Messages in this thread | | | From | Pintu Agarwal <> | Date | Fri, 27 May 2022 17:06:25 +0530 | Subject | Re: Queries: Using ifdef CONFIG condition in dts files |
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On Fri, 27 May 2022 at 15:34, Pintu Agarwal <pintu.ping@gmail.com> wrote: > > Hi, > > On Thu, 26 May 2022 at 19:53, T.Michael Turney <quic_mturney@quicinc.com> wrote: > > > > Kernel developers correct me where I go astray, but this seems like the > > CONFIG_XYZ value is not available in this file. This would explain why > > the disable case works. > > > > At top of dtsi file are you #include <config.h> or whatever the correct > > syntax is to see the CONFIG values? > > Thanks for your comments. > No, I could not find any specific config,h to be included to make the > CONFIG values visible to dts. >
BTW, I tried another approach but this also doesn't work when CONFIG is enabled. a) I have created a new header file such as myxyz.h and defined a new macro with config check. => myxyz.h +#ifdef CONFIG_XYZ +#define XYZ_CMA +#endif
b) Then I included the header file in my dtsi file and used ifdef with the new macro.
#include "myxyz.h"
#ifdef CONFIG_XYZ &reserved_mem { xyz_region: xyz_region { compatible = "shared-dma-pool"; reusable; size = <0x600000>; }; }; #endif
But unfortunately this approach also did not work when CONFIG is enabled. So, when config enable/disable its same behavior. However, if I put the #define in the dtsi file itself then it works as expected.
Thanks, Pintu
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