[PATCH v5 11/11] ASoC: renesas: fsi: Add SPU clock control in hw_startup/shutdown

[phucduc.bui@gmail.com]

From: bui duc phuc <phucduc.bui@gmail.com>

Enable and disable the SPU clock in fsi_hw_startup() and
fsi_hw_shutdown() to ensure the clock is active while the
driver accesses hardware registers.

Suggested-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---

Changes in v5:
 - Drop spu_count and rely on the clk core for clock reference
   counting.

 sound/soc/renesas/fsi.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sound/soc/renesas/fsi.c b/sound/soc/renesas/fsi.c
index 80e87b815c1b..a1c463d73756 100644
--- a/sound/soc/renesas/fsi.c
+++ b/sound/soc/renesas/fsi.c
@@ -1560,6 +1560,11 @@ static int fsi_hw_startup(struct fsi_priv *fsi,
 			  struct device *dev)
 {
 	u32 data = 0;
+	int ret;
+	/* enable spu bus bridge clock */
+	ret = clk_enable(fsi->master->clk_spu);
+	if (ret < 0)
+		return ret;
 
 	/* clock setting */
 	if (fsi_is_clk_master(fsi))
@@ -1617,6 +1622,8 @@ static int fsi_hw_shutdown(struct fsi_priv *fsi,
 	/* stop master clock */
 	if (fsi_is_clk_master(fsi))
 		return fsi_clk_disable(dev, fsi);
+	/* stop spu bus bridge clock */
+	clk_disable(fsi->master->clk_spu);
 
 	return 0;
 }
-- 
2.43.0