Russell,
> > +static const char *omap4_dm_source_names[] __initdata = {
> > + "sys_ck",
> > + "omap_32k_fck",
> > + NULL
> > +};
> > +static struct clk **omap4_dm_source_clocks[2];
>
> Umm. struct clk **[2].
>
> > +static const int dm_timer_count = ARRAY_SIZE(omap4_dm_timers);
> > +
> > #else
> >
> > #error OMAP architecture not supported!
> > @@ -461,7 +508,8 @@ __u32
> omap_dm_timer_modify_idlect_mask(__u32 inputmask)
> > }
> > EXPORT_SYMBOL_GPL(omap_dm_timer_modify_idlect_mask);
> >
> > -#elif defined(CONFIG_ARCH_OMAP2) || defined (CONFIG_ARCH_OMAP3)
> > +#elif defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) || \
> > + defined(CONFIG_ARCH_OMAP4)
> >
> > struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer)
> > {
> > @@ -705,6 +753,10 @@ int __init omap_dm_timer_init(void)
> > dm_timers = omap3_dm_timers;
> > dm_source_names = (char **)omap3_dm_source_names;
> > dm_source_clocks = (struct clk
> **)omap3_dm_source_clocks;
> > + } else if (cpu_is_omap44xx()) {
> > + dm_timers = omap4_dm_timers;
> > + dm_source_names = (char **)omap4_dm_source_names;
> > + dm_source_clocks = (struct clk
> **)omap4_dm_source_clocks;
>
> which then gets casted to a struct clk **. These are two different
> objects. I don't think someone quite understood what they were
> doing here and threw a cast in to shut up the compiler warning:
>
> warning: assignment from incompatible pointer type
>
> This is *very* wrong and is a prime example of why casts are _bad_
> news. This cast is saying "THERE IS A BUG HERE" in 100ft
> high letters.
>
> What you want is:
>
> static struct clk *omap4_dm_source_clocks[2];
> ...
>
> dm_source_clocks = omap4_dm_source_clocks;
>
> This is because struct clk *[] is equivalent to struct clk **.
> (remember that arrays are handled in C as a pointer to the first
> array element.)
OK. I will fix this for OMAP4 now. Will create patch for OMAP2/3 bit later.
> As for the pointer to the array of names, why can't this be declared
> const and therefore that cast be removed?
I am sorry but didn't get this point.
dm_source_names = (char **)omap4_dm_source_names;
In this 'omap4_dm_source_names' is already const. The problem is
dm_source_names is declared as 'char ** ' and hence compiler cribs for right
reasons without cast.
Did you mean don't declare 'omap4_dm_source_name' as const ?
> TTOTD: Casts are bad news. It's far better to have stuff correctly
> typed in the first place.
Regards,
Santosh
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