linux-kernel - Re: [PATCH 1/4] arm: omap2+: add missing HWMOD_NO

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Date:	Sat, 24 Oct 2015 12:09:38 +0200
From:	Neil Armstrong <narmstrong@...libre.com>
To:	Tony Lindgren <tony@...mide.com>
Cc:	Paul Walmsley <paul@...an.com>, linux-omap@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Brian Hutchinson <b.hutchman@...il.com>,
	Frode Isaksen <fisaksen@...libre.com>
Subject: Re: [PATCH 1/4] arm: omap2+: add missing HWMOD_NO_IDLEST in 81xx
 hwmod data

Hi,

2015-10-24 3:21 GMT+02:00 Tony Lindgren <tony@...mide.com>:
>
> Hi,
>
> * Neil Armstrong <narmstrong@...libre.com> [151022 02:19]:
> > Add missing HWMOD_NO_IDLEST hwmod flag for entries no
> > having omap4 clkctrl values.
>
> Have you checked this is the case both in dm814x and dm816x TRM?
> Also the documentation may not be complete FYI, might be also
> worth checking the legacy TI kernel tree to be sure.
>
> Regards,
>
> Tony
>
> > Cc: Brian Hutchinson <b.hutchman@...il.com>
> > Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
> > ---
> >  arch/arm/mach-omap2/omap_hwmod_81xx_data.c | 3 +++
> >  1 file changed, 3 insertions(+)
> >
> > diff --git a/arch/arm/mach-omap2/omap_hwmod_81xx_data.c b/arch/arm/mach-omap2/omap_hwmod_81xx_data.c
> > index b1288f5..6256052 100644
> > --- a/arch/arm/mach-omap2/omap_hwmod_81xx_data.c
> > +++ b/arch/arm/mach-omap2/omap_hwmod_81xx_data.c
> > @@ -144,6 +144,7 @@ static struct omap_hwmod dm81xx_l4_ls_hwmod = {
> >       .name           = "l4_ls",
> >       .clkdm_name     = "alwon_l3s_clkdm",
> >       .class          = &l4_hwmod_class,
> > +     .flags          = HWMOD_NO_IDLEST,
> >  };
In DM814x TRM, the CM_ALWON_L3_SLOW_CLKSTCTRL does not have IDLEST field.
Same in DM816x TRM.

> >
> >  /*
> > @@ -155,6 +156,7 @@ static struct omap_hwmod dm81xx_l4_hs_hwmod = {
> >       .name           = "l4_hs",
> >       .clkdm_name     = "alwon_l3_med_clkdm",
> >       .class          = &l4_hwmod_class,
> > +     .flags          = HWMOD_NO_IDLEST,
> >  };
In DM814x TRM, the CM_ALWON_L3_MED_CLKSTCTRL does not have IDLEST field.
Same in DM816x TRM.

> >
> >  /* L3 slow -> L4 ls peripheral interface running at 125MHz */
> > @@ -850,6 +852,7 @@ static struct omap_hwmod dm816x_emac0_hwmod = {
> >       .name           = "emac0",
> >       .clkdm_name     = "alwon_ethernet_clkdm",
> >       .class          = &dm816x_emac_hwmod_class,
> > +     .flags          = HWMOD_NO_IDLEST,
> >  };
In this particular case, the IDLEST is handled in the MDIO hwmod.

> >
> >  static struct omap_hwmod_ocp_if dm81xx_l4_hs__emac0 = {
> > --
> > 1.9.1

I'll check the TI tree to be sure...

Regards,
Neil
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