aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/iio/adc
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/iio/adc')
-rw-r--r--drivers/iio/adc/ad_sigma_delta.c8
-rw-r--r--drivers/iio/adc/at91-sama5d2_adc.c2
-rw-r--r--drivers/iio/adc/berlin2-adc.c4
-rw-r--r--drivers/iio/adc/exynos_adc.c24
-rw-r--r--drivers/iio/adc/meson_saradc.c2
-rw-r--r--drivers/iio/adc/mxs-lradc-adc.c10
-rw-r--r--drivers/iio/adc/palmas_gpadc.c2
-rw-r--r--drivers/iio/adc/stm32-dfsdm-adc.c1
-rw-r--r--drivers/iio/adc/stx104.c96
-rw-r--r--drivers/iio/adc/twl6030-gpadc.c32
10 files changed, 130 insertions, 51 deletions
diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c
index 25af4c76b57f..a96943bbd83d 100644
--- a/drivers/iio/adc/ad_sigma_delta.c
+++ b/drivers/iio/adc/ad_sigma_delta.c
@@ -283,10 +283,10 @@ int ad_sigma_delta_single_conversion(struct iio_dev *indio_dev,
unsigned int sample, raw_sample;
int ret = 0;
- if (iio_buffer_enabled(indio_dev))
- return -EBUSY;
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
- mutex_lock(&indio_dev->mlock);
ad_sigma_delta_set_channel(sigma_delta, chan->address);
spi_bus_lock(sigma_delta->spi->master);
@@ -320,7 +320,7 @@ out:
ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_IDLE);
sigma_delta->bus_locked = false;
spi_bus_unlock(sigma_delta->spi->master);
- mutex_unlock(&indio_dev->mlock);
+ iio_device_release_direct_mode(indio_dev);
if (ret)
return ret;
diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c
index b355899f54cc..41afb9b8696d 100644
--- a/drivers/iio/adc/at91-sama5d2_adc.c
+++ b/drivers/iio/adc/at91-sama5d2_adc.c
@@ -989,7 +989,7 @@ static struct iio_trigger *at91_adc_allocate_trigger(struct iio_dev *indio,
trig = devm_iio_trigger_alloc(&indio->dev, "%s-dev%d-%s", indio->name,
indio->id, trigger_name);
if (!trig)
- return NULL;
+ return ERR_PTR(-ENOMEM);
trig->dev.parent = indio->dev.parent;
iio_trigger_set_drvdata(trig, indio);
diff --git a/drivers/iio/adc/berlin2-adc.c b/drivers/iio/adc/berlin2-adc.c
index 72d8fa94ab31..86fdfea32979 100644
--- a/drivers/iio/adc/berlin2-adc.c
+++ b/drivers/iio/adc/berlin2-adc.c
@@ -289,8 +289,10 @@ static int berlin2_adc_probe(struct platform_device *pdev)
int ret;
indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*priv));
- if (!indio_dev)
+ if (!indio_dev) {
+ of_node_put(parent_np);
return -ENOMEM;
+ }
priv = iio_priv(indio_dev);
platform_set_drvdata(pdev, indio_dev);
diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c
index 1ca2c4d39f87..7c5ea4ed5332 100644
--- a/drivers/iio/adc/exynos_adc.c
+++ b/drivers/iio/adc/exynos_adc.c
@@ -817,6 +817,12 @@ static int exynos_adc_probe(struct platform_device *pdev)
}
}
+ /* leave out any TS related code if unreachable */
+ if (IS_REACHABLE(CONFIG_INPUT)) {
+ has_ts = of_property_read_bool(pdev->dev.of_node,
+ "has-touchscreen") || pdata;
+ }
+
