commit 1fea9e25faca9d72a52b7da1587b90153fde6239
author Marek Vasut <marek.vasut@gmail.com> Fri Jul 21 23:20:35 2017 +0200
committer Nobuhiro Iwamatsu <iwamatsu@nigauri.org> Thu Aug 03 04:26:25 2017 +0900
tree d1eaa9645be6b9c13793e1f8d3a56a2a29ea0f5b
parent e821a7bdb13435eace82e907363dc59be56f139a

net: ravb: Add clock handling support

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

diff --git a/drivers/net/ravb.c b/drivers/net/ravb.c
index ce0eacc..8db127b 100644
--- a/drivers/net/ravb.c
+++ b/drivers/net/ravb.c
@@ -10,6 +10,7 @@
  */
 
 #include <common.h>
+#include <clk.h>
 #include <dm.h>
 #include <errno.h>
 #include <miiphy.h>
@@ -120,6 +121,7 @@
 	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 @@
 	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 @@
 	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;