net: tsec: Fix Marvell 88E1121R phy init
This patch tries to ensure that phy interrupt pin
won't be asserted after booting. We experienced
following issues with current 88E1121R phy init:
Marvell 88E1121R phy can be hardware-configured
to share MDC/MDIO and interrupt pins for both ports
P0 and P1 (e.g. as configured on socrates board).
Port 0 interrupt pin will be shared by both ports
in such configuration. After booting Linux and
configuring eth0 interface, port 0 phy interrupts
are enabled. After rebooting without proper eth0
interface shutdown port 0 phy interrupts remain
enabled so any change on port 0 (link status, etc.)
cause assertion of the interrupt. Now booting Linux
and configuring eth1 interface will cause permanent
phy interrupt storm as the registered phy 1 interrupt
handler doesn't acknowledge phy 0 interrupts. This
of course should be fixed in Linux driver too.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Acked-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
diff --git a/drivers/net/tsec.c b/drivers/net/tsec.c
index d7da081..fbc9a6d 100644
--- a/drivers/net/tsec.c
+++ b/drivers/net/tsec.c
@@ -1196,6 +1196,9 @@
{MIIM_88E1121_PHY_LED_CTRL, miim_read,
&mii_88E1121_set_led},
{MIIM_CONTROL, MIIM_CONTROL_INIT, &mii_cr_init},
+ /* Disable IRQs and de-assert interrupt */
+ {MIIM_88E1121_PHY_IRQ_EN, 0, NULL},
+ {MIIM_88E1121_PHY_IRQ_STATUS, miim_read, NULL},
{miim_end,}
},
(struct phy_cmd[]){ /* startup */