From: Heikki Krogerus <heikki.krogerus@linux.intel.com>
To: Badhri Jagan Sridharan <badhri@google.com>
Cc: Guenter Roeck <linux@roeck-us.net>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v6 10/14] usb: typec: tcpci: Implement callbacks for FRS
Date: Tue, 15 Sep 2020 16:23:49 +0300 [thread overview]
Message-ID: <20200915132349.GI1139641@kuha.fi.intel.com> (raw)
In-Reply-To: <20200901025927.3596190-11-badhri@google.com>
On Mon, Aug 31, 2020 at 07:59:23PM -0700, Badhri Jagan Sridharan wrote:
> Implement tcpc.enable_frs to enable TCPC to receive
> Fast role swap signal.
>
> Additionally set the sink disconnect threshold to 4v
> to prevent disconnect during Fast Role swap.
>
> Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
One nitpick below. Otherwise, FWIW:
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
> ---
> Changes since v1:
> - Changing patch version to v6 to fix version number confusion.
> ---
> drivers/usb/typec/tcpm/tcpci.c | 17 +++++++++++++++++
> drivers/usb/typec/tcpm/tcpci.h | 8 ++++++++
> 2 files changed, 25 insertions(+)
>
> diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c
> index d6a6fac82d48..f9f0af64da5f 100644
> --- a/drivers/usb/typec/tcpm/tcpci.c
> +++ b/drivers/usb/typec/tcpm/tcpci.c
> @@ -268,6 +268,22 @@ static int tcpci_set_vconn(struct tcpc_dev *tcpc, bool enable)
> enable ? TCPC_POWER_CTRL_VCONN_ENABLE : 0);
> }
>
> +static int tcpci_enable_frs(struct tcpc_dev *dev, bool enable)
> +{
> + struct tcpci *tcpci = tcpc_to_tcpci(dev);
> + int ret;
> +
> + /* To prevent disconnect during FRS, set disconnect threshold to 3.5V */
> + ret = tcpci_write16(tcpci, TCPC_VBUS_SINK_DISCONNECT_THRESH, enable ? 0 : 0x8c);
> + if (ret < 0)
> + return ret;
> +
> + ret = regmap_update_bits(tcpci->regmap, TCPC_POWER_CTRL, TCPC_FAST_ROLE_SWAP_EN, enable ?
> + TCPC_FAST_ROLE_SWAP_EN : 0);
ret = regmap_update_bits(tcpci->regmap, TCPC_POWER_CTRL, TCPC_FAST_ROLE_SWAP_EN,
enable ? TCPC_FAST_ROLE_SWAP_EN : 0);
> +
> + return ret;
> +}
> +
> static int tcpci_set_bist_data(struct tcpc_dev *tcpc, bool enable)
> {
> struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
> @@ -611,6 +627,7 @@ struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data)
> tcpci->tcpc.set_roles = tcpci_set_roles;
> tcpci->tcpc.pd_transmit = tcpci_pd_transmit;
> tcpci->tcpc.set_bist_data = tcpci_set_bist_data;
> + tcpci->tcpc.enable_frs = tcpci_enable_frs;
>
> err = tcpci_parse_config(tcpci);
> if (err < 0)
> diff --git a/drivers/usb/typec/tcpm/tcpci.h b/drivers/usb/typec/tcpm/tcpci.h
> index 82f021a82456..5ef07a56d67a 100644
> --- a/drivers/usb/typec/tcpm/tcpci.h
> +++ b/drivers/usb/typec/tcpm/tcpci.h
> @@ -16,6 +16,7 @@
> #define TCPC_PD_INT_REV 0xa
>
> #define TCPC_ALERT 0x10
> +#define TCPC_ALERT_EXTND BIT(14)
> #define TCPC_ALERT_EXTENDED_STATUS BIT(13)
> #define TCPC_ALERT_VBUS_DISCNCT BIT(11)
> #define TCPC_ALERT_RX_BUF_OVF BIT(10)
> @@ -37,6 +38,9 @@
> #define TCPC_EXTENDED_STATUS_MASK 0x16
> #define TCPC_EXTENDED_STATUS_MASK_VSAFE0V BIT(0)
>
> +#define TCPC_ALERT_EXTENDED_MASK 0x17
> +#define TCPC_SINK_FAST_ROLE_SWAP BIT(0)
> +
> #define TCPC_CONFIG_STD_OUTPUT 0x18
>
> #define TCPC_TCPC_CTRL 0x19
> @@ -63,6 +67,7 @@
>
> #define TCPC_POWER_CTRL 0x1c
