From 3ae190edc5f6f64f296f8dd15f4b511f529ab402 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Fri, 3 Jun 2022 12:35:30 +0200 Subject: [PATCH] ASoC: nau8822: Don't reconfigure PLL to the same values 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 Link: https://lore.kernel.org/r/20220603103530.3844527-1-broonie@kernel.org Signed-off-by: Mark Brown --- 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 08f6c56dc387f..f4f68b549e1ae 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 b45d42c15de6b..547ec057f853b 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 */ -- 2.30.2