[PATCH 1/8] net: ethernet: stmmac: manage Ethernet WoL for stm32mp157c.

[Christophe Roullier]

Add glue codes to support magic packet on stm32mp157c

Signed-off-by: Christophe Roullier <christophe.roull...@st.com>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c | 30 ++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c 
b/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c
index 7e2e79d..d1cf145 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c
@@ -42,6 +42,7 @@ struct stm32_dwmac {
        struct clk *clk_ethstp;
        struct clk *syscfg_clk;
        bool int_phyclk;        /* Clock from RCC to drive PHY */
+       int irq_pwr_wakeup;
        u32 mode_reg;           /* MAC glue-logic mode register */
        struct regmap *regmap;
        u32 speed;
@@ -232,7 +233,9 @@ static int stm32_dwmac_parse_data(struct stm32_dwmac *dwmac,
 static int stm32mp1_parse_data(struct stm32_dwmac *dwmac,
                               struct device *dev)
 {
+       struct platform_device *pdev = to_platform_device(dev);
        struct device_node *np = dev->of_node;
+       int err = 0;
 
        dwmac->int_phyclk = of_property_read_bool(np, "st,int-phyclk");
 
@@ -260,7 +263,26 @@ static int stm32mp1_parse_data(struct stm32_dwmac *dwmac,
                return PTR_ERR(dwmac->syscfg_clk);
        }
 
-       return 0;
+       /* Get IRQ information early to have an ability to ask for deferred
+        * probe if needed before we went too far with resource allocation.
+        */
+       dwmac->irq_pwr_wakeup = platform_get_irq_byname(pdev,
+                                                       "stm32_pwr_wakeup");
+       if (!dwmac->int_phyclk && dwmac->irq_pwr_wakeup >= 0) {
+               err = device_init_wakeup(&pdev->dev, true);
+               if (err) {
+                       dev_err(&pdev->dev, "Failed to init wake up irq\n");
+                       return err;
+               }
+               err = dev_pm_set_dedicated_wake_irq(&pdev->dev,
+                                                   dwmac->irq_pwr_wakeup);
+               if (err) {
+                       dev_err(&pdev->dev, "Failed to set wake up irq\n");
+                       device_init_wakeup(&pdev->dev, false);
+               }
+               device_set_wakeup_enable(&pdev->dev, false);
+       }
+       return err;
 }
 
 static int stm32_dwmac_probe(struct platform_device *pdev)
@@ -326,9 +348,15 @@ static int stm32_dwmac_remove(struct platform_device *pdev)
        struct net_device *ndev = platform_get_drvdata(pdev);
        struct stmmac_priv *priv = netdev_priv(ndev);
        int ret = stmmac_dvr_remove(&pdev->dev);
+       struct stm32_dwmac *dwmac = priv->plat->bsp_priv;
 
        stm32_dwmac_clk_disable(priv->plat->bsp_priv);
 
+       if (dwmac->irq_pwr_wakeup >= 0) {
+               dev_pm_clear_wake_irq(&pdev->dev);
+               device_init_wakeup(&pdev->dev, false);
+       }
+
        return ret;
 }
 
-- 
2.7.4