[PATCH v3 08/10] ASoC: renesas: fsi: add fsi_clk_prepare/unprepare()

[phucduc.bui@gmail.com]

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

Add helper functions for preparing and unpreparing FSI clocks.

These helpers centralize clock prepare/unprepare handling and
will be used by subsequent patches to move clock management
into sleepable contexts.

Suggested-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 sound/soc/renesas/fsi.c | 66 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)

diff --git a/sound/soc/renesas/fsi.c b/sound/soc/renesas/fsi.c
index 8c46d6806958..b93809b5da15 100644
--- a/sound/soc/renesas/fsi.c
+++ b/sound/soc/renesas/fsi.c
@@ -732,6 +732,72 @@ static int fsi_clk_is_valid(struct fsi_priv *fsi)
 		fsi->clock.rate;
 }
 
+static int fsi_clk_prepare(struct fsi_priv *fsi)
+{
+	struct fsi_clk *clock = &fsi->clock;
+	struct clk *spu = fsi->master->clk_spu;
+	struct clk *xck = clock->xck;
+	struct clk *ick = clock->ick;
+	struct clk *div = clock->div;
+	int ret;
+
+	if (!IS_ERR_OR_NULL(spu) && fsi->master->spu_count == 0) {
+		ret = clk_prepare(spu);
+		if (ret)
+			return ret;
+	}
+
+	if (!IS_ERR_OR_NULL(xck)) {
+		ret = clk_prepare(xck);
+		if (ret)
+			goto err_spu;
+	}
+
+	if (!IS_ERR_OR_NULL(ick)) {
+		ret = clk_prepare(ick);
+		if (ret)
+			goto err_xck;
+	}
+
+	if (!IS_ERR_OR_NULL(div)) {
+		ret = clk_prepare(div);
+		if (ret)
+			goto err_ick;
+	}
+
+	return 0;
+
+err_ick:
+	clk_unprepare(ick);
+err_xck:
+	clk_unprepare(xck);
+err_spu:
+	clk_unprepare(spu);
+
+	return ret;
+}
+
+static void fsi_clk_unprepare(struct fsi_priv *fsi)
+{
+	struct fsi_clk *clock = &fsi->clock;
+	struct clk *spu = fsi->master->clk_spu;
+	struct clk *xck = clock->xck;
+	struct clk *ick = clock->ick;
+	struct clk *div = clock->div;
+
+	if (!IS_ERR_OR_NULL(div))
+		clk_unprepare(div);
+
+	if (!IS_ERR_OR_NULL(ick))
+		clk_unprepare(ick);
+
+	if (!IS_ERR_OR_NULL(xck))
+		clk_unprepare(xck);
+
+	if (!IS_ERR_OR_NULL(spu) && fsi->master->spu_count == 0)
+		clk_unprepare(spu);
+}
+
 static int fsi_clk_enable(struct device *dev,
 			  struct fsi_priv *fsi)
 {
-- 
2.43.0