Linux/TDA2SX: how to use sysclk1 for dpll_abe? SDK 3.07

Murugan S22

Part Number: TDA2SX
Other Parts Discussed in Thread: TLV320AIC34

Tool/software: Linux

Hello all,

We are working on a custom board based on tda2sx.We are trying to interface tlv320aic34 to mcasp4 and mcasp7.We made the pinmux and other configuration on the device tree.While booting we are getting this error and mcasp realted inititialization is crashing.

clock: dpll_abe_ck failed transition to 'locked'
clock: dpll_abe_ck failed transition to 'locked'

We did some investigation and noticed that mcasp uses dpll_abe clk.On further investiagtion we found that dpll_abe is generated from sysclk2.In our custom board sysclk2 crystal osc is not mounted.How I can make dpll_abe use sysclk1 instead?Which files should i modify?

SDK version:3.07

Regards,

Murugan S

over 6 years ago

0 Murugan S22 over 6 years ago

Expert 1240 points

Any update on this?

0 Misael Lopez Cruz over 6 years ago in reply to Murugan S22

TI__Genius 9295 points

Murugan,

Try reparenting using the assigned-clock-parents property in atl node:

&atl {
assigned-clocks = <&abe_dpll_sys_clk_mux>,
<&atl_gfclk_mux>,
<&dpll_abe_ck>,
<&dpll_abe_m2x2_ck>,
<&atl_clkin1_ck>,
<&atl_clkin2_ck>;
assigned-clock-parents = <&sys_clkin2>, <&dpll_abe_m2_ck>;
assigned-clock-rates = <0>, <0>, <180633600>, <361267200>,
<11289600>, <11289600>;

More specifically, try replacing sys_clkin2 with sys_clkin1. Update the rate of dpll_abe_m2x2_ck accordingly, atl_clkin1_ck and atl_clkin2_ck accordingly.

0 Murugan S22 over 6 years ago in reply to Misael Lopez Cruz

Expert 1240 points

Hi Misael,

We are using 20MHz crystal for sysclk1.Can you guide how to select the rates of dpll_abe_m2x2_ck and atl_clkin1_ck and atl_clkin2_ck?

Regards,

Murugan S

0 Misael Lopez Cruz over 6 years ago in reply to Murugan S22

TI__Genius 9295 points

Try setting dpll_abe_m2x2_ck=122880000, atl_clkin_ck=12288000. ATL should divide the DPLL_ABE output by /10 and McASP clkdiv by /8.

0 Misael Lopez Cruz over 6 years ago in reply to Misael Lopez Cruz

TI__Genius 9295 points

Did above suggested clock rates work for you?

0 Murugan S22 over 6 years ago in reply to Misael Lopez Cruz

Expert 1240 points

Hi Misael,

The errors related to abe_dll lock are gone. We are still working on the aic.We don't have no provision to probe the clock since no resistors were placed.I will update if it starts working.

Regards,

Murugan S

0 Misael Lopez Cruz over 6 years ago in reply to Murugan S22

TI__Genius 9295 points

OK - I'll close this thread. Please create a new e2e thread if there are further questions.

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Linux/TDA2SX: how to use sysclk1 for dpll_abe? SDK 3.07