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From: Ruslan Babayev <ruslan@babayev.com>
To: mika.westerberg@linux.intel.com, wsa@the-dreams.de,
	linux@armlinux.org.uk, andrew@lunn.ch, f.fainelli@gmail.com,
	hkallweit1@gmail.com, davem@davemloft.net
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-i2c@vger.kernel.org, linux-acpi@vger.kernel.org,
	xe-linux-external@cisco.com
Subject: [net-next,v4 1/2] i2c: acpi: export i2c_acpi_find_adapter_by_handle
Date: Tue, 28 May 2019 16:02:32 -0700
Message-ID: <20190528230233.26772-2-ruslan@babayev.com> (raw)
In-Reply-To: <20190528230233.26772-1-ruslan@babayev.com>

This allows drivers to lookup i2c adapters on ACPI based systems similar to
of_get_i2c_adapter_by_node() with DT based systems.

Signed-off-by: Ruslan Babayev <ruslan@babayev.com>
Cc: xe-linux-external@cisco.com
---
 drivers/i2c/i2c-core-acpi.c | 3 ++-
 include/linux/i2c.h         | 6 ++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c
index 272800692088..964687534754 100644
--- a/drivers/i2c/i2c-core-acpi.c
+++ b/drivers/i2c/i2c-core-acpi.c
@@ -337,7 +337,7 @@ static int i2c_acpi_find_match_device(struct device *dev, void *data)
 	return ACPI_COMPANION(dev) == data;
 }
 
-static struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle)
+struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle)
 {
 	struct device *dev;
 
@@ -345,6 +345,7 @@ static struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle)
 			      i2c_acpi_find_match_adapter);
 	return dev ? i2c_verify_adapter(dev) : NULL;
 }
+EXPORT_SYMBOL_GPL(i2c_acpi_find_adapter_by_handle);
 
 static struct i2c_client *i2c_acpi_find_client_by_adev(struct acpi_device *adev)
 {
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 1308126fc384..e982b8913b73 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -14,6 +14,7 @@
 #ifndef _LINUX_I2C_H
 #define _LINUX_I2C_H
 
+#include <linux/acpi.h>		/* for acpi_handle */
 #include <linux/mod_devicetable.h>
 #include <linux/device.h>	/* for struct device */
 #include <linux/sched.h>	/* for completion */
@@ -981,6 +982,7 @@ bool i2c_acpi_get_i2c_resource(struct acpi_resource *ares,
 u32 i2c_acpi_find_bus_speed(struct device *dev);
 struct i2c_client *i2c_acpi_new_device(struct device *dev, int index,
 				       struct i2c_board_info *info);
+struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle);
 #else
 static inline bool i2c_acpi_get_i2c_resource(struct acpi_resource *ares,
 					     struct acpi_resource_i2c_serialbus **i2c)
@@ -996,6 +998,10 @@ static inline struct i2c_client *i2c_acpi_new_device(struct device *dev,
 {
 	return NULL;
 }
+static inline struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle)
+{
+	return NULL;
+}
 #endif /* CONFIG_ACPI */
 
 #endif /* _LINUX_I2C_H */
-- 
2.19.2


  reply index

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-28 23:02 [net-next,v4 0/2] Enable SFP on ACPI based systems Ruslan Babayev
2019-05-28 23:02 ` Ruslan Babayev [this message]
2019-05-29 15:49   ` [net-next,v4 1/2] i2c: acpi: export i2c_acpi_find_adapter_by_handle Andrew Lunn
2019-06-02 19:58   ` Wolfram Sang
2019-05-28 23:02 ` [net-next,v4 2/2] net: phy: sfp: enable i2c-bus detection on ACPI based systems Ruslan Babayev
2019-05-29  9:51   ` Russell King - ARM Linux admin
2019-05-29 15:49   ` Andrew Lunn
2019-05-29  9:48 ` [net-next,v4 0/2] Enable SFP " Mika Westerberg
2019-05-29 15:51   ` Andrew Lunn
2019-05-31  6:27     ` Mika Westerberg
2019-05-31  6:48       ` Wolfram Sang
2019-05-31 12:05         ` Andrew Lunn
2019-05-31 12:56           ` Wolfram Sang
2019-05-30 18:27 ` David Miller
2019-05-31 12:57   ` Wolfram Sang
2019-05-31 18:22     ` David Miller
2019-05-31 18:33       ` Russell King - ARM Linux admin
2019-06-01 12:47       ` Wolfram Sang

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