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clk: si5351: fix .recalc_rate for multisynth 6-7 

MS6 and MS7 do not have the MSx_P3 field. Do the 'params.p3 == 0'
check for MS0-M5 only. See [AN619, p. 6] for details.

Referenced document:
[AN619] Manually Generating an Si5351 Register Map, Rev. 0.4

Signed-off-by: Sergej Sawazki <ce3a@gmx.de>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
hifive-unleashed-5.1
Sergej Sawazki 2015-05-11 10:44:59 +02:00 committed by Michael Turquette
parent 2073b5e909
commit 45b03d3e88
1 changed files with 2 additions and 3 deletions
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5
drivers/clk/clk-si5351.c
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@ -607,9 +607,6 @@ static unsigned long si5351_msynth_recalc_rate(struct clk_hw *hw,
if (!hwdata->params.valid)
si5351_read_parameters(hwdata->drvdata, reg, &hwdata->params);
if (hwdata->params.p3 == 0)
return parent_rate;
/*
* multisync0-5: fOUT = (128 * P3 * fIN) / (P1*P3 + P2 + 512*P3)
* multisync6-7: fOUT = fIN / P1
@ -617,6 +614,8 @@ static unsigned long si5351_msynth_recalc_rate(struct clk_hw *hw,
rate = parent_rate;
if (hwdata->num > 5) {
m = hwdata->params.p1;
} else if (hwdata->params.p3 == 0) {
return parent_rate;
} else if ((si5351_reg_read(hwdata->drvdata, reg + 2) &
SI5351_OUTPUT_CLK_DIVBY4) == SI5351_OUTPUT_CLK_DIVBY4) {
m = 4;