[U-Boot] [PATCH v2] usb: add clock support for generic EHCI

[Masahiro Yamada]

This driver is designed in a generic manner, so clocks should be
handled genericly as well.

Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>
---

Changes in v2:
  - rephrase git-log
  - rebase on commit 12f229ea
  - do not store clk devices and IDs in the private data

 drivers/usb/host/ehci-generic.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/usb/host/ehci-generic.c b/drivers/usb/host/ehci-generic.c
index 1292caa..98f9db7 100644
--- a/drivers/usb/host/ehci-generic.c
+++ b/drivers/usb/host/ehci-generic.c
@@ -5,6 +5,7 @@
  */
 
 #include <common.h>
+#include <clk.h>
 #include <dm.h>
 #include "ehci.h"
 
@@ -21,6 +22,20 @@ static int ehci_usb_probe(struct udevice *dev)
 {
 	struct ehci_hccr *hccr = (struct ehci_hccr *)dev_get_addr(dev);
 	struct ehci_hcor *hcor;
+	int i = 0;
+
+	while (1) {
+		struct udevice *clk_dev;
+		int clk_id;
+
+		clk_id = clk_get_by_index(dev, i, &clk_dev);
+		if (clk_id < 0)
+			break;
+		if (clk_enable(clk_dev, clk_id))
+			printf("failed to enable clock (dev=%s, id=%d)\n",
+			       clk_dev->name, clk_id);
+		i++;
+	}
 
 	hcor = (struct ehci_hcor *)((uintptr_t)hccr +
 				    HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
-- 
1.9.1