From: Ansuel Smith <ansuelsmth@gmail.com>
To: Florian Fainelli <f.fainelli@gmail.com>
Cc: Ansuel Smith <ansuelsmth@gmail.com>, Andrew Lunn <andrew@lunn.ch>,
Heiner Kallweit <hkallweit1@gmail.com>,
Russell King <linux@armlinux.org.uk>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [RFC PATCH net-next v3 03/20] net: mdio: ipq8064: enlarge sleep after read/write operation
Date: Wed, 5 May 2021 00:28:57 +0200 [thread overview]
Message-ID: <20210504222915.17206-3-ansuelsmth@gmail.com> (raw)
In-Reply-To: <20210504222915.17206-1-ansuelsmth@gmail.com>
With the use of the qca8k dsa driver, some problem arised related to
port status detection. With a load on a specific port (for example a
simple speed test), the driver starts to behave in a strange way and
garbage data is produced. To address this, enlarge the sleep delay and
address a bug for the reg offset 31 that require additional delay for
this specific reg.
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
---
drivers/net/mdio/mdio-ipq8064.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/net/mdio/mdio-ipq8064.c b/drivers/net/mdio/mdio-ipq8064.c
index 9862745d1cee..a3f7f9de12b6 100644
--- a/drivers/net/mdio/mdio-ipq8064.c
+++ b/drivers/net/mdio/mdio-ipq8064.c
@@ -65,7 +65,7 @@ ipq8064_mdio_read(struct mii_bus *bus, int phy_addr, int reg_offset)
((reg_offset << MII_REG_SHIFT) & MII_REG_MASK);
regmap_write(priv->base, MII_ADDR_REG_ADDR, miiaddr);
- usleep_range(8, 10);
+ usleep_range(10, 13);
err = ipq8064_mdio_wait_busy(priv);
if (err)
@@ -91,7 +91,14 @@ ipq8064_mdio_write(struct mii_bus *bus, int phy_addr, int reg_offset, u16 data)
((reg_offset << MII_REG_SHIFT) & MII_REG_MASK);
regmap_write(priv->base, MII_ADDR_REG_ADDR, miiaddr);
- usleep_range(8, 10);
+
+ /* For the specific reg 31 extra time is needed or the next
+ * read will produce garbage data.
+ */
+ if (reg_offset == 31)
+ usleep_range(30, 43);
+ else
+ usleep_range(10, 13);
return ipq8064_mdio_wait_busy(priv);
}
--
2.30.2
next prev parent reply other threads:[~2021-05-04 22:29 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-04 22:28 [RFC PATCH net-next v3 01/20] net: mdio: ipq8064: clean whitespaces in define Ansuel Smith
2021-05-04 22:28 ` [RFC PATCH net-next v3 02/20] net: mdio: ipq8064: add regmap config to disable REGCACHE Ansuel Smith
2021-05-04 22:28 ` Ansuel Smith [this message]
2021-05-04 22:28 ` [RFC PATCH net-next v3 04/20] net: dsa: qca8k: handle qca8k_set_page errors Ansuel Smith
2021-05-05 0:25 ` Andrew Lunn
2021-05-05 0:26 ` Andrew Lunn
2021-05-04 22:28 ` [RFC PATCH net-next v3 05/20] net: dsa: qca8k: handle error with qca8k_read operation Ansuel Smith
2021-05-05 0:36 ` Andrew Lunn
2021-05-05 0:44 ` Ansuel Smith
2021-05-04 22:29 ` [RFC PATCH net-next v3 06/20] net: dsa: qca8k: handle error with qca8k_write operation Ansuel Smith
2021-05-05 0:41 ` Andrew Lunn
2021-05-05 0:47 ` Ansuel Smith
