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authorFabio Estevam <fabio.estevam@nxp.com>2016-01-04 21:38:08 -0200
committerStefano Babic <sbabic@denx.de>2016-01-10 10:50:24 +0100
commit4b421d4ea179f8aed52c5b1be45c4dd75a529c91 (patch)
tree87a878b7b0c62608b30bc9c38c01fbc105da9042
parent587c3f8ebe356b558f1876414885c1b4a31294ab (diff)
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mx6cuboxi: Fix the reset delay for the AR8035 PHY
Since commit 59370f3fcd1350 ("net: phy: delay only if reset handler is registered") Ethernet is no longer functional: Booting from net ... FEC Waiting for PHY auto negotiation to complete......... TIMEOUT ! BOOTP broadcast 1 BOOTP broadcast 2 BOOTP broadcast 3 BOOTP broadcast 4 This commit does not have an issue in itself, but it revelead a problem with the Ethernet initialization. As per the AR8035 datasheet: "For a reliable power on reset, suggest to keep asserting the reset low long enough (10ms) to ensure the clock is stable and clock-to-reset 1ms requirement is satisfied." So do as suggested and keep the reset low for 10ms. Also add a 100us delay after deasserting the reset line to guarantee that the PHY ID can be read correctly and the Atheros PHY can be loaded as per Troy Kisky's suggestion. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Tested-by: Tom Rini <trini@konsulko.com>
-rw-r--r--board/solidrun/mx6cuboxi/mx6cuboxi.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/board/solidrun/mx6cuboxi/mx6cuboxi.c b/board/solidrun/mx6cuboxi/mx6cuboxi.c
index fc37f1e..18b08d1 100644
--- a/board/solidrun/mx6cuboxi/mx6cuboxi.c
+++ b/board/solidrun/mx6cuboxi/mx6cuboxi.c
@@ -143,8 +143,9 @@ static void setup_iomux_enet(void)
SETUP_IOMUX_PADS(enet_pads);
gpio_direction_output(ETH_PHY_RESET, 0);
- mdelay(2);
+ mdelay(10);
gpio_set_value(ETH_PHY_RESET, 1);
+ udelay(100);
}
int board_phy_config(struct phy_device *phydev)