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Diffstat (limited to 'drivers/iio/adc/adi-axi-adc.c')
-rw-r--r--drivers/iio/adc/adi-axi-adc.c159
1 files changed, 67 insertions, 92 deletions
diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
index aff0532a974a..c247ff1541d2 100644
--- a/drivers/iio/adc/adi-axi-adc.c
+++ b/drivers/iio/adc/adi-axi-adc.c
@@ -14,6 +14,7 @@
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/property.h>
+#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/iio/iio.h>
@@ -62,7 +63,7 @@ struct adi_axi_adc_state {
struct mutex lock;
struct adi_axi_adc_client *client;
- void __iomem *regs;
+ struct regmap *regmap;
};
struct adi_axi_adc_client {
@@ -90,19 +91,6 @@ void *adi_axi_adc_conv_priv(struct adi_axi_adc_conv *conv)
}
EXPORT_SYMBOL_NS_GPL(adi_axi_adc_conv_priv, IIO_ADI_AXI);
-static void adi_axi_adc_write(struct adi_axi_adc_state *st,
- unsigned int reg,
- unsigned int val)
-{
- iowrite32(val, st->regs + reg);
-}
-
-static unsigned int adi_axi_adc_read(struct adi_axi_adc_state *st,
- unsigned int reg)
-{
- return ioread32(st->regs + reg);
-}
-
static int adi_axi_adc_config_dma_buffer(struct device *dev,
struct iio_dev *indio_dev)
{
@@ -144,22 +132,39 @@ static int adi_axi_adc_write_raw(struct iio_dev *indio_dev,
return conv->write_raw(conv, chan, val, val2, mask);
}
+static int adi_axi_adc_read_avail(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ const int **vals, int *type, int *length,
+ long mask)
+{
+ struct adi_axi_adc_state *st = iio_priv(indio_dev);
+ struct adi_axi_adc_conv *conv = &st->client->conv;
+
+ if (!conv->read_avail)
+ return -EOPNOTSUPP;
+
+ return conv->read_avail(conv, chan, vals, type, length, mask);
+}
+
static int adi_axi_adc_update_scan_mode(struct iio_dev *indio_dev,
const unsigned long *scan_mask)
{
struct adi_axi_adc_state *st = iio_priv(indio_dev);
struct adi_axi_adc_conv *conv = &st->client->conv;
- unsigned int i, ctrl;
+ unsigned int i;
+ int ret;
for (i = 0; i < conv->chip_info->num_channels; i++) {
- ctrl = adi_axi_adc_read(st, ADI_AXI_REG_CHAN_CTRL(i));
-
if (test_bit(i, scan_mask))
- ctrl |= ADI_AXI_REG_CHAN_CTRL_ENABLE;
+ ret = regmap_set_bits(st->regmap,
+ ADI_AXI_REG_CHAN_CTRL(i),
+ ADI_AXI_REG_CHAN_CTRL_ENABLE);
else
- ctrl &= ~ADI_AXI_REG_CHAN_CTRL_ENABLE;
-
- adi_axi_adc_write(st, ADI_AXI_REG_CHAN_CTRL(i), ctrl);
+ ret = regmap_clear_bits(st->regmap,
+ ADI_AXI_REG_CHAN_CTRL(i),
+ ADI_AXI_REG_CHAN_CTRL_ENABLE);
+ if (ret)
+ return ret;
}
return 0;
@@ -228,69 +233,11 @@ struct adi_axi_adc_conv *devm_adi_axi_adc_conv_register(struct device *dev,
}
EXPORT_SYMBOL_NS_GPL(devm_adi_axi_adc_conv_register, IIO_ADI_AXI);
-static ssize_t in_voltage_scale_available_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct adi_axi_adc_state *st = iio_priv(indio_dev);
- struct adi_axi_adc_conv *conv = &st->client->conv;
- size_t len = 0;
- int i;
-
- for (i = 0; i < conv->chip_info->num_scales; i++) {
- const unsigned int *s = conv->chip_info->scale_table[i];
-
- len += scnprintf(buf + len, PAGE_SIZE - len,
- "%u.%06u ", s[0], s[1]);
- }
- buf[len - 1] = '\n';
-
- return len;
-}
-
-static IIO_DEVICE_ATTR_RO(in_voltage_scale_available, 0);
-
-enum {
- ADI_AXI_ATTR_SCALE_AVAIL,
-};
-
-#define ADI_AXI_ATTR(_en_, _file_) \
- [ADI_AXI_ATTR_##_en_] = &iio_dev_attr_##_file_.dev_attr.attr
-
-static struct attribute *adi_axi_adc_attributes[] = {
