[spi-devel-general] [PATCH v2 2/3] ep93xx: added chip revision reading function

[H Hartley Sweeten]

On Thursday, March 18, 2010 10:00 AM, Mika Westerberg wrote:
> Added a new function: ep93xx_chip_revision() which reads chip revision from the
> sysconfig register.
> 
> Signed-off-by: Mika Westerberg <mika.westerberg at iki.fi>

Hello Mika,

I'm ok with this part of your patch series.

Acked-by: H Hartley Sweeten <hsweeten at visionengravers.com>


> ---
>  arch/arm/mach-ep93xx/core.c                  |   14 ++++++++++++++
>  arch/arm/mach-ep93xx/include/mach/platform.h |    8 ++++++++
>  2 files changed, 22 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
> index 90fb591..07572bb 100644
> --- a/arch/arm/mach-ep93xx/core.c
> +++ b/arch/arm/mach-ep93xx/core.c
> @@ -222,6 +222,20 @@ void ep93xx_devcfg_set_clear(unsigned int set_bits, unsigned int clear_bits)
>  }
>  EXPORT_SYMBOL(ep93xx_devcfg_set_clear);
>  
> +/**
> + * ep93xx_chip_revision() - returns the EP93xx chip revision
> + *
> + * See <mach/platform.h> for more information.
> + */
> +unsigned int ep93xx_chip_revision(void)
> +{
> +	unsigned int v;
> +
> +	v = __raw_readl(EP93XX_SYSCON_SYSCFG);
> +	v &= EP93XX_SYSCON_SYSCFG_REV_MASK;
> +	v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT;
> +	return v;
> +}
>  
>  /*************************************************************************
>   * EP93xx peripheral handling
> diff --git a/arch/arm/mach-ep93xx/include/mach/platform.h b/arch/arm/mach-ep93xx/include/mach/platform.h
> index c6dc14d..b663390 100644
> --- a/arch/arm/mach-ep93xx/include/mach/platform.h
> +++ b/arch/arm/mach-ep93xx/include/mach/platform.h
> @@ -33,6 +33,14 @@ static inline void ep93xx_devcfg_clear_bits(unsigned int bits)
>  	ep93xx_devcfg_set_clear(0x00, bits);
>  }
>  
> +#define EP93XX_CHIP_REV_D0	3
> +#define EP93XX_CHIP_REV_D1	4
> +#define EP93XX_CHIP_REV_E0	5
> +#define EP93XX_CHIP_REV_E1	6
> +#define EP93XX_CHIP_REV_E2	7
> +
> +unsigned int ep93xx_chip_revision(void);
> +
>  void ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr);
>  void ep93xx_register_i2c(struct i2c_gpio_platform_data *data,
>  			 struct i2c_board_info *devices, int num);