From: tony@atomide•com (Tony Lindgren)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 01/10] dt-bindings: bus: Minimal TI sysc interconnect target module binding
Date: Mon, 25 Sep 2017 07:25:20 -0700 [thread overview]
Message-ID: <20170925142520.GE4394@atomide.com> (raw)
In-Reply-To: <20170925063545.nn3gr5drea6o2g6m@squirrel.local>
* Matthijs van Duin <matthijsvanduin@gmail•com> [170924 23:36]:
> On Wed, Sep 20, 2017 at 03:46:12PM -0700, Tony Lindgren wrote:
> > +- compatible shall be one of the following generic types:
> > +
> > + "ti,sysc-type1"
> > + "ti,sysc-type2"
> > + "ti,sysc-type3"
>
> Is the meaning of these documented anywhere? I'm assuming one of them
> corresponds to the standard omap2/3 sysconfig/sysstatus:
Yes that's the type1 sysc. Pretty much the only documentation is what
we already have defined in the kernel, see:
$ grep "#define SYSC_TYPE" arch/arm/mach-omap2/omap_hwmod.h
> sysconfig:
> bit 0 rw auto-idle / auto-gating
> bit 1 -x soft-reset
> bit 2 rw wakeup enabled
> bits 3- 4 rw (slave) idle mode
> bit 5 rw emu-free
> bits 6- 7 z-
> bit 8 rw interface clock not gated when module in idle
> bit 9 rw functional clock not gated when module in idle
> bits 10-11 z-
> bits 12-13 rw standby mode (master idle mode)
> sysstatus:
> bit 0 r- reset done
>
> and one to the standard omap4/5 sysconfig:
>
> bit 0 rx soft-reset
> bit 1 rw emu-free
> bits 2- 3 rw (slave) idle mode
> bits 4- 5 rw standby mode (master idle mode)
> bits 6- 7 z-
> bits 8-15 rw auxiliary clocks (rare)
Yeah and that's what we call sysc type 2 in the kernel.
> What's the third? I'm not really aware of any other standard layout,
> just a whole bunch of non-standard ones.
The sysc type3 is what we have on am335x/ti81xx, see:
$ git grep -B10 -A1 "&omap_hwmod_sysc_type3" arch/arm/mach-omap2
> > + or one of the following derivative types for hardware
> > + needing special workarounds:
>
> To add to the collection: omap4/5 isp5 (part of iss) has:
> bit 0 r- auto-idle / auto-gating
> bit 1 rx soft-reset (requires special procedure)
> bits 2- 3 z-
> bits 4- 5 rw standby mode (master idle mode)
OK, I don't think we have that yet.
> > +Note that other SoCs, such as am335x can have multipe child devices. On am335x
> > +there are two MUSB instances, two USB PHY instances, and a single CPPI41 DMA
> > +instance as children of a single interconnet target module.
>
> ISS (omap4/5, dm814x) is also fun since it has top-level sysconfig, but
> most of the child modules (e.g. isp5 and simcop) also have their own
> sysconfig, and some child modules of simcop again have sysconfig.
Interesting. Sounds like there's yet another interconnect instance
lurking there similar to L4 ABE?
Regards,
Tony
next prev parent reply other threads:[~2017-09-25 14:25 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-20 22:46 [PATCHv3 00/10] Fix remaining issues to drop more omap platform data Tony Lindgren
2017-09-20 22:46 ` [PATCH 01/10] dt-bindings: bus: Minimal TI sysc interconnect target module binding Tony Lindgren
2017-09-25 6:35 ` Matthijs van Duin
2017-09-25 14:25 ` Tony Lindgren [this message]
2017-09-25 17:21 ` Matthijs van Duin
2017-09-25 17:44 ` Tony Lindgren
2017-09-27 9:56 ` Matthijs van Duin
2017-09-29 17:51 ` Tony Lindgren
2017-09-25 7:03 ` Matthijs van Duin
2017-09-25 14:37 ` Tony Lindgren
2017-09-20 22:46 ` [PATCH 02/10] ARM: dts: omap4: add fck under timer1 Tony Lindgren
2017-09-20 22:46 ` [PATCH 03/10] ARM: dts: omap4: add bus functionality to base PRCM nodes Tony Lindgren
2017-09-20 22:46 ` [PATCH 04/10] ARM: dts: omap4: add clkctrl nodes Tony Lindgren
2017-09-20 22:46 ` [PATCH 05/10] ARM: OMAP2+: Parse module IO range from dts for legacy "ti, hwmods" support Tony Lindgren
2017-09-20 22:46 ` [PATCH 06/10] ARM: OMAP2+: Populate legacy resources for dma and smartreflex Tony Lindgren
2017-09-20 22:46 ` [PATCH 07/10] bus: ti-sysc: Add minimal TI sysc interconnect target driver Tony Lindgren
2017-09-20 22:46 ` [PATCH 08/10] ARM: dts: Add nodes for missing omap4 interconnect target modules Tony Lindgren
2017-09-21 2:56 ` Matthijs van Duin
2017-09-21 14:27 ` Tony Lindgren
2017-09-20 22:46 ` [PATCH 09/10] ARM: dts: Configure SmartReflex only to idle the interconnect target module Tony Lindgren
2017-09-20 22:46 ` [PATCH 10/10] ARM: dts: Use ti-sysc module driver for omap4 musb Tony Lindgren
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