[PATCH] ARM i.MX6: query silicon revision

[Jean-Christophe PLAGNIOL-VILLARD]

On 15:55 Fri 31 Aug     , Steffen Trumtrar wrote:
> Read silicon revision from ???-register.
> This is based on a7683867463481bfea84af4d60af832ddfb3da7f from u-boot.
> The address 0x020c8260 is used and decoded. I haven't found that in my
> datasheet, so I must trust the code to be correct.
> At least on a SabreLite v1.0 I get the correct version though.
> 
> Signed-off-by: Steffen Trumtrar <s.trumtrar at pengutronix.de>
> ---
>  arch/arm/mach-imx/imx6.c |   36 +++++++++++++++++++++++++++++++++++-
>  1 file changed, 35 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/mach-imx/imx6.c b/arch/arm/mach-imx/imx6.c
> index b6067d7..9c90444 100644
> --- a/arch/arm/mach-imx/imx6.c
> +++ b/arch/arm/mach-imx/imx6.c
> @@ -19,7 +19,7 @@
>  #include <common.h>
>  #include <io.h>
>  #include <sizes.h>
> -#include <mach/imx6-regs.h>
> +#include <mach/imx-regs.h>
>  
>  #include "gpio.h"
>  
> @@ -35,6 +35,40 @@ void *imx_gpio_base[] = {
>  
>  int imx_gpio_count = ARRAY_SIZE(imx_gpio_base) * 32;
>  
> +static u32 mx6_silicon_revision;
> +static char *mx6_rev_string = "unknown";
> +
> +int imx_silicon_revision(void)
> +{
> +	return mx6_silicon_revision;
> +}
> +
> +static int query_silicon_revision(void)
> +{
> +	void __iomem *anatop = (void *) MX6_ANATOP_BASE_ADDR;
> +	u32 rev, reg;
> +
> +	reg = readl(anatop + 0x260);
> +	/* read mx6 variant: quad, dual, solo */
> +	//rev = (reg >> 4) & 0xff000;
??

Best Regards,
J.