ASoC: simple-card: Add device's module clock selection.

Try to get the device's module clock if the dt has no clocks and
system-clock-frequency properties.

Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 18 insertions, 3 deletions

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 3ba65bb63439..58c217e403ae 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -90,14 +90,29 @@ asoc_simple_card_sub_parse_of(struct device_node *np,
          * dai->sysclk come from
          *  "clocks = <&xxx>" (if system has common clock)
          *  or "system-clock-frequency = <xxx>"
+         *  or device's module clock.
          */
-        clk = of_clk_get(np, 0);
-        if (IS_ERR(clk))
+        if (of_property_read_bool(np, "clocks")) {
+                clk = of_clk_get(np, 0);
+                if (IS_ERR(clk)) {
+                        ret = PTR_ERR(clk);
+                        goto parse_error;
+                }
+
+                dai->sysclk = clk_get_rate(clk);
+        } else if (of_property_read_bool(np, "system-clock-frequency")) {
                 of_property_read_u32(np,
                                      "system-clock-frequency",
                                      &dai->sysclk);
-        else
+        } else {
+                clk = of_clk_get(*node, 0);
+                if (IS_ERR(clk)) {
+                        ret = PTR_ERR(clk);
+                        goto parse_error;
+                }
+
                 dai->sysclk = clk_get_rate(clk);
+        }
 
         ret = 0;