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Merge branch 'xgene-gpio'

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Iyappan Subramanian says:

====================
drivers: net: xgene: fix: Use GPIO to get link status

Since the link value reported by the link status register is not
reliable if no SPF module inserted, this patchset fixes the issue by
using GPIO to determine the link status when no module inserted.
====================

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Quan Nguyen <qnguyen@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2016-10-12 01:54:03 -04:00
commit b07bf5fa32
4 changed files with 24 additions and 3 deletions
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1
arch/arm64/configs/defconfig
View file

@ -257,6 +257,7 @@ CONFIG_GPIO_DWAPB=y
CONFIG_GPIO_PL061=y
CONFIG_GPIO_RCAR=y
CONFIG_GPIO_XGENE=y
CONFIG_GPIO_XGENE_SB=y
CONFIG_GPIO_PCA953X=y
CONFIG_GPIO_PCA953X_IRQ=y
CONFIG_GPIO_MAX77620=y

6
drivers/net/ethernet/apm/xgene/xgene_enet_main.c
View file

@ -1381,9 +1381,13 @@ 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)
pdata->sfp_gpio_en = false;
if (pdata->phy_mode != PHY_INTERFACE_MODE_XGMII ||
(!device_property_present(dev, "sfp-gpios") &&
!device_property_present(dev, "rxlos-gpios")))
return;
pdata->sfp_gpio_en = true;
pdata->sfp_rdy = gpiod_get(dev, "rxlos", GPIOD_IN);
if (IS_ERR(pdata->sfp_rdy))
pdata->sfp_rdy = gpiod_get(dev, "sfp", GPIOD_IN);

1
drivers/net/ethernet/apm/xgene/xgene_enet_main.h
View file

@ -219,6 +219,7 @@ struct xgene_enet_pdata {
u8 rx_delay;
bool mdio_driver;
struct gpio_desc *sfp_rdy;
bool sfp_gpio_en;
};
struct xgene_indirect_ctl {

19
drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
View file

@ -415,16 +415,31 @@ static void xgene_enet_clear(struct xgene_enet_pdata *pdata,
xgene_enet_wr_ring_if(pdata, addr, data);
}
static int xgene_enet_gpio_lookup(struct xgene_enet_pdata *pdata)
{
struct device *dev = &pdata->pdev->dev;
pdata->sfp_rdy = gpiod_get(dev, "rxlos", GPIOD_IN);
if (IS_ERR(pdata->sfp_rdy))
pdata->sfp_rdy = gpiod_get(dev, "sfp", GPIOD_IN);
if (IS_ERR(pdata->sfp_rdy))
return -ENODEV;
return 0;
}
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))
if (pdata->sfp_gpio_en && link_status &&
(!IS_ERR(pdata->sfp_rdy) || !xgene_enet_gpio_lookup(pdata)) &&
!gpiod_get_value(pdata->sfp_rdy))
link_status = 0;
if (link_status) {