2021-05-06 11:19 ` Vladimir Oltean
2021-05-04 22:29 ` [RFC PATCH net-next v3 07/20] net: dsa: qca8k: handle error with qca8k_rmw operation Ansuel Smith
2021-05-05 0:46 ` Andrew Lunn
2021-05-05 0:51 ` Ansuel Smith
2021-05-04 22:29 ` [RFC PATCH net-next v3 08/20] net: dsa: qca8k: add support for qca8327 switch Ansuel Smith
2021-05-05 0:48 ` Andrew Lunn
2021-05-06 11:20 ` Vladimir Oltean
2021-05-04 22:29 ` [RFC PATCH net-next v3 09/20] devicetree: net: dsa: qca8k: Document new compatible qca8327 Ansuel Smith
2021-05-05 0:48 ` Andrew Lunn
2021-05-06 21:07 ` Rob Herring
2021-05-04 22:29 ` [RFC PATCH net-next v3 10/20] net: dsa: qca8k: add priority tweak to qca8337 switch Ansuel Smith
2021-05-05 0:53 ` Andrew Lunn
2021-05-06 11:16 ` Vladimir Oltean
2021-05-04 22:29 ` [RFC PATCH net-next v3 11/20] net: dsa: qca8k: add GLOBAL_FC settings needed for qca8327 Ansuel Smith
2021-05-05 0:54 ` Andrew Lunn
2021-05-04 22:29 ` [RFC PATCH net-next v3 12/20] net: dsa: qca8k: add support for switch rev Ansuel Smith
2021-05-04 22:29 ` [RFC PATCH net-next v3 13/20] net: dsa: qca8k: make rgmii delay configurable Ansuel Smith
2021-05-05 1:00 ` Andrew Lunn
2021-05-05 1:07 ` Ansuel Smith
2021-05-06 11:10 ` Vladimir Oltean
2021-05-06 21:53 ` Ansuel Smith
2021-05-07 8:51 ` Vladimir Oltean
2021-05-04 22:29 ` [RFC PATCH net-next v3 14/20] net: dsa: qca8k: clear MASTER_EN after phy read/write Ansuel Smith
2021-05-04 22:29 ` [RFC PATCH net-next v3 15/20] net: dsa: qca8k: dsa: qca8k: protect MASTER busy_wait with mdio mutex Ansuel Smith
2021-05-05 1:04 ` Andrew Lunn
2021-05-04 22:29 ` [RFC PATCH net-next v3 16/20] net: dsa: qca8k: enlarge mdio delay and timeout Ansuel Smith
2021-05-06 11:27 ` Vladimir Oltean
2021-05-04 22:29 ` [RFC PATCH net-next v3 17/20] net: phy: phylink: permit to pass dev_flags to phylink_connect_phy Ansuel Smith
2021-05-04 22:33 ` Florian Fainelli
2021-05-05 0:35 ` Ansuel Smith
2021-05-04 22:29 ` [RFC PATCH net-next v3 18/20] net: dsa: slave: pass dev_flags also to internal PHY Ansuel Smith
2021-05-04 22:29 ` [RFC PATCH net-next v3 19/20] net: dsa: qca8k: pass switch_revision info to phy dev_flags Ansuel Smith
2021-05-06 11:24 ` Vladimir Oltean
2021-05-07 23:26 ` Ansuel Smith
2021-05-07 23:33 ` Russell King - ARM Linux admin
2021-05-07 23:51 ` Ansuel Smith
2021-05-08 17:31 ` Andrew Lunn
2021-05-08 18:26 ` Vladimir Oltean
2021-05-08 19:39 ` Russell King - ARM Linux admin
2021-05-08 20:55 ` Andrew Lunn
2021-05-07 9:44 ` Russell King - ARM Linux admin
2021-05-04 22:29 ` [RFC PATCH net-next v3 20/20] net: phy: add qca8k driver for qca8k switch internal PHY Ansuel Smith
2021-05-05 1:11 ` Andrew Lunn
2021-05-05 1:17 ` Ansuel Smith
2021-05-05 12:06 ` Andrew Lunn
2021-05-05 0:17 ` [RFC PATCH net-next v3 01/20] net: mdio: ipq8064: clean whitespaces in define Andrew Lunn
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