b43: add helper waiting for given value in radio reg

[firefly-linux-kernel-4.4.55.git] / drivers / net / wireless / b43 / phy_common.c

diff --git a/drivers/net/wireless/b43/phy_common.c b/drivers/net/wireless/b43/phy_common.c
index f627cef3322715445c6f389fde58bbfb5139ee5d..f01676ac481b25071e9f7aae9ad790dbd5836ff0 100644 (file)
--- a/drivers/net/wireless/b43/phy_common.c
+++ b/drivers/net/wireless/b43/phy_common.c
@@ -240,6 +240,21 @@ void b43_radio_maskset(struct b43_wldev *dev, u16 offset, u16 mask, u16 set)
                          (b43_radio_read16(dev, offset) & mask) | set);
 }
 
+bool b43_radio_wait_value(struct b43_wldev *dev, u16 offset, u16 mask,
+                         u16 value, int delay, int timeout)
+{
+       u16 val;
+       int i;
+
+       for (i = 0; i < timeout; i += delay) {
+               val = b43_radio_read(dev, offset);
+               if ((val & mask) == value)
+                       return true;
+               udelay(delay);
+       }
+       return false;
+}
+
 u16 b43_phy_read(struct b43_wldev *dev, u16 reg)
 {
        assert_mac_suspended(dev);