From: Amit Sunil Dhamne via B4 Relay <devnull+amitsd.google.com@kernel.org>
To: "Sebastian Reichel" <sre@kernel.org>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"André Draszik" <andre.draszik@linaro.org>,
"Lee Jones" <lee@kernel.org>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Badhri Jagan Sridharan" <badhri@google.com>,
"Heikki Krogerus" <heikki.krogerus@linux.intel.com>,
"Peter Griffin" <peter.griffin@linaro.org>,
"Tudor Ambarus" <tudor.ambarus@linaro.org>,
"Alim Akhtar" <alim.akhtar@samsung.com>,
"Mark Brown" <broonie@kernel.org>,
"Matti Vaittinen" <mazziesaccount@gmail.com>,
"Andrew Morton" <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
devicetree@vger.kernel.org, linux-usb@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org,
RD Babiera <rdbabiera@google.com>, Kyle Tso <kyletso@google.com>,
Amit Sunil Dhamne <amitsd@google.com>
Subject: [PATCH v7 4/6] lib/linear_ranges: Add linear_range_get_selector_high_array
Date: Wed, 18 Feb 2026 21:59:12 +0000 [thread overview]
Message-ID: <20260218-max77759-charger-v7-4-e8d907ce69c5@google.com> (raw)
In-Reply-To: <20260218-max77759-charger-v7-0-e8d907ce69c5@google.com>
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
next prev parent reply other threads:[~2026-02-18 21:59 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-18 21:59 [PATCH v7 0/6] Introduce MAX77759 charger driver Amit Sunil Dhamne via B4 Relay
2026-02-18 21:59 ` [PATCH v7 1/6] dt-bindings: mfd: maxim,max77759: reference power-supply schema and add regulator property Amit Sunil Dhamne via B4 Relay
2026-02-18 21:59 ` [PATCH v7 2/6] dt-bindings: usb: maxim,max33359: Add supply property for vbus Amit Sunil Dhamne via B4 Relay
2026-02-18 21:59 ` [PATCH v7 3/6] mfd: max77759: add register bitmasks and modify irq configs for charger Amit Sunil Dhamne via B4 Relay
2026-02-18 21:59 ` Amit Sunil Dhamne via B4 Relay [this message]
2026-02-24 17:13 ` [PATCH v7 4/6] lib/linear_ranges: Add linear_range_get_selector_high_array Mark Brown
2026-02-18 21:59 ` [PATCH v7 5/6] power: supply: max77759: add charger driver Amit Sunil Dhamne via B4 Relay
2026-02-19 15:52 ` André Draszik
2026-02-19 20:38 ` Amit Sunil Dhamne
2026-02-18 21:59 ` [PATCH v7 6/6] usb: typec: tcpm/tcpci_maxim: deprecate WAR for setting charger mode Amit Sunil Dhamne via B4 Relay
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