On Wed, May 20, 2015 at 07:25:41PM +0100, Russell King - ARM Linux wrote: > On Wed, May 20, 2015 at 09:58:51AM +0800, Shawn Guo wrote: > > On Wed, May 20, 2015 at 01:04:35AM +0800, Frank.Li@xxxxxxxxxxxxx wrote: > > > Frank Li (6): > > > arm: imx: power-off: change to syscon to access register > > > rtc: arm: imx: snvs: change use syscon to access register > > > Document: dt: fsl: snvs: change support syscon > > > arm: dts: imx: update snvs to use syscon access register > > > document: devicetree: input: imx: i.mx snvs power device tree bindings > > > arm: dts: imx6sx: enable snvs power key > > > > So, the series will break existing DTBs for RTC and poweroff, right? > > If this is unavoidable, should we at least have some warning messages > > telling users about his breakage? > > What's the justification for breaking existing DTBs? Really, this is > something we should strive to avoid, _and_ actually avoid by providing > backwards compatibility. Looking at the RTC code, it would be pretty trivial to do. Rather than passing around struct regmap, pass around the private data structure. Rename the regmap_* function calls to be private accessors. Implement a set of new accessors - if the private data has the regmap, use the regmap API. Otherwise, use the old method, and print a warning that an old DT is being used. -- FTTC broadband for 0.8mile line: currently at 10.5Mbps down 400kbps up according to speedtest.net. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
