Commit c31752b1 authored by Sam Winchenbach's avatar Sam Winchenbach Committed by Jonathan Cameron
Browse files

iio: core: Add support for writing 64 bit attrs 



Prior to this patch it was only possible to read 64 bit integers.

Signed-off-by: default avatarSam Winchenbach <swinchenbach@arka.org>
Link: https://patch.msgid.link/20250328174831.227202-6-sam.winchenbach@framepointer.org


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent d542db70

drivers/iio/industrialio-core.c

+13 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
#include <linux/sched.h>

#include <linux/slab.h>

#include <linux/wait.h>

#include <linux/wordpart.h>



#include <linux/iio/buffer.h>

#include <linux/iio/buffer_impl.h>
@@ -966,8 +967,10 @@ static ssize_t iio_write_channel_info(struct device *dev, 
	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);

	int ret, fract_mult = 100000;

	int integer, fract = 0;

	long long integer64;

	bool is_char = false;

	bool scale_db = false;

	bool is_64bit = false;



	/* Assumes decimal - precision based on number of digits */

	if (!indio_dev->info->write_raw)
@@ -991,6 +994,9 @@ static ssize_t iio_write_channel_info(struct device *dev, 
		case IIO_VAL_CHAR:

			is_char = true;

			break;

		case IIO_VAL_INT_64:

			is_64bit = true;

			break;

		default:

			return -EINVAL;

		}
@@ -1001,6 +1007,13 @@ static ssize_t iio_write_channel_info(struct device *dev, 
		if (sscanf(buf, "%c", &ch) != 1)

			return -EINVAL;

		integer = ch;

	} else if (is_64bit) {

		ret = kstrtoll(buf, 0, &integer64);

		if (ret)

			return ret;



		fract = upper_32_bits(integer64);

		integer = lower_32_bits(integer64);

	} else {

		ret = __iio_str_to_fixpoint(buf, fract_mult, &integer, &fract,

					    scale_db);