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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2013 Xilinx, Inc.
*/
#include <common.h>
#include <command.h>
#include <clk.h>
#if defined(CONFIG_DM) && defined(CONFIG_CLK)
#include <dm.h>
#include <dm/device.h>
#include <dm/root.h>
#include <dm/device-internal.h>
#include <linux/clk-provider.h>
#endif
#if defined(CONFIG_DM) && defined(CONFIG_CLK)
static void show_clks(struct udevice *dev, int depth, int last_flag)
{
int i, is_last;
struct udevice *child;
struct clk *clkp, *parent;
u32 rate;
clkp = dev_get_clk_ptr(dev);
if (device_get_uclass_id(dev) == UCLASS_CLK && clkp) {
parent = clk_get_parent(clkp);
if (!IS_ERR(parent) && depth == -1)
return;
depth++;
rate = clk_get_rate(clkp);
printf(" %-12u %8d ", rate, clkp->enable_count);
for (i = depth; i >= 0; i--) {
is_last = (last_flag >> i) & 1;
if (i) {
if (is_last)
printf(" ");
else
printf("| ");
} else {
if (is_last)
printf("`-- ");
else
printf("|-- ");
}
}
printf("%s\n", dev->name);
}
list_for_each_entry(child, &dev->child_head, sibling_node) {
if (child == dev)
continue;
is_last = list_is_last(&child->sibling_node, &dev->child_head);
show_clks(child, depth, (last_flag << 1) | is_last);
}
}
int __weak soc_clk_dump(void)
{
struct udevice *dev;
struct uclass *uc;
int ret;
ret = uclass_get(UCLASS_CLK, &uc);
if (ret)
return ret;
printf(" Rate Usecnt Name\n");
printf("------------------------------------------\n");
uclass_foreach_dev(dev, uc)
show_clks(dev, -1, 0);
return 0;
}
#else
int __weak soc_clk_dump(void)
{
puts("Not implemented\n");
return 1;
}
#endif
static int do_clk_dump(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
int ret;
ret = soc_clk_dump();
if (ret < 0) {
printf("Clock dump error %d\n", ret);
ret = CMD_RET_FAILURE;
}
return ret;
}
#if CONFIG_IS_ENABLED(DM) && CONFIG_IS_ENABLED(CLK)
struct udevice *clk_lookup(const char *name)
{
int i = 0;
struct udevice *dev;
do {
uclass_get_device(UCLASS_CLK, i++, &dev);
if (!strcmp(name, dev->name))
return dev;
} while (dev);
return NULL;
}
static int do_clk_setfreq(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct clk *clk = NULL;
s32 freq;
struct udevice *dev;
freq = dectoul(argv[2], NULL);
dev = clk_lookup(argv[1]);
if (dev)
clk = dev_get_clk_ptr(dev);
if (!clk) {
printf("clock '%s' not found.\n", argv[1]);
return -EINVAL;
}
freq = clk_set_rate(clk, freq);
if (freq < 0) {
printf("set_rate failed: %d\n", freq);
return CMD_RET_FAILURE;
}
printf("set_rate returns %u\n", freq);
return 0;
}
#endif
static struct cmd_tbl cmd_clk_sub[] = {
U_BOOT_CMD_MKENT(dump, 1, 1, do_clk_dump, "", ""),
#if CONFIG_IS_ENABLED(DM) && CONFIG_IS_ENABLED(CLK)
U_BOOT_CMD_MKENT(setfreq, 3, 1, do_clk_setfreq, "", ""),
#endif
};
static int do_clk(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct cmd_tbl *c;
if (argc < 2)
return CMD_RET_USAGE;
/* Strip off leading 'clk' command argument */
argc--;
argv++;
c = find_cmd_tbl(argv[0], &cmd_clk_sub[0], ARRAY_SIZE(cmd_clk_sub));
if (c)
return c->cmd(cmdtp, flag, argc, argv);
else
return CMD_RET_USAGE;
}
#ifdef CONFIG_SYS_LONGHELP
static char clk_help_text[] =
"dump - Print clock frequencies\n"
"setfreq [clk] [freq] - Set clock frequency";
#endif
U_BOOT_CMD(clk, 4, 1, do_clk, "CLK sub-system", clk_help_text);
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