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "no irq resource?\n");
@@ -824,11 +830,15 @@ static int exynos_adc_probe(struct platform_device *pdev)
}
info->irq = irq;
- irq = platform_get_irq(pdev, 1);
- if (irq == -EPROBE_DEFER)
- return irq;
+ if (has_ts) {
+ irq = platform_get_irq(pdev, 1);
+ if (irq == -EPROBE_DEFER)
+ return irq;
- info->tsirq = irq;
+ info->tsirq = irq;
+ } else {
+ info->tsirq = -1;
+ }
info->dev = &pdev->dev;
@@ -895,12 +905,6 @@ static int exynos_adc_probe(struct platform_device *pdev)
if (info->data->init_hw)
info->data->init_hw(info);
- /* leave out any TS related code if unreachable */
- if (IS_REACHABLE(CONFIG_INPUT)) {
- has_ts = of_property_read_bool(pdev->dev.of_node,
- "has-touchscreen") || pdata;
- }
-
if (pdata)
info->delay = pdata->delay;
else
diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index 6e0ef9bb2497..c44876935750 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -75,7 +75,7 @@
#define MESON_SAR_ADC_REG3_PANEL_DETECT_COUNT_MASK GENMASK(20, 18)
#define MESON_SAR_ADC_REG3_PANEL_DETECT_FILTER_TB_MASK GENMASK(17, 16)
#define MESON_SAR_ADC_REG3_ADC_CLK_DIV_SHIFT 10
- #define MESON_SAR_ADC_REG3_ADC_CLK_DIV_WIDTH 5
+ #define MESON_SAR_ADC_REG3_ADC_CLK_DIV_WIDTH 6
#define MESON_SAR_ADC_REG3_BLOCK_DLY_SEL_MASK GENMASK(9, 8)
#define MESON_SAR_ADC_REG3_BLOCK_DLY_MASK GENMASK(7, 0)
diff --git a/drivers/iio/adc/mxs-lradc-adc.c b/drivers/iio/adc/mxs-lradc-adc.c
index fc8b70d8d64c..10df0b26913a 100644
--- a/drivers/iio/adc/mxs-lradc-adc.c
+++ b/drivers/iio/adc/mxs-lradc-adc.c
@@ -767,13 +767,13 @@ static int mxs_lradc_adc_probe(struct platform_device *pdev)
ret = mxs_lradc_adc_trigger_init(iio);
if (ret)
- goto err_trig;
+ return ret;
ret = iio_triggered_buffer_setup(iio, &iio_pollfunc_store_time,
&mxs_lradc_adc_trigger_handler,
&mxs_lradc_adc_buffer_ops);
if (ret)
- return ret;
+ goto err_trig;
adc->vref_mv = mxs_lradc_adc_vref_mv[lradc->soc];
@@ -811,9 +811,9 @@ static int mxs_lradc_adc_probe(struct platform_device *pdev)
err_dev:
mxs_lradc_adc_hw_stop(adc);
- mxs_lradc_adc_trigger_remove(iio);
-err_trig:
iio_triggered_buffer_cleanup(iio);
+err_trig:
+ mxs_lradc_adc_trigger_remove(iio);
return ret;
}
@@ -824,8 +824,8 @@ static int mxs_lradc_adc_remove(struct platform_device *pdev)
iio_device_unregister(iio);
mxs_lradc_adc_hw_stop(adc);
- mxs_lradc_adc_trigger_remove(iio);
iio_triggered_buffer_cleanup(iio);
+ mxs_lradc_adc_trigger_remove(iio);
return 0;
}
diff --git a/drivers/iio/adc/palmas_gpadc.c b/drivers/iio/adc/palmas_gpadc.c
index 7dcd4213d38a..6b76622b4fbf 100644
--- a/drivers/iio/adc/palmas_gpadc.c
+++ b/drivers/iio/adc/palmas_gpadc.c
@@ -633,7 +633,7 @@ out:
static int palmas_gpadc_remove(struct platform_device *pdev)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(&pdev->dev);
+ struct iio_dev *indio_dev = dev_get_drvdata(&pdev->dev);
struct palmas_gpadc *adc = iio_priv(indio_dev);
