From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
To: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH] ARM i.MX6: query silicon revision
Date: Sat, 1 Sep 2012 10:53:41 +0200 [thread overview]
Message-ID: <20120901085341.GI18708@game.jcrosoft.org> (raw)
In-Reply-To: <1346421308-24669-1-git-send-email-s.trumtrar@pengutronix.de>
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@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.
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next prev parent reply other threads:[~2012-09-01 8:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-31 13:55 Steffen Trumtrar
2012-09-01 8:53 ` Jean-Christophe PLAGNIOL-VILLARD [this message]
2012-09-03 7:00 ` Steffen Trumtrar
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