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clk: meson: check pll rate param table before using it

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Make sure the rate param table is available before using it.
Some read-only plls don't provide it, which is ok since the
table is not used by read-only clocks. R/W clocks are supposed
to provide it, but it does not hurt check it.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
This commit is contained in:
Jerome Brunet 2018-01-19 16:55:21 +01:00
parent 7928b2cbe5
commit 840e1a73cc
1 changed files with 10 additions and 0 deletions
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10
drivers/clk/meson/clk-pll.c
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@ -94,6 +94,13 @@ static long meson_clk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
const struct pll_rate_table *rate_table = pll->rate_table;
int i;
/*
* if the table is missing, just return the current rate
* since we don't have the other available frequencies
*/
if (!rate_table)
return meson_clk_pll_recalc_rate(hw, *parent_rate);
for (i = 0; i < pll->rate_count; i++) {
if (rate <= rate_table[i].rate)
return rate_table[i].rate;
@ -109,6 +116,9 @@ static const struct pll_rate_table *meson_clk_get_pll_settings(struct meson_clk_
const struct pll_rate_table *rate_table = pll->rate_table;
int i;
if (!rate_table)
return NULL;
for (i = 0; i < pll->rate_count; i++) {
if (rate == rate_table[i].rate)
return &rate_table[i];