netdev - [PATCH v2 5/6] net/wan/fsl_ucc_hdlc: GUMR for non tsa mode

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Date:   Wed, 29 Aug 2018 15:13:27 +0200
From:   David Gounaris <david.gounaris@...inera.com>
To:     qiang.zhao@....com, netdev@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, robh+dt@...nel.org
Cc:     David Gounaris <david.gounaris@...inera.com>
Subject: [PATCH v2 5/6] net/wan/fsl_ucc_hdlc: GUMR for non tsa mode

The following bits in the GUMR is changed for non
tsa mode: CDS, CTSP and CTSS are set to zero.

When set, there is no tx interrupts from the controller.

Signed-off-by: David Gounaris <david.gounaris@...inera.com>
---
 drivers/net/wan/fsl_ucc_hdlc.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/net/wan/fsl_ucc_hdlc.c b/drivers/net/wan/fsl_ucc_hdlc.c
index be5b0096af3b..248f1f5bcd04 100644
--- a/drivers/net/wan/fsl_ucc_hdlc.c
+++ b/drivers/net/wan/fsl_ucc_hdlc.c
@@ -97,6 +97,13 @@ static int uhdlc_init(struct ucc_hdlc_private *priv)
 	if (priv->tsa) {
 		uf_info->tsa = 1;
 		uf_info->ctsp = 1;
+		uf_info->cds = 1;
+		uf_info->ctss = 1;
+	}
+	else {
+		uf_info->cds = 0;
+		uf_info->ctsp = 0;
+		uf_info->ctss = 0;
 	}
 
 	/* This sets HPM register in CMXUCR register which configures a
-- 
2.13.6