On 06/26/2018 04:45 PM, Li Jun wrote:
While set polarity, we should keep the disconnected cc line to be
open.
Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
Signed-off-by: Li Jun <jun.li@xxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
drivers/staging/typec/tcpci.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/drivers/staging/typec/tcpci.c b/drivers/staging/typec/tcpci.c
index 4d3b0ae..11c2d37 100644
--- a/drivers/staging/typec/tcpci.c
+++ b/drivers/staging/typec/tcpci.c
@@ -185,15 +185,25 @@ 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,
- (polarity == TYPEC_POLARITY_CC2) ?
- TCPC_TCPC_CTRL_ORIENTATION : 0);
+ /* Keep the disconnect cc line open */
+ ret = regmap_read(tcpci->regmap, TCPC_ROLE_CTRL, ®);
if (ret < 0)
return ret;
- return 0;
+ if (polarity == TYPEC_POLARITY_CC2)
+ reg |= TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC1_SHIFT;
+ else
+ reg |= TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC2_SHIFT;
+ ret = regmap_write(tcpci->regmap, TCPC_ROLE_CTRL, reg);
+ if (ret < 0)
+ return ret;
+
+ return regmap_write(tcpci->regmap, TCPC_TCPC_CTRL,
+ (polarity == TYPEC_POLARITY_CC2) ?
+ TCPC_TCPC_CTRL_ORIENTATION : 0);
}
static int tcpci_set_vconn(struct tcpc_dev *tcpc, bool enable)
--
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