7 files changed, 7 insertions, 227 deletions

diff --git a/drivers/misc/eeprom/Kconfig b/drivers/misc/eeprom/Kconfig
index 9536852fd..04f2e1fa9 100644
--- a/drivers/misc/eeprom/Kconfig
+++ b/drivers/misc/eeprom/Kconfig
@@ -96,17 +96,4 @@ config EEPROM_DIGSY_MTC_CFG
 
 	  If unsure, say N.
 
-config EEPROM_SUNXI_SID
-	tristate "Allwinner sunxi security ID support"
-	depends on ARCH_SUNXI && SYSFS
-	help
-	  This is a driver for the 'security ID' available on various Allwinner
-	  devices.
-
-	  Due to the potential risks involved with changing e-fuses,
-	  this driver is read-only.
-
-	  This driver can also be built as a module. If so, the module
-	  will be called sunxi_sid.
-
 endmenu
diff --git a/drivers/misc/eeprom/Makefile b/drivers/misc/eeprom/Makefile
index 9507aec95..fc1e81d29 100644
--- a/drivers/misc/eeprom/Makefile
+++ b/drivers/misc/eeprom/Makefile
@@ -4,5 +4,4 @@ obj-$(CONFIG_EEPROM_LEGACY)	+= eeprom.o
 obj-$(CONFIG_EEPROM_MAX6875)	+= max6875.o
 obj-$(CONFIG_EEPROM_93CX6)	+= eeprom_93cx6.o
 obj-$(CONFIG_EEPROM_93XX46)	+= eeprom_93xx46.o
-obj-$(CONFIG_EEPROM_SUNXI_SID)	+= sunxi_sid.o
 obj-$(CONFIG_EEPROM_DIGSY_MTC_CFG) += digsy_mtc_eeprom.o
diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c
index 6ded3dc36..c6cb7f8f3 100644
--- a/drivers/misc/eeprom/at24.c
+++ b/drivers/misc/eeprom/at24.c
@@ -186,19 +186,11 @@ static ssize_t at24_eeprom_read(struct at24_data *at24, char *buf,
 	if (count > io_limit)
 		count = io_limit;
 
-	switch (at24->use_smbus) {
-	case I2C_SMBUS_I2C_BLOCK_DATA:
+	if (at24->use_smbus) {
 		/* Smaller eeproms can work given some SMBus extension calls */
 		if (count > I2C_SMBUS_BLOCK_MAX)
 			count = I2C_SMBUS_BLOCK_MAX;
-		break;
-	case I2C_SMBUS_WORD_DATA:
-		count = 2;
-		break;
-	case I2C_SMBUS_BYTE_DATA:
-		count = 1;
-		break;
-	default:
+	} else {
 		/*
 		 * When we have a better choice than SMBus calls, use a
 		 * combined I2C message. Write address; then read up to
@@ -229,27 +221,10 @@ static ssize_t at24_eeprom_read(struct at24_data *at24, char *buf,
 	timeout = jiffies + msecs_to_jiffies(write_timeout);
 	do {
 		read_time = jiffies;
-		switch (at24->use_smbus) {
-		case I2C_SMBUS_I2C_BLOCK_DATA:
-			status = i2c_smbus_read_i2c_block_data(client, offset,
-					count, buf);
-			break;
-		case I2C_SMBUS_WORD_DATA:
-			status = i2c_smbus_read_word_data(client, offset);
-			if (status >= 0) {
-				buf[0] = status & 0xff;
-				buf[1] = status >> 8;
-				status = count;
-			}
-			break;
-		case I2C_SMBUS_BYTE_DATA:
-			status = i2c_smbus_read_byte_data(client, offset);
-			if (status >= 0) {
-				buf[0] = status;
-				status = count;
-			}
-			break;
-		default:
+		if (at24->use_smbus) {
+			status = i2c_smbus_read_i2c_block_data_or_emulated(client, offset,
+									   count, buf);
+		} else {
 			status = i2c_transfer(client->adapter, msg, 2);
 			if (status == 2)
 				status = count;
@@ -686,7 +661,6 @@ static int at24_remove(struct i2c_client *client)
 static struct i2c_driver at24_driver = {
 	.driver = {
 		.name = "at24",
-		.owner = THIS_MODULE,
 	},
 	.probe = at24_probe,
 	.remove = at24_remove,
diff --git a/drivers/misc/eeprom/eeprom.c b/drivers/misc/eeprom/eeprom.c
index b432873de..7342fd637 100644
--- a/drivers/misc/eeprom/eeprom.c
+++ b/drivers/misc/eeprom/eeprom.c
@@ -88,11 +88,6 @@ static ssize_t eeprom_read(struct file *filp, struct kobject *kobj,
 	struct eeprom_data *data = i2c_get_clientdata(client);
 	u8 slice;
 
