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net/wan/fsl_ucc_hdlc: call qe_setbrg only for loopback mode

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We can't assume that we are always in loopback mode if rx and tx clock
have the same clock source. If we want to use HDLC busmode we also have
the same clock source but we are not in loopback mode. So move the
setting of the baudrate generator after the check for property for the
loopback mode.

Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Cc: Zhao Qiang <qiang.zhao@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Holger Brunck 2017-05-17 17:24:36 +02:00 committed by David S. Miller
parent 5b8aad93c5
commit 54e9e08749
1 changed files with 3 additions and 4 deletions
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7
drivers/net/wan/fsl_ucc_hdlc.c
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@ -113,6 +113,9 @@ static int uhdlc_init(struct ucc_hdlc_private *priv)
/* Loopback mode */
if (priv->loopback) {
dev_info(priv->dev, "Loopback Mode\n");
/* use the same clock when work in loopback */
qe_setbrg(ut_info->uf_info.rx_clock, 20000000, 1);
gumr = ioread32be(&priv->uf_regs->gumr);
gumr |= (UCC_FAST_GUMR_LOOPBACK | UCC_FAST_GUMR_CDS |
UCC_FAST_GUMR_TCI);
@ -1021,10 +1024,6 @@ static int ucc_hdlc_probe(struct platform_device *pdev)
return -EINVAL;
}
/* use the same clock when work in loopback */
if (ut_info->uf_info.rx_clock == ut_info->uf_info.tx_clock)
qe_setbrg(ut_info->uf_info.rx_clock, 20000000, 1);
ret = of_address_to_resource(np, 0, &res);
if (ret)
return -EINVAL;