if (adc->wakeup1_enable || adc->wakeup2_enable)
diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c
index 1c492a7f4587..bb90b22b809c 100644
--- a/drivers/iio/adc/stm32-dfsdm-adc.c
+++ b/drivers/iio/adc/stm32-dfsdm-adc.c
@@ -1099,6 +1099,7 @@ static const struct of_device_id stm32_dfsdm_adc_match[] = {
},
{}
};
+MODULE_DEVICE_TABLE(of, stm32_dfsdm_adc_match);
static int stm32_dfsdm_adc_probe(struct platform_device *pdev)
{
diff --git a/drivers/iio/adc/stx104.c b/drivers/iio/adc/stx104.c
index 0662ca199eb0..49aeb76212fd 100644
--- a/drivers/iio/adc/stx104.c
+++ b/drivers/iio/adc/stx104.c
@@ -23,7 +23,9 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
+#include <linux/mutex.h>
#include <linux/spinlock.h>
+#include <linux/types.h>
#define STX104_OUT_CHAN(chan) { \
.type = IIO_VOLTAGE, \
@@ -53,13 +55,37 @@ module_param_hw_array(base, uint, ioport, &num_stx104, 0);
MODULE_PARM_DESC(base, "Apex Embedded Systems STX104 base addresses");
/**
+ * struct stx104_reg - device register structure
+ * @ssr_ad: Software Strobe Register and ADC Data
+ * @achan: ADC Channel
+ * @dio: Digital I/O
+ * @dac: DAC Channels
+ * @cir_asr: Clear Interrupts and ADC Status
+ * @acr: ADC Control
+ * @pccr_fsh: Pacer Clock Control and FIFO Status MSB
+ * @acfg: ADC Configuration
+ */
+struct stx104_reg {
+ u16 ssr_ad;
+ u8 achan;
+ u8 dio;
+ u16 dac[2];
+ u8 cir_asr;
+ u8 acr;
+ u8 pccr_fsh;
+ u8 acfg;
+};
+
+/**
* struct stx104_iio - IIO device private data structure
+ * @lock: synchronization lock to prevent I/O race conditions
* @chan_out_states: channels' output states
- * @base: base port address of the IIO device
+ * @reg: I/O address offset for the device registers
*/
struct stx104_iio {
+ struct mutex lock;
unsigned int chan_out_states[STX104_NUM_OUT_CHAN];
- unsigned int base;
+ struct stx104_reg __iomem *reg;
};
/**
@@ -72,7 +98,7 @@ struct stx104_iio {
struct stx104_gpio {
struct gpio_chip chip;
spinlock_t lock;
- unsigned int base;
+ u8 __iomem *base;
unsigned int out_state;
};
@@ -80,6 +106,7 @@ static int stx104_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int *val, int *val2, long mask)
{
struct stx104_iio *const priv = iio_priv(indio_dev);
+ struct stx104_reg __iomem *const reg = priv->reg;
unsigned int adc_config;
int adbu;
int gain;
@@ -87,7 +114,7 @@ static int stx104_read_raw(struct iio_dev *indio_dev,
switch (mask) {
case IIO_CHAN_INFO_HARDWAREGAIN:
/* get gain configuration */
- adc_config = inb(priv->base + 11);
+ adc_config = ioread8(&reg->acfg);
gain = adc_config & 0x3;
*val = 1 << gain;
@@ -98,25 +125,31 @@ static int stx104_read_raw(struct iio_dev *indio_dev,
return IIO_VAL_INT;
}
+ mutex_lock(&priv->lock);
+
/* select ADC channel */
- outb(chan->channel | (chan->channel << 4), priv->base + 2);
+ iowrite8(chan->channel | (chan->channel << 4), &reg->achan);
+
