Re: [RFC PATCH 0/3] ARM: use C pre-processor with dtc
From: Tony Lindgren <hidden>
Date: 2012-09-25 23:46:16
Also in:
linux-arm-kernel
Possibly related (same subject, not in this thread)
- 2012-09-27 · Re: [RFC PATCH 0/3] ARM: use C pre-processor with dtc · Jean-Christophe PLAGNIOL-VILLARD <hidden>
- 2012-09-27 · Re: [RFC PATCH 0/3] ARM: use C pre-processor with dtc · Stephen Warren <hidden>
- 2012-09-27 · Re: [RFC PATCH 0/3] ARM: use C pre-processor with dtc · Jean-Christophe PLAGNIOL-VILLARD <hidden>
- 2012-09-25 · Re: [RFC PATCH 0/3] ARM: use C pre-processor with dtc · Stephen Warren <hidden>
- 2012-09-25 · Re: [RFC PATCH 0/3] ARM: use C pre-processor with dtc · Mark Brown <hidden>
* Stephen Warren [off-list ref] [120925 12:53]:
On 09/25/2012 01:35 PM, Scott Wood wrote:quoted
Do you have an example of where you'd actually benefit from this? I'd think most things could either be done reasonably well with what's built into DTC (see what we've done in arch/powerpc/boot/dts/fsl), or would need math expression support in DTC (or has that been added?).Yes, support for basic integer math in cell values has indeed been recently added to upstream dtc. I don't believe this has been ported into the in-kernel dtc yet though. The primary motivation here is probably naming constants and associated readability. For example, instead of: nvidia,phy-reset-gpio = <&gpio 169 0>; /* gpio PV1 */ You could write: nvidia,phy-reset-gpio = <&gpio TEGRA_GPIO_PV1 0>; No more opaque numbers!
This would be nice indeed. Regards, Tony