drivers: net: davinci_mdio: enable pm runtime auto for ti cpsw-mdio

Use "ti,cpsw-mdio" to enable PM runtime auto-suspend on supported
platforms, where MDIO is implemented as part of TI CPSW.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/ti/davinci_mdio.c b/drivers/net/ethernet/ti/davinci_mdio.c
index ce3ec42..33df340 100644 (file)
--- a/drivers/net/ethernet/ti/davinci_mdio.c
+++ b/drivers/net/ethernet/ti/davinci_mdio.c
@@ -53,6 +53,10 @@
 
 #define DEF_OUT_FREQ           2200000         /* 2.2 MHz */
 
+struct davinci_mdio_of_param {
+       int autosuspend_delay_ms;
+};
+
 struct davinci_mdio_regs {
        u32     version;
        u32     control;
@@ -332,6 +336,19 @@ static int davinci_mdio_probe_dt(struct mdio_platform_data *data,
 }
 #endif
 
+#if IS_ENABLED(CONFIG_OF)
+static const struct davinci_mdio_of_param of_cpsw_mdio_data = {
+       .autosuspend_delay_ms = 100,
+};
+
+static const struct of_device_id davinci_mdio_of_mtable[] = {
+       { .compatible = "ti,davinci_mdio", },
+       { .compatible = "ti,cpsw-mdio", .data = &of_cpsw_mdio_data},
+       { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, davinci_mdio_of_mtable);
+#endif
+
 static int davinci_mdio_probe(struct platform_device *pdev)
 {
        struct mdio_platform_data *pdata = dev_get_platdata(&pdev->dev);
@@ -340,6 +357,7 @@ static int davinci_mdio_probe(struct platform_device *pdev)
        struct resource *res;
        struct phy_device *phy;
        int ret, addr;
+       int autosuspend_delay_ms = -1;
 
        data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
        if (!data)
@@ -352,9 +370,22 @@ static int davinci_mdio_probe(struct platform_device *pdev)
        }
 
        if (dev->of_node) {
-               if (davinci_mdio_probe_dt(&data->pdata, pdev))
-                       data->pdata = default_pdata;
+               const struct of_device_id       *of_id;
+
+               ret = davinci_mdio_probe_dt(&data->pdata, pdev);
+               if (ret)
+                       return ret;
                snprintf(data->bus->id, MII_BUS_ID_SIZE, "%s", pdev->name);
+
+               of_id = of_match_device(davinci_mdio_of_mtable, &pdev->dev);
+               if (of_id) {
+                       const struct davinci_mdio_of_param *of_mdio_data;
+
+                       of_mdio_data = of_id->data;
+                       if (of_mdio_data)
+                               autosuspend_delay_ms =
+                                       of_mdio_data->autosuspend_delay_ms;
+               }
        } else {
                data->pdata = pdata ? (*pdata) : default_pdata;
                snprintf(data->bus->id, MII_BUS_ID_SIZE, "%s-%x",
@@ -384,7 +415,7 @@ static int davinci_mdio_probe(struct platform_device *pdev)
 
        davinci_mdio_init_clk(data);
 
-       pm_runtime_set_autosuspend_delay(&pdev->dev, -1);
+       pm_runtime_set_autosuspend_delay(&pdev->dev, autosuspend_delay_ms);
        pm_runtime_use_autosuspend(&pdev->dev);
        pm_runtime_enable(&pdev->dev);
 
@@ -495,14 +526,6 @@ static const struct dev_pm_ops davinci_mdio_pm_ops = {
        SET_LATE_SYSTEM_SLEEP_PM_OPS(davinci_mdio_suspend, davinci_mdio_resume)
 };
 
-#if IS_ENABLED(CONFIG_OF)
-static const struct of_device_id davinci_mdio_of_mtable[] = {
-       { .compatible = "ti,davinci_mdio", },
-       { /* sentinel */ },
-};
-MODULE_DEVICE_TABLE(of, davinci_mdio_of_mtable);
-#endif
-
 static struct platform_driver davinci_mdio_driver = {
        .driver = {
                .name    = "davinci_mdio",