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_main.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 'drivers/net/ethernet/apm/xgene/xgene_enet_main.c')
| -rw-r--r-- | drivers/net/ethernet/apm/xgene/xgene_enet_main.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c index 01a9aaf49669..b8b9495e6da6 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c @@ -19,6 +19,7 @@ * along with this program. If not, see <http://www.gnu.org/licenses/>. */ +#include <linux/gpio.h> #include "xgene_enet_main.h" #include "xgene_enet_hw.h" #include "xgene_enet_sgmac.h" @@ -1320,6 +1321,18 @@ static int xgene_enet_check_phy_handle(struct xgene_enet_pdata *pdata) return 0; } +static void xgene_enet_gpiod_get(struct xgene_enet_pdata *pdata) +{ + struct device *dev = &pdata->pdev->dev; + + if (pdata->phy_mode != PHY_INTERFACE_MODE_XGMII) + return; + + pdata->sfp_rdy = gpiod_get(dev, "rxlos", GPIOD_IN); + if (IS_ERR(pdata->sfp_rdy)) + pdata->sfp_rdy = gpiod_get(dev, "sfp", GPIOD_IN); +} + static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata) { struct platform_device *pdev; @@ -1409,6 +1422,8 @@ static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata) if (ret) return ret; + xgene_enet_gpiod_get(pdata); + pdata->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(pdata->clk)) { /* Firmware may have set up the clock already. */ |