[PATCH v7 4/6] lib/linear_ranges: Add linear_range_get_selector_high_array
From: Amit Sunil Dhamne via B4 Relay <devnull+amitsd.google.com@kernel.org>
Date: 2026-02-18 21:59:23
Also in:
b4-sent, linux-devicetree, linux-pm, linux-samsung-soc, linux-usb, lkml
Subsystem:
library code, linear ranges helpers, the rest · Maintainers:
Andrew Morton, Mark Brown, Linus Torvalds
From: Amit Sunil Dhamne <amitsd@google.com> Add a helper function to find the selector for a given value in a linear range array. The selector should be such that the value it represents should be higher or equal to the given value. Signed-off-by: Amit Sunil Dhamne <amitsd@google.com> Reviewed-by: Matti Vaittinen <mazziesaccount@gmail.com> --- include/linux/linear_range.h | 3 +++ lib/linear_ranges.c | 36 ++++++++++++++++++++++++++++++++++++ 2 files changed, 39 insertions(+)
diff --git a/include/linux/linear_range.h b/include/linux/linear_range.h
index 2e4f4c3539c075a6caa69f6ae750a556f41fce5d..0f3037f1a94f58667ca7c5200dfda78afafe0cfd 100644
--- a/include/linux/linear_range.h
+++ b/include/linux/linear_range.h@@ -57,5 +57,8 @@ void linear_range_get_selector_within(const struct linear_range *r, int linear_range_get_selector_low_array(const struct linear_range *r, int ranges, unsigned int val, unsigned int *selector, bool *found); +int linear_range_get_selector_high_array(const struct linear_range *r, + int ranges, unsigned int val, + unsigned int *selector, bool *found); #endif
diff --git a/lib/linear_ranges.c b/lib/linear_ranges.c
index a1a7dfa881def894cc8cce8368cb6e9c21dcd6b1..c85583678f6b52a494f8c321ce2d307bdb6845ce 100644
--- a/lib/linear_ranges.c
+++ b/lib/linear_ranges.c@@ -241,6 +241,42 @@ int linear_range_get_selector_high(const struct linear_range *r, } EXPORT_SYMBOL_GPL(linear_range_get_selector_high); +/** + * linear_range_get_selector_high_array - return linear range selector for value + * @r: pointer to array of linear ranges where selector is looked from + * @ranges: amount of ranges to scan from array + * @val: value for which the selector is searched + * @selector: address where found selector value is updated + * @found: flag to indicate that given value was in the range + * + * Scan array of ranges for selector for which range value matches given + * input value. Value is matching if it is equal or higher than given value + * If given value is found to be in a range scanning is stopped and @found is + * set true. If a range with values greater than given value is found + * but the range min is being greater than given value, then the range's + * lowest selector is updated to @selector and scanning is stopped. + * + * Return: 0 on success, -EINVAL if range array is invalid or does not contain + * range with a value greater or equal to given value + */ +int linear_range_get_selector_high_array(const struct linear_range *r, + int ranges, unsigned int val, + unsigned int *selector, bool *found) +{ + int i; + int ret; + + for (i = 0; i < ranges; i++) { + ret = linear_range_get_selector_high(&r[i], val, selector, + found); + if (!ret) + return 0; + } + + return -EINVAL; +} +EXPORT_SYMBOL_GPL(linear_range_get_selector_high_array); + /** * linear_range_get_selector_within - return linear range selector for value * @r: pointer to linear range where selector is looked from
--
2.53.0.371.g1d285c8824-goog