Gpmc clock speed in dm8148 processor

Abhishek Kumar47

HI,

I am using custom board having ti-dm8148 processor , I want to see the current frequency of gpmc clock using debug file system. But after doing mount -t debugfs none /sys/kernel/debug there is no file related to gpmc clock.

Please tell me how to see gpmc clock by this way or any other alternate way

Thanks & Regards

Abhishek Kumar

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

Moving this to the DM814X forum.

0 Pavel Botev over 9 years ago

TI__Guru**** 170625 points

Hi Abhishek,

Below are the steps to see the gpmc clock path and default frequency:

root@dm814x-evm:~# mount -t debugfs debugfs /sys/kernel/debug
root@dm814x-evm:~# cd /sys/kernel/debug/clock
root@dm814x-evm:/sys/kernel/debug/clock# ls -lR | grep gpmc
drwxr-xr-x 2 root root 0 Jan 1 1970 gpmc_fck
./osc0_clkin_ck/l3_dpll_clkin_ck/l3_dpll_ck/sysclk4_ck/sysclk6_ck/gpmc_fck:
root@dm814x-evm:/sys/kernel/debug/clock# cd osc0_clkin_ck/l3_dpll_clkin_ck/l3_dpll_ck/sysclk4_ck/sysclk6_ck/gpmc_fck/
root@dm814x-evm:/sys/kernel/debug/clock/osc0_clkin_ck/l3_dpll_clkin_ck/l3_dpll_ck/sysclk4_ck/sysclk6_ck/gpmc_fck# cat rate
100000000

All this fully described in the below wiki page:
processors.wiki.ti.com/.../TI81XX_PSP_PM_CLOCK_FRAMEWORK_User_Guide

Regards,
Pavel

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Gpmc clock speed in dm8148 processor