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net: stmmac: dwmac-rk: keep the PHY up for WoL

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When suspending the machine, do not shutdown the external PHY by cutting
its regulator in the mac platform driver suspend code if Wake-on-Lan is enabled,
else it cannot wake us up.
In order to do this, split the suspend/resume callbacks from the
init/exit callbacks, so we can condition the power-down on the lack of
need to wake-up from the LAN but do it unconditionally when unloading the
module.

Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vincent Palatin 2016-06-15 11:32:22 -07:00 committed by David S. Miller
parent cecbc5563a
commit 229666c14c
1 changed files with 43 additions and 5 deletions
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48
drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
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@ -46,6 +46,7 @@ struct rk_priv_data {
struct platform_device *pdev;
int phy_iface;
struct regulator *regulator;
bool suspended;
const struct rk_gmac_ops *ops;
bool clk_enabled;
@ -529,9 +530,8 @@ static struct rk_priv_data *rk_gmac_setup(struct platform_device *pdev,
return bsp_priv;
}
static int rk_gmac_init(struct platform_device *pdev, void *priv)
static int rk_gmac_powerup(struct rk_priv_data *bsp_priv)
{
struct rk_priv_data *bsp_priv = priv;
int ret;
ret = phy_power_on(bsp_priv, true);
@ -545,14 +545,50 @@ static int rk_gmac_init(struct platform_device *pdev, void *priv)
return 0;
}
static void rk_gmac_exit(struct platform_device *pdev, void *priv)
static void rk_gmac_powerdown(struct rk_priv_data *gmac)
{
struct rk_priv_data *gmac = priv;
phy_power_on(gmac, false);
gmac_clk_enable(gmac, false);
}
static int rk_gmac_init(struct platform_device *pdev, void *priv)
{
struct rk_priv_data *bsp_priv = priv;
return rk_gmac_powerup(bsp_priv);
}
static void rk_gmac_exit(struct platform_device *pdev, void *priv)
{
struct rk_priv_data *bsp_priv = priv;
rk_gmac_powerdown(bsp_priv);
}
static void rk_gmac_suspend(struct platform_device *pdev, void *priv)
{
struct rk_priv_data *bsp_priv = priv;
/* Keep the PHY up if we use Wake-on-Lan. */
if (device_may_wakeup(&pdev->dev))
return;
rk_gmac_powerdown(bsp_priv);
bsp_priv->suspended = true;
}
static void rk_gmac_resume(struct platform_device *pdev, void *priv)
{
struct rk_priv_data *bsp_priv = priv;
/* The PHY was up for Wake-on-Lan. */
if (!bsp_priv->suspended)
return;
rk_gmac_powerup(bsp_priv);
bsp_priv->suspended = false;
}
static void rk_fix_speed(void *priv, unsigned int speed)
{
struct rk_priv_data *bsp_priv = priv;
@ -591,6 +627,8 @@ static int rk_gmac_probe(struct platform_device *pdev)
plat_dat->init = rk_gmac_init;
plat_dat->exit = rk_gmac_exit;
plat_dat->fix_mac_speed = rk_fix_speed;
plat_dat->suspend = rk_gmac_suspend;
plat_dat->resume = rk_gmac_resume;
plat_dat->bsp_priv = rk_gmac_setup(pdev, data);
if (IS_ERR(plat_dat->bsp_priv))