[PATCH AUTOSEL for 4.9 064/219] ASoC: rcar: ssi: don't set SSICR.CKDV = 000 with SSIWSR.CONT

Sasha Levin
2018-03-03T23:55:40Z

From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

[ Upstream commit 6b8530cc056efd4a11b034ca5b1e9f7e9563f553 ]

R-Car Datasheet is indicating "SSICR.CKDV = 000 is invalid when
SSIWSR.WS_MODE = 1 or SSIWSR.CONT = 1".
Current driver will set CONT, thus, we shouldn't use CKDV = 000.
This patch fixup it.

Reported-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
sound/soc/sh/rcar/ssi.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c
index a9a43acce30e..fefa6ad5de8b 100644
--- a/sound/soc/sh/rcar/ssi.c
+++ b/sound/soc/sh/rcar/ssi.c
@@ -232,6 +232,15 @@ static int rsnd_ssi_master_clk_start(struct rsnd_mod *mod,
*/
for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) {

+ /*
+ * It will set SSIWSR.CONT here, but SSICR.CKDV = 000
+ * with it is not allowed. (SSIWSR.WS_MODE with
+ * SSICR.CKDV = 000 is not allowed either).
+ * Skip it. See SSICR.CKDV
+ */
+ if (j == 0)
+ continue;
+
/*
* this driver is assuming that
* system word is 32bit x chan
--
2.14.1