From: Jianqun Xu <jay.xu@rock-chips.com>
To: heiko@sntech.de, linus.walleij@linaro.org,
andriy.shevchenko@linux.intel.com
Cc: brgl@bgdev.pl, linux-gpio@vger.kernel.org,
linux-rockchip@lists.infradead.org,
Hans de Goede <hdegoede@redhat.com>
Subject: [PATCH 5/6] ACPI: utils: Add acpi_dev_uid_to_integer() helper to get _UID as integer
Date: Fri, 9 Sep 2022 17:05:57 +0800 [thread overview]
Message-ID: <20220909090558.3609190-6-jay.xu@rock-chips.com> (raw)
In-Reply-To: <20220909090558.3609190-1-jay.xu@rock-chips.com>
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Some users interpret _UID only as integer and for them it's easier to
have an integer representation of _UID. Add respective helper for that.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
---
drivers/acpi/utils.c | 24 ++++++++++++++++++++++++
include/acpi/acpi_bus.h | 1 +
include/linux/acpi.h | 5 +++++
3 files changed, 30 insertions(+)
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index 5a7b8065e77f..febf9b8da3a0 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -793,6 +793,30 @@ bool acpi_dev_hid_uid_match(struct acpi_device *adev,
}
EXPORT_SYMBOL(acpi_dev_hid_uid_match);
+/**
+ * acpi_dev_uid_to_integer - treat ACPI device _UID as integer
+ * @adev: ACPI device to get _UID from
+ * @integer: output buffer for integer
+ *
+ * Considers _UID as integer and converts it to @integer.
+ *
+ * Returns 0 on success, or negative error code otherwise.
+ */
+int acpi_dev_uid_to_integer(struct acpi_device *adev, u64 *integer)
+{
+ const char *uid;
+
+ if (!adev)
+ return -ENODEV;
+
+ uid = acpi_device_uid(adev);
+ if (!uid)
+ return -ENODATA;
+
+ return kstrtou64(uid, 0, integer);
+}
+EXPORT_SYMBOL(acpi_dev_uid_to_integer);
+
/**
* acpi_dev_found - Detect presence of a given ACPI device in the namespace.
* @hid: Hardware ID of the device.
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index e7d27373ff71..bd0db916f330 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -733,6 +733,7 @@ static inline bool acpi_device_can_poweroff(struct acpi_device *adev)
}
bool acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const char *uid2);
+int acpi_dev_uid_to_integer(struct acpi_device *adev, u64 *integer);
void acpi_dev_clear_dependencies(struct acpi_device *supplier);
bool acpi_dev_ready_for_enumeration(const struct acpi_device *device);
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 6f64b2f3dc54..9434db02cb60 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -798,6 +798,11 @@ acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const char *u
return false;
}
+static inline int acpi_dev_uid_to_integer(struct acpi_device *adev, u64 *integer)
+{
+ return -ENODEV;
+}
+
static inline struct acpi_device *
acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv)
{
--
2.25.1
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next prev parent reply other threads:[~2022-09-09 9:06 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-09 9:05 [PATCH v5 0/6] gpio: rockchip: support acpi Jianqun Xu
2022-09-09 9:05 ` [PATCH 1/6] ARM: dts: rockchip: add gpio alias for gpio dt nodes Jianqun Xu
2022-09-09 10:14 ` jay.xu
2022-09-10 21:09 ` kernel test robot
2022-09-09 9:05 ` [PATCH 2/6] ARM: dts: rockchip: add 'clock-names' " Jianqun Xu
2022-09-09 9:05 ` [PATCH 3/6] arm64: dts: rockchip: add gpio alias " Jianqun Xu
2022-09-09 9:05 ` [PATCH 4/6] arm64: dts: rockchip: add 'clock-names' " Jianqun Xu
2022-09-09 9:05 ` Jianqun Xu [this message]
2022-09-09 9:05 ` [PATCH 6/6] gpio: rockchip: support acpi Jianqun Xu
2022-09-09 10:31 ` Andy Shevchenko
2022-09-13 1:07 ` jay.xu
2022-09-09 11:17 ` Johan Jonker
2022-09-13 1:12 ` jay.xu
2022-09-13 7:55 ` Johan Jonker
2022-09-13 1:14 ` jay.xu
2022-09-10 10:20 ` kernel test robot
2022-09-10 10:52 ` kernel test robot
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