From: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
AUDIO-CLKOUTn can synchronizes with L/R clock, and Salvator board
needs it. Otherwise, specific frequency sound will be noisy.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
.../devicetree/bindings/sound/renesas,rsnd.txt | 2 ++
sound/soc/sh/rcar/adg.c | 18 ++++++++++++++++++
2 files changed, 20 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/renesas,rsnd.txt b/Documentation/devicetree/bindings/sound/renesas,rsnd.txt
index c7b29df..065d9c8 100644
--- a/Documentation/devicetree/bindings/sound/renesas,rsnd.txt
+++ b/Documentation/devicetree/bindings/sound/renesas,rsnd.txt
@@ -373,6 +373,8 @@ Optional properties:
- #clock-cells : it must be 0 if your system has audio_clkout
it must be 1 if your system has audio_clkout0/1/2/3
- clock-frequency : for all audio_clkout0/1/2/3
+- clkout-lr-synchronous : boolean property. it indicates that audio_clkoutn
+ synchronizes with lr-clock.
SSI subnode properties:
- interrupts : Should contain SSI interrupt for PIO transfer
diff --git a/sound/soc/sh/rcar/adg.c b/sound/soc/sh/rcar/adg.c
index c4c51a4..1586271 100644
--- a/sound/soc/sh/rcar/adg.c
+++ b/sound/soc/sh/rcar/adg.c
@@ -33,11 +33,15 @@ struct rsnd_adg {
struct clk *clkout[CLKOUTMAX];
struct clk_onecell_data onecell;
struct rsnd_mod mod;
+ u32 flags;
int rbga_rate_for_441khz; /* RBGA */
int rbgb_rate_for_48khz; /* RBGB */
};
+#define LRCLK_SYNC (1 << 0)
+#define adg_mode_flags(adg) (adg->flags)
+
#define for_each_rsnd_clk(pos, adg, i) \
for (i = 0; \
(i < CLKMAX) && \
@@ -355,6 +359,16 @@ found_clock:
rsnd_adg_set_ssi_clk(ssi_mod, data);
+ if (adg_mode_flags(adg) & LRCLK_SYNC) {
+ struct rsnd_mod *adg_mod = rsnd_mod_get(adg);
+ u32 ckr = 0;
+
+ if (0 == (rate % 8000))
+ ckr = 0x80000000;
+
+ rsnd_mod_bset(adg_mod, SSICKR, 0x80000000, ckr);
+ }
+
dev_dbg(dev, "ADG: %s[%d] selects 0x%x for %d\n",
rsnd_mod_name(ssi_mod), rsnd_mod_id(ssi_mod),
data, rate);
@@ -532,6 +546,7 @@ int rsnd_adg_probe(struct rsnd_priv *priv)
{
struct rsnd_adg *adg;
struct device *dev = rsnd_priv_to_dev(priv);
+ struct device_node *np = dev->of_node;
adg = devm_kzalloc(dev, sizeof(*adg), GFP_KERNEL);
if (!adg) {
@@ -545,6 +560,9 @@ int rsnd_adg_probe(struct rsnd_priv *priv)
rsnd_adg_get_clkin(priv, adg);
rsnd_adg_get_clkout(priv, adg);
+ if (of_get_property(np, "clkout-lr-synchronous", NULL))
+ adg->flags = LRCLK_SYNC;
+
priv->adg = adg;
return 0;
--
1.9.1
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