diff options
Diffstat (limited to 'drivers/staging/iio/adc')
-rw-r--r-- | drivers/staging/iio/adc/Kconfig | 2 | ||||
-rw-r--r-- | drivers/staging/iio/adc/ad7280a.c | 28 | ||||
-rw-r--r-- | drivers/staging/iio/adc/ad7291.c | 8 | ||||
-rw-r--r-- | drivers/staging/iio/adc/ad7606_core.c | 7 | ||||
-rw-r--r-- | drivers/staging/iio/adc/ad7816.c | 12 | ||||
-rw-r--r-- | drivers/staging/iio/adc/ad799x_core.c | 6 | ||||
-rw-r--r-- | drivers/staging/iio/adc/lpc32xx_adc.c | 12 | ||||
-rw-r--r-- | drivers/staging/iio/adc/mxs-lradc.c | 311 |
8 files changed, 328 insertions, 58 deletions
diff --git a/drivers/staging/iio/adc/Kconfig b/drivers/staging/iio/adc/Kconfig index e3d643001952..363329808a4f 100644 --- a/drivers/staging/iio/adc/Kconfig +++ b/drivers/staging/iio/adc/Kconfig @@ -103,6 +103,7 @@ config AD7280 config LPC32XX_ADC tristate "NXP LPC32XX ADC" depends on ARCH_LPC32XX || COMPILE_TEST + depends on HAS_IOMEM help Say yes here to build support for the integrated ADC inside the LPC32XX SoC. Note that this feature uses the same hardware as the @@ -128,6 +129,7 @@ config MXS_LRADC config SPEAR_ADC tristate "ST SPEAr ADC" depends on PLAT_SPEAR || COMPILE_TEST + depends on HAS_IOMEM help Say yes here to build support for the integrated ADC inside the ST SPEAr SoC. Provides direct access via sysfs. diff --git a/drivers/staging/iio/adc/ad7280a.c b/drivers/staging/iio/adc/ad7280a.c index 8209fa542a8a..1ac11f64827c 100644 --- a/drivers/staging/iio/adc/ad7280a.c +++ b/drivers/staging/iio/adc/ad7280a.c @@ -134,6 +134,8 @@ struct ad7280_state { unsigned char aux_threshhigh; unsigned char aux_threshlow; unsigned char cb_mask[AD7280A_MAX_CHAIN]; + + __be32 buf[2] ____cacheline_aligned; }; static void ad7280_crc8_build_table(unsigned char *crc_tab) @@ -189,22 +191,22 @@ static void ad7280_delay(struct ad7280_state *st) msleep(1); } -static int __ad7280_read32(struct spi_device *spi, unsigned *val) +static int __ad7280_read32(struct ad7280_state *st, unsigned *val) { - unsigned rx_buf, tx_buf = cpu_to_be32(AD7280A_READ_TXVAL); int ret; - struct spi_transfer t = { - .tx_buf = &tx_buf, - .rx_buf = &rx_buf, + .tx_buf = &st->buf[0], + .rx_buf = &st->buf[1], .len = 4, }; - ret = spi_sync_transfer(spi, &t, 1); + st->buf[0] = cpu_to_be32(AD7280A_READ_TXVAL); + + ret = spi_sync_transfer(st->spi, &t, 1); if (ret) return ret; - *val = be32_to_cpu(rx_buf); + *val = be32_to_cpu(st->buf[1]); return 0; } @@ -216,9 +218,9 @@ static int ad7280_write(struct ad7280_state *st, unsigned devaddr, (val & 0xFF) << 13 | all << 12); reg |= ad7280_calc_crc8(st->crc_tab, reg >> 11) << 3 | 0x2; - reg = cpu_to_be32(reg); + st->buf[0] = cpu_to_be32(reg); - return spi_write(st->spi, ®, 4); + return spi_write(st->spi, &st->buf[0], 4); } static int ad7280_read(struct ad7280_state *st, unsigned devaddr, @@ -248,7 +250,7 @@ static