bcma: allow enabling PLL

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

1 files changed, 25 insertions, 0 deletions

diff --git a/drivers/bcma/core.c b/drivers/bcma/core.c
index 0686b1b5f27a..2d8506dbca76 100644
--- a/drivers/bcma/core.c
+++ b/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);