bcma: allow enabling PLL

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/bcma/core.c

@@ -81,3 +81,28 @@ void bcma_core_set_clockmode(struct bcma_device *core,
 	}
 }
 EXPORT_SYMBOL_GPL(bcma_core_set_clockmode);
+
+void bcma_core_pll_ctl(struct bcma_device *core, u32 req, u32 status, bool on)
+{
+	u16 i;
+
+	WARN_ON(req & ~BCMA_CLKCTLST_EXTRESREQ);
+	WARN_ON(status & ~BCMA_CLKCTLST_EXTRESST);
+
+	if (on) {
+		bcma_set32(core, BCMA_CLKCTLST, req);
+		for (i = 0; i < 10000; i++) {
+			if ((bcma_read32(core, BCMA_CLKCTLST) & status) ==
+			    status) {
+				i = 0;
+				break;
+			}
+			udelay(10);
+		}
+		if (i)
+			pr_err("PLL enable timeout\n");
+	} else {
+		pr_warn("Disabling PLL not supported yet!\n");
+	}
+}
+EXPORT_SYMBOL_GPL(bcma_core_pll_ctl);

include/linux/bcma/bcma.h

@@ -260,5 +260,7 @@ extern void bcma_core_disable(struct bcma_device *core, u32 flags);
 extern int bcma_core_enable(struct bcma_device *core, u32 flags);
 extern void bcma_core_set_clockmode(struct bcma_device *core,
 				    enum bcma_clkmode clkmode);
+extern void bcma_core_pll_ctl(struct bcma_device *core, u32 req, u32 status,
+			      bool on);
 
 #endif /* LINUX_BCMA_H_ */