From 67eedba39ed1ac29908453647652c02fbbeeca1b Mon Sep 17 00:00:00 2001 From: Michael Hennerich Date: Fri, 11 May 2012 11:36:52 +0200 Subject: [PATCH] iio: core: introduce dB scle: IIO_VAL_INT_PLUS_MICRO_DB Signed-off-by: Michael Hennerich Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/industrialio-core.c | 19 +++++++++++++------ include/linux/iio/types.h | 1 + 2 files changed, 14 insertions(+), 6 deletions(-) diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index b39a587..425cd4c 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -295,26 +295,33 @@ static ssize_t iio_read_channel_info(struct device *dev, struct iio_dev *indio_dev = dev_get_drvdata(dev); struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); int val, val2; + bool scale_db = false; int ret = indio_dev->info->read_raw(indio_dev, this_attr->c, &val, &val2, this_attr->address); if (ret < 0) return ret; - if (ret == IIO_VAL_INT) + switch (ret) { + case IIO_VAL_INT: return sprintf(buf, "%d\n", val); - else if (ret == IIO_VAL_INT_PLUS_MICRO) { + case IIO_VAL_INT_PLUS_MICRO_DB: + scale_db = true; + case IIO_VAL_INT_PLUS_MICRO: if (val2 < 0) - return sprintf(buf, "-%d.%06u\n", val, -val2); + return sprintf(buf, "-%d.%06u%s\n", val, -val2, + scale_db ? " dB" : ""); else - return sprintf(buf, "%d.%06u\n", val, val2); - } else if (ret == IIO_VAL_INT_PLUS_NANO) { + return sprintf(buf, "%d.%06u%s\n", val, val2, + scale_db ? " dB" : ""); + case IIO_VAL_INT_PLUS_NANO: if (val2 < 0) return sprintf(buf, "-%d.%09u\n", val, -val2); else return sprintf(buf, "%d.%09u\n", val, val2); - } else + default: return 0; + } } static ssize_t iio_write_channel_info(struct device *dev, diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h index a471fd5..1b073b1 100644 --- a/include/linux/iio/types.h +++ b/include/linux/iio/types.h @@ -50,5 +50,6 @@ enum iio_modifier { #define IIO_VAL_INT 1 #define IIO_VAL_INT_PLUS_MICRO 2 #define IIO_VAL_INT_PLUS_NANO 3 +#define IIO_VAL_INT_PLUS_MICRO_DB 4 #endif /* _IIO_TYPES_H_ */ -- 2.7.4