When we configure the PLL record the input and output frequency, then if we get asked to configure the same values again just skip reprogramming the hardware. This makes things a bit easier to use for machine drivers since it means they don't need to keep track of if they've programmed the PLL so much.

Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/codecs/nau8822.c | 7 +++++++ sound/soc/codecs/nau8822.h | 2 ++ 2 files changed, 9 insertions(+)

diff --git a/sound/soc/codecs/nau8822.c b/sound/soc/codecs/nau8822.c index 08f6c56dc387..f4f68b549e1a 100644 --- a/sound/soc/codecs/nau8822.c +++ b/sound/soc/codecs/nau8822.c @@ -726,6 +726,10 @@ static int nau8822_set_pll(struct snd_soc_dai *dai, int pll_id, int source, struct nau8822_pll *pll_param = &nau8822->pll; int ret, fs;

+ if (freq_in == pll_param->freq_in && + freq_out == pll_param->freq_out) + return 0; + fs = freq_out / 256;

ret = nau8822_calc_pll(freq_in, fs, pll_param); @@ -762,6 +766,9 @@ static int nau8822_set_pll(struct snd_soc_dai *dai, int pll_id, int source, snd_soc_component_update_bits(component, NAU8822_REG_POWER_MANAGEMENT_1, NAU8822_PLL_EN_MASK, NAU8822_PLL_ON);

+ pll_param->freq_in = freq_in; + pll_param->freq_out = freq_out; + return 0; }

diff --git a/sound/soc/codecs/nau8822.h b/sound/soc/codecs/nau8822.h index b45d42c15de6..547ec057f853 100644 --- a/sound/soc/codecs/nau8822.h +++ b/sound/soc/codecs/nau8822.h @@ -198,6 +198,8 @@ struct nau8822_pll { int mclk_scaler; int pll_frac; int pll_int; + int freq_in; + int freq_out; };

/* Codec Private Data */