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Add calibrated sample data support 2. Use of_match_table to decide each platform's feature set Signed-off-by: Chun-Hung Wu --- drivers/iio/adc/mt6577_auxadc.c | 54 +++++++++++++++++++++++++++++++---------- 1 file changed, 41 insertions(+), 13 deletions(-) diff --git a/drivers/iio/adc/mt6577_auxadc.c b/drivers/iio/adc/mt6577_auxadc.c index 95d76ab..e1bdcc0 100644 --- a/drivers/iio/adc/mt6577_auxadc.c +++ b/drivers/iio/adc/mt6577_auxadc.c @@ -42,10 +42,26 @@ #define MT6577_AUXADC_POWER_READY_MS 1 #define MT6577_AUXADC_SAMPLE_READY_US 25 +struct mtk_auxadc_compatible { + bool sample_data_cali; + bool check_global_idle; +}; + struct mt6577_auxadc_device { void __iomem *reg_base; struct clk *adc_clk; struct mutex lock; + const struct mtk_auxadc_compatible *dev_comp; +}; + +static const struct mtk_auxadc_compatible mt8173_compat = { + .sample_data_cali = false, + .check_global_idle = true, +}; + +static const struct mtk_auxadc_compatible mt6765_compat = { + .sample_data_cali = true, + .check_global_idle = false, }; #define MT6577_AUXADC_CHANNEL(idx) { \ @@ -74,6 +90,11 @@ struct mt6577_auxadc_device { MT6577_AUXADC_CHANNEL(15), }; +static int mt_auxadc_get_cali_data(int rawdata, bool enable_cali) +{ + return rawdata; +} + static inline void mt6577_auxadc_mod_reg(void __iomem *reg, u32 or_mask, u32 and_mask) { @@ -120,15 +141,17 @@ static int mt6577_auxadc_read(struct iio_dev *indio_dev, /* we must delay here for hardware sample channel data */ udelay(MT6577_AUXADC_SAMPLE_READY_US); - /* check MTK_AUXADC_CON2 if auxadc is idle */ - ret = readl_poll_timeout(adc_dev->reg_base + MT6577_AUXADC_CON2, val, - ((val & MT6577_AUXADC_STA) == 0), - MT6577_AUXADC_SLEEP_US, - MT6577_AUXADC_TIMEOUT_US); - if (ret < 0) { - dev_err(indio_dev->dev.parent, - "wait for auxadc idle time out\n"); - goto err_timeout; + if (adc_dev->dev_comp->check_global_idle) { + /* check MTK_AUXADC_CON2 if auxadc is idle */ + ret = readl_poll_timeout(adc_dev->reg_base + MT6577_AUXADC_CON2, + val, ((val & MT6577_AUXADC_STA) == 0), + MT6577_AUXADC_SLEEP_US, + MT6577_AUXADC_TIMEOUT_US); + if (ret < 0) { + dev_err(indio_dev->dev.parent, + "wait for auxadc idle time out\n"); + goto err_timeout; + } } /* read channel and make sure ready bit == 1 */ @@ -163,6 +186,8 @@ static int mt6577_auxadc_read_raw(struct iio_dev *indio_dev, int *val2, long info) { + struct mt6577_auxadc_device *adc_dev = iio_priv(indio_dev); + switch (info) { case IIO_CHAN_INFO_PROCESSED: *val = mt6577_auxadc_read(indio_dev, chan); @@ -172,6 +197,8 @@ static int mt6577_auxadc_read_raw(struct iio_dev *indio_dev, chan->channel); return *val; } + if (adc_dev->dev_comp->sample_data_cali) + *val = mt_auxadc_get_cali_data(*val, true); return IIO_VAL_INT; default: @@ -304,10 +331,11 @@ static SIMPLE_DEV_PM_OPS(mt6577_auxadc_pm_ops, mt6577_auxadc_resume); static const struct of_device_id mt6577_auxadc_of_match[] = { - { .compatible = "mediatek,mt2701-auxadc", }, - { .compatible = "mediatek,mt2712-auxadc", }, - { .compatible = "mediatek,mt7622-auxadc", }, - { .compatible = "mediatek,mt8173-auxadc", }, + { .compatible = "mediatek,mt2701-auxadc", .data = &mt8173_compat}, + { .compatible = "mediatek,mt2712-auxadc", .data = &mt8173_compat}, + { .compatible = "mediatek,mt7622-auxadc", .data = &mt8173_compat}, + { .compatible = "mediatek,mt8173-auxadc", .data = &mt8173_compat}, + { .compatible = "mediatek,mt6765-auxadc", .data = &mt6765_compat}, { } }; MODULE_DEVICE_TABLE(of, mt6577_auxadc_of_match); -- 1.9.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel