Re: ARM errata 430973 on multi platform kernels (was: OMAP3-N900: Add microphone bias voltages)

2015-04-06 Thread Sebastian Reichel
Hi, On Sun, Apr 05, 2015 at 03:52:10PM +0200, Pali Rohár wrote: > > So I suggest to enable the IBE bit in the kernel (that part is > > already done) *and* in u-boot. > > > > -- Sebastian > > Yes. Code for both (U-Boot and linux kernel) exists and are > already included. > > In linux kernel cod

Re: ARM errata 430973 on multi platform kernels (was: OMAP3-N900: Add microphone bias voltages)

2015-04-05 Thread Pali Rohár
On Sunday 05 April 2015 15:45:28 Sebastian Reichel wrote: > Hi, > > On Sun, Apr 05, 2015 at 03:26:14PM +0200, Pali Rohár wrote: > > > > > Yes so it seems, and the bootloaders should really set > > > > > it. It's also disabled for multiplatform builds. > > > > > > > > These are now done in u-boot

Re: ARM errata 430973 on multi platform kernels (was: OMAP3-N900: Add microphone bias voltages)

2015-04-05 Thread Sebastian Reichel
Hi, On Sun, Apr 05, 2015 at 03:26:14PM +0200, Pali Rohár wrote: > > > > Yes so it seems, and the bootloaders should really set it. > > > > It's also disabled for multiplatform builds. > > > > > > These are now done in u-boot as of: v2015.04-rc4 > > > > > > http://git.denx.de/?p=u-boot.git;a=comm

Re: ARM errata 430973 on multi platform kernels (was: OMAP3-N900: Add microphone bias voltages)

2015-04-05 Thread Pali Rohár
On Sunday 05 April 2015 15:00:45 Sebastian Reichel wrote: > On Fri, Apr 03, 2015 at 02:21:48PM -0500, Robert Nelson wrote: > > >> And yes, for armhf userland one gets random oopses at > > >> least on the Nokia N900. AFAIK this is not true for all > > >> ARMv7 processors (especially non omaps), thou

Re: ARM errata 430973 on multi platform kernels (was: OMAP3-N900: Add microphone bias voltages)

2015-04-05 Thread Sebastian Reichel
On Fri, Apr 03, 2015 at 02:21:48PM -0500, Robert Nelson wrote: > >> And yes, for armhf userland one gets random oopses at least on the > >> Nokia N900. AFAIK this is not true for all ARMv7 processors > >> (especially non omaps), though. > >> > >> > http://www.spinics.net/lists/linux-omap/msg108511.

Re: ARM errata 430973 on multi platform kernels (was: OMAP3-N900: Add microphone bias voltages)

2015-04-03 Thread Pavel Machek
Hi! > Maybe an option would be to provide two cpu_v7_switch_mm > implementations (one with the errata and one without). Then > the system can start with the simple implementation. Once > the boot as progressed far enough to know, that the hardware > is affected by the errata, it could switch to th

Re: ARM errata 430973 on multi platform kernels (was: OMAP3-N900: Add microphone bias voltages)

2015-04-03 Thread Robert Nelson
>> And yes, for armhf userland one gets random oopses at least on the >> Nokia N900. AFAIK this is not true for all ARMv7 processors >> (especially non omaps), though. >> >> > http://www.spinics.net/lists/linux-omap/msg108511.html >> > >> > See also 5c86c5339c56 ("ARM: omap2plus_defconfig: Enable A

Re: ARM errata 430973 on multi platform kernels (was: OMAP3-N900: Add microphone bias voltages)

2015-04-03 Thread Tony Lindgren
* Sebastian Reichel [150403 09:37]: > Hi, > > On Wed, Apr 01, 2015 at 12:47:36PM -0700, Tony Lindgren wrote: > > > > OK I think debian is using v3.16 kernel > > > > > > Yes. It will be used for Debian jessie (not yet released) and the > > > N900 related drivers are enabled in the armmp flavour.

ARM errata 430973 on multi platform kernels (was: OMAP3-N900: Add microphone bias voltages)

2015-04-03 Thread Sebastian Reichel
Hi, On Wed, Apr 01, 2015 at 12:47:36PM -0700, Tony Lindgren wrote: > > > OK I think debian is using v3.16 kernel > > > > Yes. It will be used for Debian jessie (not yet released) and the > > N900 related drivers are enabled in the armmp flavour. Unfortunately > > it does not work together with th