Received-SPF: pass (google.com: domain of linux-kernel+bounces-100705-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.199.223 as permitted sender) client-ip=147.75.199.223;
From: Justin Swartz <justin.swartz@risingedge.co.za>
To: =?UTF-8?q?Ar=C4=B1n=C3=A7=20=C3=9CNAL?= <arinc.unal@arinc9.com>,
	Daniel Golle <daniel@makrotopia.org>,
	DENG Qingfang <dqfext@gmail.com>,
	Sean Wang <sean.wang@mediatek.com>,
	Andrew Lunn <andrew@lunn.ch>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Vladimir Oltean <olteanv@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>,
	Paolo Abeni <pabeni@redhat.com>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Cc: Justin Swartz <justin.swartz@risingedge.co.za>,
	netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org
Subject: [PATCH] net: dsa: mt7530: increase reset hold time
Date: Tue, 12 Mar 2024 21:21:16 +0200
Message-Id: <20240312192117.7789-1-justin.swartz@risingedge.co.za>
In-Reply-To: <f594a72a91d12f1d027a06962caa9750@risingedge.co.za>
References: <f594a72a91d12f1d027a06962caa9750@risingedge.co.za>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

Increase the MT7530 reset hold period from 1000-1100 usec
to 5000-5100 usec.

This should reduce the likelihood of an incorrect external
crystal frequency selection which may occur when reset is
deasserted too early under certain link conditions.

Signed-off-by: Justin Swartz <justin.swartz@risingedge.co.za>
---
 drivers/net/dsa/mt7530.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 3c1f65759..5e9e1381a 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -2243,11 +2243,11 @@ mt7530_setup(struct dsa_switch *ds)
 	 */
 	if (priv->mcm) {
 		reset_control_assert(priv->rstc);
-		usleep_range(1000, 1100);
+		usleep_range(5000, 5100);
 		reset_control_deassert(priv->rstc);
 	} else {
 		gpiod_set_value_cansleep(priv->reset, 0);
-		usleep_range(1000, 1100);
+		usleep_range(5000, 5100);
 		gpiod_set_value_cansleep(priv->reset, 1);
 	}
 
--