net: ravb: Add clock handling support
authorMarek Vasut <marek.vasut@gmail.com>
Fri, 21 Jul 2017 21:20:35 +0000 (23:20 +0200)
committerNobuhiro Iwamatsu <iwamatsu@nigauri.org>
Wed, 2 Aug 2017 19:26:25 +0000 (04:26 +0900)
Add support for enabling and disabling the clock using the clock
framework based on the content of OF instead of doing it manually
in the board file.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
drivers/net/ravb.c

index ce0eacceb60adcfd51533f6bed972c0d3dc5d047..8db127ba06fa71077e9731d20947facb6cb32428 100644 (file)
@@ -10,6 +10,7 @@
  */
 
 #include <common.h>
+#include <clk.h>
 #include <dm.h>
 #include <errno.h>
 #include <miiphy.h>
@@ -120,6 +121,7 @@ struct ravb_priv {
        struct phy_device       *phydev;
        struct mii_dev          *bus;
        void __iomem            *iobase;
+       struct clk              clk;
 };
 
 static inline void ravb_flush_dcache(u32 addr, u32 len)
@@ -432,27 +434,38 @@ int ravb_start(struct udevice *dev)
        struct ravb_priv *eth = dev_get_priv(dev);
        int ret;
 
-       ret = ravb_reset(dev);
+       ret = clk_enable(&eth->clk);
        if (ret)
                return ret;
 
+       ret = ravb_reset(dev);
+       if (ret)
+               goto err;
+
        ravb_base_desc_init(eth);
        ravb_tx_desc_init(eth);
        ravb_rx_desc_init(eth);
 
        ret = ravb_config(dev);
        if (ret)
-               return ret;
+               goto err;
 
        /* Setting the control will start the AVB-DMAC process. */
        writel(CCC_OPC_OPERATION, eth->iobase + RAVB_REG_CCC);
 
        return 0;
+
+err:
+       clk_disable(&eth->clk);
+       return ret;
 }
 
 static void ravb_stop(struct udevice *dev)
 {
+       struct ravb_priv *eth = dev_get_priv(dev);
+
        ravb_reset(dev);
+       clk_disable(&eth->clk);
 }
 
 static int ravb_probe(struct udevice *dev)
@@ -466,6 +479,10 @@ static int ravb_probe(struct udevice *dev)
        iobase = map_physmem(pdata->iobase, 0x1000, MAP_NOCACHE);
        eth->iobase = iobase;
 
+       ret = clk_get_by_index(dev, 0, &eth->clk);
+       if (ret < 0)
+               goto err_mdio_alloc;
+
        mdiodev = mdio_alloc();
        if (!mdiodev) {
                ret = -ENOMEM;