linux-kernel - Re: [PATCH 2/9] watchdog: of_xilinx

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Date:   Thu, 16 Jan 2020 07:04:12 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Srinivas Neeli <srinivas.neeli@...inx.com>,
        michal.simek@...inx.com, shubhrajyoti.datta@...inx.com,
        sgoud@...inx.com
Cc:     wim@...ux-watchdog.org, linux-watchdog@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        git@...inx.com
Subject: Re: [PATCH 2/9] watchdog: of_xilinx_wdt: Used BIT macro

On 1/16/20 5:26 AM, Srinivas Neeli wrote:
> From: Srinivas Goud <srinivas.goud@...inx.com>
> 
> Used BIT macro instead of mask value.
> 
> Signed-off-by: Srinivas Goud <srinivas.goud@...inx.com>
> Signed-off-by: Michal Simek <michal.simek@...inx.com>
> ---
>   drivers/watchdog/of_xilinx_wdt.c | 8 ++++----
>   1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/watchdog/of_xilinx_wdt.c b/drivers/watchdog/of_xilinx_wdt.c
> index 00549164b3d7..0d7df2370db7 100644
> --- a/drivers/watchdog/of_xilinx_wdt.c
> +++ b/drivers/watchdog/of_xilinx_wdt.c
> @@ -24,12 +24,12 @@
>   #define XWT_TBR_OFFSET      0x8 /* Timebase Register Offset */
>   
>   /* Control/Status Register Masks  */
> -#define XWT_CSR0_WRS_MASK   0x00000008 /* Reset status */
> -#define XWT_CSR0_WDS_MASK   0x00000004 /* Timer state  */
> -#define XWT_CSR0_EWDT1_MASK 0x00000002 /* Enable bit 1 */
> +#define XWT_CSR0_WRS_MASK	BIT(3) /* Reset status */
> +#define XWT_CSR0_WDS_MASK	BIT(2) /* Timer state  */
> +#define XWT_CSR0_EWDT1_MASK	BIT(1) /* Enable bit 1 */
>   
>   /* Control/Status Register 0/1 bits  */
> -#define XWT_CSRX_EWDT2_MASK 0x00000001 /* Enable bit 2 */
> +#define XWT_CSRX_EWDT2_MASK	BIT(0) /* Enable bit 2 */
>   
>   /* SelfTest constants */
>   #define XWT_MAX_SELFTEST_LOOP_COUNT 0x00010000
> 
Using bitops also requires including linux/bits.h explicitly.

Guenter