int ad7280_read(struct ad7280_state *st, unsigned devaddr, if (ret) return ret; - __ad7280_read32(st->spi, &tmp); + __ad7280_read32(st, &tmp); if (ad7280_check_crc(st, tmp)) return -EIO; @@ -286,7 +288,7 @@ static int ad7280_read_channel(struct ad7280_state *st, unsigned devaddr, ad7280_delay(st); - __ad7280_read32(st->spi, &tmp); + __ad7280_read32(st, &tmp); if (ad7280_check_crc(st, tmp)) return -EIO; @@ -319,7 +321,7 @@ static int ad7280_read_all_channels(struct ad7280_state *st, unsigned cnt, ad7280_delay(st); for (i = 0; i < cnt; i++) { - __ad7280_read32(st->spi, &tmp); + __ad7280_read32(st, &tmp); if (ad7280_check_crc(st, tmp)) return -EIO; @@ -362,7 +364,7 @@ static int ad7280_chain_setup(struct ad7280_state *st) return ret; for (n = 0; n <= AD7280A_MAX_CHAIN; n++) { - __ad7280_read32(st->spi, &val); + __ad7280_read32(st, &val); if (val == 0) return n - 1; diff --git a/drivers/staging/iio/adc/ad7291.c b/drivers/staging/iio/adc/ad7291.c index d13f8aeeb62f..357cef2a6f4c 100644 --- a/drivers/staging/iio/adc/ad7291.c +++ b/drivers/staging/iio/adc/ad7291.c @@ -452,10 +452,10 @@ static const struct iio_chan_spec ad7291_channels[] = { static const struct iio_info ad7291_info = { .read_raw = &ad7291_read_raw, - .read_event_config_new = &ad7291_read_event_config, - .write_event_config_new = &ad7291_write_event_config, - .read_event_value_new = &ad7291_read_event_value, - .write_event_value_new = &ad7291_write_event_value, + .read_event_config = &ad7291_read_event_config, + .write_event_config = &ad7291_write_event_config, + .read_event_value = &ad7291_read_event_value, + .write_event_value = &ad7291_write_event_value, .driver_module = THIS_MODULE, }; diff --git a/drivers/staging/iio/adc/ad7606_core.c b/drivers/staging/iio/adc/ad7606_core.c index 2083673a79ca..f0f05f195d2c 100644 --- a/drivers/staging/iio/adc/ad7606_core.c +++ b/drivers/staging/iio/adc/ad7606_core.c @@ -239,7 +239,12 @@ static const struct attribute_group ad7606_attribute_group_range = { .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),\ .scan_index = num, \ - .scan_type = IIO_ST('s', 16, 16, 0), \ + .scan_type = { \ + .sign = 's', \ + .realbits = 16, \ + .storagebits = 16, \ + .endianness = IIO_CPU, \ + }, \ } static const struct iio_chan_spec ad7606_8_channels[] = { diff --git a/drivers/staging/iio/adc/ad7816.c b/drivers/staging/iio/adc/ad7816.c index 9f48e5c74eed..2369cf28412e 100644 --- a/drivers/staging/iio/adc/ad7816.c +++ b/drivers/staging/iio/adc/ad7816.c @@ -412,7 +412,7 @@ static int ad7816_probe(struct spi_device *spi_dev) return ret; } - ret = iio_device_register(indio_dev); + ret = devm_iio_device_register(&spi_dev->dev, indio_dev); if (ret) return ret; @@ -422,15 +422,6 @@ static int ad7816_probe(struct spi_device *spi_dev) return 0; } -static int ad7816_remove(struct spi_device *spi_dev) -{ - struct iio_dev *indio_dev = dev_get_drvdata(&spi_dev->dev); - - iio_device_unregister(indio_dev); - - return 0; -} - static const struct spi_device_id ad7816_id[] = { { "ad7816", 0 }, { "ad7817", 0 }, @@ -446,7 +437,6 @@ static struct spi_driver ad7816_driver = { .owner = THIS_MODULE, }, .probe = ad7816_probe, - .remove = ad7816_remove, .id_table = ad7816_id, }; module_spi_driver(ad7816_driver); diff --git a/drivers/staging/iio/adc/ad799x_core.c b/drivers/staging/iio/adc/ad799x_core.c index 9428be82b655..5ea36410f716 100644 --- a/drivers/staging/iio/adc/ad799x_core.c +++ b/drivers/staging/iio/adc/ad799x_core.c @@ -377,9 +377,9 @@ static const struct iio_info ad7991_info = { static const struct iio_info ad7993_4_7_8_info = { .read_raw = &ad799x_read_raw, .event_attrs = &ad799x_event_attrs_group, - .read_event_config_new = &ad799x_read_event_config, - .read_event_value_new = &ad799x_read_event_value, - .write_event_value_new = &ad799x_write_event_value, + .read_event_config = &ad799x_read_event_config, + .read_event_value = &ad799x_read_event_value, + .write_event_value = &ad799x_write_event_value, .driver_module = THIS_MODULE, .update_scan_mode = ad7997_8_update_scan_mode, }; diff --git a/drivers/staging/iio/adc/lpc32xx_adc.c b/drivers/staging/iio/adc/lpc32xx_adc.c index ef0a21d8ce15..a876ce755351 100644 --- a/drivers/staging/iio/adc/lpc32xx_adc.c +++ b/drivers/staging/iio/adc/lpc32xx_adc.c @@ -183,7 +183,7 @@ static int lpc32xx_adc_probe(struct platform_device *pdev) iodev->channels = lpc32xx_adc_iio_channels; iodev->num_channels = ARRAY_SIZE(lpc32xx_adc_iio_channels); - retval = iio_device_register(iodev); + retval = devm_iio_device_register(&pdev->dev, iodev); if (retval) return retval; @@ -192,15 +192,6 @@ static int lpc32xx_adc_probe(struct platform_device *pdev) return 0; } -static int lpc32xx_adc_remove(struct platform_device *pdev) -{ - struct iio_dev *iodev = platform_get_drvdata(pdev); - - iio_device_unregister(iodev); - - return 0; -} - #ifdef CONFIG_OF static const struct of_device_id lpc32xx_adc_match[] = { { .compatible = "nxp,lpc3220-adc" }, @@ -211,7 +202,6 @@ MODULE_DEVICE_TABLE(of, lpc32xx_adc_match); static struct platform_driver lpc32xx_adc_driver = { .probe = lpc32xx_adc_probe, - .remove = lpc32xx_adc_remove, .driver = { .name = MOD_NAME, .owner = THIS_MODULE, diff --git a/drivers/staging/iio/adc/mxs-lradc.c b/drivers/staging/iio/adc/mxs-lradc.c index e2dd7830b320..df71669bb60e 100644 --- a/drivers/staging/iio/adc/mxs-lradc.c +++ b/drivers/staging/iio/adc/mxs-lradc.c @@ -38,6 +38,7 @@ #include <linux/clk.h> #include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> #include <linux/iio/buffer.h> #include <linux/iio/trigger.h> #include <linux/iio/trigger_consumer.h> @@ -111,16 +112,59 @@ static const char * const mx28_lradc_irq_names[] = { struct