On Sun, Apr 07, 2013 at 10:30:41AM +0800, Tang Yuantian-B29983 wrote: > Also send this patch to cpuf...@vger.kernel.org and linux...@vger.kernel.org > And better to rebase it on > git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git > > Thanks, > Yuantian
OK. Thanks. -Chenhui > > > -----Original Message----- > > From: Linuxppc-dev [mailto:linuxppc-dev- > > bounces+b29983=freescale....@lists.ozlabs.org] On Behalf Of Zhao Chenhui > > Sent: 2013年4月3日 21:09 > > To: linuxppc-dev@lists.ozlabs.org > > Subject: [PATCH 08/17] powerpc/85xx: add support to JOG feature using > > cpufreq interface > > > > From: chenhui zhao <chenhui.z...@freescale.com> > > > > Some MPC85xx SoCs like MPC8536 and P1022 have a JOG feature, which > > provides a dynamic mechanism to lower or raise the CPU core clock at > > runtime. > > > > This patch adds the support to change CPU frequency using the standard > > cpufreq interface. The ratio CORE to CCB can be 1:1(except MPC8536), 3:2, > > 2:1, 5:2, 3:1, 7:2 and 4:1. > > > > Two CPU cores on P1022 must not in the low power state during the > > frequency transition. The driver uses a flag to meet the requirement. > > > > The jog mode frequency transition process on the MPC8536 is similar to > > the deep sleep process. The driver need save the CPU state and restore it > > after CPU warm reset. > > > > Note: > > * The I/O peripherals such as PCIe and eTSEC may lose packets during > > the jog mode frequency transition. > > * The driver doesn't support MPC8536 Rev 1.0 due to a JOG erratum. > > Subsequent revisions of MPC8536 have corrected the erratum. > > > > Signed-off-by: Dave Liu <dave...@freescale.com> > > Signed-off-by: Li Yang <le...@freescale.com> > > Signed-off-by: Jerry Huang <chang-ming.hu...@freescale.com> > > Signed-off-by: Zhao Chenhui <chenhui.z...@freescale.com> _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev