Re: [PATCH 4/6] ARM: tegra: rework fuse.c

[Peter De Schrijver <pdeschrijver@nvidia.com>]

On Thu, Jan 02, 2014 at 01:37:43PM +0100, Linus Walleij wrote:
> On Thu, Dec 19, 2013 at 4:54 PM, Peter De Schrijver
> <pdeschrijver@nvidia.com> wrote:
> 
> > Reduce fuse.c to the minimum functionality required for the early bootstages.
> > Also export tegra_read_straps() for use by the fuse driver.
> >
> > Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
> 
> Aha, but why?
> 

The efuse driver in patch 2 of this series, adds the randomness, so we don't
need to add it here then?

> > -static void __init tegra20_fuse_init_randomness(void)
> > -{
> > -       u32 randomness[2];
> > -
> > -       randomness[0] = tegra_fuse_readl(FUSE_UID_LOW);
> > -       randomness[1] = tegra_fuse_readl(FUSE_UID_HIGH);
> > -
> > -       add_device_randomness(randomness, sizeof(randomness));
> > -}
> > -
> > -/* Applies to Tegra30 or later */
> > -static void __init tegra30_fuse_init_randomness(void)
> > -{
> > -       u32 randomness[7];
> > -
> > -       randomness[0] = tegra_fuse_readl(FUSE_VENDOR_CODE);
> > -       randomness[1] = tegra_fuse_readl(FUSE_FAB_CODE);
> > -       randomness[2] = tegra_fuse_readl(FUSE_LOT_CODE_0);
> > -       randomness[3] = tegra_fuse_readl(FUSE_LOT_CODE_1);
> > -       randomness[4] = tegra_fuse_readl(FUSE_WAFER_ID);
> > -       randomness[5] = tegra_fuse_readl(FUSE_X_COORDINATE);
> > -       randomness[6] = tegra_fuse_readl(FUSE_Y_COORDINATE);
> > -
> > -       add_device_randomness(randomness, sizeof(randomness));
> > -}
> 
> We still want to get this into the random pool right? Can it not simply
> be moved to a later initcall then?

Yes, it's done in the efuse driver now, do you think that's too late?

Cheers,

Peter.