- ADI_AXI_ATTR(SCALE_AVAIL, in_voltage_scale_available),
- NULL
-};
-
-static umode_t axi_adc_attr_is_visible(struct kobject *kobj,
- struct attribute *attr, int n)
-{
- struct device *dev = kobj_to_dev(kobj);
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct adi_axi_adc_state *st = iio_priv(indio_dev);
- struct adi_axi_adc_conv *conv = &st->client->conv;
-
- switch (n) {
- case ADI_AXI_ATTR_SCALE_AVAIL:
- if (!conv->chip_info->num_scales)
- return 0;
- return attr->mode;
- default:
- return attr->mode;
- }
-}
-
-static const struct attribute_group adi_axi_adc_attribute_group = {
- .attrs = adi_axi_adc_attributes,
- .is_visible = axi_adc_attr_is_visible,
-};
-
static const struct iio_info adi_axi_adc_info = {
.read_raw = &adi_axi_adc_read_raw,
.write_raw = &adi_axi_adc_write_raw,
- .attrs = &adi_axi_adc_attribute_group,
.update_scan_mode = &adi_axi_adc_update_scan_mode,
+ .read_avail = &adi_axi_adc_read_avail,
};
static const struct adi_axi_adc_core_info adi_axi_adc_10_0_a_info = {
@@ -354,21 +301,32 @@ static int adi_axi_adc_setup_channels(struct device *dev,
}
for (i = 0; i < conv->chip_info->num_channels; i++) {
- adi_axi_adc_write(st, ADI_AXI_REG_CHAN_CTRL(i),
- ADI_AXI_REG_CHAN_CTRL_DEFAULTS);
+ ret = regmap_write(st->regmap, ADI_AXI_REG_CHAN_CTRL(i),
+ ADI_AXI_REG_CHAN_CTRL_DEFAULTS);
+ if (ret)
+ return ret;
}
return 0;
}
-static void axi_adc_reset(struct adi_axi_adc_state *st)
+static int axi_adc_reset(struct adi_axi_adc_state *st)
{
- adi_axi_adc_write(st, ADI_AXI_REG_RSTN, 0);
+ int ret;
+
+ ret = regmap_write(st->regmap, ADI_AXI_REG_RSTN, 0);
+ if (ret)
+ return ret;
+
mdelay(10);
- adi_axi_adc_write(st, ADI_AXI_REG_RSTN, ADI_AXI_REG_RSTN_MMCM_RSTN);
+ ret = regmap_write(st->regmap, ADI_AXI_REG_RSTN,
+ ADI_AXI_REG_RSTN_MMCM_RSTN);
+ if (ret)
+ return ret;
+
mdelay(10);
- adi_axi_adc_write(st, ADI_AXI_REG_RSTN,
- ADI_AXI_REG_RSTN_RSTN | ADI_AXI_REG_RSTN_MMCM_RSTN);
+ return regmap_write(st->regmap, ADI_AXI_REG_RSTN,
+ ADI_AXI_REG_RSTN_RSTN | ADI_AXI_REG_RSTN_MMCM_RSTN);
}
static void adi_axi_adc_cleanup(void *data)
@@ -379,12 +337,20 @@ static void adi_axi_adc_cleanup(void *data)
module_put(cl->dev->driver->owner);
}
+static const struct regmap_config axi_adc_regmap_config = {
+ .val_bits = 32,
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .max_register = 0x0800,
+};
+
static int adi_axi_adc_probe(struct platform_device *pdev)
{
struct adi_axi_adc_conv *conv;
struct iio_dev *indio_dev;
struct adi_axi_adc_client *cl;
struct adi_axi_adc_state *st;
+ void __iomem *base;
unsigned int ver;
int ret;
@@ -405,15 +371,24 @@ static int adi_axi_adc_probe(struct platform_device *pdev)
cl->state = st;
mutex_init(&st->lock);
- st->regs = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(st->regs))
- return PTR_ERR(st->regs);
+ base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ st->regmap = devm_regmap_init_mmio(&pdev->dev, base,
+ &axi_adc_regmap_config);
+ if (IS_ERR(st->regmap))
+ return PTR_ERR(st->regmap);
conv = &st->client->conv;
- axi_adc_reset(st);
+ ret = axi_adc_reset(st);
+ if (ret)
+ return ret;
- ver = adi_axi_adc_read(st, ADI_AXI_REG_VERSION);
+ ret = regmap_read(st->regmap, ADI_AXI_REG_VERSION, &ver);
+ if (ret)
+ return ret;
if (cl->info->version > ver) {
dev_err(&pdev->dev,
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-07 15:40:59 +0100