[PATCH net-next v4 08/13] net: macb: clean up tsu clk rate acquisition

[Conor Dooley <conor@kernel.org>]

From: Conor Dooley <conor.dooley@microchip.com>

tsu_clk is grabbed during probe, so doesn't need to be re-grabbed here.
pclk is mandatory, probe will fail if it is err/NULL, so there's no need
to check it here or have a !pclk 3rd arm. Simplify gem_get_tsu_rate() to
account for these facts.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
 drivers/net/ethernet/cadence/macb_main.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 6b37598ac57cd..38e75c2e097bf 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -3527,16 +3527,14 @@ static unsigned int gem_get_tsu_rate(struct macb *bp)
 	struct clk *tsu_clk;
 	unsigned int tsu_rate;
 
-	tsu_clk = devm_clk_get(&bp->pdev->dev, "tsu_clk");
-	if (!IS_ERR(tsu_clk))
-		tsu_rate = clk_get_rate(tsu_clk);
-	/* try pclk instead */
-	else if (!IS_ERR(bp->pclk)) {
+	if (!IS_ERR_OR_NULL(bp->tsu_clk)) {
+		tsu_rate = clk_get_rate(bp->tsu_clk);
+	} else {
 		tsu_clk = bp->pclk;
 		tsu_rate = clk_get_rate(tsu_clk);
 		dev_warn(&bp->pdev->dev, "devicetree missing tsu_clk, using pclk as fallback\n");
-	} else
-		return -ENOTSUPP;
+	}
+
 	return tsu_rate;
 }
 
-- 
2.51.0