On 01/21/2014 12:55 PM, Mark Brown wrote: > On Thu, Jan 16, 2014 at 01:32:30PM -0600, Nishanth Menon wrote: > >> - abb->base = devm_ioremap_resource(dev, res); > >> + abb->base = devm_ioremap_nocache(dev, res->start, resource_size(res)); > > devm_ioremap_resouce() should do the right thing if the memory region is > marked as uncacheable (with IORESOURCE_CACHEABLE not set). Since I > can't see the OF code actually setting that flag on the resources unless > I'm missing something this change isn't needed? > Without this change, on DRA7 I get: [ 0.579500] abb_mpu: 1060 <--> 1210 mV [ 0.580321] abb_ivahd: 1055 <--> 1250 mV [ 0.580583] ti_abb 4ae07e20.regulator-abb-dspeve: can't request region for resource [mem 0x4ae07e20-0x4ae07e2f] [ 0.580610] ti_abb: probe of 4ae07e20.regulator-abb-dspeve failed with error -16 [ 0.581216] abb_gpu: 1090 <--> 1280 mV with the change in the patch, I get: [ 0.589750] abb_mpu: 1060 <--> 1210 mV [ 0.590522] abb_ivahd: 1055 <--> 1250 mV [ 0.591331] abb_dspeve: 1055 <--> 1250 mV [ 0.592097] abb_gpu: 1090 <--> 1280 mV reference dts: https://github.com/nmenon/linux-2.6-playground/blob/abb-rev-v3.14-rc1-vnext-20140121/arch/arm/boot/dts/dra7.dtsi#L562 -- Regards, Nishanth Menon -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
