netdev - [RFC PATCH 10/10] net: dsa: b53: ensure BCM5325 PHYs are enabled

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Message-Id: <20250531101308.155757-11-noltari@gmail.com>
Date: Sat, 31 May 2025 12:13:08 +0200
From: Álvaro Fernández Rojas <noltari@...il.com>
To: jonas.gorski@...il.com,
	florian.fainelli@...adcom.com,
	andrew@...n.ch,
	olteanv@...il.com,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	vivien.didelot@...il.com,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	dgcbueu@...il.com
Cc: Álvaro Fernández Rojas <noltari@...il.com>
Subject: [RFC PATCH 10/10] net: dsa: b53: ensure BCM5325 PHYs are enabled

According to the datasheet, BCM5325 uses B53_PD_MODE_CTRL_25 register to
disable clocking to individual PHYs.

Signed-off-by: Álvaro Fernández Rojas <noltari@...il.com>
---
 drivers/net/dsa/b53/b53_common.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index 802020eaea44..7b786d0d14cd 100644
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -1299,6 +1299,9 @@ static int b53_setup(struct dsa_switch *ds)
 
 	b53_reset_mib(dev);
 
+	if (is5325(dev))
+		b53_write8(dev, B53_CTRL_PAGE, B53_PD_MODE_CTRL_25, 0);
+
 	ret = b53_apply_config(dev);
 	if (ret) {
 		dev_err(ds->dev, "failed to apply configuration\n");
-- 
2.39.5