On Mon, May 28, 2018 at 10:52:45AM +0800, Li Jun wrote:
> While set polarity, we should keep the disconnected cc line to be
> open.
>
> Signed-off-by: Li Jun <jun.li@xxxxxxx>
Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
> ---
> 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)
Thanks,
--
heikki
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