davinci: make /proc/davinci_clocks display multi-rooted clock tree

This patch modifies clock dump to take care of
clock tress rooted at multiple oscillators.
Current code assumes the entire tree is rooted
on a single oscillator. When using off-chip
clock synthesizers, some of the clocks can
be obtained from a different on-board oscillator.

Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

1 files changed, 7 insertions, 4 deletions

diff --git a/arch/arm/mach-davinci/clock.c b/arch/arm/mach-davinci/clock.c
index 0fa68c558320..2c27caefa62e 100644
--- a/arch/arm/mach-davinci/clock.c
+++ b/arch/arm/mach-davinci/clock.c
@@ -516,12 +516,15 @@ dump_clock(struct seq_file *s, unsigned nest, struct clk *parent)
 
 static int davinci_ck_show(struct seq_file *m, void *v)
 {
-        /* Show clock tree; we know the main oscillator is first.
-         * We trust nonzero usecounts equate to PSC enables...
+        struct clk *clk;
+
+        /*
+         * Show clock tree; We trust nonzero usecounts equate to PSC enables...
          */
         mutex_lock(&clocks_mutex);
-        if (!list_empty(&clocks))
-                dump_clock(m, 0, list_first_entry(&clocks, struct clk, node));
+        list_for_each_entry(clk, &clocks, node)
+                if (!clk->parent)
+                        dump_clock(m, 0, clk);
         mutex_unlock(&clocks_mutex);
 
         return 0;