Sanjeev Premi <[email protected]> writes:
> This patch adds support for ARM running at 720MHz part.
>
> The 720MHz capability can be probed run-time by reading the
> PRODID.SKUID[3:0] at 0x4830A20C.
>
> [1] http://focus.ti.com/lit/ug/spruff1d/spruff1d.pdf
>
> Signed-off-by: Sanjeev Premi <[email protected]>
>
> ---
> arch/arm/mach-omap2/clock34xx.c | 6 ++++++
> arch/arm/mach-omap2/id.c | 11 +++++++++++
> arch/arm/plat-omap/include/mach/control.h | 7 +++++++
> arch/arm/plat-omap/include/mach/cpu.h | 2 ++
> 4 files changed, 26 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/clock34xx.c b/arch/arm/mach-omap2/clock34xx.c
> index 489556e..9b56af3 100644
> --- a/arch/arm/mach-omap2/clock34xx.c
> +++ b/arch/arm/mach-omap2/clock34xx.c
> @@ -1096,6 +1096,12 @@ static int __init omap2_clk_arch_init(void)
> if (!mpurate)
> return -EINVAL;
>
> + if ((mpurate == 720000000) && !omap3_has_720mhz()) {
> + printk(KERN_ERR "*** Silicon doesn't support 720MHz\n");
> +
> + mpurate = 600000000; /* Set to highest supported */
> + }
> +
This is very platform specific check here. We're not checking for any
other valid mpurate values here. I think we should leave it to the
(forthcoming) OPP layer to to validate the frequency etc.
I recommend just dropping the clock34xx.c changes and posting a patch
which just adds the new speed as a feature.
> /* REVISIT: not yet ready for 343x */
> if (clk_set_rate(&dpll1_ck, mpurate))
> printk(KERN_ERR "*** Unable to set MPU rate\n");
> diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c
> index d4d563b..e0b427a 100644
> --- a/arch/arm/mach-omap2/id.c
> +++ b/arch/arm/mach-omap2/id.c
> @@ -79,6 +79,7 @@ EXPORT_SYMBOL(omap_type);
> #define OMAP_TAP_DIE_ID_2 0x0220
> #define OMAP_TAP_DIE_ID_3 0x0224
>
> +
stray whitespace change
> #define read_tap_reg(reg) __raw_readl(tap_base + (reg))
>
> struct omap_id {
> @@ -180,6 +181,15 @@ void __init omap3_check_features(void)
> * TODO: Get additional info (where applicable)
> * e.g. Size of L2 cache.
> */
> +
> + /*
> + * Does it support 720MHz?
> + */
> + status = (OMAP3_SKUID_MASK & read_tap_reg(OMAP3_PRODID));
> +
Some comment here that the runtime detection of this feature is only
available on 35xx parts would be useful too.
Kevin
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