcm_rescal_reset_set(struct reset_controller_dev *rcdev,
  23                                  unsigned long id)
  24  {
  25 @@ -52,6 +53,13 @@ static int brcm_rescal_reset_set(struct
  26         return 0;
  27  }
  28
  29 +/* A dummy function - deassert/reset does all the work */
  30 +static int brcm_rescal_reset_assert(struct reset_controller_dev *rcdev,
  31 +                                   unsigned long id)
  32 +{
  33 +       return 0;
  34 +}
  35 +
  36  static int brcm_rescal_reset_xlate(struct reset_controller_dev *rcdev,
  37                                    const struct of_phandle_args *reset_spec)
  38  {
  39 @@ -61,6 +69,8 @@ static int brcm_rescal_reset_xlate(struc
  40
  41  static const struct reset_control_ops brcm_rescal_reset_ops = {
  42         .reset = brcm_rescal_reset_set,
  43 +       .deassert = brcm_rescal_reset_set,
  44 +       .assert = brcm_rescal_reset_assert,
  45  };
  46
  47  static int brcm_rescal_reset_probe(struct platform_device *pdev)