ks8851: Add caching of CCR register

CCR register contains information on companion eeprom availability.

Signed-off-by: Sebastien Jan <s-jan@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/net/ks8851.c b/drivers/net/ks8851.c
index b8ed1ee37ac1..623171f37d99 100644
--- a/drivers/net/ks8851.c
+++ b/drivers/net/ks8851.c
@@ -78,7 +78,9 @@ union ks8851_tx_hdr {
  * @msg_enable: The message flags controlling driver output (see ethtool).
  * @fid: Incrementing frame id tag.
  * @rc_ier: Cached copy of KS_IER.
+ * @rc_ccr: Cached copy of KS_CCR.
  * @rc_rxqcr: Cached copy of KS_RXQCR.
+ * @eeprom_size: Companion eeprom size in Bytes, 0 if no eeprom
  *
  * The @lock ensures that the chip is protected when certain operations are
  * in progress. When the read or write packet transfer is in progress, most
@@ -109,6 +111,8 @@ struct ks8851_net {
 
         u16                     rc_ier;
         u16                     rc_rxqcr;
+        u16                     rc_ccr;
+        u16                     eeprom_size;
 
         struct mii_if_info      mii;
         struct ks8851_rxctrl    rxctrl;
@@ -1269,6 +1273,14 @@ static int __devinit ks8851_probe(struct spi_device *spi)
                 goto err_id;
         }
 
+        /* cache the contents of the CCR register for EEPROM, etc. */
+        ks->rc_ccr = ks8851_rdreg16(ks, KS_CCR);
+
+        if (ks->rc_ccr & CCR_EEPROM)
+                ks->eeprom_size = 128;
+        else
+                ks->eeprom_size = 0;
+
         ks8851_read_selftest(ks);
         ks8851_init_mac(ks);