target/linux/starfive/patches-6.1/0015-reset-starfive-Add-StarFive-JH7110-reset-driver.patch

   1 From ea2f40c943f4a6d39a2f3ea4660266250d37c95a Mon Sep 17 00:00:00 2001
   2 From: Hal Feng <hal.feng@starfivetech.com>
   3 Date: Sat, 1 Apr 2023 19:19:27 +0800
   4 Subject: [PATCH 015/122] reset: starfive: Add StarFive JH7110 reset driver
   5
   6 Add auxiliary driver to support StarFive JH7110 system
   7 and always-on resets.
   8
   9 Tested-by: Tommaso Merciai <tomm.merciai@gmail.com>
  10 Reviewed-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
  11 Signed-off-by: Hal Feng <hal.feng@starfivetech.com>
  12 Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
  13 ---
  14  drivers/reset/starfive/Kconfig                |  8 +++
  15  drivers/reset/starfive/Makefile               |  1 +
  16  .../reset/starfive/reset-starfive-jh7110.c    | 70 +++++++++++++++++++
  17  3 files changed, 79 insertions(+)
  18  create mode 100644 drivers/reset/starfive/reset-starfive-jh7110.c
  19
  20 --- a/drivers/reset/starfive/Kconfig
  21 +++ b/drivers/reset/starfive/Kconfig
  22 @@ -10,3 +10,11 @@ config RESET_STARFIVE_JH7100
  23         default ARCH_STARFIVE
  24         help
  25           This enables the reset controller driver for the StarFive JH7100 SoC.
  26 +
  27 +config RESET_STARFIVE_JH7110
  28 +       bool "StarFive JH7110 Reset Driver"
  29 +       depends on AUXILIARY_BUS && CLK_STARFIVE_JH7110_SYS
  30 +       select RESET_STARFIVE_JH71X0
  31 +       default ARCH_STARFIVE
  32 +       help
  33 +         This enables the reset controller driver for the StarFive JH7110 SoC.
  34 --- a/drivers/reset/starfive/Makefile
  35 +++ b/drivers/reset/starfive/Makefile
  36 @@ -2,3 +2,4 @@
  37  obj-$(CONFIG_RESET_STARFIVE_JH71X0)            += reset-starfive-jh71x0.o
  38
  39  obj-$(CONFIG_RESET_STARFIVE_JH7100)            += reset-starfive-jh7100.o
  40 +obj-$(CONFIG_RESET_STARFIVE_JH7110)            += reset-starfive-jh7110.o
  41 --- /dev/null
  42 +++ b/drivers/reset/starfive/reset-starfive-jh7110.c
  43 @@ -0,0 +1,70 @@
  44 +// SPDX-License-Identifier: GPL-2.0-or-later
  45 +/*
  46 + * Reset driver for the StarFive JH7110 SoC
  47 + *
  48 + * Copyright (C) 2022 StarFive Technology Co., Ltd.
  49 + */
  50 +
  51 +#include <linux/auxiliary_bus.h>
  52 +
  53 +#include "reset-starfive-jh71x0.h"
  54 +
  55 +#include <dt-bindings/reset/starfive,jh7110-crg.h>
  56 +
  57 +struct jh7110_reset_info {
  58 +       unsigned int nr_resets;
  59 +       unsigned int assert_offset;
  60 +       unsigned int status_offset;
  61 +};
  62 +
  63 +static const struct jh7110_reset_info jh7110_sys_info = {
  64 +       .nr_resets = JH7110_SYSRST_END,
  65 +       .assert_offset = 0x2F8,
  66 +       .status_offset = 0x308,
  67 +};
  68 +
  69 +static const struct jh7110_reset_info jh7110_aon_info = {
  70 +       .nr_resets = JH7110_AONRST_END,
  71 +       .assert_offset = 0x38,
  72 +       .status_offset = 0x3C,
  73 +};
  74 +
  75 +static int jh7110_reset_probe(struct auxiliary_device *adev,
  76 +                             const struct auxiliary_device_id *id)
  77 +{
  78 +       struct jh7110_reset_info *info = (struct jh7110_reset_info *)(id->driver_data);
  79 +       void __iomem **base = (void __iomem **)dev_get_drvdata(adev->dev.parent);
  80 +
  81 +       if (!info || !base)
  82 +               return -ENODEV;
  83 +
  84 +       return reset_starfive_jh71x0_register(&adev->dev, adev->dev.parent->of_node,
  85 +                                             *base + info->assert_offset,
  86 +                                             *base + info->status_offset,
  87 +                                             NULL,
  88 +                                             info->nr_resets,
  89 +                                             NULL);
  90 +}
  91 +
  92 +static const struct auxiliary_device_id jh7110_reset_ids[] = {
  93 +       {
  94 +               .name = "clk_starfive_jh7110_sys.rst-sys",
  95 +               .driver_data = (kernel_ulong_t)&jh7110_sys_info,
  96 +       },
  97 +       {
  98 +               .name = "clk_starfive_jh7110_sys.rst-aon",
  99 +               .driver_data = (kernel_ulong_t)&jh7110_aon_info,
 100 +       },
 101 +       { /* sentinel */ }
 102 +};
 103 +MODULE_DEVICE_TABLE(auxiliary, jh7110_reset_ids);
 104 +
 105 +static struct auxiliary_driver jh7110_reset_driver = {
 106 +       .probe          = jh7110_reset_probe,
 107 +       .id_table       = jh7110_reset_ids,
 108 +};
 109 +module_auxiliary_driver(jh7110_reset_driver);
 110 +
 111 +MODULE_AUTHOR("Hal Feng <hal.feng@starfivetech.com>");
 112 +MODULE_DESCRIPTION("StarFive JH7110 reset driver");
 113 +MODULE_LICENSE("GPL");