iio: health: max30102: Prepare for copying varying number of measurements
Current code assumes always 2 measurements (6 bytes) have to be copied,
prepare for more flexibility
Signed-off-by: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Acked-by: Matt Ranostay <matt.ranostay@konsulko.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
diff --git a/drivers/iio/health/max30102.c b/drivers/iio/health/max30102.c
index da3b100..37ddbad 100644
--- a/drivers/iio/health/max30102.c
+++ b/drivers/iio/health/max30102.c
@@ -58,7 +58,7 @@ enum max3012_led_idx {
#define MAX30102_REG_FIFO_OVR_CTR 0x05
#define MAX30102_REG_FIFO_RD_PTR 0x06
#define MAX30102_REG_FIFO_DATA 0x07
-#define MAX30102_REG_FIFO_DATA_ENTRY_LEN 6
+#define MAX30102_REG_FIFO_DATA_BYTES 3
#define MAX30102_REG_FIFO_CONFIG 0x08
#define MAX30102_REG_FIFO_CONFIG_AVG_4SAMPLES BIT(1)
@@ -198,6 +198,11 @@ static inline int max30102_fifo_count(struct max30102_data *data)
return 0;
}
+#define MAX30102_COPY_DATA(i) \
+ memcpy(&data->processed_buffer[(i)], \
+ &buffer[(i) * MAX30102_REG_FIFO_DATA_BYTES], \
+ MAX30102_REG_FIFO_DATA_BYTES)
+
static int max30102_read_measurement(struct max30102_data *data)
{
int ret;
@@ -205,13 +210,13 @@ static int max30102_read_measurement(struct max30102_data *data)
ret = i2c_smbus_read_i2c_block_data(data->client,
MAX30102_REG_FIFO_DATA,
- MAX30102_REG_FIFO_DATA_ENTRY_LEN,
+ 2 * MAX30102_REG_FIFO_DATA_BYTES,
buffer);
- memcpy(&data->processed_buffer[0], &buffer[0], 3);
- memcpy(&data->processed_buffer[1], &buffer[3], 3);
+ MAX30102_COPY_DATA(0);
+ MAX30102_COPY_DATA(1);
- return (ret == MAX30102_REG_FIFO_DATA_ENTRY_LEN) ? 0 : -EINVAL;
+ return (ret == 2 * MAX30102_REG_FIFO_DATA_BYTES) ? 0 : -EINVAL;
}
static irqreturn_t max30102_interrupt_handler(int irq, void *private)