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authorStefan Roese <sr@denx.de>2007-11-13 08:18:20 +0100
committerStefan Roese <sr@denx.de>2007-11-13 08:18:20 +0100
commit54fd6c93c28a0a45352fff5dd92673401ff563f2 (patch)
tree337a4d3eace97b3d56b7f955c3ddb9fb3711ef17 /board
parent5c568d6a7f950b9e7e32a63a5893f979b8789b4d (diff)
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ppc4xx: lwmon5: Change PHY reset sequence for PHY MDIO address latching
Signed-off-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'board')
-rw-r--r--board/lwmon5/lwmon5.c26
1 files changed, 17 insertions, 9 deletions
diff --git a/board/lwmon5/lwmon5.c b/board/lwmon5/lwmon5.c
index 77f9989..9b24a7e 100644
--- a/board/lwmon5/lwmon5.c
+++ b/board/lwmon5/lwmon5.c
@@ -96,6 +96,23 @@ int board_early_init_f(void)
gpio_write_bit(CFG_GPIO_FLASH_WP, 1);
+ /*
+ * Reset PHY's:
+ * The PHY's need a 2nd reset pulse, since the MDIO address is latched
+ * upon reset, and with the first reset upon powerup, the addresses are
+ * not latched reliable, since the IRQ line is multiplexed with an
+ * MDIO address. A 2nd reset at this time will make sure, that the
+ * correct address is latched.
+ */
+ gpio_write_bit(CFG_GPIO_PHY0_RST, 1);
+ gpio_write_bit(CFG_GPIO_PHY1_RST, 1);
+ udelay(1000);
+ gpio_write_bit(CFG_GPIO_PHY0_RST, 0);
+ gpio_write_bit(CFG_GPIO_PHY1_RST, 0);
+ udelay(1000);
+ gpio_write_bit(CFG_GPIO_PHY0_RST, 1);
+ gpio_write_bit(CFG_GPIO_PHY1_RST, 1);
+
return 0;
}
@@ -231,15 +248,6 @@ int misc_init_r(void)
out_be32((void *)CFG_LIME_MMR, CFG_LIME_MMR_VALUE);
/*
- * Reset PHY's
- */
- gpio_write_bit(CFG_GPIO_PHY0_RST, 0);
- gpio_write_bit(CFG_GPIO_PHY1_RST, 0);
- udelay(100);
- gpio_write_bit(CFG_GPIO_PHY0_RST, 1);
- gpio_write_bit(CFG_GPIO_PHY1_RST, 1);
-
- /*
* Init display controller
*/
/* Setup dot clock (internal PLL, division rate 1/16) */