diff options
Diffstat (limited to 'drivers/iio/adc')
| -rw-r--r-- | drivers/iio/adc/meson_saradc.c | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c index 24025f179621..29fa7736d80c 100644 --- a/drivers/iio/adc/meson_saradc.c +++ b/drivers/iio/adc/meson_saradc.c @@ -96,8 +96,8 @@ #define MESON_SAR_ADC_FIFO_RD_SAMPLE_VALUE_MASK GENMASK(11, 0) #define MESON_SAR_ADC_AUX_SW 0x1c - #define MESON_SAR_ADC_AUX_SW_MUX_SEL_CHAN_MASK(_chan) \ - (GENMASK(10, 8) << (((_chan) - 2) * 2)) + #define MESON_SAR_ADC_AUX_SW_MUX_SEL_CHAN_SHIFT(_chan) \ + (8 + (((_chan) - 2) * 3)) #define MESON_SAR_ADC_AUX_SW_VREF_P_MUX BIT(6) #define MESON_SAR_ADC_AUX_SW_VREF_N_MUX BIT(5) #define MESON_SAR_ADC_AUX_SW_MODE_SEL BIT(4) @@ -622,7 +622,7 @@ static int meson_sar_adc_clk_init(struct iio_dev *indio_dev, static int meson_sar_adc_init(struct iio_dev *indio_dev) { struct meson_sar_adc_priv *priv = iio_priv(indio_dev); - int regval, ret; + int regval, i, ret; /* * make sure we start at CH7 input since the other muxes are only used @@ -677,6 +677,32 @@ static int meson_sar_adc_init(struct iio_dev *indio_dev) FIELD_PREP(MESON_SAR_ADC_DELAY_INPUT_DLY_SEL_MASK, 1)); + /* + * set up the input channel muxes in MESON_SAR_ADC_CHAN_10_SW + * (0 = SAR_ADC_CH0, 1 = SAR_ADC_CH1) + */ + regval = FIELD_PREP(MESON_SAR_ADC_CHAN_10_SW_CHAN0_MUX_SEL_MASK, 0); + regmap_update_bits(priv->regmap, MESON_SAR_ADC_CHAN_10_SW, + MESON_SAR_ADC_CHAN_10_SW_CHAN0_MUX_SEL_MASK, + regval); + regval = FIELD_PREP(MESON_SAR_ADC_CHAN_10_SW_CHAN1_MUX_SEL_MASK, 1); + regmap_update_bits(priv->regmap, MESON_SAR_ADC_CHAN_10_SW, + MESON_SAR_ADC_CHAN_10_SW_CHAN1_MUX_SEL_MASK, + regval); + + /* + * set up the input channel muxes in MESON_SAR_ADC_AUX_SW + * (2 = SAR_ADC_CH2, 3 = SAR_ADC_CH3, ...) and enable + * MESON_SAR_ADC_AUX_SW_YP_DRIVE_SW and + * MESON_SAR_ADC_AUX_SW_XP_DRIVE_SW like the vendor driver. + */ + regval = 0; + for (i = 2; i <= 7; i++) + regval |= i << MESON_SAR_ADC_AUX_SW_MUX_SEL_CHAN_SHIFT(i); + regval |= MESON_SAR_ADC_AUX_SW_YP_DRIVE_SW; + regval |= MESON_SAR_ADC_AUX_SW_XP_DRIVE_SW; + regmap_write(priv->regmap, MESON_SAR_ADC_AUX_SW, regval); + ret = clk_set_parent(priv->adc_sel_clk, priv->clkin); if (ret) { dev_err(indio_dev->dev.parent, |
