u-boot/cmd/clk.c
Peng Fan aeeb2e6d9c clk: support clk tree dump
The previous code only dump the clk list. This patch is
to support clk tree dump, and also dump the enable_cnt.

The code used in patch is similar to dm_dump_all, but
the code here only filter out the UCLASS_CLK devices.

On i.MX8MM, Partial output:
u-boot=> clk dump
 Rate               Usecnt      Name
------------------------------------------
 24000000             0        |-- clock-osc-24m
 24000000             0        |   |-- dram_pll_ref_sel
 750000000            0        |   |   `-- dram_pll
 750000000            0        |   |       `-- dram_pll_bypass
 750000000            0        |   |           `-- dram_pll_out
 24000000             0        |   |-- arm_pll_ref_sel
 1200000000           0        |   |   `-- arm_pll
 1200000000           0        |   |       `-- arm_pll_bypass
 1200000000           0        |   |           `-- arm_pll_out
 1200000000           0        |   |               `-- arm_a53_src
 1200000000           0        |   |                   `-- arm_a53_cg
 1200000000           0        |   |                       `-- arm_a53_div
 24000000             4        |   |-- sys_pll1_ref_sel
 800000000            4        |   |   `-- sys_pll1
 800000000            4        |   |       `-- sys_pll1_bypass
 800000000            4        |   |           `-- sys_pll1_out
 40000000             0        |   |               |-- sys_pll1_40m

Signed-off-by: Peng Fan <peng.fan@nxp.com>
2019-08-22 00:10:09 +02:00

118 lines
2.2 KiB
C

// 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;
u32 rate;
clkp = dev_get_clk_ptr(dev);
if (device_get_uclass_id(dev) == UCLASS_CLK && clkp) {
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) {
is_last = list_is_last(&child->sibling_node, &dev->child_head);
show_clks(child, depth + 1, (last_flag << 1) | is_last);
}
}
int __weak soc_clk_dump(void)
{
struct udevice *root;
root = dm_root();
if (root) {
printf(" Rate Usecnt Name\n");
printf("------------------------------------------\n");
show_clks(root, -1, 0);
}
return 0;
}
#else
int __weak soc_clk_dump(void)
{
puts("Not implemented\n");
return 1;
}
#endif
static int do_clk_dump(cmd_tbl_t *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;
}
static cmd_tbl_t cmd_clk_sub[] = {
U_BOOT_CMD_MKENT(dump, 1, 1, do_clk_dump, "", ""),
};
static int do_clk(cmd_tbl_t *cmdtp, int flag, int argc,
char *const argv[])
{
cmd_tbl_t *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";
#endif
U_BOOT_CMD(clk, 2, 1, do_clk, "CLK sub-system", clk_help_text);