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iio: adc: ltc2387: Update calculation of duty_offset_ns value #2728

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Merged
merged 1 commit into from
May 20, 2025
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iio: adc: ltc2387: Update calculation of duty_offset_ns value #2728

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4 changes: 4 additions & 0 deletions drivers/iio/adc/ltc2387.c
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Original file line number Diff line number Diff line change
Expand Up @@ -204,6 +204,10 @@
clk_gate_wf.duty_length_ns = ref_clk_period_ns * clk_en_time;
clk_gate_wf.duty_offset_ns = LTC2387_T_FIRSTCLK_NS;

if (clk_gate_wf.duty_offset_ns > clk_gate_wf.period_length_ns)
div64_u64_rem(clk_gate_wf.duty_offset_ns, clk_gate_wf.period_length_ns,
&clk_gate_wf.duty_offset_ns);

ret = pwm_set_waveform_might_sleep(ltc->clk_en, &clk_gate_wf, false);
if (ret < 0)
return ret;
Expand Down Expand Up @@ -238,7 +242,7 @@
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
temp = regulator_get_voltage(ltc->vref);
if (temp < 0)

Check warning on line 245 in drivers/iio/adc/ltc2387.c

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GitHub Actions / build_gcc_arm / build 

smatch: unsigned 'temp' is never less than zero.

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coccicheck: 6-10  WARNING  Unsigned expression compared with zero  temp < 0
return temp;

*val = (temp * 2) / 1000;
Expand Down
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