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clk: support clk tree dump

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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>
This commit is contained in:
Peng Fan 2019-08-21 13:35:14 +00:00 committed by Lukasz Majewski
parent 0520be0f67
commit aeeb2e6d9c
1 changed files with 51 additions and 32 deletions
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83
cmd/clk.c
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@ -7,51 +7,70 @@
#include <clk.h> #include <clk.h>
#if defined(CONFIG_DM) && defined(CONFIG_CLK) #if defined(CONFIG_DM) && defined(CONFIG_CLK)
#include <dm.h> #include <dm.h>
#include <dm/device.h>
#include <dm/root.h>
#include <dm/device-internal.h> #include <dm/device-internal.h>
#include <linux/clk-provider.h>
#endif #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) int __weak soc_clk_dump(void)
{ {
#if defined(CONFIG_DM) && defined(CONFIG_CLK) struct udevice *root;
struct udevice *dev;
struct uclass *uc;
struct clk clk;
int ret;
ulong rate;
/* Device addresses start at 1 */ root = dm_root();
ret = uclass_get(UCLASS_CLK, &uc); if (root) {
if (ret) printf(" Rate Usecnt Name\n");
return ret; printf("------------------------------------------\n");
show_clks(root, -1, 0);
uclass_foreach_dev(dev, uc) {
memset(&clk, 0, sizeof(clk));
ret = device_probe(dev);
if (ret)
goto noclk;
ret = clk_request(dev, &clk);
if (ret)
goto noclk;
rate = clk_get_rate(&clk);
clk_free(&clk);
if (rate == -ENODEV)
goto noclk;
printf("%-30.30s : %lu Hz\n", dev->name, rate);
continue;
noclk:
printf("%-30.30s : ? Hz\n", dev->name);
} }
return 0; return 0;
}
#else #else
int __weak soc_clk_dump(void)
{
puts("Not implemented\n"); puts("Not implemented\n");
return 1; return 1;
#endif
} }
#endif
static int do_clk_dump(cmd_tbl_t *cmdtp, int flag, int argc, static int do_clk_dump(cmd_tbl_t *cmdtp, int flag, int argc,
char *const argv[]) char *const argv[])