[PATCH v2 08/12] staging: typec: tcpci: keep the uncontact cc line open

[Li Jun <jun.li@xxxxxxx>]

While set polarity, we should keep the disconnected cc line to be
open when attached.

Signed-off-by: Li Jun <jun.li@xxxxxxx>
---
Change for v2:
- Set the uncontact cc line to be open when set polarity, this way,
  we don't need change set_cc api.

 drivers/staging/typec/tcpci.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/staging/typec/tcpci.c b/drivers/staging/typec/tcpci.c
index 530a5d7..7145771 100644
--- a/drivers/staging/typec/tcpci.c
+++ b/drivers/staging/typec/tcpci.c
@@ -184,6 +184,7 @@ static int tcpci_set_polarity(struct tcpc_dev *tcpc,
 			      enum typec_cc_polarity polarity)
 {
 	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+	unsigned int reg;
 	int ret;
 
 	ret = regmap_write(tcpci->regmap, TCPC_TCPC_CTRL,
@@ -192,6 +193,20 @@ static int tcpci_set_polarity(struct tcpc_dev *tcpc,
 	if (ret < 0)
 		return ret;
 
+	ret = regmap_read(tcpci->regmap, TCPC_ROLE_CTRL, &reg);
+	if (ret < 0)
+		return ret;
+
+	if (polarity == TYPEC_POLARITY_CC2)
+		ret = TCPC_ROLE_CTRL_CC1_SHIFT;
+	else
+		ret = TCPC_ROLE_CTRL_CC2_SHIFT;
+	reg |= TCPC_ROLE_CTRL_CC_OPEN << ret;
+	reg &= ~TCPC_ROLE_CTRL_DRP;
+	ret = regmap_write(tcpci->regmap, TCPC_ROLE_CTRL, reg);
+	if (ret < 0)
+		return ret;
+
 	return 0;
 }
 
-- 
2.7.4

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