cppcheck reports a false positive:
sound/soc/codecs/da732x.c:1161:25: warning: Either the condition
'indiv<0' is redundant or there is division by zero at line
1161. [zerodivcond]
fref = (da732x->sysclk / indiv);
^
sound/soc/codecs/da732x.c:1158:12: note: Assuming that condition
'indiv<0' is not redundant
if (indiv < 0)
^
sound/soc/codecs/da732x.c:1161:25: note: Division by zero
fref = (da732x->sysclk / indiv);
^
The code is awfully convoluted/confusing and can be simplified with a
single variable and the BIT macro.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.boss...@linux.intel.com>
---
sound/soc/codecs/da732x.c | 17 ++++++-----------
sound/soc/codecs/da732x.h | 12 ++++--------
2 files changed, 10 insertions(+), 19 deletions(-)
diff --git a/sound/soc/codecs/da732x.c b/sound/soc/codecs/da732x.c
index d43ee7159ae0..42d6a3fc3af5 100644
--- a/sound/soc/codecs/da732x.c
+++ b/sound/soc/codecs/da732x.c
@@ -168,30 +168,25 @@ static const struct reg_default da732x_reg_cache[] = {
static inline int da732x_get_input_div(struct snd_soc_component *component,
int sysclk)
{
int val;
- int ret;
if (sysclk < DA732X_MCLK_10MHZ) {
- val = DA732X_MCLK_RET_0_10MHZ;
- ret = DA732X_MCLK_VAL_0_10MHZ;
+ val = DA732X_MCLK_VAL_0_10MHZ;
} else if ((sysclk >= DA732X_MCLK_10MHZ) &&
(sysclk < DA732X_MCLK_20MHZ)) {
- val = DA732X_MCLK_RET_10_20MHZ;
- ret = DA732X_MCLK_VAL_10_20MHZ;
+ val = DA732X_MCLK_VAL_10_20MHZ;
} else if ((sysclk >= DA732X_MCLK_20MHZ) &&
(sysclk < DA732X_MCLK_40MHZ)) {
- val = DA732X_MCLK_RET_20_40MHZ;
- ret = DA732X_MCLK_VAL_20_40MHZ;
+ val = DA732X_MCLK_VAL_20_40MHZ;
} else if ((sysclk >= DA732X_MCLK_40MHZ) &&
(sysclk <= DA732X_MCLK_54MHZ)) {
- val = DA732X_MCLK_RET_40_54MHZ;
- ret = DA732X_MCLK_VAL_40_54MHZ;
+ val = DA732X_MCLK_VAL_40_54MHZ;
} else {
return -EINVAL;
}
snd_soc_component_write(component, DA732X_REG_PLL_CTRL, val);
- return ret;
+ return val;
}
static void da732x_set_charge_pump(struct snd_soc_component *component, int
state)
@@ -1158,7 +1153,7 @@ static int da732x_set_dai_pll(struct snd_soc_component
*component, int pll_id,
if (indiv < 0)
return indiv;
- fref = (da732x->sysclk / indiv);
+ fref = da732x->sysclk / BIT(indiv);
div_hi = freq_out / fref;
frac_div = (u64)(freq_out % fref) * 8192ULL;
do_div(frac_div, fref);
diff --git a/sound/soc/codecs/da732x.h b/sound/soc/codecs/da732x.h
index c5af17ee1516..c2f784c3f359 100644
--- a/sound/soc/codecs/da732x.h
+++ b/sound/soc/codecs/da732x.h
@@ -48,14 +48,10 @@
#define DA732X_MCLK_20MHZ 20000000
#define DA732X_MCLK_40MHZ 40000000
#define DA732X_MCLK_54MHZ 54000000
-#define DA732X_MCLK_RET_0_10MHZ 0
-#define DA732X_MCLK_VAL_0_10MHZ 1
-#define DA732X_MCLK_RET_10_20MHZ 1
-#define DA732X_MCLK_VAL_10_20MHZ 2
-#define DA732X_MCLK_RET_20_40MHZ 2
-#define DA732X_MCLK_VAL_20_40MHZ 4
-#define DA732X_MCLK_RET_40_54MHZ 3
-#define DA732X_MCLK_VAL_40_54MHZ 8
+#define DA732X_MCLK_VAL_0_10MHZ 0
+#define DA732X_MCLK_VAL_10_20MHZ 1
+#define DA732X_MCLK_VAL_20_40MHZ 2
+#define DA732X_MCLK_VAL_40_54MHZ 3
#define DA732X_DAI_ID1 0
#define DA732X_DAI_ID2 1
#define DA732X_SRCCLK_PLL 0
--
2.25.1
