Subject: [PATCHv2 06/10] ARM: DRA7: hwmod_data: Add mailbox hwmod data

From: [email-masked] (Tony Lindgren)
Date: Wed, 23 Jul 2014 02:24:51 -0700

* Tony Lindgren <[email-masked]> [140716 00:10]:
> * Suman Anna <[email-masked]> [140715 09:59]:
> > Hi Tony,
> > 
> > On 07/15/2014 08:30 AM, Tony Lindgren wrote:
> > > * Suman Anna <[email-masked]> [140711 14:47]:
> > >> Add the hwmod data for the 13 instances of the system mailbox
> > >> IP in DRA7 SoC. The patch is needed for performing a soft-reset
> > >> while configuring the respective mailbox instance, otherwise is
> > >> a non-essential change for functionality. The modules are smart
> > >> idled on reset, and the IP module mode is hardware controlled.
> > >>
> > >> Cc: Rajendra Nayak <[email-masked]>
> > >> Cc: Paul Walmsley <[email-masked]>
> > >> Signed-off-by: Suman Anna <[email-masked]>
> > >> ---
> > >>  arch/arm/mach-omap2/omap_hwmod_7xx_data.c | 305 ++++++++++++++++++++++++++++++
> > >>  1 file changed, 305 insertions(+)
> > >>
> > >> diff --git a/arch/arm/mach-omap2/omap_hwmod_7xx_data.c b/arch/arm/mach-omap2/omap_hwmod_7xx_data.c
> > >> index 20b4398..e35f5b1 100644
> > >> --- a/arch/arm/mach-omap2/omap_hwmod_7xx_data.c
> > >> +++ b/arch/arm/mach-omap2/omap_hwmod_7xx_data.c
> > >> @@ -939,6 +939,194 @@ static struct omap_hwmod dra7xx_i2c5_hwmod = {
> > >>  };
> > >>  
> > >>  /*
> > >> + * 'mailbox' class
> > >> + *
> > >> + */
> > >> +
> > >> +static struct omap_hwmod_class_sysconfig dra7xx_mailbox_sysc = {
> > >> +	.rev_offs	= 0x0000,
> > >> +	.sysc_offs	= 0x0010,
> > >> +	.sysc_flags	= (SYSC_HAS_RESET_STATUS | SYSC_HAS_SIDLEMODE |
> > >> +			   SYSC_HAS_SOFTRESET),
> > >> +	.idlemodes	= (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART),
> > >> +	.sysc_fields	= &omap_hwmod_sysc_type2,
> > >> +};
> > >> +
> > >> +static struct omap_hwmod_class dra7xx_mailbox_hwmod_class = {
> > >> +	.name	= "mailbox",
> > >> +	.sysc	= &dra7xx_mailbox_sysc,
> > >> +};
> > > 
> > > Hmm I'm seeing just the following MAILBOX_SYSCONFIG in at least
> > > am57xx TRM:
> > > 
> > > 31:4	RESERVED
> > > 3:2	SIDLEMODE	0 = force-idle 1 = no-idle, 2 = smart-idle, 3 = reserved
> > > 1	RESERVED
> > > 0	SOFTRESET
> > > 
> > > So it seems that SYSC_HAS_RESET_STATUS above is wrong? Can you guys
> > > please check.
> > 
> > The same SOFTRESET bit is used for both triggering the softreset and
> > reading the reset done status. Once you write a 1 to trigger a reset,
> > the bit will be cleared once the reset is done. This is no different
> > from OMAP4. The logic in _wait_softreset_complete in omap_hwmod.c was
> > already designed to work with this properly.
> 
> Oh OK, I guess I got it confused with SYSS_HAS_RESET_STATUS. Paul,
> want to ack this one if no other issues? I can then set this series
> into a branch against -rc1 that we can all merge in as needed as
> it seems that the driver changes may need this branch as a base too.

I have applied these into omap-for-v3.17/mailbox and merged also
into omap-for-v3.17/soc.

Regards,

Tony