Blackfin: bf518f-ezbrd: don't require SPI logic all the time

Only the first run of boards had a ksz switch on it, so if building for a
newer silicon rev or SPI is disabled, don't bother checking for the ksz.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

diff --git a/board/bf518f-ezbrd/bf518f-ezbrd.c b/board/bf518f-ezbrd/bf518f-ezbrd.c
index ff1ac4cda80a5e172eb229a42c78063e49baf506..6b455de38019d8e6139fe8f55b17e27e9f33431a 100644 (file)
--- a/board/bf518f-ezbrd/bf518f-ezbrd.c
+++ b/board/bf518f-ezbrd/bf518f-ezbrd.c
@@ -57,6 +57,13 @@ static void board_init_enetaddr(uchar *mac_addr)
        eth_setenv_enetaddr("ethaddr", mac_addr);
 }
 
+/* Only the first run of boards had a KSZ switch */
+#if defined(CONFIG_BFIN_SPI) && __SILICON_REVISION__ == 0
+# define KSZ_POSSIBLE 1
+#else
+# define KSZ_POSSIBLE 0
+#endif
+
 #define KSZ_MAX_HZ    5000000
 
 #define KSZ_WRITE     0x02
@@ -109,17 +116,16 @@ static int ksz8893m_reset(struct spi_slave *slave)
        return ret;
 }
 
-int board_eth_init(bd_t *bis)
+static bool board_ksz_init(void)
 {
-       static bool switch_is_alive = false, phy_is_ksz = true;
-       int ret;
+       static bool switch_is_alive = false;
 
        if (!switch_is_alive) {
                struct spi_slave *slave = spi_setup_slave(0, 1, KSZ_MAX_HZ, SPI_MODE_3);
                if (slave) {
                        if (!spi_claim_bus(slave)) {
-                               phy_is_ksz = (ksz8893m_reg_read(slave, KSZ_REG_CHID) == 0x88);
-                               ret = phy_is_ksz ? ksz8893m_reset(slave) : 0;
+                               bool phy_is_ksz = (ksz8893m_reg_read(slave, KSZ_REG_CHID) == 0x88);
+                               int ret = phy_is_ksz ? ksz8893m_reset(slave) : 0;
                                switch_is_alive = (ret == 0);
                                spi_release_bus(slave);
                        }
@@ -127,10 +133,16 @@ int board_eth_init(bd_t *bis)
                }
        }
 
-       if (switch_is_alive)
-               return bfin_EMAC_initialize(bis);
-       else
-               return -1;
+       return switch_is_alive;
+}
+
+int board_eth_init(bd_t *bis)
+{
+       if (KSZ_POSSIBLE) {
+               if (!board_ksz_init())
+                       return 0;
+       }
+       return bfin_EMAC_initialize(bis);
 }
 #endif