linux-kernel - Re: [PATCH v4 2/7] usb: typec: tcpci_rt1711h: Fix vendor setting when set vconn

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Date:   Fri, 5 Aug 2022 04:24:41 -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 2/7] usb: typec: tcpci_rt1711h: Fix vendor setting
 when set vconn

On Fri, Aug 05, 2022 at 03:17:08PM +0800, Gene Chen wrote:
> From: Gene Chen <gene_chen@...htek.com>
> 
> replace overwrite whole register with update bits
> 
> Signed-off-by: Gene Chen <gene_chen@...htek.com>

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

> ---
>  drivers/usb/typec/tcpm/tcpci_rt1711h.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/usb/typec/tcpm/tcpci_rt1711h.c b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
> index 3291ca4..f2f1fb0 100644
> --- a/drivers/usb/typec/tcpm/tcpci_rt1711h.c
> +++ b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
> @@ -5,6 +5,7 @@
>   * Richtek RT1711H Type-C Chip Driver
>   */
>  
> +#include <linux/bits.h>
>  #include <linux/kernel.h>
>  #include <linux/module.h>
>  #include <linux/i2c.h>
> @@ -23,6 +24,7 @@
>  #define RT1711H_RTCTRL8_SET(ck300, ship_off, auto_idle, tout) \
>  			    (((ck300) << 7) | ((ship_off) << 5) | \
>  			    ((auto_idle) << 3) | ((tout) & 0x07))
> +#define RT1711H_AUTOIDLEEN	BIT(3)
>  
>  #define RT1711H_RTCTRL11	0x9E
>  
> @@ -109,8 +111,8 @@ static int rt1711h_set_vconn(struct tcpci *tcpci, struct tcpci_data *tdata,
>  {
>  	struct rt1711h_chip *chip = tdata_to_rt1711h(tdata);
>  
> -	return rt1711h_write8(chip, RT1711H_RTCTRL8,
> -			      RT1711H_RTCTRL8_SET(0, 1, !enable, 2));
> +	return regmap_update_bits(chip->data.regmap, RT1711H_RTCTRL8,
> +				  RT1711H_AUTOIDLEEN, enable ? 0 : RT1711H_AUTOIDLEEN);
>  }
>  
>  static int rt1711h_start_drp_toggling(struct tcpci *tcpci,
> -- 
> 2.7.4
>