linux-kernel - Re: [PATCH v1] usb: typec: tcpci: Refactor tcpc_presenting_cc1

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Message-ID: <20210310235424.GH195769@roeck-us.net>
Date:   Wed, 10 Mar 2021 15:54:24 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Badhri Jagan Sridharan <badhri@...gle.com>
Cc:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Kyle Tso <kyletso@...gle.com>, stable@...r.kernel.org
Subject: Re: [PATCH v1] usb: typec: tcpci: Refactor tcpc_presenting_cc1_rd
 macro

On Wed, Mar 10, 2021 at 02:35:36PM -0800, Badhri Jagan Sridharan wrote:
> Defining one macro instead of two for tcpc_presenting_*_rd.
> This is a follow up of the comment left by Heikki Krogerus.
> 
> https://patchwork.kernel.org/project/linux-usb/patch/
> 20210304070931.1947316-1-badhri@...gle.com/
> 
> Signed-off-by: Badhri Jagan Sridharan <badhri@...gle.com>

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

Guenter

> ---
>  drivers/usb/typec/tcpm/tcpci.c | 14 +++++---------
>  1 file changed, 5 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c
> index 027afd7dfdce..25b480752266 100644
> --- a/drivers/usb/typec/tcpm/tcpci.c
> +++ b/drivers/usb/typec/tcpm/tcpci.c
> @@ -24,14 +24,10 @@
>  #define	AUTO_DISCHARGE_PD_HEADROOM_MV		850
>  #define	AUTO_DISCHARGE_PPS_HEADROOM_MV		1250
>  
> -#define tcpc_presenting_cc1_rd(reg) \
> +#define tcpc_presenting_rd(reg, cc) \
>  	(!(TCPC_ROLE_CTRL_DRP & (reg)) && \
> -	 (((reg) & (TCPC_ROLE_CTRL_CC1_MASK << TCPC_ROLE_CTRL_CC1_SHIFT)) == \
> -	  (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT)))
> -#define tcpc_presenting_cc2_rd(reg) \
> -	(!(TCPC_ROLE_CTRL_DRP & (reg)) && \
> -	 (((reg) & (TCPC_ROLE_CTRL_CC2_MASK << TCPC_ROLE_CTRL_CC2_SHIFT)) == \
> -	  (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT)))
> +	 (((reg) & (TCPC_ROLE_CTRL_## cc ##_MASK << TCPC_ROLE_CTRL_## cc ##_SHIFT)) == \
> +	  (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_## cc ##_SHIFT)))
>  
>  struct tcpci {
>  	struct device *dev;
> @@ -201,11 +197,11 @@ static int tcpci_get_cc(struct tcpc_dev *tcpc,
>  	*cc1 = tcpci_to_typec_cc((reg >> TCPC_CC_STATUS_CC1_SHIFT) &
>  				 TCPC_CC_STATUS_CC1_MASK,
>  				 reg & TCPC_CC_STATUS_TERM ||
> -				 tcpc_presenting_cc1_rd(role_control));
> +				 tcpc_presenting_rd(role_control, CC1));
>  	*cc2 = tcpci_to_typec_cc((reg >> TCPC_CC_STATUS_CC2_SHIFT) &
>  				 TCPC_CC_STATUS_CC2_MASK,
>  				 reg & TCPC_CC_STATUS_TERM ||
> -				 tcpc_presenting_cc2_rd(role_control));
> +				 tcpc_presenting_rd(role_control, CC2));
>  
>  	return 0;
>  }
> -- 
> 2.31.0.rc1.246.gcd05c9c855-goog
>