+ /* trigger ADC sample capture by writing to the 8-bit
+ * Software Strobe Register and wait for completion
+ */
+ iowrite8(0, &reg->ssr_ad);
+ while (ioread8(&reg->cir_asr) & BIT(7));
- /* trigger ADC sample capture and wait for completion */
- outb(0, priv->base);
- while (inb(priv->base + 8) & BIT(7));
+ *val = ioread16(&reg->ssr_ad);
- *val = inw(priv->base);
+ mutex_unlock(&priv->lock);
return IIO_VAL_INT;
case IIO_CHAN_INFO_OFFSET:
/* get ADC bipolar/unipolar configuration */
- adc_config = inb(priv->base + 11);
+ adc_config = ioread8(&reg->acfg);
adbu = !(adc_config & BIT(2));
*val = -32768 * adbu;
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
/* get ADC bipolar/unipolar and gain configuration */
- adc_config = inb(priv->base + 11);
+ adc_config = ioread8(&reg->acfg);
adbu = !(adc_config & BIT(2));
gain = adc_config & 0x3;
@@ -138,16 +171,16 @@ static int stx104_write_raw(struct iio_dev *indio_dev,
/* Only four gain states (x1, x2, x4, x8) */
switch (val) {
case 1:
- outb(0, priv->base + 11);
+ iowrite8(0, &priv->reg->acfg);
break;
case 2:
- outb(1, priv->base + 11);
+ iowrite8(1, &priv->reg->acfg);
break;
case 4:
- outb(2, priv->base + 11);
+ iowrite8(2, &priv->reg->acfg);
break;
case 8:
- outb(3, priv->base + 11);
+ iowrite8(3, &priv->reg->acfg);
break;
default:
return -EINVAL;
@@ -160,9 +193,12 @@ static int stx104_write_raw(struct iio_dev *indio_dev,
if ((unsigned int)val > 65535)
return -EINVAL;
+ mutex_lock(&priv->lock);
+
priv->chan_out_states[chan->channel] = val;
- outw(val, priv->base + 4 + 2 * chan->channel);
+ iowrite16(val, &priv->reg->dac[chan->channel]);
+ mutex_unlock(&priv->lock);
return 0;
}
return -EINVAL;
@@ -230,7 +266,7 @@ static int stx104_gpio_get(struct gpio_chip *chip, unsigned int offset)
if (offset >= 4)
return -EINVAL;
- return !!(inb(stx104gpio->base) & BIT(offset));
+ return !!(ioread8(stx104gpio->base) & BIT(offset));
}
static int stx104_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
@@ -238,7 +274,7 @@ static int stx104_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
{
struct stx104_gpio *const stx104gpio = gpiochip_get_data(chip);
- *bits = inb(stx104gpio->base);
+ *bits = ioread8(stx104gpio->base);
return 0;
}
@@ -260,7 +296,7 @@ static void stx104_gpio_set(struct gpio_chip *chip, unsigned int offset,
else
stx104gpio->out_state &= ~mask;
- outb(stx104gpio->out_state, stx104gpio->base);
+ iowrite8(stx104gpio->out_state, stx104gpio->base);
spin_unlock_irqrestore(&stx104gpio->lock, flags);
}
@@ -287,7 +323,7 @@ static void stx104_gpio_set_multiple(struct gpio_chip *chip,
stx104gpio->out_state &= ~*mask;
stx104gpio->out_state |= *mask & *bits;
- outb(stx104gpio->out_state, stx104gpio->base);
+ iowrite8(stx104gpio->out_state, stx104gpio->base);
spin_unlock_irqrestore(&stx104gpio->lock, flags);
}
@@ -314,11 +350,16 @@ static int stx104_probe(struct device *dev, unsigned int id)
