rockchip: rk3128-cru: sync the clock dt-binding header from Linux
[platform/kernel/u-boot.git] / drivers / reset / reset-zynqmp.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (C) 2021 Xilinx, Inc. - Michal Simek
4  */
5
6 #define LOG_CATEGORY UCLASS_RESET
7
8 #include <common.h>
9 #include <dm.h>
10 #include <dm/device_compat.h>
11 #include <reset-uclass.h>
12 #include <zynqmp_firmware.h>
13
14 #define ZYNQMP_NR_RESETS        (ZYNQMP_PM_RESET_END - ZYNQMP_PM_RESET_START)
15 #define ZYNQMP_RESET_ID         ZYNQMP_PM_RESET_START
16
17 struct zynqmp_reset_priv {
18         u32 reset_id;
19         u32 nr_reset;
20 };
21
22 static int zynqmp_pm_reset_assert(const u32 reset,
23                                   const enum zynqmp_pm_reset_action assert_flag)
24 {
25         return xilinx_pm_request(PM_RESET_ASSERT, reset, assert_flag, 0, 0,
26                                  NULL);
27 }
28
29 static int zynqmp_reset_assert(struct reset_ctl *rst)
30 {
31         struct zynqmp_reset_priv *priv = dev_get_priv(rst->dev);
32
33         dev_dbg(rst->dev, "%s(rst=%p) (id=%lu)\n", __func__, rst, rst->id);
34
35         return zynqmp_pm_reset_assert(priv->reset_id + rst->id,
36                                       PM_RESET_ACTION_ASSERT);
37 }
38
39 static int zynqmp_reset_deassert(struct reset_ctl *rst)
40 {
41         struct zynqmp_reset_priv *priv = dev_get_priv(rst->dev);
42
43         dev_dbg(rst->dev, "%s(rst=%p) (id=%lu)\n", __func__, rst, rst->id);
44
45         return zynqmp_pm_reset_assert(priv->reset_id + rst->id,
46                                       PM_RESET_ACTION_RELEASE);
47 }
48
49 static int zynqmp_reset_request(struct reset_ctl *rst)
50 {
51         struct zynqmp_reset_priv *priv = dev_get_priv(rst->dev);
52
53         dev_dbg(rst->dev, "%s(rst=%p) (id=%lu) (nr_reset=%d)\n", __func__,
54                 rst, rst->id, priv->nr_reset);
55
56         if (priv->nr_reset && rst->id > priv->nr_reset)
57                 return -EINVAL;
58
59         return 0;
60 }
61
62 static int zynqmp_reset_probe(struct udevice *dev)
63 {
64         struct zynqmp_reset_priv *priv = dev_get_priv(dev);
65
66         if (device_is_compatible(dev, "xlnx,zynqmp-reset")) {
67                 priv->reset_id = ZYNQMP_RESET_ID;
68                 priv->nr_reset = ZYNQMP_NR_RESETS;
69         }
70
71         return 0;
72 }
73
74 const struct reset_ops zynqmp_reset_ops = {
75         .request = zynqmp_reset_request,
76         .rst_assert = zynqmp_reset_assert,
77         .rst_deassert = zynqmp_reset_deassert,
78 };
79
80 static const struct udevice_id zynqmp_reset_ids[] = {
81         { .compatible = "xlnx,zynqmp-reset" },
82         { .compatible = "xlnx,versal-reset" },
83         { .compatible = "xlnx,versal-net-reset" },
84         { }
85 };
86
87 U_BOOT_DRIVER(zynqmp_reset) = {
88         .name           = "zynqmp_reset",
89         .id             = UCLASS_RESET,
90         .of_match       = zynqmp_reset_ids,
91         .ops            = &zynqmp_reset_ops,
92         .probe          = zynqmp_reset_probe,
93         .priv_auto      = sizeof(struct zynqmp_reset_priv),
94 };