[PATCH v4 2/5] iio: adc: ad7380: enable regmap cache

Julien Stephan
2025-01-08T12:49:46Z

Enable regmap cache, to avoid useless access on spi bus.

Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Julien Stephan <jstephan@baylibre.com>
---
drivers/iio/adc/ad7380.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/drivers/iio/adc/ad7380.c b/drivers/iio/adc/ad7380.c
index bc7d58850a3e2a84a241d81377e3dc14c43fc101..b97d2978289e92ad502cd6a67de43d2b51cdab56 100644
--- a/drivers/iio/adc/ad7380.c
+++ b/drivers/iio/adc/ad7380.c
@@ -663,6 +663,20 @@ static int ad7380_regmap_reg_read(void *context, unsigned int reg,
return 0;
}

+static const struct reg_default ad7380_reg_defaults[] = {
+ { AD7380_REG_ADDR_ALERT_LOW_TH, 0x800 },
+ { AD7380_REG_ADDR_ALERT_HIGH_TH, 0x7FF },
+};
+
+static const struct regmap_range ad7380_volatile_reg_ranges[] = {
+ regmap_reg_range(AD7380_REG_ADDR_CONFIG2, AD7380_REG_ADDR_ALERT),
+};
+
+static const struct regmap_access_table ad7380_volatile_regs = {
+ .yes_ranges = ad7380_volatile_reg_ranges,
+ .n_yes_ranges = ARRAY_SIZE(ad7380_volatile_reg_ranges),
+};
+
static const struct regmap_config ad7380_regmap_config = {
.reg_bits = 3,
.val_bits = 12,
@@ -670,6 +684,10 @@ static const struct regmap_config ad7380_regmap_config = {
.reg_write = ad7380_regmap_reg_write,
.max_register = AD7380_REG_ADDR_ALERT_HIGH_TH,
.can_sleep = true,
+ .reg_defaults = ad7380_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(ad7380_reg_defaults),
+ .volatile_table = &ad7380_volatile_regs,
+ .cache_type = REGCACHE_MAPLE,
};

static int ad7380_debugfs_reg_access(struct iio_dev *indio_dev, u32 reg,

--
2.47.1