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iio: light: ltr501: Add ltr329 driver support

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This adds support for the LTR-329ALS-01 chip, which is similar to
LTR-303ALS-01, except for interrupt, which LTR-329ALS-01 chip does not
have.

Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Acked-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Esben Haabendal <esben@geanix.com>
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
This commit is contained in:
Esben Haabendal 2026-08-17 19:08:55 +02:00 committed by Jonathan Cameron
parent 8a9bcd587d
commit e5aaf9e06c
1 changed files with 41 additions and 6 deletions
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47
drivers/iio/light/ltr501.c
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@ -9,6 +9,7 @@
* TODO: IR LED characteristics
*/
#include <linux/array_size.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/err.h>
@ -94,6 +95,7 @@ enum {
ltr559,
ltr301,
ltr303,
ltr329,
};
struct ltr501_gain {
@ -140,6 +142,7 @@ struct ltr501_chip_info {
u8 als_mode_active;
u8 als_gain_mask;
u8 als_gain_shift;
bool no_irq_support;
struct iio_chan_spec const *channels;
const int no_channels;
const struct iio_info *info;
@ -178,6 +181,11 @@ static const struct ltr501_samp_table ltr501_ps_samp_table[] = {
{500000, 2000000}
};
static bool ltr501_has_irq_support(const struct ltr501_chip_info *info)
{
return !info->no_irq_support;
}
static int ltr501_match_samp_freq(const struct ltr501_samp_table *tab,
int len, int val, int val2)
{
@ -821,6 +829,9 @@ static int __ltr501_write_raw(struct iio_dev *indio_dev,
if (ret < 0)
return ret;
if (!ltr501_has_irq_support(info))
return ret;
/* update persistence count when changing frequency */
ret = ltr501_write_intr_prst(data, chan->type,
0, data->als_period);
@ -840,6 +851,9 @@ static int __ltr501_write_raw(struct iio_dev *indio_dev,
if (ret < 0)
return ret;
if (!ltr501_has_irq_support(info))
return ret;
/* update persistence count when changing frequency */
ret = ltr501_write_intr_prst(data, chan->type,
0, data->ps_period);
@ -1257,6 +1271,18 @@ static const struct ltr501_chip_info ltr501_chip_info_tbl[] = {
.channels = ltr301_channels,
.no_channels = ARRAY_SIZE(ltr301_channels),
},
[ltr329] = {
.partid = 0x0A,
.als_gain = ltr559_als_gain_tbl,
.als_gain_tbl_size = ARRAY_SIZE(ltr559_als_gain_tbl),
.als_mode_active = BIT(0),
.als_gain_mask = BIT(2) | BIT(3) | BIT(4),
.als_gain_shift = 2,
.no_irq_support = true,
.info_no_irq = &ltr301_info_no_irq,
.channels = ltr301_channels,
.no_channels = ARRAY_SIZE(ltr301_channels),
},
};
static int ltr501_write_contr(struct ltr501_data *data, u8 als_val, u8 ps_val)
@ -1369,13 +1395,15 @@ static int ltr501_init(struct ltr501_data *data)
data->ps_contr = status | LTR501_CONTR_ACTIVE;
ret = ltr501_read_intr_prst(data, IIO_INTENSITY, &data->als_period);
if (ret < 0)
return ret;
if (ltr501_has_irq_support(data->chip_info)) {
ret = ltr501_read_intr_prst(data, IIO_INTENSITY, &data->als_period);
if (ret < 0)
return ret;
ret = ltr501_read_intr_prst(data, IIO_PROXIMITY, &data->ps_period);
if (ret < 0)
return ret;
ret = ltr501_read_intr_prst(data, IIO_PROXIMITY, &data->ps_period);
if (ret < 0)
return ret;
}
return ltr501_write_contr(data, data->als_contr, data->ps_contr);
}
@ -1530,6 +1558,11 @@ static int ltr501_probe(struct i2c_client *client)
if (ret < 0)
return ret;
if (!ltr501_has_irq_support(data->chip_info) && client->irq > 0) {
client->irq = 0;
dev_warn(&client->dev, "chip doesn't support IRQ");
}
if (client->irq > 0) {
ret = devm_request_threaded_irq(&client->dev, client->irq,
NULL, ltr501_interrupt_handler,
@ -1601,6 +1634,7 @@ static const struct i2c_device_id ltr501_id[] = {
{ .name = "ltr559", .driver_data = ltr559 },
{ .name = "ltr301", .driver_data = ltr301 },
{ .name = "ltr303", .driver_data = ltr303 },
{ .name = "ltr329", .driver_data = ltr329 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ltr501_id);
@ -1610,6 +1644,7 @@ static const struct of_device_id ltr501_of_match[] = {
{ .compatible = "liteon,ltr559", },
{ .compatible = "liteon,ltr301", },
{ .compatible = "liteon,ltr303", },
{ .compatible = "liteon,ltr329", },
{ }
};
MODULE_DEVICE_TABLE(of, ltr501_of_match);