linux-kernel - Re: [PATCH v4 3/3] watchdog: sama5d4_wdt: addition of sam9x60 compatible watchdog

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Date:   Sat, 16 Nov 2019 08:20:51 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Eugen.Hristev@...rochip.com
Cc:     wim@...ux-watchdog.org, robh+dt@...nel.org,
        alexandre.belloni@...tlin.com, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Nicolas.Ferre@...rochip.com, linux-watchdog@...r.kernel.org
Subject: Re: [PATCH v4 3/3] watchdog: sama5d4_wdt: addition of sam9x60
 compatible watchdog

On Fri, Nov 15, 2019 at 08:30:18AM +0000, Eugen.Hristev@...rochip.com wrote:
> From: Eugen Hristev <eugen.hristev@...rochip.com>
> 
> Add support for SAM9X60 WDT into sama5d4_wdt.
> This means that this driver gets a flag inside the data struct
> that represents the sam9x60 support.
> This flag differentiates between the two hardware blocks, and is set
> according to the compatible of the driver instantiation.
> 
> Signed-off-by: Eugen Hristev <eugen.hristev@...rochip.com>
> ---
> Changes in v4:
> - check compatible with different of_ function
> - call irq parse and map only if need_irq
> - changed tabbing in struct defintion
> 
> Changes in v3:
> - changed need_irq to bool, instead of a single bit variable.
> - the platform data config struct is gone now, changed to a pointer to a bool
> to have the sam9x60_support as 'true', pointing to a static bool with true value.
> Can have a better solution than this ?
> - the specific sam9x60_support flag is assigned at probe time, corresponding
> to the flag value in .data
> 
>  drivers/watchdog/at91sam9_wdt.h |  14 ++++++
>  drivers/watchdog/sama5d4_wdt.c  | 109 +++++++++++++++++++++++++++++++---------
>  2 files changed, 98 insertions(+), 25 deletions(-)
> 
> diff --git a/drivers/watchdog/at91sam9_wdt.h b/drivers/watchdog/at91sam9_wdt.h
> index abfe34d..4b3bd1d 100644
> --- a/drivers/watchdog/at91sam9_wdt.h
> +++ b/drivers/watchdog/at91sam9_wdt.h
> @@ -24,7 +24,10 @@
>  #define AT91_WDT_MR		0x04			/* Watchdog Mode Register */
>  #define  AT91_WDT_WDV		(0xfffUL << 0)		/* Counter Value */
>  #define  AT91_WDT_SET_WDV(x)	((x) & AT91_WDT_WDV)
> +#define  AT91_SAM9X60_PERIODRST	BIT(4)		/* Period Reset */
> +#define  AT91_SAM9X60_RPTHRST	BIT(5)		/* Minimum Restart Period */
>  #define  AT91_WDT_WDFIEN	BIT(12)		/* Fault Interrupt Enable */
> +#define  AT91_SAM9X60_WDDIS	BIT(12)		/* Watchdog Disable */
>  #define  AT91_WDT_WDRSTEN	BIT(13)		/* Reset Processor */
>  #define  AT91_WDT_WDRPROC	BIT(14)		/* Timer Restart */
>  #define  AT91_WDT_WDDIS		BIT(15)		/* Watchdog Disable */
> @@ -37,4 +40,15 @@
>  #define  AT91_WDT_WDUNF		BIT(0)		/* Watchdog Underflow */
>  #define  AT91_WDT_WDERR		BIT(1)		/* Watchdog Error */
>  
> +#define AT91_SAM9X60_VR		0x08			/* Watchdog Timer Value Register */
> +
> +#define AT91_SAM9X60_WLR		0x0c
> +#define  AT91_SAM9X60_COUNTER	(0xfffUL << 0)		/* Watchdog Period Value */
> +#define  AT91_SAM9X60_SET_COUNTER(x)	((x) & AT91_SAM9X60_COUNTER)
> +
> +#define AT91_SAM9X60_IER		0x14		/* Interrupt Enable Register */
> +#define  AT91_SAM9X60_PERINT		BIT(0)		/* Period Interrupt Enable */
> +#define AT91_SAM9X60_IDR		0x18		/* Interrupt Disable Register */
> +#define AT91_SAM9X60_ISR		0x1c		/* Interrupt Status Register */
> +

Lots of line-too-long checkpatch warnings. Please avoid.

Thanks,
Guenter