AD7091R designs may differ on their communication protocol and resources
required for proper setup. Extract what is design specific into a
init_info struct so the base driver can use data and callback functions
from that struct rather than checking which specific chip is connected
during device initialization.
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@xxxxxxxxxx>
---
drivers/iio/adc/ad7091r-base.c | 27 ++++++++++-----------
drivers/iio/adc/ad7091r-base.h | 15 +++++++++---
drivers/iio/adc/ad7091r5.c | 43 ++++++++++++++++++++++++----------
3 files changed, 55 insertions(+), 30 deletions(-)
diff --git a/drivers/iio/adc/ad7091r-base.c b/drivers/iio/adc/ad7091r-base.c
index 0d1f544de07a..ad4b4d591e1a 100644
--- a/drivers/iio/adc/ad7091r-base.c
+++ b/drivers/iio/adc/ad7091r-base.c
@@ -207,7 +207,7 @@ static void ad7091r_remove(void *data)
}
int ad7091r_probe(struct device *dev, const char *name,
- const struct ad7091r_chip_info *chip_info,
+ const struct ad7091r_init_info *init_info,
struct regmap *map, int irq)
{
struct iio_dev *iio_dev;
@@ -220,17 +220,16 @@ int ad7091r_probe(struct device *dev, const char *name,
st = iio_priv(iio_dev);
st->dev = dev;
- st->chip_info = chip_info;
- st->map = map;
+ init_info->init_adc_regmap(st, init_info->regmap_config);
+ if (IS_ERR(st->map))
+ return dev_err_probe(st->dev, PTR_ERR(st->map),
+ "Error initializing regmap\n");
- iio_dev->name = name;
iio_dev->info = &ad7091r_info;
iio_dev->modes = INDIO_DIRECT_MODE;
- iio_dev->num_channels = chip_info->num_channels;
- iio_dev->channels = chip_info->channels;
-
if (irq) {
+ st->chip_info = &init_info->irq_info;
ret = regmap_update_bits(st->map, AD7091R_REG_CONF,
AD7091R_REG_CONF_ALERT_EN, BIT(4));
if (ret)
@@ -242,8 +241,14 @@ int ad7091r_probe(struct device *dev, const char *name,
IRQF_ONESHOT, name, iio_dev);
if (ret)
return ret;
+ } else {
+ st->chip_info = &init_info->info_no_irq;
}
+ iio_dev->name = st->chip_info->name;
+ iio_dev->num_channels = st->chip_info->num_channels;
+ iio_dev->channels = st->chip_info->channels;
+
st->vref = devm_regulator_get_optional(dev, "vref");
if (IS_ERR(st->vref)) {
if (PTR_ERR(st->vref) == -EPROBE_DEFER)
@@ -291,14 +296,6 @@ bool ad7091r_volatile_reg(struct device *dev, unsigned int reg)
}
EXPORT_SYMBOL_NS_GPL(ad7091r_volatile_reg, IIO_AD7091R);
-const struct regmap_config ad7091r_regmap_config = {
- .reg_bits = 8,
- .val_bits = 16,
- .writeable_reg = ad7091r_writeable_reg,
- .volatile_reg = ad7091r_volatile_reg,
-};
-EXPORT_SYMBOL_NS_GPL(ad7091r_regmap_config, IIO_AD7091R);
-
MODULE_AUTHOR("Beniamin Bia <beniamin.bia@xxxxxxxxxx>");
MODULE_DESCRIPTION("Analog Devices AD7091Rx multi-channel converters");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/adc/ad7091r-base.h b/drivers/iio/adc/ad7091r-base.h
index 1d30eeb46bcc..51649570bb5d 100644
--- a/drivers/iio/adc/ad7091r-base.h
+++ b/drivers/iio/adc/ad7091r-base.h
@@ -8,6 +8,8 @@
#ifndef __DRIVERS_IIO_ADC_AD7091R_BASE_H__
#define __DRIVERS_IIO_ADC_AD7091R_BASE_H__
+#include <linux/regmap.h>
+
#define AD7091R_REG_RESULT 0
#define AD7091R_REG_CHANNEL 1
#define AD7091R_REG_CONF 2
@@ -47,17 +49,24 @@ struct ad7091r_state {
