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| author | Markus Niebel <Markus.Niebel@tqs.de> | 2014-02-05 10:54:11 +0100 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2014-02-11 11:33:45 +0100 |
| commit | 6ba45cc0f8b46533965219cfd90864a60ec1009b (patch) | |
| tree | 1627b25a018f4779f79d4e7590e790ff094aed3f /drivers | |
| parent | adadc915b31c4d55561c2703849f92cddfa8ad24 (diff) | |
| download | u-boot-imx-6ba45cc0f8b46533965219cfd90864a60ec1009b.zip u-boot-imx-6ba45cc0f8b46533965219cfd90864a60ec1009b.tar.gz u-boot-imx-6ba45cc0f8b46533965219cfd90864a60ec1009b.tar.bz2 | |
NET: fec_mxc: fix MDIO clock prescaler calculation
The prescaler value for MDC is calculated wrong for
MX6S. Implement the same logic as linux here which handles
ENET_MAC different then original FEC.
Tested on a custom board with i.MX6S and 100MBit PHY
Signed-off-by: Markus Niebel <Markus.Niebel@tqs.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/fec_mxc.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c index 3b2b995..4cefda4 100644 --- a/drivers/net/fec_mxc.c +++ b/drivers/net/fec_mxc.c @@ -128,8 +128,12 @@ static void fec_mii_setspeed(struct ethernet_regs *eth) * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock * and do not drop the Preamble. */ - writel((((imx_get_fecclk() / 1000000) + 2) / 5) << 1, - ð->mii_speed); + register u32 speed = DIV_ROUND_UP(imx_get_fecclk(), 5000000); +#ifdef FEC_QUIRK_ENET_MAC + speed--; +#endif + speed <<= 1; + writel(speed, ð->mii_speed); debug("%s: mii_speed %08x\n", __func__, readl(ð->mii_speed)); } |