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path: root/drivers/iio/adc/at91_adc.c
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Diffstat (limited to 'drivers/iio/adc/at91_adc.c')
-rw-r--r--drivers/iio/adc/at91_adc.c80
1 files changed, 36 insertions, 44 deletions
diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 171288a4ab9a..d746a18143cd 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -207,6 +207,8 @@ struct at91_adc_caps {
u8 low_res_bits;
u8 high_res_bits;
+ u32 trigger_number;
+ const struct at91_adc_trigger *triggers;
struct at91_adc_reg_desc registers;
};
@@ -227,8 +229,6 @@ struct at91_adc_state {
u8 sample_hold_time;
bool sleep_mode;
struct iio_trigger **trig;
- struct at91_adc_trigger *trigger_list;
- u32 trigger_number;
bool use_external;
u32 vref_mv;
u32 res; /* resolution used for convertions */
@@ -537,13 +537,13 @@ static int at91_adc_channel_init(struct iio_dev *idev)
}
static int at91_adc_get_trigger_value_by_name(struct iio_dev *idev,
- struct at91_adc_trigger *triggers,
+ const struct at91_adc_trigger *triggers,
const char *trigger_name)
{
struct at91_adc_state *st = iio_priv(idev);
int i;
- for (i = 0; i < st->trigger_number; i++) {
+ for (i = 0; i < st->caps->trigger_number; i++) {
char *name = kasprintf(GFP_KERNEL,
"%s-dev%d-%s",
idev->name,
@@ -575,7 +575,7 @@ static int at91_adc_configure_trigger(struct iio_trigger *trig, bool state)
u8 bit;
value = at91_adc_get_trigger_value_by_name(idev,
- st->trigger_list,
+ st->caps->triggers,
idev->trig->name);
if (value < 0)
return value;
@@ -620,7 +620,7 @@ static const struct iio_trigger_ops at91_adc_trigger_ops = {
};
static struct iio_trigger *at91_adc_allocate_trigger(struct iio_dev *idev,
- struct at91_adc_trigger *trigger)
+ const struct at91_adc_trigger *trigger)
{
struct iio_trigger *trig;
int ret;
@@ -647,7 +647,7 @@ static int at91_adc_trigger_init(struct iio_dev *idev)
int i, ret;
st->trig = devm_kcalloc(&idev->dev,
- st->trigger_number, sizeof(*st->trig),
+ st->caps->trigger_number, sizeof(*st->trig),
GFP_KERNEL);
if (st->trig == NULL) {
@@ -655,12 +655,12 @@ static int at91_adc_trigger_init(struct iio_dev *idev)
goto error_ret;
}
- for (i = 0; i < st->trigger_number; i++) {
- if (st->trigger_list[i].is_external && !(st->use_external))
+ for (i = 0; i < st->caps->trigger_number; i++) {
+ if (st->caps->triggers[i].is_external && !(st->use_external))
continue;
st->trig[i] = at91_adc_allocate_trigger(idev,
- st->trigger_list + i);
+ st->caps->triggers + i);
if (st->trig[i] == NULL) {
dev_err(&idev->dev,
"Could not allocate trigger %d\n", i);
@@ -685,7 +685,7 @@ static void at91_adc_trigger_remove(struct iio_dev *idev)
struct at91_adc_state *st = iio_priv(idev);
int i;
- for (i = 0; i < st->trigger_number; i++) {
+ for (i = 0; i < st->caps->trigger_number; i++) {
iio_trigger_unregister(st->trig[i]);
iio_trigger_free(st->trig[i]);
}
@@ -836,8 +836,7 @@ static int at91_adc_probe_dt(struct iio_dev *idev,
{
struct at91_adc_state *st = iio_priv(idev);
struct device_node *node = pdev->dev.of_node;
- struct device_node *trig_node;
- int i = 0, ret;
+ int ret;
u32 prop;
char *s;
@@ -882,37 +881,6 @@ static int at91_adc_probe_dt(struct iio_dev *idev,
st->registers = &st->caps->registers;
st->num_channels = st->caps->num_channels;
- st->trigger_number = of_get_child_count(node);
