@@ -29,6 +29,8 @@
#define FSL_MICFIL_RATES SNDRV_PCM_RATE_8000_48000
#define FSL_MICFIL_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
+#define MICFIL_OSR_DEFAULT 16
+
struct fsl_micfil {
struct platform_device *pdev;
struct regmap *regmap;
@@ -41,6 +43,7 @@ struct fsl_micfil {
char name[32];
int irq[MICFIL_IRQ_LINES];
int quality; /*QUALITY 2-0 bits */
+ unsigned int osr;
};
struct fsl_micfil_soc_data {
@@ -112,11 +115,11 @@ static inline int get_pdm_clk(struct fsl_micfil *micfil,
unsigned int rate)
{
u32 ctrl2_reg;
- int qsel, osr;
+ int qsel;
int bclk;
+ int osr = MICFIL_OSR_DEFAULT;
regmap_read(micfil->regmap, REG_MICFIL_CTRL2, &ctrl2_reg);
- osr = 16 - FIELD_GET(MICFIL_CTRL2_CICOSR, ctrl2_reg);
qsel = FIELD_GET(MICFIL_CTRL2_QSEL, ctrl2_reg);
switch (qsel) {
@@ -282,7 +285,7 @@ static int fsl_set_clock_params(struct device *dev, unsigned int rate)
/* set CICOSR */
ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL2,
MICFIL_CTRL2_CICOSR,
- FIELD_PREP(MICFIL_CTRL2_CICOSR, MICFIL_CTRL2_CICOSR_DEFAULT));
+ FIELD_PREP(MICFIL_CTRL2_CICOSR, 16 - MICFIL_OSR_DEFAULT));
if (ret)
return ret;
@@ -673,7 +676,6 @@ static int fsl_micfil_probe(struct platform_device *pdev)
micfil->dma_params_rx.addr = res->start + REG_MICFIL_DATACH0;
micfil->dma_params_rx.maxburst = MICFIL_DMA_MAXBURST_RX;
-
platform_set_drvdata(pdev, micfil);
pm_runtime_enable(&pdev->dev);
@@ -58,7 +58,6 @@
#define MICFIL_QSEL_VLOW2_QUALITY 4
#define MICFIL_CTRL2_CICOSR GENMASK(19, 16)
-#define MICFIL_CTRL2_CICOSR_DEFAULT 0
#define MICFIL_CTRL2_CLKDIV GENMASK(7, 0)
/* MICFIL Status Register -- REG_MICFIL_STAT 0x08 */
The OSR (OverSampling Rate) setting is set once to the default value and never changed throughout the driver. Nevertheless the value is read back from the register for further calculations. Just use the default value because we know what we have written. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> --- sound/soc/fsl/fsl_micfil.c | 10 ++++++---- sound/soc/fsl/fsl_micfil.h | 1 - 2 files changed, 6 insertions(+), 5 deletions(-)