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| author | Guiting Shen <aarongt.shen@gmail.com> | 2023-08-13 20:55:20 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-08-14 13:10:37 +0100 |
| commit | 11e756cc85fac43e2025306ad6aea80114cc7e98 (patch) | |
| tree | 0de0b0fd6803b8f20adc4fee815a6d2e97e9b148 /sound | |
| parent | b39eee2754e9fbcbbdd866c1aad59575d8c4342e (diff) | |
| download | linux-stable-11e756cc85fac43e2025306ad6aea80114cc7e98.tar.gz linux-stable-11e756cc85fac43e2025306ad6aea80114cc7e98.tar.bz2 linux-stable-11e756cc85fac43e2025306ad6aea80114cc7e98.zip | |
ASoC: tlv320aic32x4: Fix the divide by zero
The value of register(NDAC,MDAC,NADC,MADC,BCLKN) maybe zero lead to
divide by zero in clk_aic32x4_div_recalc_rate().And the rate should be
divide by 128 if the value was zero in this function according to the
datasheet.
Add the macro AIC32X4_DIV_MAX to present the 128 and return 0 if failing
to read the value of register.
Signed-off-by: Guiting Shen <aarongt.shen@gmail.com>
Link: https://lore.kernel.org/r/20230813125520.11067-1-aarongt.shen@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/codecs/tlv320aic32x4-clk.c | 16 | ||||
| -rw-r--r-- | sound/soc/codecs/tlv320aic32x4.h | 5 |
2 files changed, 14 insertions, 7 deletions
diff --git a/sound/soc/codecs/tlv320aic32x4-clk.c b/sound/soc/codecs/tlv320aic32x4-clk.c index c116e82f712d..5c0a76a4a106 100644 --- a/sound/soc/codecs/tlv320aic32x4-clk.c +++ b/sound/soc/codecs/tlv320aic32x4-clk.c @@ -321,7 +321,7 @@ static int clk_aic32x4_div_set_rate(struct clk_hw *hw, unsigned long rate, u8 divisor; divisor = DIV_ROUND_UP(parent_rate, rate); - if (divisor > 128) + if (divisor > AIC32X4_DIV_MAX) return -EINVAL; return regmap_update_bits(div->regmap, div->reg, @@ -334,7 +334,7 @@ static int clk_aic32x4_div_determine_rate(struct clk_hw *hw, unsigned long divisor; divisor = DIV_ROUND_UP(req->best_parent_rate, req->rate); - if (divisor > 128) + if (divisor > AIC32X4_DIV_MAX) return -EINVAL; req->rate = DIV_ROUND_UP(req->best_parent_rate, divisor); @@ -345,12 +345,18 @@ static unsigned long clk_aic32x4_div_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { struct clk_aic32x4 *div = to_clk_aic32x4(hw); - unsigned int val; + int err; + + err = regmap_read(div->regmap, div->reg, &val); + if (err) + return 0; - regmap_read(div->regmap, div->reg, &val); + val &= AIC32X4_DIV_MASK; + if (!val) + val = AIC32X4_DIV_MAX; - return DIV_ROUND_UP(parent_rate, val & AIC32X4_DIV_MASK); + return DIV_ROUND_UP(parent_rate, val); } static const struct clk_ops aic32x4_div_ops = { diff --git a/sound/soc/codecs/tlv320aic32x4.h b/sound/soc/codecs/tlv320aic32x4.h index 4de5bd9e8cc5..d6101ce73f80 100644 --- a/sound/soc/codecs/tlv320aic32x4.h +++ b/sound/soc/codecs/tlv320aic32x4.h @@ -223,8 +223,9 @@ int aic32x4_register_clocks(struct device *dev, const char *mclk_name); #define AIC32X4_REFPOWERUP_120MS 0x07 /* Common mask and enable for all of the dividers */ -#define AIC32X4_DIVEN BIT(7) -#define AIC32X4_DIV_MASK GENMASK(6, 0) +#define AIC32X4_DIVEN BIT(7) +#define AIC32X4_DIV_MASK GENMASK(6, 0) +#define AIC32X4_DIV_MAX 128 /* Clock Limits */ #define AIC32X4_MAX_DOSR_FREQ 6200000 |