Hello Lee, On Tuesday, October 07, 2014 2:39 PM, Lee Jones wrote, > On Tue, 30 Sep 2014, Pankaj Dubey wrote: > > > Currently a syscon entity can be only registered directly through a > > platform device that binds to a dedicated syscon driver. However in > > certain use cases it is desirable to make a device used with another > > driver a syscon interface provider. > > > > For example, certain SoCs (e.g. Exynos) contain system controller > > blocks which perform various functions such as power domain control, > > CPU power management, low power mode control, but in addition contain > > certain IP integration glue, such as various signal masks, coprocessor > > power control, etc. In such case, there is a need to have a dedicated > > driver for such system controller but also share registers with other > > drivers. The latter is where the syscon interface is helpful. > > > > In case of DT based platforms, this patch decouples syscon object from > > syscon platform driver, and allows to create syscon objects first time > > when it is required by calling of syscon_regmap_lookup_by APIs and > > keep a list of such syscon objects along with syscon provider > > device_nodes and regmap handles. > > > > For non-DT based platforms, this patch keeps syscon platform driver > > structure so that syscon can be probed and such non-DT based drivers > > can use syscon_regmap_lookup_by_pdev API and access regmap handles. > > Once all users of "syscon_regmap_lookup_by_pdev" migrated to DT based, > > we can completely remove platform driver of syscon, and keep only > > helper functions to get regmap handles. > > > > Suggested-by: Arnd Bergmann <arnd@xxxxxxxx> > > Suggested-by: Tomasz Figa <tomasz.figa@xxxxxxxxx> > > Tested-by: Vivek Gautam <gautam.vivek@xxxxxxxxxxx> > > Tested-by: Javier Martinez Canillas <javier.martinez@xxxxxxxxxxxxxxx> > > Signed-off-by: Pankaj Dubey <pankaj.dubey@xxxxxxxxxxx> > > Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx> > > Tested-by: Heiko Stuebner <heiko@xxxxxxxxx> > > Reviewed-by: Heiko Stuebner <heiko@xxxxxxxxx> > > Applied for v3.19. I can't see this in 3.18-rc1, as this patch is one of dependency for many of Exynos PMU related patches, will you please queue this patch for 3.18-rc2, so that already ready to be in patches having this patch as dependency can be taken in. Thanks, Pankaj Dubey > > -- > Lee Jones > Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software > for ARM SoCs Follow Linaro: Facebook | Twitter | Blog -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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