linux-kernel - Re: [PATCH v5 10/15] USB: typec: Add port registration for tps25750

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Message-ID: <ZQhJZ82nRCD797lA@kuha.fi.intel.com>
Date:   Mon, 18 Sep 2023 15:58:15 +0300
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Abdel Alkuor <alkuor@...il.com>
Cc:     krzysztof.kozlowski+dt@...aro.org, bryan.odonoghue@...aro.org,
        gregkh@...uxfoundation.org, robh+dt@...nel.org,
        linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
        conor+dt@...nel.org, linux-kernel@...r.kernel.org,
        abdelalkuor@...tab.com
Subject: Re: [PATCH v5 10/15] USB: typec: Add port registration for tps25750

On Sun, Sep 17, 2023 at 11:26:34AM -0400, Abdel Alkuor wrote:
> From: Abdel Alkuor <abdelalkuor@...tab.com>
> 
> TPS25750 doesn't have system configuration register to get dr/pr of the
> current applied binary configuration.
> 
> Get data role from the device node and power role from PD status register.
> 
> Signed-off-by: Abdel Alkuor <abdelalkuor@...tab.com>
> ---
>  drivers/usb/typec/tipd/core.c     | 61 ++++++++++++++++++++++++++++++-
>  drivers/usb/typec/tipd/tps6598x.h | 10 +++++
>  2 files changed, 70 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
> index 8218d88a4a06..a97fda68cb54 100644
> --- a/drivers/usb/typec/tipd/core.c
> +++ b/drivers/usb/typec/tipd/core.c
> @@ -39,6 +39,7 @@
>  #define TPS_REG_CTRL_CONF		0x29
>  #define TPS_REG_BOOT_STATUS		0x2D
>  #define TPS_REG_POWER_STATUS		0x3f
> +#define TPS_REG_PD_STATUS		0x40
>  #define TPS_REG_RX_IDENTITY_SOP		0x48
>  #define TPS_REG_DATA_STATUS		0x5f
>  
> @@ -1028,6 +1029,60 @@ tps6598x_register_port(struct tps6598x *tps, struct fwnode_handle *fwnode)
>  	return 0;
>  }
>  
> +static int
> +tps25750_register_port(struct tps6598x *tps, struct fwnode_handle *fwnode)
> +{
> +	struct typec_capability typec_cap = { };
> +	const char *data_role;
> +	u8 pd_status;
> +	int ret;
> +
> +	ret = tps6598x_read8(tps, TPS_REG_PD_STATUS, &pd_status);
> +	if (ret)
> +		return ret;
> +
> +	ret = fwnode_property_read_string(fwnode, "data-role", &data_role);
> +	if (ret) {
> +		dev_err(tps->dev, "data-role not found: %d\n", ret);
> +		return ret;
> +	}
> +
> +	ret = typec_find_port_data_role(data_role);
> +	if (ret < 0) {
> +		dev_err(tps->dev, "unknown data-role: %s\n", data_role);
> +		return ret;
> +	}
> +
> +	typec_cap.data = ret;
> +	typec_cap.revision = USB_TYPEC_REV_1_3;
> +	typec_cap.pd_revision = 0x300;
> +	typec_cap.driver_data = tps;
> +	typec_cap.ops = &tps6598x_ops;
> +	typec_cap.fwnode = fwnode;
> +	typec_cap.prefer_role = TYPEC_NO_PREFERRED_ROLE;
> +
> +	switch (TPS_PD_STATUS_PORT_TYPE(pd_status)) {
> +	case TPS_PD_STATUS_PORT_TYPE_SINK_SOURCE:
> +	case TPS_PD_STATUS_PORT_TYPE_SOURCE_SINK:
> +		typec_cap.type = TYPEC_PORT_DRP;
> +		break;
> +	case TPS_PD_STATUS_PORT_TYPE_SINK:
> +		typec_cap.type = TYPEC_PORT_SNK;
> +		break;
> +	case TPS_PD_STATUS_PORT_TYPE_SOURCE:
> +		typec_cap.type = TYPEC_PORT_SRC;
> +		break;
> +	default:
> +		return -ENODEV;
> +	}
> +
> +	tps->port = typec_register_port(tps->dev, &typec_cap);
> +	if (IS_ERR(tps->port))
> +		return PTR_ERR(tps->port);
> +
> +	return 0;
> +}
> +
>  static int tps6598x_probe(struct i2c_client *client)
>  {
>  	irq_handler_t irq_handler = tps6598x_interrupt;
> @@ -1124,7 +1179,11 @@ static int tps6598x_probe(struct i2c_client *client)
>  	if (ret)
>  		goto err_role_put;
>  
> -	ret = tps6598x_register_port(tps, fwnode);
> +	if (np && of_device_is_compatible(np, "ti,tps25750"))

Why aren't you using is_tps25750 here?

> +		ret = tps25750_register_port(tps, fwnode);
> +	else
> +		ret = tps6598x_register_port(tps, fwnode);
> +
>  	if (ret)
>  		goto err_role_put;

thanks,

-- 
heikki