On Wed, Dec 14, 2016 at 04:40:15PM +0800, John Hsu wrote: > On 12/13/2016 2:12 PM, Ben Zhang wrote: > > +static SOC_ENUM_SINGLE_DECL( > > + nau8825_class_g_enum, SND_SOC_NOPM, 0, nau8825_class_g_src); > > + > The register SND_SOC_NOPM can't use at the enum put and get function > in the older kernel. Ex. kernel 3.14. The driver has to modify the > DAPM in the platform with older kernel. Older kernels are not relevant upstream. If you need to backport that should be handled separately.
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