- st->trigger_list = devm_kcalloc(&idev->dev,
- st->trigger_number,
- sizeof(struct at91_adc_trigger),
- GFP_KERNEL);
- if (!st->trigger_list) {
- dev_err(&idev->dev, "Could not allocate trigger list memory.\n");
- ret = -ENOMEM;
- goto error_ret;
- }
-
- for_each_child_of_node(node, trig_node) {
- struct at91_adc_trigger *trig = st->trigger_list + i;
- const char *name;
-
- if (of_property_read_string(trig_node, "trigger-name", &name)) {
- dev_err(&idev->dev, "Missing trigger-name property in the DT.\n");
- ret = -EINVAL;
- goto error_ret;
- }
- trig->name = name;
-
- if (of_property_read_u32(trig_node, "trigger-value", &prop)) {
- dev_err(&idev->dev, "Missing trigger-value property in the DT.\n");
- ret = -EINVAL;
- goto error_ret;
- }
- trig->value = prop;
- trig->is_external = of_property_read_bool(trig_node, "trigger-external");
- i++;
- }
/* Check if touchscreen is supported. */
if (st->caps->has_ts)
@@ -1312,6 +1280,13 @@ static int at91_adc_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(at91_adc_pm_ops, at91_adc_suspend, at91_adc_resume);
+static const struct at91_adc_trigger at91sam9260_triggers[] = {
+ { .name = "timer-counter-0", .value = 0x1 },
+ { .name = "timer-counter-1", .value = 0x3 },
+ { .name = "timer-counter-2", .value = 0x5 },
+ { .name = "external", .value = 0xd, .is_external = true },
+};
+
static struct at91_adc_caps at91sam9260_caps = {
.calc_startup_ticks = calc_startup_ticks_9260,
.num_channels = 4,
@@ -1325,6 +1300,15 @@ static struct at91_adc_caps at91sam9260_caps = {
.mr_prescal_mask = AT91_ADC_PRESCAL_9260,
.mr_startup_mask = AT91_ADC_STARTUP_9260,
},
+ .triggers = at91sam9260_triggers,
+ .trigger_number = ARRAY_SIZE(at91sam9260_triggers),
+};
+
+static const struct at91_adc_trigger at91sam9x5_triggers[] = {
+ { .name = "external-rising", .value = 0x1, .is_external = true },
+ { .name = "external-falling", .value = 0x2, .is_external = true },
+ { .name = "external-any", .value = 0x3, .is_external = true },
+ { .name = "continuous", .value = 0x6 },
};
static struct at91_adc_caps at91sam9rl_caps = {
@@ -1341,6 +1325,8 @@ static struct at91_adc_caps at91sam9rl_caps = {
.mr_prescal_mask = AT91_ADC_PRESCAL_9260,
.mr_startup_mask = AT91_ADC_STARTUP_9G45,
},
+ .triggers = at91sam9x5_triggers,
+ .trigger_number = ARRAY_SIZE(at91sam9x5_triggers),
};
static struct at91_adc_caps at91sam9g45_caps = {
@@ -1357,6 +1343,8 @@ static struct at91_adc_caps at91sam9g45_caps = {
.mr_prescal_mask = AT91_ADC_PRESCAL_9G45,
.mr_startup_mask = AT91_ADC_STARTUP_9G45,
},
+ .triggers = at91sam9x5_triggers,
+ .trigger_number = ARRAY_SIZE(at91sam9x5_triggers),
};
static struct at91_adc_caps at91sam9x5_caps = {
@@ -1377,6 +1365,8 @@ static struct at91_adc_caps at91sam9x5_caps = {
.mr_prescal_mask = AT91_ADC_PRESCAL_9G45,
.mr_startup_mask = AT91_ADC_STARTUP_9X5,
},
+ .triggers = at91sam9x5_triggers,
+ .trigger_number = ARRAY_SIZE(at91sam9x5_triggers),
};
static struct at91_adc_caps sama5d3_caps = {
@@ -1396,6 +1386,8 @@ static struct at91_adc_caps sama5d3_caps = {
.mr_prescal_mask = AT91_ADC_PRESCAL_9G45,
.mr_startup_mask = AT91_ADC_STARTUP_9X5,
},
+ .triggers = at91sam9x5_triggers,
+ .trigger_number = ARRAY_SIZE(at91sam9x5_triggers),
};
static const struct of_device_id at91_adc_dt_ids[] = {
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-15 23:16:24 +0300