clk: Show symbolic clock flags in debugfs (a6059ab9) · Commits · 戴 / test

drivers/clk/clk.c

+55 −2

Original line number	Diff line number	Diff line
		@@ -24,6 +24,7 @@
		#include <linux/pm_runtime.h>
		#include <linux/sched.h>
		#include <linux/clkdev.h>
		#include <linux/stringify.h>

		#include "clk.h"

		@@ -2554,6 +2555,58 @@ static const struct file_operations clk_dump_fops = {
		.release = single_release,
		};

		static const struct {
		unsigned long flag;
		const char *name;
		} clk_flags[] = {
		#define ENTRY(f) { f, __stringify(f) }
		ENTRY(CLK_SET_RATE_GATE),
		ENTRY(CLK_SET_PARENT_GATE),
		ENTRY(CLK_SET_RATE_PARENT),
		ENTRY(CLK_IGNORE_UNUSED),
		ENTRY(CLK_IS_BASIC),
		ENTRY(CLK_GET_RATE_NOCACHE),
		ENTRY(CLK_SET_RATE_NO_REPARENT),
		ENTRY(CLK_GET_ACCURACY_NOCACHE),
		ENTRY(CLK_RECALC_NEW_RATES),
		ENTRY(CLK_SET_RATE_UNGATE),
		ENTRY(CLK_IS_CRITICAL),
		ENTRY(CLK_OPS_PARENT_ENABLE),
		#undef ENTRY
		};

		static int clk_flags_dump(struct seq_file s, void data)
		{
		struct clk_core *core = s->private;
		unsigned long flags = core->flags;
		unsigned int i;

		for (i = 0; flags && i < ARRAY_SIZE(clk_flags); i++) {
		if (flags & clk_flags[i].flag) {
		seq_printf(s, "%s\n", clk_flags[i].name);
		flags &= ~clk_flags[i].flag;
		}
		}
		if (flags) {
		/* Unknown flags */
		seq_printf(s, "0x%lx\n", flags);
		}

		return 0;
		}

		static int clk_flags_open(struct inode inode, struct file file)
		{
		return single_open(file, clk_flags_dump, inode->i_private);
		}

		static const struct file_operations clk_flags_fops = {
		.open = clk_flags_open,
		.read = seq_read,
		.llseek = seq_lseek,
		.release = single_release,
		};

		static int possible_parents_dump(struct seq_file s, void data)
		{
		struct clk_core *core = s->private;
		@@ -2610,8 +2663,8 @@ static int clk_debug_create_one(struct clk_core core, struct dentry pdentry)
		if (!d)
		goto err_out;

		d = debugfs_create_x32("clk_flags", S_IRUGO, core->dentry,
		(u32 *)&core->flags);
		d = debugfs_create_file("clk_flags", 0444, core->dentry, core,
		&clk_flags_fops);
		if (!d)
		goto err_out;

include/linux/clk-provider.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -20,6 +20,8 @@
		* flags used across common struct clk. these flags should only affect the
		* top-level framework. custom flags for dealing with hardware specifics
		* belong in struct clk_foo
		*
		* Please update clk_flags[] in drivers/clk/clk.c when making changes here!
		*/
		#define CLK_SET_RATE_GATE BIT(0) /* must be gated across rate change */
		#define CLK_SET_PARENT_GATE BIT(1) /* must be gated across re-parent */

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