diff options
Diffstat (limited to 'target/linux/lantiq/patches-3.7/0126-lantiq_etop-Change-MDIO-clock.patch')
| -rw-r--r-- | target/linux/lantiq/patches-3.7/0126-lantiq_etop-Change-MDIO-clock.patch | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-3.7/0126-lantiq_etop-Change-MDIO-clock.patch b/target/linux/lantiq/patches-3.7/0126-lantiq_etop-Change-MDIO-clock.patch new file mode 100644 index 0000000..79fdd2b --- /dev/null +++ b/target/linux/lantiq/patches-3.7/0126-lantiq_etop-Change-MDIO-clock.patch @@ -0,0 +1,47 @@ +From 2f9f0ec1ff013934a86a7303c9194f6dc05620c3 Mon Sep 17 00:00:00 2001 +From: Sebastian Mayr <sebastian.mayr@student.uibk.ac.at> +Date: Thu, 20 Dec 2012 18:34:45 +0100 +Subject: [PATCH 1/2] lantiq_etop: Change MDIO clock + +This patch sets the MDC clock to 2.5MHz which fixes the MDIO communication +with the ar8316 switch. +--- + drivers/net/ethernet/lantiq_etop.c | 8 ++++++++ + 1 file changed, 8 insertions(+) + +diff --git a/drivers/net/ethernet/lantiq_etop.c b/drivers/net/ethernet/lantiq_etop.c +index e695f71..fc963f6 100644 +--- a/drivers/net/ethernet/lantiq_etop.c ++++ b/drivers/net/ethernet/lantiq_etop.c +@@ -83,6 +83,7 @@ + #define LTQ_GBIT_PMAC_HD_CTL 0x8c + #define LTQ_GBIT_P0_CTL 0x4 + #define LTQ_GBIT_PMAC_RX_IPG 0xa8 ++#define LTQ_GBIT_RGMII_CTL 0x78 + + #define PMAC_HD_CTL_AS (1 << 19) + #define PMAC_HD_CTL_RXSH (1 << 22) +@@ -92,6 +93,10 @@ + /* Disable MDIO auto polling (0=disable, 1=enable) */ + #define PX_CTL_DMDIO 0x00400000 + ++/* MDC clock divider, clock = 25MHz/((MDC_CLOCK + 1) * 2) */ ++#define MDC_CLOCK_MASK 0xff000000 ++#define MDC_CLOCK_OFFSET 24 ++ + /* register information for the gbit's MDIO bus */ + #define MDIO_XR9_REQUEST 0x00008000 + #define MDIO_XR9_READ 0x00000800 +@@ -329,6 +334,9 @@ ltq_etop_gbit_init(struct net_device *dev) + /* Due to traffic halt when burst length 8, + replace default IPG value with 0x3B */ + ltq_gbit_w32(0x3B, LTQ_GBIT_PMAC_RX_IPG); ++ /* set mdc clock to 2.5 MHz */ ++ ltq_gbit_w32_mask(MDC_CLOCK_MASK, 4 << MDC_CLOCK_OFFSET, ++ LTQ_GBIT_RGMII_CTL); + } + + static int +-- +1.7.11.7 + |