linux - Getting the device address by device tree file in C -


i working on linux; when linux starts dts (device tree), file loaded linux kernel.

my question is, there have way device address dts file using c lanugage?

for example:

some part of dts file like:

soc@ffe00000{     .......     i2c@112000{     .......     } }

i want device name(soc,i2c)，and address(ffe00000,112000)...

hi ck vir,

your question isn't clear. i'm assuming looking sort of function takes argument contents of dts file , returns bunch of (device, address) pairs. correct?

also, useful if told sort of device using. raspberry pi? beaglebone black? or full desktop computer? distro , version of linux using?

this might not looking for, while ago, used nice library posted here on github. instance, address device named "ethernet", following.

int err = dtree_open("/proc/device-tree"); if(err != 0) {     printf("failed open device tree\n");     exit(1); }  struct dtree_dev_t *eth = dtree_byname("ethernet"); if(eth == 0) {     printf("failed find device named \"ethernet\"\n");     exit(1); }  //print base address of ethernet hardware printf("base address of ethernet %i\n", eth->base);  dtree_dev_free(eth);  dtree_close();

i hope library useful me.

if doesn't help, trivial task implement dts parser in c. "language" dts isn't terribly complex. number of details regarding syntax can found here.

best, john


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