b43: N-PHY: implement reading support for radio 0x2057

Bit 0x200 has been noticed in the following log:
 radio_read(0x02ca) -> 0x0000
radio_write(0x00ca) <- 0x0080

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

diff --git a/drivers/net/wireless/b43/phy_n.c b/drivers/net/wireless/b43/phy_n.c
index cbeb299..3d13e73 100644 (file)
--- a/drivers/net/wireless/b43/phy_n.c
+++ b/drivers/net/wireless/b43/phy_n.c
@@ -5522,8 +5522,11 @@ static u16 b43_nphy_op_radio_read(struct b43_wldev *dev, u16 reg)
 {
        /* Register 1 is a 32-bit register. */
        B43_WARN_ON(reg == 1);
-       /* N-PHY needs 0x100 for read access */
-       reg |= 0x100;
+
+       if (dev->phy.rev >= 7)
+               reg |= 0x200; /* Radio 0x2057 */
+       else
+               reg |= 0x100;
 
        b43_write16(dev, B43_MMIO_RADIO_CONTROL, reg);
        return b43_read16(dev, B43_MMIO_RADIO_DATA_LOW);