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Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Michal Simek08d0d6f2013-11-21 13:39:02 -08002/*
3 * Copyright (C) 2013 Xilinx, Inc.
Michal Simek08d0d6f2013-11-21 13:39:02 -08004 */
5#include <common.h>
6#include <command.h>
7#include <clk.h>
Marek Vasutff8eee02018-08-08 22:10:44 +02008#if defined(CONFIG_DM) && defined(CONFIG_CLK)
9#include <dm.h>
Peng Fanaeeb2e62019-08-21 13:35:14 +000010#include <dm/device.h>
11#include <dm/root.h>
Marek Vasutff8eee02018-08-08 22:10:44 +020012#include <dm/device-internal.h>
Peng Fanaeeb2e62019-08-21 13:35:14 +000013#include <linux/clk-provider.h>
Marek Vasutff8eee02018-08-08 22:10:44 +020014#endif
Michal Simek08d0d6f2013-11-21 13:39:02 -080015
Peng Fanaeeb2e62019-08-21 13:35:14 +000016#if defined(CONFIG_DM) && defined(CONFIG_CLK)
17static void show_clks(struct udevice *dev, int depth, int last_flag)
18{
19 int i, is_last;
20 struct udevice *child;
Tero Kristo1a725e22021-06-11 11:45:07 +030021 struct clk *clkp, *parent;
Peng Fanaeeb2e62019-08-21 13:35:14 +000022 u32 rate;
23
24 clkp = dev_get_clk_ptr(dev);
25 if (device_get_uclass_id(dev) == UCLASS_CLK && clkp) {
Tero Kristo1a725e22021-06-11 11:45:07 +030026 parent = clk_get_parent(clkp);
27 if (!IS_ERR(parent) && depth == -1)
28 return;
Patrick Delaunay689ca8c2020-07-30 14:04:10 +020029 depth++;
Peng Fanaeeb2e62019-08-21 13:35:14 +000030 rate = clk_get_rate(clkp);
31
Patrick Delaunaycc632842020-07-30 14:04:09 +020032 printf(" %-12u %8d ", rate, clkp->enable_count);
Peng Fanaeeb2e62019-08-21 13:35:14 +000033
Patrick Delaunaycc632842020-07-30 14:04:09 +020034 for (i = depth; i >= 0; i--) {
35 is_last = (last_flag >> i) & 1;
36 if (i) {
37 if (is_last)
38 printf(" ");
39 else
40 printf("| ");
41 } else {
42 if (is_last)
43 printf("`-- ");
44 else
45 printf("|-- ");
46 }
Peng Fanaeeb2e62019-08-21 13:35:14 +000047 }
Peng Fanaeeb2e62019-08-21 13:35:14 +000048
Patrick Delaunaycc632842020-07-30 14:04:09 +020049 printf("%s\n", dev->name);
Peng Fanaeeb2e62019-08-21 13:35:14 +000050 }
51
52 list_for_each_entry(child, &dev->child_head, sibling_node) {
Tero Kristo1a725e22021-06-11 11:45:07 +030053 if (child == dev)
54 continue;
55
Peng Fanaeeb2e62019-08-21 13:35:14 +000056 is_last = list_is_last(&child->sibling_node, &dev->child_head);
Patrick Delaunay689ca8c2020-07-30 14:04:10 +020057 show_clks(child, depth, (last_flag << 1) | is_last);
Peng Fanaeeb2e62019-08-21 13:35:14 +000058 }
59}
60
Michal Simek08d0d6f2013-11-21 13:39:02 -080061int __weak soc_clk_dump(void)
62{
Tero Kristo1a725e22021-06-11 11:45:07 +030063 struct udevice *dev;
64 struct uclass *uc;
65 int ret;
Marek Vasutff8eee02018-08-08 22:10:44 +020066
Tero Kristo1a725e22021-06-11 11:45:07 +030067 ret = uclass_get(UCLASS_CLK, &uc);
68 if (ret)
69 return ret;
70
71 printf(" Rate Usecnt Name\n");
72 printf("------------------------------------------\n");
73
74 uclass_foreach_dev(dev, uc)
75 show_clks(dev, -1, 0);
Marek Vasutff8eee02018-08-08 22:10:44 +020076
77 return 0;
Peng Fanaeeb2e62019-08-21 13:35:14 +000078}
