linux-kernel - Re: [PATCH v3 4/7] usb: typec: tcpci

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Message-ID: <YujeA2pHG2WnZjaF@kuha.fi.intel.com>
Date:   Tue, 2 Aug 2022 11:19:15 +0300
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Gene Chen <gene.chen.richtek@...il.com>
Cc:     linux@...ck-us.net, 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 v3 4/7] usb: typec: tcpci_rt1711h: Add initial phy setting

Hi Gene,

On Mon, Aug 01, 2022 at 06:14:44PM +0800, Gene Chen wrote:
> From: Gene Chen <gene_chen@...htek.com>
> 
> Add initial phy setting about phy dicard retry,
> rx filter deglitech time and BMC-encoded wait time

I'm sorry, but what does "deglitech" mean? Is it just a typo?

> Signed-off-by: Gene Chen <gene_chen@...htek.com>
> Reviewed-by: Guenter Roeck <linux@...ck-us.net>
> ---
>  drivers/usb/typec/tcpm/tcpci_rt1711h.c | 15 ++++++++++++++-
>  1 file changed, 14 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/typec/tcpm/tcpci_rt1711h.c b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
> index df7bfe299987..33d8ea95b7c1 100644
> --- a/drivers/usb/typec/tcpm/tcpci_rt1711h.c
> +++ b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
> @@ -20,6 +20,9 @@
>  #define RT1711H_VID		0x29CF
>  #define RT1711H_PID		0x1711
>  
> +#define RT1711H_PHYCTRL1	0x80
> +#define RT1711H_PHYCTRL2	0x81
> +
>  #define RT1711H_RTCTRL8		0x9B
>  
>  /* Autoidle timeout = (tout * 2 + 1) * 6.4ms */
> @@ -107,8 +110,18 @@ static int rt1711h_init(struct tcpci *tcpci, struct tcpci_data *tdata)
>  		return ret;
>  
>  	/* dcSRC.DRP : 33% */
> -	return rt1711h_write16(chip, RT1711H_RTCTRL16, 330);
> +	ret = rt1711h_write16(chip, RT1711H_RTCTRL16, 330);
> +	if (ret < 0)
> +		return ret;
> +
> +	/* Enable phy discard retry, retry count 7, rx filter deglitech 100 us */
> +	ret = rt1711h_write8(chip, RT1711H_PHYCTRL1, 0xF1);
> +	if (ret < 0)
> +		return ret;
>  
> +	/* Decrease wait time of BMC-encoded 1 bit from 2.67us to 2.55us */
> +	/* wait time : (val * .4167) us */
> +	return rt1711h_write8(chip, RT1711H_PHYCTRL2, 62);
>  }
>  
>  static int rt1711h_set_vbus(struct tcpci *tcpci, struct tcpci_data *tdata,
> -- 
> 2.25.1

thanks,

-- 
heikki