};
struct ad7091r_chip_info {
+ const char *name;
unsigned int num_channels;
const struct iio_chan_spec *channels;
unsigned int vref_mV;
};
-extern const struct iio_event_spec ad7091r_events[3];
+struct ad7091r_init_info {
+ struct ad7091r_chip_info irq_info;
+ struct ad7091r_chip_info info_no_irq;
+ const struct regmap_config *regmap_config;
+ void (*init_adc_regmap)(struct ad7091r_state *st,
+ const struct regmap_config *regmap_conf);
+};
-extern const struct regmap_config ad7091r_regmap_config;
+extern const struct iio_event_spec ad7091r_events[3];
int ad7091r_probe(struct device *dev, const char *name,
- const struct ad7091r_chip_info *chip_info,
+ const struct ad7091r_init_info *init_info,
struct regmap *map, int irq);
bool ad7091r_volatile_reg(struct device *dev, unsigned int reg);
diff --git a/drivers/iio/adc/ad7091r5.c b/drivers/iio/adc/ad7091r5.c
index 9d3ccfca94ec..69b436920e2d 100644
--- a/drivers/iio/adc/ad7091r5.c
+++ b/drivers/iio/adc/ad7091r5.c
@@ -27,42 +27,61 @@ static const struct iio_chan_spec ad7091r5_channels_noirq[] = {
};
static const struct ad7091r_chip_info ad7091r5_chip_info_irq = {
+ .name = "ad7091r-5",
.channels = ad7091r5_channels_irq,
.num_channels = ARRAY_SIZE(ad7091r5_channels_irq),
.vref_mV = 2500,
};
static const struct ad7091r_chip_info ad7091r5_chip_info_noirq = {
+ .name = "ad7091r-5",
.channels = ad7091r5_channels_noirq,
.num_channels = ARRAY_SIZE(ad7091r5_channels_noirq),
.vref_mV = 2500,
};
+static const struct regmap_config ad7091r_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 16,
+ .writeable_reg = ad7091r_writeable_reg,
+ .volatile_reg = ad7091r_volatile_reg,
+};
+
+static void ad7091r5_regmap_init(struct ad7091r_state *st,
+ const struct regmap_config *regmap_conf)
+{
+ struct i2c_client *i2c = container_of(st->dev, struct i2c_client, dev);
+
+ st->map = devm_regmap_init_i2c(i2c, regmap_conf);
+}
+
+static struct ad7091r_init_info ad7091r5_init_info = {
+ .irq_info = ad7091r5_chip_info_irq,
+ .info_no_irq = ad7091r5_chip_info_noirq,
+ .regmap_config = &ad7091r_regmap_config,
+ .init_adc_regmap = &ad7091r5_regmap_init
+};
+
static int ad7091r5_i2c_probe(struct i2c_client *i2c)
{
const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
- const struct ad7091r_chip_info *chip_info;
- struct regmap *map = devm_regmap_init_i2c(i2c, &ad7091r_regmap_config);
-
- if (IS_ERR(map))
- return PTR_ERR(map);
+ const struct ad7091r_init_info *init_info;
- if (i2c->irq)
- chip_info = &ad7091r5_chip_info_irq;
- else
- chip_info = &ad7091r5_chip_info_noirq;
+ init_info = i2c_get_match_data(i2c);
+ if (!init_info)
+ return -EINVAL;
- return ad7091r_probe(&i2c->dev, id->name, chip_info, map, i2c->irq);
+ return ad7091r_probe(&i2c->dev, id->name, init_info, NULL, i2c->irq);
}
static const struct of_device_id ad7091r5_dt_ids[] = {
- { .compatible = "adi,ad7091r5" },
+ { .compatible = "adi,ad7091r5", .data = &ad7091r5_init_info },
{},
};
MODULE_DEVICE_TABLE(of, ad7091r5_dt_ids);
static const struct i2c_device_id ad7091r5_i2c_ids[] = {
- {"ad7091r5", 0},
+ {"ad7091r5", (kernel_ulong_t)&ad7091r5_init_info },
{}
};
MODULE_DEVICE_TABLE(i2c, ad7091r5_i2c_ids);
--
2.42.0
