linux-kernel - Re: [PATCH 1/7] net: dsa: b53: Add BroadSync HD register definitions

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Date:   Fri, 5 Nov 2021 19:29:53 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Martin Kaistra <martin.kaistra@...utronix.de>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>
Cc:     Richard Cochran <richardcochran@...il.com>,
        Kurt Kanzenbach <kurt@...utronix.de>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        John Stultz <john.stultz@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Stephen Boyd <sboyd@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 1/7] net: dsa: b53: Add BroadSync HD register definitions



On 11/4/2021 6:31 AM, Martin Kaistra wrote:
> From: Kurt Kanzenbach <kurt@...utronix.de>
> 
> Add register definitions for the BroadSync HD features of
> BCM53128. These will be used to enable PTP support.
> 
> Signed-off-by: Kurt Kanzenbach <kurt@...utronix.de>
> Signed-off-by: Martin Kaistra <martin.kaistra@...utronix.de>
> ---
>   drivers/net/dsa/b53/b53_regs.h | 38 ++++++++++++++++++++++++++++++++++
>   1 file changed, 38 insertions(+)
> 
> diff --git a/drivers/net/dsa/b53/b53_regs.h b/drivers/net/dsa/b53/b53_regs.h
> index b2c539a42154..c8a9d633f78b 100644
> --- a/drivers/net/dsa/b53/b53_regs.h
> +++ b/drivers/net/dsa/b53/b53_regs.h
> @@ -50,6 +50,12 @@
>   /* Jumbo Frame Registers */
>   #define B53_JUMBO_PAGE			0x40
>   
> +/* BroadSync HD Register Page */
> +#define B53_BROADSYNC_PAGE		0x90
> +
> +/* Traffic Remarking Register Page */
> +#define B53_TRAFFICREMARKING_PAGE	0x91
> +
>   /* EEE Control Registers Page */
>   #define B53_EEE_PAGE			0x92
>   
> @@ -479,6 +485,38 @@
>   #define   JMS_MIN_SIZE			1518
>   #define   JMS_MAX_SIZE			9724
>   
> +/*************************************************************************
> + * BroadSync HD Page Registers
> + *************************************************************************/
> +
> +#define B53_BROADSYNC_EN_CTRL1		0x00
> +#define B53_BROADSYNC_EN_CTRL2		0x01

This is a single register which is 16-bit wide, can you also add a 
comment to that extent like what is done for other register definitions?

> +#define B53_BROADSYNC_TS_REPORT_CTRL	0x02
> +#define B53_BROADSYNC_PCP_CTRL		0x03
> +#define B53_BROADSYNC_MAX_SDU		0x04


> +#define B53_BROADSYNC_TIMEBASE1		0x10

Single register which is 32-bit wide, no need to define the 
TIMEBASE1..4, just call it timebase.

> +#define B53_BROADSYNC_TIMEBASE2		0x11
> +#define B53_BROADSYNC_TIMEBASE3		0x12
> +#define B53_BROADSYNC_TIMEBASE4		0x13
> +#define B53_BROADSYNC_TIMEBASE_ADJ1	0x14

Likewise.

> +#define B53_BROADSYNC_TIMEBASE_ADJ2	0x15
> +#define B53_BROADSYNC_TIMEBASE_ADJ3	0x16
> +#define B53_BROADSYNC_TIMEBASE_ADJ4	0x17
> +#define B53_BROADSYNC_SLOT_CNT1		0x18
> +#define B53_BROADSYNC_SLOT_CNT2		0x19
> +#define B53_BROADSYNC_SLOT_CNT3		0x1a > +#define B53_BROADSYNC_SLOT_CNT4		0x1b

Likewise, 32-bit register.

> +#define B53_BROADSYNC_SLOT_ADJ1		0x1c
> +#define B53_BROADSYNC_SLOT_ADJ2		0x1d
> +#define B53_BROADSYNC_SLOT_ADJ3		0x1e
> +#define B53_BROADSYNC_SLOT_ADJ4		0x1f

And likewise

> +#define B53_BROADSYNC_CLS5_BW_CTRL	0x30
> +#define B53_BROADSYNC_CLS4_BW_CTRL	0x60
> +#define B53_BROADSYNC_EGRESS_TS		0x90
> +#define B53_BROADSYNC_EGRESS_TS_STS	0xd0
> +#define B53_BROADSYNC_LINK_STS1		0xe0
> +#define B53_BROADSYNC_LINK_STS2		0xe1

Likewise this is a 16-bit register.
> +
>   /*************************************************************************
>    * EEE Configuration Page Registers
>    *************************************************************************/
> 

-- 
Florian