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| author | Fabio Estevam <fabio.estevam@nxp.com> | 2016-01-04 21:38:08 -0200 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2016-01-10 10:50:24 +0100 |
| commit | 4b421d4ea179f8aed52c5b1be45c4dd75a529c91 (patch) | |
| tree | 87a878b7b0c62608b30bc9c38c01fbc105da9042 /board/solidrun | |
| parent | 587c3f8ebe356b558f1876414885c1b4a31294ab (diff) | |
| download | blackbird-obmc-uboot-4b421d4ea179f8aed52c5b1be45c4dd75a529c91.tar.gz blackbird-obmc-uboot-4b421d4ea179f8aed52c5b1be45c4dd75a529c91.zip | |
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>
Diffstat (limited to 'board/solidrun')
| -rw-r--r-- | board/solidrun/mx6cuboxi/mx6cuboxi.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/board/solidrun/mx6cuboxi/mx6cuboxi.c b/board/solidrun/mx6cuboxi/mx6cuboxi.c index fc37f1eef0..18b08d12fa 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) |
