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authorDavid Bauer <mail@david-bauer.net>2019-10-24 15:13:24 +0200
committerDavid Bauer <mail@david-bauer.net>2019-10-27 17:56:23 +0100
commit6f2e1b7485f0460b09168aef57931fe0ddedb884 (patch)
tree1580fc6608960f498020144c9fd5b88ea2b9346c /target/linux/ath79/patches-4.19/0038-at803x-disable-delays.patch
parent641a93f0f226aa1b4e27bc6f1fc36f9fe63a11a0 (diff)
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ath79: disable delays on AT803X config init
Until upstream commit 6d4cd041f0af("net: phy: at803x: disable delay only for RGMII mode"), delays were not disabled on driver probe for the Atheros AR803x PHYs, although the RX delay is enabled on soft and hard reset. In addition, the TX delay setting is retained on soft-reset. This patch disables both delays on config init to align the behavior with kernel 5.1 and higher. It can be safely dropped with kernel 5.1. Signed-off-by: David Bauer <mail@david-bauer.net>
Diffstat (limited to 'target/linux/ath79/patches-4.19/0038-at803x-disable-delays.patch')
-rw-r--r--target/linux/ath79/patches-4.19/0038-at803x-disable-delays.patch27
1 files changed, 27 insertions, 0 deletions
diff --git a/target/linux/ath79/patches-4.19/0038-at803x-disable-delays.patch b/target/linux/ath79/patches-4.19/0038-at803x-disable-delays.patch
new file mode 100644
index 0000000000..56325a831e
--- /dev/null
+++ b/target/linux/ath79/patches-4.19/0038-at803x-disable-delays.patch
@@ -0,0 +1,27 @@
+Until upstream commit 6d4cd041f0af("net: phy: at803x: disable delay
+only for RGMII mode"), delays were not disabled on driver probe
+for the Atheros AR803x PHYs, although the RX delay is enabled on
+soft and hard reset.
+
+In addition, the TX delay setting is retained on soft-reset.
+
+This patch disables both delays on config init to align the behavior
+with kernel 5.1 and higher. It can be safely dropped with kernel 5.1.
+
+--- a/drivers/net/phy/at803x.c
++++ b/drivers/net/phy/at803x.c
+@@ -295,6 +295,14 @@ static int at803x_config_init(struct phy
+ if (ret < 0)
+ return ret;
+
++ /* Disable RX delay */
++ at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_0,
++ AT803X_DEBUG_RX_CLK_DLY_EN, 0);
++
++ /* Disable TX delay */
++ at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_5,
++ AT803X_DEBUG_TX_CLK_DLY_EN, 0);
++
+ if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID ||
+ phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) {
+ ret = at803x_enable_rx_delay(phydev);