From 54e9e0874938ba5b112b9352e280b4962590a57d Mon Sep 17 00:00:00 2001 From: Holger Brunck Date: Wed, 17 May 2017 17:24:36 +0200 Subject: [PATCH] net/wan/fsl_ucc_hdlc: call qe_setbrg only for loopback mode 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 Cc: Zhao Qiang Signed-off-by: David S. Miller --- drivers/net/wan/fsl_ucc_hdlc.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/net/wan/fsl_ucc_hdlc.c b/drivers/net/wan/fsl_ucc_hdlc.c index 49b91b2..4c93d56 100644 --- a/drivers/net/wan/fsl_ucc_hdlc.c +++ b/drivers/net/wan/fsl_ucc_hdlc.c @@ -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; -- 2.7.4