diff options
| author |   Iyappan Subramanian <isubramanian@apm.com> | 2016-08-12 22:05:44 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-08-13 11:48:53 -0700 |
| commit | 27ecf87c8a9d6152203ff5feb74535abd48e9ad3 (patch) | |
| tree | 4b4d62c8eeb7b99b0c843a4ce846ff02818b416f /drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c | |
| parent | drivers: net: xgene: XFI PCS reset when link is down (diff) | |
| download | linux-dev-27ecf87c8a9d6152203ff5feb74535abd48e9ad3.tar.xz linux-dev-27ecf87c8a9d6152203ff5feb74535abd48e9ad3.zip | |
drivers: net: xgene: Poll link status via GPIO
When 10GbE SFP+ module is not plugged in or cable is not connected,
the link status register does not report the proper state due
to floating signal. This patch checks the module present status via an
GPIO to determine whether to ignore the link status register and report
link down.
Signed-off-by: Quan Nguyen <qnguyen@apm.com>
Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Tested-by: Fushen Chen <fchen@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c index 4087dba6ea84..d672e71b5a50 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c @@ -18,6 +18,8 @@ * along with this program. If not, see <http://www.gnu.org/licenses/>. */ +#include <linux/of_gpio.h> +#include <linux/gpio.h> #include "xgene_enet_main.h" #include "xgene_enet_hw.h" #include "xgene_enet_xgmac.h" @@ -399,10 +401,14 @@ static void xgene_enet_link_state(struct work_struct *work) { struct xgene_enet_pdata *pdata = container_of(to_delayed_work(work), struct xgene_enet_pdata, link_work); + struct gpio_desc *sfp_rdy = pdata->sfp_rdy; struct net_device *ndev = pdata->ndev; u32 link_status, poll_interval; link_status = xgene_enet_link_status(pdata); + if (link_status && !IS_ERR(sfp_rdy) && !gpiod_get_value(sfp_rdy)) + link_status = 0; + if (link_status) { if (!netif_carrier_ok(ndev)) { netif_carrier_on(ndev); |