linux-kernel - Re: [PATCH v4 1/3] watchdog: sama5d4

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Date:   Sat, 16 Nov 2019 08:12:04 -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 1/3] watchdog: sama5d4_wdt: cleanup the bit definitions

On Fri, Nov 15, 2019 at 08:30:13AM +0000, Eugen.Hristev@...rochip.com wrote:
> From: Eugen Hristev <eugen.hristev@...rochip.com>
> 
> Cleanup the macro definitions to use BIT and align with two spaces.
> 
> Signed-off-by: Eugen Hristev <eugen.hristev@...rochip.com>

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

> ---
> Changes in v4:
> - added UL suffix to value macros to avoid compile warnings
> - modified file header to include new copyright and datasheet
> - include linux/bits.h
> 
> Changes in v3:
> - new patch as requested from review on ML
> 
>  drivers/watchdog/at91sam9_wdt.h | 34 +++++++++++++++++++---------------
>  1 file changed, 19 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/watchdog/at91sam9_wdt.h b/drivers/watchdog/at91sam9_wdt.h
> index 390941c..abfe34d 100644
> --- a/drivers/watchdog/at91sam9_wdt.h
> +++ b/drivers/watchdog/at91sam9_wdt.h
> @@ -4,33 +4,37 @@
>   *
>   * Copyright (C) 2007 Andrew Victor
>   * Copyright (C) 2007 Atmel Corporation.
> + * Copyright (C) 2019 Microchip Technology Inc. and its subsidiaries
>   *
>   * Watchdog Timer (WDT) - System peripherals regsters.
>   * Based on AT91SAM9261 datasheet revision D.
> + * Based on SAM9X60 datasheet.
>   *
>   */
>  
>  #ifndef AT91_WDT_H
>  #define AT91_WDT_H
>  
> +#include <linux/bits.h>
> +
>  #define AT91_WDT_CR		0x00			/* Watchdog Control Register */
> -#define		AT91_WDT_WDRSTT		(1    << 0)		/* Restart */
> -#define		AT91_WDT_KEY		(0xa5 << 24)		/* KEY Password */
> +#define  AT91_WDT_WDRSTT	BIT(0)			/* Restart */
> +#define  AT91_WDT_KEY		(0xa5UL << 24)		/* KEY Password */
>  
>  #define AT91_WDT_MR		0x04			/* Watchdog Mode Register */
> -#define		AT91_WDT_WDV		(0xfff << 0)		/* Counter Value */
> -#define			AT91_WDT_SET_WDV(x)	((x) & AT91_WDT_WDV)
> -#define		AT91_WDT_WDFIEN		(1     << 12)		/* Fault Interrupt Enable */
> -#define		AT91_WDT_WDRSTEN	(1     << 13)		/* Reset Processor */
> -#define		AT91_WDT_WDRPROC	(1     << 14)		/* Timer Restart */
> -#define		AT91_WDT_WDDIS		(1     << 15)		/* Watchdog Disable */
> -#define		AT91_WDT_WDD		(0xfff << 16)		/* Delta Value */
> -#define			AT91_WDT_SET_WDD(x)	(((x) << 16) & AT91_WDT_WDD)
> -#define		AT91_WDT_WDDBGHLT	(1     << 28)		/* Debug Halt */
> -#define		AT91_WDT_WDIDLEHLT	(1     << 29)		/* Idle Halt */
> +#define  AT91_WDT_WDV		(0xfffUL << 0)		/* Counter Value */
> +#define  AT91_WDT_SET_WDV(x)	((x) & AT91_WDT_WDV)
> +#define  AT91_WDT_WDFIEN	BIT(12)		/* Fault Interrupt Enable */
> +#define  AT91_WDT_WDRSTEN	BIT(13)		/* Reset Processor */
> +#define  AT91_WDT_WDRPROC	BIT(14)		/* Timer Restart */
> +#define  AT91_WDT_WDDIS		BIT(15)		/* Watchdog Disable */
> +#define  AT91_WDT_WDD		(0xfffUL << 16)		/* Delta Value */
> +#define  AT91_WDT_SET_WDD(x)	(((x) << 16) & AT91_WDT_WDD)
> +#define  AT91_WDT_WDDBGHLT	BIT(28)		/* Debug Halt */
> +#define  AT91_WDT_WDIDLEHLT	BIT(29)		/* Idle Halt */
>  
> -#define AT91_WDT_SR		0x08			/* Watchdog Status Register */
> -#define		AT91_WDT_WDUNF		(1 << 0)		/* Watchdog Underflow */
> -#define		AT91_WDT_WDERR		(1 << 1)		/* Watchdog Error */
> +#define AT91_WDT_SR		0x08		/* Watchdog Status Register */
> +#define  AT91_WDT_WDUNF		BIT(0)		/* Watchdog Underflow */
> +#define  AT91_WDT_WDERR		BIT(1)		/* Watchdog Error */
>  
>  #endif