return -EBUSY;
}
+ priv = iio_priv(indio_dev);
+ priv->reg = devm_ioport_map(dev, base[id], STX104_EXTENT);
+ if (!priv->reg)
+ return -ENOMEM;
+
indio_dev->info = &stx104_info;
indio_dev->modes = INDIO_DIRECT_MODE;
/* determine if differential inputs */
- if (inb(base[id] + 8) & BIT(5)) {
+ if (ioread8(&priv->reg->cir_asr) & BIT(5)) {
indio_dev->num_channels = ARRAY_SIZE(stx104_channels_diff);
indio_dev->channels = stx104_channels_diff;
} else {
@@ -329,18 +370,17 @@ static int stx104_probe(struct device *dev, unsigned int id)
indio_dev->name = dev_name(dev);
indio_dev->dev.parent = dev;
- priv = iio_priv(indio_dev);
- priv->base = base[id];
+ mutex_init(&priv->lock);
/* configure device for software trigger operation */
- outb(0, base[id] + 9);
+ iowrite8(0, &priv->reg->acr);
/* initialize gain setting to x1 */
- outb(0, base[id] + 11);
+ iowrite8(0, &priv->reg->acfg);
/* initialize DAC output to 0V */
- outw(0, base[id] + 4);
- outw(0, base[id] + 6);
+ iowrite16(0, &priv->reg->dac[0]);
+ iowrite16(0, &priv->reg->dac[1]);
stx104gpio->chip.label = dev_name(dev);
stx104gpio->chip.parent = dev;
@@ -355,7 +395,7 @@ static int stx104_probe(struct device *dev, unsigned int id)
stx104gpio->chip.get_multiple = stx104_gpio_get_multiple;
stx104gpio->chip.set = stx104_gpio_set;
stx104gpio->chip.set_multiple = stx104_gpio_set_multiple;
- stx104gpio->base = base[id] + 3;
+ stx104gpio->base = &priv->reg->dio;
stx104gpio->out_state = 0x0;
spin_lock_init(&stx104gpio->lock);
diff --git a/drivers/iio/adc/twl6030-gpadc.c b/drivers/iio/adc/twl6030-gpadc.c
index 765aaee157e2..3007cfbf8491 100644
--- a/drivers/iio/adc/twl6030-gpadc.c
+++ b/drivers/iio/adc/twl6030-gpadc.c
@@ -71,6 +71,18 @@
#define TWL6030_GPADCS BIT(1)
#define TWL6030_GPADCR BIT(0)
+#define USB_VBUS_CTRL_SET 0x04
+#define USB_ID_CTRL_SET 0x06
+
+#define TWL6030_MISC1 0xE4
+#define VBUS_MEAS 0x01
+#define ID_MEAS 0x01
+
+#define VAC_MEAS 0x04
+#define VBAT_MEAS 0x02
+#define BB_MEAS 0x01
+
+
/**
* struct twl6030_chnl_calib - channel calibration
* @gain: slope coefficient for ideal curve
@@ -943,6 +955,26 @@ static int twl6030_gpadc_probe(struct platform_device *pdev)
return ret;
}
+ ret = twl_i2c_write_u8(TWL_MODULE_USB, VBUS_MEAS, USB_VBUS_CTRL_SET);
+ if (ret < 0) {
+ dev_err(dev, "failed to wire up inputs\n");
+ return ret;
+ }
+
+ ret = twl_i2c_write_u8(TWL_MODULE_USB, ID_MEAS, USB_ID_CTRL_SET);
+ if (ret < 0) {
+ dev_err(dev, "failed to wire up inputs\n");
+ return ret;
+ }
+
+ ret = twl_i2c_write_u8(TWL6030_MODULE_ID0,
+ VBAT_MEAS | BB_MEAS | VAC_MEAS,
+ TWL6030_MISC1);
+ if (ret < 0) {
+ dev_err(dev, "failed to wire up inputs\n");
+ return ret;
+ }
+
indio_dev->name = DRIVER_NAME;
indio_dev->dev.parent = dev;
indio_dev->info = &twl6030_gpadc_iio_info;
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-05 04:40:49 +0000