> #define TCPC_POWER_CTRL_VCONN_ENABLE BIT(0)
> +#define TCPC_FAST_ROLE_SWAP_EN BIT(7)
>
> #define TCPC_CC_STATUS 0x1d
> #define TCPC_CC_STATUS_TOGGLING BIT(5)
> @@ -74,11 +79,14 @@
>
> #define TCPC_POWER_STATUS 0x1e
> #define TCPC_POWER_STATUS_UNINIT BIT(6)
> +#define TCPC_POWER_STATUS_SOURCING_VBUS BIT(4)
> #define TCPC_POWER_STATUS_VBUS_DET BIT(3)
> #define TCPC_POWER_STATUS_VBUS_PRES BIT(2)
>
> #define TCPC_FAULT_STATUS 0x1f
>
> +#define TCPC_ALERT_EXTENDED 0x21
> +
> #define TCPC_COMMAND 0x23
> #define TCPC_CMD_WAKE_I2C 0x11
> #define TCPC_CMD_DISABLE_VBUS_DETECT 0x22
> --
> 2.28.0.402.g5ffc5be6b7-goog
thanks,
--
heikki
next prev parent reply other threads:[~2020-09-16 0:37 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-01 2:59 [PATCH v6 00/14] TCPM support for FRS and AutoDischarge Disconnect Badhri Jagan Sridharan
2020-09-01 2:59 ` [PATCH v6 01/14] usb: typec: tcpci: Add register definitions to tcpci Badhri Jagan Sridharan
2020-09-15 12:10 ` Heikki Krogerus
2020-09-01 2:59 ` [PATCH v6 02/14] usb: typec: tcpci: Add support when hidden tx registers are inaccessible Badhri Jagan Sridharan
2020-09-15 12:11 ` Heikki Krogerus
2020-09-01 2:59 ` [PATCH v6 03/14] usb: typec: tcpci: update ROLE_CONTROL for DRP Badhri Jagan Sridharan
2020-09-15 12:12 ` Heikki Krogerus
2020-09-01 2:59 ` [PATCH v6 04/14] usb: typec: tcpci: Add a getter method to retrieve tcpm_port reference Badhri Jagan Sridharan
2020-09-15 12:16 ` Heikki Krogerus
2020-09-01 2:59 ` [PATCH v6 05/14] usb: typec: tcpci: Add set_vbus tcpci callback Badhri Jagan Sridharan
2020-09-15 12:22 ` Heikki Krogerus
2020-09-16 9:07 ` Badhri Jagan Sridharan
2020-09-01 2:59 ` [PATCH v6 06/14] dt-bindings: usb: Maxim type-c controller device tree binding document Badhri Jagan Sridharan
2020-09-01 2:59 ` [PATCH v6 07/14] usb: typec: tcpci_maxim: Chip level TCPC driver Badhri Jagan Sridharan
2020-09-15 12:43 ` Heikki Krogerus
2020-09-16 9:34 ` Badhri Jagan Sridharan
2020-09-01 2:59 ` [PATCH v6 08/14] dt-bindings: connector: Add property to set initial current cap for FRS Badhri Jagan Sridharan
2020-09-01 2:59 ` [PATCH v6 09/14] usb: typec: tcpm: Add support for Sink Fast Role SWAP(FRS) Badhri Jagan Sridharan
2020-09-15 13:20 ` Heikki Krogerus
2020-09-17 10:23 ` Badhri Jagan Sridharan
2020-09-01 2:59 ` [PATCH v6 10/14] usb: typec: tcpci: Implement callbacks for FRS Badhri Jagan Sridharan
2020-09-15 13:23 ` Heikki Krogerus [this message]
2020-09-01 2:59 ` [PATCH v6 11/14] usb: typec: tcpci_maxim: Add support for Sink FRS Badhri Jagan Sridharan
2020-09-15 13:25 ` Heikki Krogerus
2020-09-01 2:59 ` [PATCH v6 12/14] usb: typec: tcpm: Implement enabling Auto Discharge disconnect support Badhri Jagan Sridharan
2020-09-01 2:59 ` [PATCH v6 13/14] usb: typec: tcpci: Implement Auto discharge disconnect callbacks Badhri Jagan Sridharan
2020-09-01 2:59 ` [PATCH v6 14/14] usb: typec: tcpci_maxim: Implemnent set_auto_vbus_discharge_threshold Badhri Jagan Sridharan
2020-09-15 12:09 ` [PATCH v6 00/14] TCPM support for FRS and AutoDischarge Disconnect Heikki Krogerus
2020-09-15 16:57 ` Badhri Jagan Sridharan
2020-09-15 13:33 ` Heikki Krogerus
2020-09-15 16:59 ` Badhri Jagan Sridharan
2020-09-16 11:05 ` Greg Kroah-Hartman
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