[PATCH net-next v2 3/3] net: emaclite: Adopt clock support

[Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>]

From: Abin Joseph <abin.joseph@amd.com>

Adapt to use the clock framework. Add s_axi_aclk clock from the processor
bus clock domain and make clk optional to keep DTB backward compatibility.

Signed-off-by: Abin Joseph <abin.joseph@amd.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>
---
changes for v2:
- None.
---
 drivers/net/ethernet/xilinx/xilinx_emaclite.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/ethernet/xilinx/xilinx_emaclite.c b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
index 418587942527..fe901af5ddfa 100644
--- a/drivers/net/ethernet/xilinx/xilinx_emaclite.c
+++ b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
@@ -7,6 +7,7 @@
  * Copyright (c) 2007 - 2013 Xilinx, Inc.
  */
 
+#include <linux/clk.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/uaccess.h>
@@ -1091,6 +1092,7 @@ static int xemaclite_of_probe(struct platform_device *ofdev)
 	struct net_device *ndev = NULL;
 	struct net_local *lp = NULL;
 	struct device *dev = &ofdev->dev;
+	struct clk *clkin;
 
 	int rc = 0;
 
@@ -1127,6 +1129,12 @@ static int xemaclite_of_probe(struct platform_device *ofdev)
 	lp->tx_ping_pong = get_bool(ofdev, "xlnx,tx-ping-pong");
 	lp->rx_ping_pong = get_bool(ofdev, "xlnx,rx-ping-pong");
 
+	clkin = devm_clk_get_optional_enabled(&ofdev->dev, NULL);
+	if (IS_ERR(clkin)) {
+		return dev_err_probe(&ofdev->dev, PTR_ERR(clkin),
+				"Failed to get and enable clock from Device Tree\n");
+	}
+
 	rc = of_get_ethdev_address(ofdev->dev.of_node, ndev);
 	if (rc) {
 		dev_warn(dev, "No MAC address found, using random\n");
-- 
2.34.1