mxs_lradc_of_config { const int irq_count; const char * const *irq_name; + const uint32_t *vref_mv; +}; + +#define VREF_MV_BASE 1850 + +static const uint32_t mx23_vref_mv[LRADC_MAX_TOTAL_CHANS] = { + VREF_MV_BASE, /* CH0 */ + VREF_MV_BASE, /* CH1 */ + VREF_MV_BASE, /* CH2 */ + VREF_MV_BASE, /* CH3 */ + VREF_MV_BASE, /* CH4 */ + VREF_MV_BASE, /* CH5 */ + VREF_MV_BASE * 2, /* CH6 VDDIO */ + VREF_MV_BASE * 4, /* CH7 VBATT */ + VREF_MV_BASE, /* CH8 Temp sense 0 */ + VREF_MV_BASE, /* CH9 Temp sense 1 */ + VREF_MV_BASE, /* CH10 */ + VREF_MV_BASE, /* CH11 */ + VREF_MV_BASE, /* CH12 USB_DP */ + VREF_MV_BASE, /* CH13 USB_DN */ + VREF_MV_BASE, /* CH14 VBG */ + VREF_MV_BASE * 4, /* CH15 VDD5V */ +}; + +static const uint32_t mx28_vref_mv[LRADC_MAX_TOTAL_CHANS] = { + VREF_MV_BASE, /* CH0 */ + VREF_MV_BASE, /* CH1 */ + VREF_MV_BASE, /* CH2 */ + VREF_MV_BASE, /* CH3 */ + VREF_MV_BASE, /* CH4 */ + VREF_MV_BASE, /* CH5 */ + VREF_MV_BASE, /* CH6 */ + VREF_MV_BASE * 4, /* CH7 VBATT */ + VREF_MV_BASE, /* CH8 Temp sense 0 */ + VREF_MV_BASE, /* CH9 Temp sense 1 */ + VREF_MV_BASE * 2, /* CH10 VDDIO */ + VREF_MV_BASE, /* CH11 VTH */ + VREF_MV_BASE * 2, /* CH12 VDDA */ + VREF_MV_BASE, /* CH13 VDDD */ + VREF_MV_BASE, /* CH14 VBG */ + VREF_MV_BASE * 4, /* CH15 VDD5V */ }; static const struct mxs_lradc_of_config mxs_lradc_of_config[] = { [IMX23_LRADC] = { .irq_count = ARRAY_SIZE(mx23_lradc_irq_names), .irq_name = mx23_lradc_irq_names, + .vref_mv = mx23_vref_mv, }, [IMX28_LRADC] = { .irq_count = ARRAY_SIZE(mx28_lradc_irq_names), .irq_name = mx28_lradc_irq_names, + .vref_mv = mx28_vref_mv, }, }; @@ -141,6 +185,16 @@ enum lradc_ts_plate { LRADC_SAMPLE_VALID, }; +enum mxs_lradc_divbytwo { + MXS_LRADC_DIV_DISABLED = 0, + MXS_LRADC_DIV_ENABLED, +}; + +struct mxs_lradc_scale { + unsigned int integer; + unsigned int nano; +}; + struct mxs_lradc { struct device *dev; void __iomem *base; @@ -155,6 +209,10 @@ struct mxs_lradc { struct completion completion; + const uint32_t *vref_mv; + struct mxs_lradc_scale scale_avail[LRADC_MAX_TOTAL_CHANS][2]; + unsigned long is_divided; + /* * Touchscreen LRADC channels receives a private slot in the CTRL4 * register, the slot #7. Therefore only 7 slots instead of 8 in the @@ -243,6 +301,7 @@ struct mxs_lradc { #define LRADC_CTRL1_LRADC_IRQ_OFFSET 0 #define LRADC_CTRL2 0x20 +#define LRADC_CTRL2_DIVIDE_BY_TWO_OFFSET 24 #define LRADC_CTRL2_TEMPSENSE_PWD (1 << 15) #define LRADC_STATUS 0x40 @@ -759,20 +818,11 @@ static void mxs_lradc_handle_touch(struct mxs_lradc *lradc) /* * Raw I/O operations */ -static int mxs_lradc_read_raw(struct iio_dev *iio_dev, - const struct iio_chan_spec *chan, - int *val, int *val2, long m) +static int mxs_lradc_read_single(struct iio_dev *iio_dev, int chan, int *val) { struct mxs_lradc *lradc = iio_priv(iio_dev); int ret; - if (m != IIO_CHAN_INFO_RAW) - return -EINVAL; - - /* Check for invalid channel */ - if (chan->channel > LRADC_MAX_TOTAL_CHANS) - return -EINVAL; - /* * See if there is no buffered operation in progess. If there is, simply * bail out. This can be improved to support both buffered and raw IO at @@ -797,7 +847,7 @@ static int mxs_lradc_read_raw(struct iio_dev *iio_dev, /* Clean the slot's previous content, then set new one. */ mxs_lradc_reg_clear(lradc, LRADC_CTRL4_LRADCSELECT_MASK(0), LRADC_CTRL4); - mxs_lradc_reg_set(lradc, chan->channel, LRADC_CTRL4); + mxs_lradc_reg_set(lradc, chan, LRADC_CTRL4); mxs_lradc_reg_wrt(lradc, 0, LRADC_CH(0)); @@ -824,9 +874,206 @@ err: return ret; } +static int mxs_lradc_read_temp(struct iio_dev *iio_dev, int *val) +{ + int ret, min, max; + + ret = mxs_lradc_read_single(iio_dev, 8, &min); + if (ret != IIO_VAL_INT) + return ret; + + ret = mxs_lradc_read_single(iio_dev, 9, &max); + if (ret != IIO_VAL_INT) + return ret; + + *val = max - min; + + return IIO_VAL_INT; +} + +static int mxs_lradc_read_raw(struct iio_dev *iio_dev, + const struct iio_chan_spec *chan, + int *val, int *val2, long m) +{ + struct mxs_lradc *lradc = iio_priv(iio_dev); + + /* Check for invalid channel */ + if (chan->channel > LRADC_MAX_TOTAL_CHANS) + return -EINVAL; + + switch (m) { + case IIO_CHAN_INFO_RAW: + if (chan->type == IIO_TEMP) + return mxs_lradc_read_temp(iio_dev, val); + + return mxs_lradc_read_single(iio_dev, chan->channel, val); + + case IIO_CHAN_INFO_SCALE: + if (chan->type == IIO_TEMP) { + /* From the datasheet, we have to multiply by 1.012 and + * divide by 4 + */ + *val = 0; + *val2 = 253000; + return IIO_VAL_INT_PLUS_MICRO; + } + + *val = lradc->vref_mv[chan->channel]; + *val2 = chan->scan_type.realbits - + test_bit(chan->channel, &lradc->is_divided); + return IIO_VAL_FRACTIONAL_LOG2; + + case IIO_CHAN_INFO_OFFSET: + if (chan->type == IIO_TEMP) { + /* The calculated value from the ADC is in Kelvin, we + * want Celsius for hwmon so the offset is + * -272.15 * scale + */ + *val = -1075; + *val2 = 691699; + + return IIO_VAL_INT_PLUS_MICRO; + } + + return -EINVAL; + + default: + break; + } + + return -EINVAL; +} + +static int mxs_lradc_write_raw(struct iio_dev *iio_dev, + const struct iio_chan_spec *chan, + int val, int val2, long m) +{ + struct mxs_lradc *lradc = iio_priv(iio_dev); + struct mxs_lradc_scale *scale_avail = + lradc->scale_avail[chan->channel]; + int ret; + + ret = mutex_trylock(&lradc->lock); + if (!ret) + return -EBUSY; + + switch (m) { + case IIO_CHAN_INFO_SCALE: + ret = -EINVAL; + if (val == scale_avail[MXS_LRADC_DIV_DISABLED].integer && + val2 == scale_avail[MXS_LRADC_DIV_DISABLED].nano) { + /* divider by two disabled */ + writel(1 << LRADC_CTRL2_DIVIDE_BY_TWO_OFFSET, + lradc->base + LRADC_CTRL2 + STMP_OFFSET_REG_CLR); + clear_bit(chan->channel, &lradc->is_divided); + ret = 0; + } else if (val == scale_avail[MXS_LRADC_DIV_ENABLED].integer && + val2 == scale_avail[MXS_LRADC_DIV_ENABLED].nano) { + /* divider by two enabled */ + writel(1 << LRADC_CTRL2_DIVIDE_BY_TWO_OFFSET, + lradc->base + LRADC_CTRL2 + STMP_OFFSET_REG_SET); + set_bit(chan->channel, &lradc->is_divided); + ret = 0; + } + + break; + default: + ret = -EINVAL; + break; + } + + mutex_unlock(&lradc->lock); + + return ret; +} + +static int mxs_lradc_write_raw_get_fmt(struct iio_dev *iio_dev, + const struct iio_chan_spec *chan, + long m) +{ + return IIO_VAL_INT_PLUS_NANO; +} + +static ssize_t mxs_lradc_show_scale_available_ch(struct device *dev, + struct device_attribute *attr, + char *buf, + int ch) +{ + struct iio_dev *iio = dev_to_iio_dev(dev); + struct mxs_lradc *lradc = iio_priv(iio); + int i, len = 0; + + for (i = 0; i < ARRAY_SIZE(lradc->scale_avail[ch]); i++) + len += sprintf(buf + len, "%d.%09u ", + lradc->scale_avail[ch][i].integer, + lradc->scale_avail[ch][i].nano); + + len += sprintf(buf + len, "\n"); + + return len; +} + +static ssize_t mxs_lradc_show_scale_available(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev_attr *iio_attr = to_iio_dev_attr(attr); + + return mxs_lradc_show_scale_available_ch(dev, attr, buf, + iio_attr->address); +} + +#define SHOW_SCALE_AVAILABLE_ATTR(ch) \ +static IIO_DEVICE_ATTR(in_voltage##ch##_scale_available, S_IRUGO, \ + mxs_lradc_show_scale_available, NULL, ch) + +SHOW_SCALE_AVAILABLE_ATTR(0); +SHOW_SCALE_AVAILABLE_ATTR(1); +SHOW_SCALE_AVAILABLE_ATTR(2); +SHOW_SCALE_AVAILABLE_ATTR(3); +SHOW_SCALE_AVAILABLE_ATTR(4); +SHOW_SCALE_AVAILABLE_ATTR(5); +SHOW_SCALE_AVAILABLE_ATTR(6); +SHOW_SCALE_AVAILABLE_ATTR(7); +SHOW_SCALE_AVAILABLE_ATTR(8); +SHOW_SCALE_AVAILABLE_ATTR(9); +SHOW_SCALE_AVAILABLE_ATTR(10); +SHOW_SCALE_AVAILABLE_ATTR(11); +SHOW_SCALE_AVAILABLE_ATTR(12); +SHOW_SCALE_AVAILABLE_ATTR(13); +SHOW_SCALE_AVAILABLE_ATTR(14); +SHOW_SCALE_AVAILABLE_ATTR(15); + +static struct attribute *mxs_lradc_attributes[] = { + &iio_dev_attr_in_voltage0_scale_available.dev_attr.attr, + &iio_dev_attr_in_voltage1_scale_available.dev_attr.attr, + &iio_dev_attr_in_voltage2_scale_available.dev_attr.attr, + &iio_dev_attr_in_voltage3_scale_available.dev_attr.attr, + &iio_dev_attr_in_voltage4_scale_available.dev_attr.attr, + &iio_dev_attr_in_voltage5_scale_available.dev_attr.attr, + &iio_dev_attr_in_voltage6_scale_available.dev_attr.attr, + &iio_dev_attr_in_voltage7_scale_available.dev_attr.attr, + &iio_dev_attr_in_voltage8_scale_available.dev_attr.attr, + &iio_dev_attr_in_voltage9_scale_available.dev_attr.attr, + &iio_dev_attr_in_voltage10_scale_available.dev_attr.attr, + &iio_dev_attr_in_voltage11_scale_available.dev_attr.attr, + &iio_dev_attr_in_voltage12_scale_available.dev_attr.attr, + &iio_dev_attr_in_voltage13_scale_available.dev_attr.attr, + &iio_dev_attr_in_voltage14_scale_available.dev_attr.attr, + &iio_dev_attr_in_voltage15_scale_available.dev_attr.attr, + NULL +}; + +static const struct attribute_group mxs_lradc_attribute_group = { + .attrs = mxs_lradc_attributes, +}; + static const struct iio_info mxs_lradc_iio_info = { .driver_module = THIS_MODULE, .read_raw = mxs_lradc_read_raw, + .write_raw = mxs_lradc_write_raw, + .write_raw_get_fmt = mxs_lradc_write_raw_get_fmt, + .attrs = &mxs_lradc_attribute_group, }; static int mxs_lradc_ts_open(struct input_dev *dev) @@ -1133,8 +1380,10 @@ static const struct iio_buffer_setup_ops mxs_lradc_buffer_ops = { .type = (chan_type), \ .indexed = 1, \ .scan_index = (idx), \ - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ + BIT(IIO_CHAN_INFO_SCALE), \ .channel = (idx), \ + .address = (idx), \ .scan_type = { \ .sign = 'u', \ .realbits = LRADC_RESOLUTION, \ @@ -1151,8 +1400,17 @@ static const struct iio_chan_spec mxs_lradc_chan_spec[] = { MXS_ADC_CHAN(5, IIO_VOLTAGE), MXS_ADC_CHAN(6, IIO_VOLTAGE), MXS_ADC_CHAN(7, IIO_VOLTAGE), /* VBATT */ - MXS_ADC_CHAN(8, IIO_TEMP), /* Temp sense 0 */ - MXS_ADC_CHAN(9, IIO_TEMP), /* Temp sense 1 */ + /* Combined Temperature sensors */ + { + .type = IIO_TEMP, + .indexed = 1, + .scan_index = 8, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_OFFSET) | + BIT(IIO_CHAN_INFO_SCALE), + .channel = 8, + .scan_type = {.sign = 'u', .realbits = 18, .storagebits = 32,}, + }, MXS_ADC_CHAN(10, IIO_VOLTAGE), /* VDDIO */ MXS_ADC_CHAN(11, IIO_VOLTAGE), /* VTH */ MXS_ADC_CHAN(12, IIO_VOLTAGE), /* VDDA */ @@ -1271,7 +1529,8 @@ static int mxs_lradc_probe(struct platform_device *pdev) struct iio_dev *iio; struct resource *iores; int ret = 0, touch_ret; - int i; + int i, s; + unsigned int scale_uv; /* Allocate the IIO device. */ iio = devm_iio_device_alloc(dev, sizeof(*lradc)); @@ -1316,6 +1575,8 @@ static int mxs_lradc_probe(struct platform_device *pdev) return ret; } + lradc->vref_mv = of_cfg->vref_mv; + platform_set_drvdata(pdev, iio); init_completion(&lradc->completion); @@ -1339,6 +1600,26 @@ static int mxs_lradc_probe(struct platform_device *pdev) if (ret) goto err_trig; + /* Populate available ADC input ranges */ + for (i = 0; i < LRADC_MAX_TOTAL_CHANS; i++) { + for (s = 0; s < ARRAY_SIZE(lradc->scale_avail[i]); s++) { + /* + * [s=0] = optional divider by two disabled (default) + * [s=1] = optional divider by two enabled + * + * The scale is calculated by doing: + * Vref >> (realbits - s) + * which multiplies by two on the second component + * of the array. + */ + scale_uv = ((u64)lradc->vref_mv[i] * 100000000) >> + (iio->channels[i].scan_type.realbits - s); + lradc->scale_avail[i][s].nano = + do_div(scale_uv, 100000000) * 10; + lradc->scale_avail[i][s].integer = scale_uv; + } + } + /* Configure the hardware. */ ret = mxs_lradc_hw_init(lradc); if (ret) |