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Message-Id: <20210311062011.8054-11-calvin.johnson@oss.nxp.com>
Date: Thu, 11 Mar 2021 11:50:05 +0530
From: Calvin Johnson <calvin.johnson@....nxp.com>
To: Grant Likely <grant.likely@....com>,
"Rafael J . Wysocki" <rafael@...nel.org>,
Jeremy Linton <jeremy.linton@....com>,
Andrew Lunn <andrew@...n.ch>,
Andy Shevchenko <andy.shevchenko@...il.com>,
Florian Fainelli <f.fainelli@...il.com>,
Russell King - ARM Linux admin <linux@...linux.org.uk>,
Cristi Sovaiala <cristian.sovaiala@....com>,
Florin Laurentiu Chiculita <florinlaurentiu.chiculita@....com>,
Ioana Ciornei <ioana.ciornei@....com>,
Madalin Bucur <madalin.bucur@....nxp.com>,
Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
Marcin Wojtas <mw@...ihalf.com>,
Pieter Jansen Van Vuuren <pieter.jansenvv@...boosystems.io>,
Jon <jon@...id-run.com>, Saravana Kannan <saravanak@...gle.com>,
Randy Dunlap <rdunlap@...radead.org>
Cc: linux-arm-kernel@...ts.infradead.org,
Diana Madalina Craciun <diana.craciun@....com>,
linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
linux.cj@...il.com, netdev@...r.kernel.org,
Laurentiu Tudor <laurentiu.tudor@....com>,
Calvin Johnson <calvin.johnson@....nxp.com>,
Len Brown <lenb@...nel.org>,
"Rafael J. Wysocki" <rjw@...ysocki.net>
Subject: [net-next PATCH v7 10/16] ACPI: utils: Introduce acpi_get_local_address()
Introduce a wrapper around the _ADR evaluation.
Signed-off-by: Calvin Johnson <calvin.johnson@....nxp.com>
---
Changes in v7: None
Changes in v6: None
Changes in v5:
- Replace fwnode_get_id() with acpi_get_local_address()
Changes in v4:
- Improve code structure to handle all cases
Changes in v3:
- Modified to retrieve reg property value for ACPI as well
- Resolved compilation issue with CONFIG_ACPI = n
- Added more info into documentation
Changes in v2: None
drivers/acpi/utils.c | 14 ++++++++++++++
include/linux/acpi.h | 7 +++++++
2 files changed, 21 insertions(+)
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index 682edd913b3b..41fe380a09a7 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -277,6 +277,20 @@ acpi_evaluate_integer(acpi_handle handle,
EXPORT_SYMBOL(acpi_evaluate_integer);
+int acpi_get_local_address(acpi_handle handle, u32 *addr)
+{
+ unsigned long long adr;
+ acpi_status status;
+
+ status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr);
+ if (ACPI_FAILURE(status))
+ return -ENODATA;
+
+ *addr = (u32)adr;
+ return 0;
+}
+EXPORT_SYMBOL(acpi_get_local_address);
+
acpi_status
acpi_evaluate_reference(acpi_handle handle,
acpi_string pathname,
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index fcdaab723916..700f9fc303ab 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -706,6 +706,8 @@ static inline u64 acpi_arch_get_root_pointer(void)
}
#endif
+int acpi_get_local_address(acpi_handle handle, u32 *addr);
+
#else /* !CONFIG_ACPI */
#define acpi_disabled 1
@@ -953,6 +955,11 @@ static inline struct acpi_device *acpi_resource_consumer(struct resource *res)
return NULL;
}
+static inline int acpi_get_local_address(acpi_handle handle, u32 *addr)
+{
+ return -ENODEV;
+}
+
#endif /* !CONFIG_ACPI */
#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
--
2.17.1
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