Rajendra Nayak <rnayak@xxxxxx> writes:
> The setup times to be programmed in the PRM module on OMAP
> (for clksetup, voltsetup etc) are board specific.
> They depend heavily on the PMIC used and even on different boards
> with the same PMIC, they vary based on the sleep/wake
> sequence used, system clock speed et al.
>
> This patch makes it possible for these setup values to be
> configured from different board files.
>
> Signed-off-by: Rajendra Nayak <rnayak@xxxxxx>
[...]
> diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
> index 2242d23..6f2fb51 100644
> --- a/arch/arm/mach-omap2/pm34xx.c
> +++ b/arch/arm/mach-omap2/pm34xx.c
> @@ -1084,6 +1084,9 @@ int omap3_pm_set_suspend_state(struct powerdomain *pwrdm, int state)
>
> void omap3_set_prm_setup_vc(struct prm_setup_vc *setup_vc)
> {
> + if (!setup_vc)
> + return;
> +
> prm_setup.clksetup = setup_vc->clksetup;
> prm_setup.voltsetup_time1 = setup_vc->voltsetup_time1;
> prm_setup.voltsetup_time2 = setup_vc->voltsetup_time2;
> @@ -1285,13 +1288,15 @@ static void __init configure_vc(void)
>
> void omap3_pm_early_init(struct omap_opp *mpu_opps,
> struct omap_opp *dsp_opps,
> - struct omap_opp *l3_opps)
> + struct omap_opp *l3_opps,
> + struct prm_setup_vc *setup_times)
> {
> prm_clear_mod_reg_bits(OMAP3430_OFFMODE_POL, OMAP3430_GR_MOD,
> OMAP3_PRM_POLCTRL_OFFSET);
>
> configure_vc();
> omap_pm_if_early_init(mpu_opps, dsp_opps, l3_opps);
> + omap3_set_prm_setup_vc(setup_times);
I think there's an ordering problem here since the configure_vc()
which uses the values is called before the setup_vc().
Also, if setup_times is passed as NULL, configure_vc() will be writing
wrong values with undefined results to the VC.
Also, if my proposed omap3_pm_init_vc() approach is taken and it is
optional, some sort of defaults should probably be set.
Kevin
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