linux-kernel - Re: [PATCH 06/15] usb: typec: tcpci: use GENMASK() for TCPC_MSG_HDR_INFO

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Message-ID: <ZqoUeUN96bnXO7qB@kuha.fi.intel.com>
Date: Wed, 31 Jul 2024 13:39:53 +0300
From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To: André Draszik <andre.draszik@...aro.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Peter Griffin <peter.griffin@...aro.org>,
	Tudor Ambarus <tudor.ambarus@...aro.org>,
	Will McVicker <willmcvicker@...gle.com>,
	Badhri Jagan Sridharan <badhri@...gle.com>, kernel-team@...roid.com,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 06/15] usb: typec: tcpci: use GENMASK() for
 TCPC_MSG_HDR_INFO_REV

On Wed, Jul 10, 2024 at 11:36:13AM +0100, André Draszik wrote:
> Convert field TCPC_MSG_HDR_INFO_REV from register TCPC_MSG_HDR_INFO to
> using GENMASK() and FIELD_PREP() so as to keep using a similar approach
> for all fields.
> 
> Signed-off-by: André Draszik <andre.draszik@...aro.org>

Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>

> ---
>  drivers/usb/typec/tcpm/tcpci.c | 2 +-
>  include/linux/usb/tcpci.h      | 3 +--
>  2 files changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c
> index 5ad05a5bbbd1..ad5c9d5bf6a9 100644
> --- a/drivers/usb/typec/tcpm/tcpci.c
> +++ b/drivers/usb/typec/tcpm/tcpci.c
> @@ -456,7 +456,7 @@ static int tcpci_set_roles(struct tcpc_dev *tcpc, bool attached,
>  	unsigned int reg;
>  	int ret;
>  
> -	reg = PD_REV20 << TCPC_MSG_HDR_INFO_REV_SHIFT;
> +	reg = FIELD_PREP(TCPC_MSG_HDR_INFO_REV, PD_REV20);
>  	if (role == TYPEC_SOURCE)
>  		reg |= TCPC_MSG_HDR_INFO_PWR_ROLE;
>  	if (data == TYPEC_HOST)
> diff --git a/include/linux/usb/tcpci.h b/include/linux/usb/tcpci.h
> index 80652d4f722e..3cd61e9f73b3 100644
> --- a/include/linux/usb/tcpci.h
> +++ b/include/linux/usb/tcpci.h
> @@ -129,9 +129,8 @@
>  
>  #define TCPC_MSG_HDR_INFO		0x2e
>  #define TCPC_MSG_HDR_INFO_DATA_ROLE	BIT(3)
> +#define TCPC_MSG_HDR_INFO_REV		GENMASK(2, 1)
>  #define TCPC_MSG_HDR_INFO_PWR_ROLE	BIT(0)
> -#define TCPC_MSG_HDR_INFO_REV_SHIFT	1
> -#define TCPC_MSG_HDR_INFO_REV_MASK	0x3
>  
>  #define TCPC_RX_DETECT			0x2f
>  #define TCPC_RX_DETECT_HARD_RESET	BIT(5)
> 
> -- 
> 2.45.2.803.g4e1b14247a-goog

-- 
heikki