linux-kernel - Re: [PATCH v4 3/7] usb: typec: tcpci_rt1711h: Add regulator support when source vbus

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Date:   Fri, 5 Aug 2022 04:26:18 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Gene Chen <gene.chen.richtek@...il.com>
Cc:     heikki.krogerus@...ux.intel.com, gregkh@...uxfoundation.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, gene_chen@...htek.com,
        cy_huang@...htek.com
Subject: Re: [PATCH v4 3/7] usb: typec: tcpci_rt1711h: Add regulator support
 when source vbus

On Fri, Aug 05, 2022 at 03:17:09PM +0800, Gene Chen wrote:
> From: Gene Chen <gene_chen@...htek.com>
> 
> Add regulator support when source vbus
> 
> Signed-off-by: Gene Chen <gene_chen@...htek.com>
> Acked-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> ---
>  drivers/usb/typec/tcpm/tcpci_rt1711h.c | 28 ++++++++++++++++++++++++++++
>  1 file changed, 28 insertions(+)
> 
> diff --git a/drivers/usb/typec/tcpm/tcpci_rt1711h.c b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
> index f2f1fb0..fb19d7b 100644
> --- a/drivers/usb/typec/tcpm/tcpci_rt1711h.c
> +++ b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
> @@ -14,6 +14,7 @@
>  #include <linux/usb/tcpci.h>
>  #include <linux/usb/tcpm.h>
>  #include <linux/regmap.h>
> +#include <linux/regulator/consumer.h>
>  
>  #define RT1711H_VID		0x29CF
>  #define RT1711H_PID		0x1711
> @@ -41,6 +42,8 @@ struct rt1711h_chip {
>  	struct tcpci_data data;
>  	struct tcpci *tcpci;
>  	struct device *dev;
> +	struct regulator *vbus;
> +	bool src_en;
>  };
>  
>  static int rt1711h_read16(struct rt1711h_chip *chip, unsigned int reg, u16 *val)
> @@ -104,6 +107,26 @@ static int rt1711h_init(struct tcpci *tcpci, struct tcpci_data *tdata)
>  
>  	/* dcSRC.DRP : 33% */
>  	return rt1711h_write16(chip, RT1711H_RTCTRL16, 330);
> +

Nit: unnecessary empty line

Otherwise

Reviewed-by: Guenter Roeck <linux@...ck-us.net>

> +}
> +
> +static int rt1711h_set_vbus(struct tcpci *tcpci, struct tcpci_data *tdata,
> +			    bool src, bool snk)
> +{
> +	struct rt1711h_chip *chip = tdata_to_rt1711h(tdata);
> +	int ret;
> +
> +	if (chip->src_en == src)
> +		return 0;
> +
> +	if (src)
> +		ret = regulator_enable(chip->vbus);
> +	else
> +		ret = regulator_disable(chip->vbus);
> +
> +	if (!ret)
> +		chip->src_en = src;
> +	return ret;
>  }
>  
>  static int rt1711h_set_vconn(struct tcpci *tcpci, struct tcpci_data *tdata,
> @@ -247,7 +270,12 @@ static int rt1711h_probe(struct i2c_client *client,
>  	if (ret < 0)
>  		return ret;
>  
> +	chip->vbus = devm_regulator_get(&client->dev, "vbus");
> +	if (IS_ERR(chip->vbus))
> +		return PTR_ERR(chip->vbus);
> +
>  	chip->data.init = rt1711h_init;
> +	chip->data.set_vbus = rt1711h_set_vbus;
>  	chip->data.set_vconn = rt1711h_set_vconn;
>  	chip->data.start_drp_toggling = rt1711h_start_drp_toggling;
>  	chip->tcpci = tcpci_register_port(chip->dev, &chip->data);
> -- 
> 2.7.4
>