cpsw: remember the silicon version

This patch lets the CPSW driver remember the version number in order to
support the two different variants already in the wild.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index b4ca370a4e67..5c427cf1ef87 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -76,6 +76,8 @@ do {								\
 #define CPSW_MINOR_VERSION(reg)         (reg & 0xff)
 #define CPSW_RTL_VERSION(reg)           ((reg >> 11) & 0x1f)
 
+#define CPSW_VERSION_1          0x19010a
+#define CPSW_VERSION_2          0x19010c
 #define CPDMA_RXTHRESH          0x0c0
 #define CPDMA_RXFREE            0x0e0
 #define CPDMA_TXHDP             0x00
@@ -216,6 +218,7 @@ struct cpsw_priv {
         struct cpsw_wr_regs __iomem     *wr_regs;
         struct cpsw_host_regs __iomem   *host_port_regs;
         u32                             msg_enable;
+        u32                             version;
         struct net_device_stats         stats;
         int                             rx_packet_max;
         int                             host_port;
@@ -540,6 +543,7 @@ static int cpsw_ndo_open(struct net_device *ndev)
         pm_runtime_get_sync(&priv->pdev->dev);
 
         reg = __raw_readl(&priv->regs->id_ver);
+        priv->version = reg;
 
         dev_info(priv->dev, "initializing cpsw version %d.%d (%d)\n",
                  CPSW_MAJOR_VERSION(reg), CPSW_MINOR_VERSION(reg),