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| Started by | Pali Rohár <pali.rohar@gmail.com> |
|---|---|
| First post | 2016-01-24 21:30 +0100 |
| Last post | 2016-01-25 19:20 +0100 |
| Articles | 4 — 3 participants |
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Missing OMAP PM layer Pali Rohár <pali.rohar@gmail.com> - 2016-01-24 21:30 +0100
Re: Missing OMAP PM layer Tony Lindgren <tony@atomide.com> - 2016-01-25 17:40 +0100
Re: Missing OMAP PM layer Pali Rohár <pali.rohar@gmail.com> - 2016-01-25 18:30 +0100
Re: Missing OMAP PM layer Kevin Hilman <khilman@baylibre.com> - 2016-01-25 19:20 +0100
| From | Pali Rohár <pali.rohar@gmail.com> |
|---|---|
| Date | 2016-01-24 21:30 +0100 |
| Subject | Missing OMAP PM layer |
| Message-ID | <qUzsm-1Ab-13@gated-at.bofh.it> |
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Hello, make menuconfig allows me to choose "OMAP PM layer selection" and the only one option is CONFIG_OMAP_PM_NOOP "No-op/debug PM layer". What does it mean? Power manager is noop? I see that it has only two corresponding files in mainline kernel: arch/arm/mach-omap2/omap-pm.h arch/arm/mach-omap2/omap-pm-noop.c Nokia's kernels (for N900 and N950) had also: arch/arm/mach-omap2/omap-pm-srf.c Can somebody explain it what happened with omap power management? Looks like that omap-pm.h provides some API, but the only implementation is noop which do nothing. -- Pali Rohár pali.rohar@gmail.com
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| From | Tony Lindgren <tony@atomide.com> |
|---|---|
| Date | 2016-01-25 17:40 +0100 |
| Message-ID | <qUSll-6Ia-37@gated-at.bofh.it> |
| In reply to | #1315972 |
* Pali Rohár <pali.rohar@gmail.com> [160124 12:24]: > Hello, > > make menuconfig allows me to choose "OMAP PM layer selection" and the > only one option is CONFIG_OMAP_PM_NOOP "No-op/debug PM layer". > > What does it mean? Power manager is noop? > > I see that it has only two corresponding files in mainline kernel: > arch/arm/mach-omap2/omap-pm.h > arch/arm/mach-omap2/omap-pm-noop.c > > Nokia's kernels (for N900 and N950) had also: > arch/arm/mach-omap2/omap-pm-srf.c > > Can somebody explain it what happened with omap power management? > > Looks like that omap-pm.h provides some API, but the only implementation > is noop which do nothing. I believe none of that is needed any longer in mainline. Kevin, care to descrbibe what should be done here? Regards, Tony
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| From | Pali Rohár <pali.rohar@gmail.com> |
|---|---|
| Date | 2016-01-25 18:30 +0100 |
| Message-ID | <qUT7K-7lX-49@gated-at.bofh.it> |
| In reply to | #1316979 |
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On Monday 25 January 2016 17:34:42 Tony Lindgren wrote: > * Pali Rohár <pali.rohar@gmail.com> [160124 12:24]: > > Hello, > > > > make menuconfig allows me to choose "OMAP PM layer selection" and > > the only one option is CONFIG_OMAP_PM_NOOP "No-op/debug PM layer". > > > > What does it mean? Power manager is noop? > > > > I see that it has only two corresponding files in mainline kernel: > > arch/arm/mach-omap2/omap-pm.h > > arch/arm/mach-omap2/omap-pm-noop.c > > > > Nokia's kernels (for N900 and N950) had also: > > arch/arm/mach-omap2/omap-pm-srf.c > > > > Can somebody explain it what happened with omap power management? > > > > Looks like that omap-pm.h provides some API, but the only > > implementation is noop which do nothing. > > I believe none of that is needed any longer in mainline. Ok, and what was that omap-pm? Do you know what Nokia omap-pm-srf.c do? -- Pali Rohár pali.rohar@gmail.com
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| From | Kevin Hilman <khilman@baylibre.com> |
|---|---|
| Date | 2016-01-25 19:20 +0100 |
| Message-ID | <qUTU5-7YI-1@gated-at.bofh.it> |
| In reply to | #1316979 |
Tony Lindgren <tony@atomide.com> writes: > * Pali Rohár <pali.rohar@gmail.com> [160124 12:24]: >> Hello, >> >> make menuconfig allows me to choose "OMAP PM layer selection" and the >> only one option is CONFIG_OMAP_PM_NOOP "No-op/debug PM layer". >> >> What does it mean? Power manager is noop? >> >> I see that it has only two corresponding files in mainline kernel: >> arch/arm/mach-omap2/omap-pm.h >> arch/arm/mach-omap2/omap-pm-noop.c >> >> Nokia's kernels (for N900 and N950) had also: >> arch/arm/mach-omap2/omap-pm-srf.c >> >> Can somebody explain it what happened with omap power management? >> >> Looks like that omap-pm.h provides some API, but the only implementation >> is noop which do nothing. > > I believe none of that is needed any longer in mainline. > > Kevin, care to descrbibe what should be done here? We had created the OMAP PM layer as a pluggable layer where we could experiment with different approaches for adding constratints, etc. I can't remember anymore what all was in there, but we gutted most of it after switching to runtime PM. The SRF was a "shared resource framework" that came out of a TI kernel that was never accepted upstream either, but was one of the implementation of the OMAP PM layer. Kevin
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