[PATCH v4 1/4] fu540: prci: add request and free clock handlers

[Sagar Shrikant Kadam]

Add clk_request handler to check if a valid clock is requested.
Here clk_free handler is added for debug purpose which will display
details of clock passed to clk_free.

Signed-off-by: Sagar Shrikant Kadam <sagar.kadam at sifive.com>
Reviewed-by: Pragnesh Patel <Pragnesh.patel at sifive.com>
---
 drivers/clk/sifive/fu540-prci.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/clk/sifive/fu540-prci.c b/drivers/clk/sifive/fu540-prci.c
index fe6e0d4..9a9ff6b 100644
--- a/drivers/clk/sifive/fu540-prci.c
+++ b/drivers/clk/sifive/fu540-prci.c
@@ -686,6 +686,25 @@ static ulong sifive_fu540_prci_set_rate(struct clk *clk, ulong rate)
 	return rate;
 }
 
+static int sifive_fu540_prci_clk_request(struct clk *clk)
+{
+	debug("%s(clk=%p) (dev=%p, id=%lu)\n", __func__, clk, clk->dev,
+	      clk->id);
+
+	if (clk->id >= ARRAY_SIZE(__prci_init_clocks))
+		return -EINVAL;
+
+	return 0;
+}
+
+static int sifive_fu540_prci_clk_free(struct clk *clk)
+{
+	debug("%s(clk=%p) (dev=%p, id=%lu)\n", __func__, clk, clk->dev,
+	      clk->id);
+
+	return 0;
+}
+
 static int sifive_fu540_prci_enable(struct clk *clk)
 {
 	struct __prci_clock *pc;
@@ -755,6 +774,8 @@ static struct clk_ops sifive_fu540_prci_ops = {
 	.get_rate = sifive_fu540_prci_get_rate,
 	.enable = sifive_fu540_prci_enable,
 	.disable = sifive_fu540_prci_disable,
+	.request  = sifive_fu540_prci_clk_request,
+	.rfree	  = sifive_fu540_prci_clk_free,
 };
 
 static const struct udevice_id sifive_fu540_prci_ids[] = {
-- 
2.7.4