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Date: Fri, 5 Aug 2011 16:24:27 -0500
From: Rob Herring <robherring2@...il.com>
To: Grant Likely <grant.likely@...retlab.ca>
Cc: linux-kernel@...r.kernel.org, linux-i2c@...r.kernel.org,
Rob Herring <rob.herring@...xeda.com>,
Jean Delvare <khali@...ux-fr.org>,
Ben Dooks <ben-linux@...ff.org>
Subject: [PATCH 2/3] i2c: move OF i2c related functions into i2c core
From: Rob Herring <rob.herring@...xeda.com>
This simplifies i2c drivers by removing calls to of_i2c_register_devices
and resolves a module circular dependency between i2c-core and of_i2c.
Signed-off-by: Rob Herring <rob.herring@...xeda.com>
Cc: Grant Likely <grant.likely@...retlab.ca>
Cc: Jean Delvare <khali@...ux-fr.org>
Cc: Ben Dooks <ben-linux@...ff.org>
Cc: linux-i2c@...r.kernel.org
---
arch/powerpc/platforms/44x/warp.c | 1 -
drivers/i2c/i2c-core.c | 85 +++++++++++++++++++++++++++++++-
drivers/of/Makefile | 1 -
drivers/of/of_i2c.c | 97 -------------------------------------
include/linux/i2c.h | 4 ++
include/linux/of_i2c.h | 30 -----------
6 files changed, 87 insertions(+), 131 deletions(-)
delete mode 100644 drivers/of/of_i2c.c
delete mode 100644 include/linux/of_i2c.h
diff --git a/arch/powerpc/platforms/44x/warp.c b/arch/powerpc/platforms/44x/warp.c
index 8f77139..9327ccf 100644
--- a/arch/powerpc/platforms/44x/warp.c
+++ b/arch/powerpc/platforms/44x/warp.c
@@ -16,7 +16,6 @@
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/of_gpio.h>
-#include <linux/of_i2c.h>
#include <linux/slab.h>
#include <asm/machdep.h>
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 011e195..478c7f2 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -22,7 +22,10 @@
SMBus 2.0 support by Mark Studebaker <mdsxyz123@...oo.com> and
Jean Delvare <khali@...ux-fr.org>
Mux support by Rodolfo Giometti <giometti@...eenne.com> and
- Michael Lawnick <michael.lawnick.ext@....com> */
+ Michael Lawnick <michael.lawnick.ext@....com>
+ OF support by Jochen Friedrich <jochen@...am.de> and
+ Jon Smirl <jonsmirl@...il.com>
+ */
#include <linux/module.h>
#include <linux/kernel.h>
@@ -32,7 +35,6 @@
#include <linux/init.h>
#include <linux/idr.h>
#include <linux/mutex.h>
-#include <linux/of_i2c.h>
#include <linux/of_device.h>
#include <linux/completion.h>
#include <linux/hardirq.h>
@@ -790,6 +792,85 @@ static void i2c_scan_static_board_info(struct i2c_adapter *adapter)
up_read(&__i2c_board_lock);
}
+#ifdef CONFIG_OF_I2C
+static void of_i2c_register_devices(struct i2c_adapter *adap)
+{
+ void *result;
+ struct device_node *node;
+
+ /* Only register child devices if the adapter has a node pointer set */
+ if (!adap->dev.of_node)
+ return;
+
+ dev_dbg(&adap->dev, "of_i2c: walking child nodes\n");
+
+ for_each_child_of_node(adap->dev.of_node, node) {
+ struct i2c_board_info info = {};
+ struct dev_archdata dev_ad = {};
+ const __be32 *addr;
+ int len;
+
+ dev_dbg(&adap->dev, "of_i2c: register %s\n", node->full_name);
+
+ if (of_modalias_node(node, info.type, sizeof(info.type)) < 0) {
+ dev_err(&adap->dev, "of_i2c: modalias failure on %s\n",
+ node->full_name);
+ continue;
+ }
+
+ addr = of_get_property(node, "reg", &len);
+ if (!addr || (len < sizeof(int))) {
+ dev_err(&adap->dev, "of_i2c: invalid reg on %s\n",
+ node->full_name);
+ continue;
+ }
+
+ info.addr = be32_to_cpup(addr);
+ if (info.addr > (1 << 10) - 1) {
+ dev_err(&adap->dev, "of_i2c: invalid addr=%x on %s\n",
+ info.addr, node->full_name);
+ continue;
+ }
+
+ info.irq = irq_of_parse_and_map(node, 0);
+ info.of_node = of_node_get(node);
+ info.archdata = &dev_ad;
+
+ request_module("%s%s", I2C_MODULE_PREFIX, info.type);
+
+ result = i2c_new_device(adap, &info);
+ if (result == NULL) {
+ dev_err(&adap->dev, "of_i2c: Failure registering %s\n",
+ node->full_name);
+ of_node_put(node);
+ irq_dispose_mapping(info.irq);
+ continue;
+ }
+ }
+}
+
+static int of_dev_node_match(struct device *dev, void *data)
+{
+ return dev->of_node == data;
+}
+
+/* must call put_device() when done with returned i2c_client device */
+struct i2c_client *of_find_i2c_device_by_node(struct device_node *node)
+{
+ struct device *dev;
+
+ dev = bus_find_device(&i2c_bus_type, NULL, node,
+ of_dev_node_match);
+ if (!dev)
+ return NULL;
+
+ return to_i2c_client(dev);
+}
+EXPORT_SYMBOL(of_find_i2c_device_by_node);
+#else
+static void of_i2c_register_devices(struct i2c_adapter *adap) {}
