msm: clock-debug.c: Display clock vdd fmax values
Display the voltage level a clock votes for debugging.
The currently selected level is shown in square brackets.
Change-Id: I5062c5ea05408c94b63a1eeb376c42da9b7e5908
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>
diff --git a/arch/arm/mach-msm/clock-debug.c b/arch/arm/mach-msm/clock-debug.c
index 099b012..807d587 100644
--- a/arch/arm/mach-msm/clock-debug.c
+++ b/arch/arm/mach-msm/clock-debug.c
@@ -250,6 +250,40 @@
.release = seq_release,
};
+static int fmax_rates_show(struct seq_file *m, void *unused)
+{
+ struct clk *clock = m->private;
+ int level = 0;
+
+ int vdd_level = find_vdd_level(clock, clock->rate);
+ if (vdd_level < 0) {
+ seq_printf(m, "could not find_vdd_level for %s, %ld\n",
+ clock->dbg_name, clock->rate);
+ return 0;
+ }
+ for (level = 0; level < ARRAY_SIZE(clock->fmax); level++) {
+ if (vdd_level == level)
+ seq_printf(m, "[%lu] ", clock->fmax[level]);
+ else
+ seq_printf(m, "%lu ", clock->fmax[level]);
+ }
+ seq_printf(m, "\n");
+
+ return 0;
+}
+
+static int fmax_rates_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, fmax_rates_show, inode->i_private);
+}
+
+static const struct file_operations fmax_rates_fops = {
+ .open = fmax_rates_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
int __init clock_debug_add(struct clk *clock)
{
char temp[50], *ptr;
@@ -293,6 +327,11 @@
S_IRUGO, clk_dir, clock, &list_rates_fops))
goto error;
+ if (clock->vdd_class && !debugfs_create_file("fmax_rates",
+ S_IRUGO, clk_dir, clock, &fmax_rates_fops))
+ goto error;
+
+
return 0;
error:
debugfs_remove_recursive(clk_dir);
diff --git a/arch/arm/mach-msm/clock.c b/arch/arm/mach-msm/clock.c
index da8c3a9..f605c1f 100644
--- a/arch/arm/mach-msm/clock.c
+++ b/arch/arm/mach-msm/clock.c
@@ -33,7 +33,7 @@
static LIST_HEAD(handoff_list);
/* Find the voltage level required for a given rate. */
-static int find_vdd_level(struct clk *clk, unsigned long rate)
+int find_vdd_level(struct clk *clk, unsigned long rate)
{
int level;
diff --git a/arch/arm/mach-msm/clock.h b/arch/arm/mach-msm/clock.h
index ff0e973..d88466d 100644
--- a/arch/arm/mach-msm/clock.h
+++ b/arch/arm/mach-msm/clock.h
@@ -175,6 +175,7 @@
void msm_clock_init(struct clock_init_data *data);
int vote_vdd_level(struct clk_vdd_class *vdd_class, int level);
int unvote_vdd_level(struct clk_vdd_class *vdd_class, int level);
+int find_vdd_level(struct clk *clk, unsigned long rate);
#ifdef CONFIG_DEBUG_FS
int clock_debug_init(struct clock_init_data *data);