linux-kernel - Re: [PATCH V4 1/3] soc/tegra: pmc: Use BIT macro for register field definition

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Date:	Fri, 6 May 2016 15:12:25 +0100
From:	Jon Hunter <jonathanh@...dia.com>
To:	Laxman Dewangan <ldewangan@...dia.com>, <thierry.reding@...il.com>,
	<airlied@...ux.ie>, <swarren@...dotorg.org>, <gnurou@...il.com>
CC:	<dri-devel@...ts.freedesktop.org>, <linux-tegra@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V4 1/3] soc/tegra: pmc: Use BIT macro for register field
 definition


On 06/05/16 11:45, Laxman Dewangan wrote:
> Use BIT macro for register field definition and make constant as U
> when using in shift operator like (3 << 30) to (3U << 30)
> 
> Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
> 
> ---
> Changes from V1:
> - Remove the indenting of line which is not for BIT macro usage.
> Changes from V2:
> - None
> ---
>  drivers/soc/tegra/pmc.c | 40 ++++++++++++++++++++--------------------
>  1 file changed, 20 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
> index bb17345..2c3f1f9 100644
> --- a/drivers/soc/tegra/pmc.c
> +++ b/drivers/soc/tegra/pmc.c
> @@ -45,28 +45,28 @@
>  #include <soc/tegra/pmc.h>
>  
>  #define PMC_CNTRL			0x0
> -#define  PMC_CNTRL_SYSCLK_POLARITY	(1 << 10)  /* sys clk polarity */
> -#define  PMC_CNTRL_SYSCLK_OE		(1 << 11)  /* system clock enable */
> -#define  PMC_CNTRL_SIDE_EFFECT_LP0	(1 << 14)  /* LP0 when CPU pwr gated */
> -#define  PMC_CNTRL_CPU_PWRREQ_POLARITY	(1 << 15)  /* CPU pwr req polarity */
> -#define  PMC_CNTRL_CPU_PWRREQ_OE	(1 << 16)  /* CPU pwr req enable */
> -#define  PMC_CNTRL_INTR_POLARITY	(1 << 17)  /* inverts INTR polarity */
> +#define PMC_CNTRL_SYSCLK_POLARITY	BIT(10) /* sys clk polarity */
> +#define PMC_CNTRL_SYSCLK_OE		BIT(11) /* system clock enable */
> +#define PMC_CNTRL_SIDE_EFFECT_LP0	BIT(14) /* LP0 when CPU pwr gated */
> +#define PMC_CNTRL_CPU_PWRREQ_POLARITY	BIT(15) /* CPU pwr req polarity */
> +#define PMC_CNTRL_CPU_PWRREQ_OE		BIT(16) /* CPU pwr req enable */
> +#define PMC_CNTRL_INTR_POLARITY		BIT(17)/* inverts INTR polarity */
>  
>  #define DPD_SAMPLE			0x020
> -#define  DPD_SAMPLE_ENABLE		(1 << 0)
> -#define  DPD_SAMPLE_DISABLE		(0 << 0)
> +#define DPD_SAMPLE_ENABLE		BIT(0)
> +#define DPD_SAMPLE_DISABLE		(0 << 0)
>  
>  #define PWRGATE_TOGGLE			0x30
> -#define  PWRGATE_TOGGLE_START		(1 << 8)
> +#define PWRGATE_TOGGLE_START		BIT(8)
>  
>  #define REMOVE_CLAMPING			0x34
>  
>  #define PWRGATE_STATUS			0x38
>  
>  #define PMC_SCRATCH0			0x50
> -#define  PMC_SCRATCH0_MODE_RECOVERY	(1 << 31)
> -#define  PMC_SCRATCH0_MODE_BOOTLOADER	(1 << 30)
> -#define  PMC_SCRATCH0_MODE_RCM		(1 << 1)
> +#define PMC_SCRATCH0_MODE_RECOVERY	BIT(31)
> +#define PMC_SCRATCH0_MODE_BOOTLOADER	BIT(30)
> +#define PMC_SCRATCH0_MODE_RCM		BIT(1)
>  #define  PMC_SCRATCH0_MODE_MASK		(PMC_SCRATCH0_MODE_RECOVERY | \
>  					 PMC_SCRATCH0_MODE_BOOTLOADER | \
>  					 PMC_SCRATCH0_MODE_RCM)
> @@ -77,14 +77,14 @@
>  #define PMC_SCRATCH41			0x140
>  
>  #define PMC_SENSOR_CTRL			0x1b0
> -#define PMC_SENSOR_CTRL_SCRATCH_WRITE	(1 << 2)
> -#define PMC_SENSOR_CTRL_ENABLE_RST	(1 << 1)
> +#define PMC_SENSOR_CTRL_SCRATCH_WRITE	BIT(2)
> +#define PMC_SENSOR_CTRL_ENABLE_RST	BIT(1)
>  
>  #define IO_DPD_REQ			0x1b8
> -#define  IO_DPD_REQ_CODE_IDLE		(0 << 30)
> -#define  IO_DPD_REQ_CODE_OFF		(1 << 30)
> -#define  IO_DPD_REQ_CODE_ON		(2 << 30)
> -#define  IO_DPD_REQ_CODE_MASK		(3 << 30)
> +#define IO_DPD_REQ_CODE_IDLE		(0 << 30)
> +#define IO_DPD_REQ_CODE_OFF		(1U << 30)
> +#define IO_DPD_REQ_CODE_ON		(2U << 30)
> +#define IO_DPD_REQ_CODE_MASK		(3U << 30)
>  
>  #define IO_DPD_STATUS			0x1bc
>  #define IO_DPD2_REQ			0x1c0
> @@ -96,10 +96,10 @@
>  #define PMC_SCRATCH54_ADDR_SHIFT	0
>  
>  #define PMC_SCRATCH55			0x25c
> -#define PMC_SCRATCH55_RESET_TEGRA	(1 << 31)
> +#define PMC_SCRATCH55_RESET_TEGRA	BIT(31)
>  #define PMC_SCRATCH55_CNTRL_ID_SHIFT	27
>  #define PMC_SCRATCH55_PINMUX_SHIFT	24
> -#define PMC_SCRATCH55_16BITOP		(1 << 15)
> +#define PMC_SCRATCH55_16BITOP		BIT(15)
>  #define PMC_SCRATCH55_CHECKSUM_SHIFT	16
>  #define PMC_SCRATCH55_I2CSLV1_SHIFT	0

Acked-by: Jon Hunter <jonathanh@...dia.com>

Cheers
Jon