On 01/13/2014 11:03 PM, Paul Walmsley wrote: > On 12/19/2013 04:05 PM, Stephen Warren wrote: >> On 12/19/2013 05:49 AM, Paul Walmsley wrote: >>> Add basic DT bindings for the DFLL IP block for the NVIDIA Tegra114 SoC. >>> diff --git a/Documentation/devicetree/bindings/clock/nvidia,tegra114-dfll.txt b/Documentation/devicetree/bindings/clock/nvidia,tegra114-dfll.txt >>> +- clock-names : Must contain an array of strings, one per 'clocks' >>> + two-cell array. The position in the array of these >> clock-names defines the set of entries in clocks, not the other way around. > > Hmm. If one refers to the DT clock binding documentation, it lists the > 'clock-names' property as optional, and the 'clocks' property as mandatory: > > ----- > > |==Clock consumers== > > Required properties: > clocks: List of phandle and clock specifier pairs, one pair > for each clock input to the device. Note: if the > clock provider specifies '0' for #clock-cells, then > only the phandle portion of the pair will appear. > > Optional properties: > clock-names: List of clock input name strings sorted in the same > order as the clocks property. Consumers drivers > will use clock-names to match clock input names > with clocks specifiers. > > ----- > | > > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/clock/clock-bindings.txt#n47 > > Considering that of_clk_get() doesn't require names, it certainly > appears to be the way that the original patch described it (modulo the > bit about 'cells'; which has been fixed.) If the binding defines that clock must exist at certain indices in the clock property, and clock-names isn't used, then the clocks property defines which clocks must exist. However, if the binding is defining clock names, then the clock-names property is the master that defines which clocks exist. In this case, the index of entries in the clocks property is undefined by the binding; it must simply match the clock-names property, which can be arbitrarily ordered by the user. Since this is a new binding, we should use the clock-names style to ensure easy future backwards-compatible changes. -- 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