Marek Vasutff8eee02018-08-08 22:10:44 +020079#else
Peng Fanaeeb2e62019-08-21 13:35:14 +000080int __weak soc_clk_dump(void)
81{
Michal Simek08d0d6f2013-11-21 13:39:02 -080082 puts("Not implemented\n");
83 return 1;
84}
Peng Fanaeeb2e62019-08-21 13:35:14 +000085#endif
Michal Simek08d0d6f2013-11-21 13:39:02 -080086
Simon Glass09140112020-05-10 11:40:03 -060087static int do_clk_dump(struct cmd_tbl *cmdtp, int flag, int argc,
Michal Simek08d0d6f2013-11-21 13:39:02 -080088 char *const argv[])
89{
Michal Simekebc675b2018-04-19 15:15:25 +020090 int ret;
91
92 ret = soc_clk_dump();
93 if (ret < 0) {
94 printf("Clock dump error %d\n", ret);
95 ret = CMD_RET_FAILURE;
96 }
97
98 return ret;
Michal Simek08d0d6f2013-11-21 13:39:02 -080099}
100
Tero Kristo7ab418f2021-06-11 11:45:09 +0300101#if CONFIG_IS_ENABLED(DM) && CONFIG_IS_ENABLED(CLK)
102struct udevice *clk_lookup(const char *name)
103{
104 int i = 0;
105 struct udevice *dev;
106
107 do {
108 uclass_get_device(UCLASS_CLK, i++, &dev);
109 if (!strcmp(name, dev->name))
110 return dev;
111 } while (dev);
112
113 return NULL;
114}
115
116static int do_clk_setfreq(struct cmd_tbl *cmdtp, int flag, int argc,
117 char *const argv[])
118{
119 struct clk *clk = NULL;
120 s32 freq;
121 struct udevice *dev;
122
123 freq = simple_strtoul(argv[2], NULL, 10);
124
125 dev = clk_lookup(argv[1]);
126
127 if (dev)
128 clk = dev_get_clk_ptr(dev);
129
130 if (!clk) {
131 printf("clock '%s' not found.\n", argv[1]);
132 return -EINVAL;
133 }
134
135 freq = clk_set_rate(clk, freq);
136 if (freq < 0) {
137 printf("set_rate failed: %d\n", freq);
138 return CMD_RET_FAILURE;
139 }
140
141 printf("set_rate returns %u\n", freq);
142 return 0;
143}
144#endif
145
Simon Glass09140112020-05-10 11:40:03 -0600146static struct cmd_tbl cmd_clk_sub[] = {
Michal Simek08d0d6f2013-11-21 13:39:02 -0800147 U_BOOT_CMD_MKENT(dump, 1, 1, do_clk_dump, "", ""),
Tero Kristo7ab418f2021-06-11 11:45:09 +0300148#if CONFIG_IS_ENABLED(DM) && CONFIG_IS_ENABLED(CLK)
149 U_BOOT_CMD_MKENT(setfreq, 3, 1, do_clk_setfreq, "", ""),
150#endif
Michal Simek08d0d6f2013-11-21 13:39:02 -0800151};
152
Simon Glass09140112020-05-10 11:40:03 -0600153static int do_clk(struct cmd_tbl *cmdtp, int flag, int argc,
Michal Simek08d0d6f2013-11-21 13:39:02 -0800154 char *const argv[])
155{
Simon Glass09140112020-05-10 11:40:03 -0600156 struct cmd_tbl *c;
Michal Simek08d0d6f2013-11-21 13:39:02 -0800157
158 if (argc < 2)
159 return CMD_RET_USAGE;
160
161 /* Strip off leading 'clk' command argument */
162 argc--;
163 argv++;
164
165 c = find_cmd_tbl(argv[0], &cmd_clk_sub[0], ARRAY_SIZE(cmd_clk_sub));
166
167 if (c)
168 return c->cmd(cmdtp, flag, argc, argv);
169 else
170 return CMD_RET_USAGE;
171}
172
173#ifdef CONFIG_SYS_LONGHELP
174static char clk_help_text[] =
Tero Kristo7ab418f2021-06-11 11:45:09 +0300175 "dump - Print clock frequencies\n"
176 "setfreq [clk] [freq] - Set clock frequency";
Michal Simek08d0d6f2013-11-21 13:39:02 -0800177#endif
178
Tero Kristo7ab418f2021-06-11 11:45:09 +0300179U_BOOT_CMD(clk, 4, 1, do_clk, "CLK sub-system", clk_help_text);