+#endif
+
static int i2c_do_add_adapter(struct i2c_driver *driver,
struct i2c_adapter *adap)
{
diff --git a/drivers/of/Makefile b/drivers/of/Makefile
index dccb117..faa007c 100644
--- a/drivers/of/Makefile
+++ b/drivers/of/Makefile
@@ -5,7 +5,6 @@ obj-$(CONFIG_OF_ADDRESS) += address.o
obj-$(CONFIG_OF_IRQ) += irq.o
obj-$(CONFIG_OF_DEVICE) += device.o platform.o
obj-$(CONFIG_OF_GPIO) += gpio.o
-obj-$(CONFIG_OF_I2C) += of_i2c.o
obj-$(CONFIG_OF_NET) += of_net.o
obj-$(CONFIG_OF_SPI) += of_spi.o
obj-$(CONFIG_OF_MDIO) += of_mdio.o
diff --git a/drivers/of/of_i2c.c b/drivers/of/of_i2c.c
deleted file mode 100644
index f37fbeb..0000000
--- a/drivers/of/of_i2c.c
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * OF helpers for the I2C API
- *
- * Copyright (c) 2008 Jochen Friedrich <jochen@...am.de>
- *
- * Based on a previous patch from Jon Smirl <jonsmirl@...il.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/i2c.h>
-#include <linux/irq.h>
-#include <linux/of.h>
-#include <linux/of_i2c.h>
-#include <linux/of_irq.h>
-#include <linux/module.h>
-
-void of_i2c_register_devices(struct i2c_adapter *adap)
-{
- void *result;
- struct device_node *node;
-
- /* Only register child devices if the adapter has a node pointer set */
- if (!adap->dev.of_node)
- return;
-
- dev_dbg(&adap->dev, "of_i2c: walking child nodes\n");
-
- for_each_child_of_node(adap->dev.of_node, node) {
- struct i2c_board_info info = {};
- struct dev_archdata dev_ad = {};
- const __be32 *addr;
- int len;
-
- dev_dbg(&adap->dev, "of_i2c: register %s\n", node->full_name);
-
- if (of_modalias_node(node, info.type, sizeof(info.type)) < 0) {
- dev_err(&adap->dev, "of_i2c: modalias failure on %s\n",
- node->full_name);
- continue;
- }
-
- addr = of_get_property(node, "reg", &len);
- if (!addr || (len < sizeof(int))) {
- dev_err(&adap->dev, "of_i2c: invalid reg on %s\n",
- node->full_name);
- continue;
- }
-
- info.addr = be32_to_cpup(addr);
- if (info.addr > (1 << 10) - 1) {
- dev_err(&adap->dev, "of_i2c: invalid addr=%x on %s\n",
- info.addr, node->full_name);
- continue;
- }
-
- info.irq = irq_of_parse_and_map(node, 0);
- info.of_node = of_node_get(node);
- info.archdata = &dev_ad;
-
- request_module("%s%s", I2C_MODULE_PREFIX, info.type);
-
- result = i2c_new_device(adap, &info);
- if (result == NULL) {
- dev_err(&adap->dev, "of_i2c: Failure registering %s\n",
- node->full_name);
- of_node_put(node);
- irq_dispose_mapping(info.irq);
- continue;
- }
- }
-}
-EXPORT_SYMBOL(of_i2c_register_devices);
-
-static int of_dev_node_match(struct device *dev, void *data)
-{
- return dev->of_node == data;
-}
-
-/* must call put_device() when done with returned i2c_client device */
-struct i2c_client *of_find_i2c_device_by_node(struct device_node *node)
-{
- struct device *dev;
-
- dev = bus_find_device(&i2c_bus_type, NULL, node,
- of_dev_node_match);
- if (!dev)
- return NULL;
-
- return to_i2c_client(dev);
-}
-EXPORT_SYMBOL(of_find_i2c_device_by_node);
-
-MODULE_LICENSE("GPL");
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index a6c652e..830397b 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -468,6 +468,10 @@ static inline int i2c_adapter_id(struct i2c_adapter *adap)
{
return adap->nr;
}
+
+/* must call put_device() when done with returned i2c_client device */
+extern struct i2c_client *of_find_i2c_device_by_node(struct device_node *node);
+
#endif /* I2C */
#endif /* __KERNEL__ */
diff --git a/include/linux/of_i2c.h b/include/linux/of_i2c.h
deleted file mode 100644
index 0efe8d4..0000000
--- a/include/linux/of_i2c.h
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * Generic I2C API implementation for PowerPC.
- *
- * Copyright (c) 2008 Jochen Friedrich <jochen@...am.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef __LINUX_OF_I2C_H
-#define __LINUX_OF_I2C_H
-
-#if defined(CONFIG_OF_I2C) || defined(CONFIG_OF_I2C_MODULE)
-#include <linux/i2c.h>
-
-extern void of_i2c_register_devices(struct i2c_adapter *adap);
-
-/* must call put_device() when done with returned i2c_client device */
-extern struct i2c_client *of_find_i2c_device_by_node(struct device_node *node);
-
-#else
-static inline void of_i2c_register_devices(struct i2c_adapter *adap)
-{
- return;
-}
-#endif /* CONFIG_OF_I2C */
-
-#endif /* __LINUX_OF_I2C_H */
--
1.7.4.1
--
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