The updated binding provides a way to set clock-ID and direction
parameters for DAI drivers set_sysclk() call back.
Signed-off-by: Jyri Sarha <jsa...@ti.com>
---
I proposed something similar about a year ago, but Mark rejected that
at the time. This RFC is to start that discussion again. This time
before I do any code changes.
Best regards,
Jyri
Documentation/devicetree/bindings/sound/simple-card.txt | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/sound/simple-card.txt
b/Documentation/devicetree/bindings/sound/simple-card.txt
index cf3979e..d10bf2d 100644
--- a/Documentation/devicetree/bindings/sound/simple-card.txt
+++ b/Documentation/devicetree/bindings/sound/simple-card.txt
@@ -76,6 +76,7 @@ Optional CPU/CODEC subnodes properties:
- dai-tdm-slot-num : Please refer to tdm-slot.txt.
- dai-tdm-slot-width : Please refer to tdm-slot.txt.
- clocks / system-clock-frequency : specify subnode's clock if needed.
+
it can be specified via "clocks" if
system has
clock node (= common clock), or
"system-clock-frequency"
(if system doens't support common
clock)
@@ -83,7 +84,21 @@ Optional CPU/CODEC subnodes properties:
enabled with clk_prepare_enable()
in dai startup() and disabled with
clk_disable_unprepare() in dai
- shutdown().
+ shutdown(). "system-clock-frequency"
+ can also be an array if more than one
+ clock is described.
+- clock-ids : An array of clock ID integers,
+ preferrably defined in DT header.
+ Each entry corresponds to the same
+ index postion first in "clocks" and
+ after the end of clocks array to
+ "system-clock-frequency" array.
+- clock-dirs : An array of integers describing
+ clock directions: CLK_IN (= 0) or
+ OUT (= 1). Entries in the array
+ refer to clocks in the same way as
+ in clock-ids property.
+
Example 1 - single DAI link:
--
1.9.1
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