-	if (off > EEPROM_SIZE)
-		return 0;
-	if (off + count > EEPROM_SIZE)
-		count = EEPROM_SIZE - off;
-
 	/* Only refresh slices which contain requested bytes */
 	for (slice = off >> 5; slice <= (off + count - 1) >> 5; slice++)
 		eeprom_update_client(client, slice);
diff --git a/drivers/misc/eeprom/eeprom_93xx46.c b/drivers/misc/eeprom/eeprom_93xx46.c
index 9ebeacdb8..a6bd9e3fe 100644
--- a/drivers/misc/eeprom/eeprom_93xx46.c
+++ b/drivers/misc/eeprom/eeprom_93xx46.c
@@ -48,13 +48,6 @@ eeprom_93xx46_bin_read(struct file *filp, struct kobject *kobj,
 	dev = container_of(kobj, struct device, kobj);
 	edev = dev_get_drvdata(dev);
 
-	if (unlikely(off >= edev->bin.size))
-		return 0;
-	if ((off + count) > edev->bin.size)
-		count = edev->bin.size - off;
-	if (unlikely(!count))
-		return count;
-
 	cmd_addr = OP_READ << edev->addrlen;
 
 	if (edev->addrlen == 7) {
@@ -200,13 +193,6 @@ eeprom_93xx46_bin_write(struct file *filp, struct kobject *kobj,
 	dev = container_of(kobj, struct device, kobj);
 	edev = dev_get_drvdata(dev);
 
-	if (unlikely(off >= edev->bin.size))
-		return -EFBIG;
-	if ((off + count) > edev->bin.size)
-		count = edev->bin.size - off;
-	if (unlikely(!count))
-		return count;
-
 	/* only write even number of bytes on 16-bit devices */
 	if (edev->addrlen == 6) {
 		step = 2;
diff --git a/drivers/misc/eeprom/max6875.c b/drivers/misc/eeprom/max6875.c
index 580ff9df5..e4dd93b25 100644
--- a/drivers/misc/eeprom/max6875.c
+++ b/drivers/misc/eeprom/max6875.c
@@ -114,12 +114,6 @@ static ssize_t max6875_read(struct file *filp, struct kobject *kobj,
 	struct max6875_data *data = i2c_get_clientdata(client);
 	int slice, max_slice;
 
-	if (off > USER_EEPROM_SIZE)
-		return 0;
-
-	if (off + count > USER_EEPROM_SIZE)
-		count = USER_EEPROM_SIZE - off;
-
 	/* refresh slices which contain requested bytes */
 	max_slice = (off + count - 1) >> SLICE_BITS;
 	for (slice = (off >> SLICE_BITS); slice <= max_slice; slice++)
@@ -197,6 +191,7 @@ static const struct i2c_device_id max6875_id[] = {
 	{ "max6875", 0 },
 	{ }
 };
+MODULE_DEVICE_TABLE(i2c, max6875_id);
 
 static struct i2c_driver max6875_driver = {
 	.driver = {
diff --git a/drivers/misc/eeprom/sunxi_sid.c b/drivers/misc/eeprom/sunxi_sid.c
deleted file mode 100644
index 8385177ff..000000000
--- a/drivers/misc/eeprom/sunxi_sid.c
+++ /dev/null
@@ -1,156 +0,0 @@
-/*
- * Copyright (c) 2013 Oliver Schinagl <oliver@schinagl.nl>
- * http://www.linux-sunxi.org
- *
- * 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.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * This driver exposes the Allwinner security ID, efuses exported in byte-
- * sized chunks.
- */
-
-#include <linux/compiler.h>
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/export.h>
-#include <linux/fs.h>
-#include <linux/io.h>
-#include <linux/kernel.h>
-#include <linux/kobject.h>
-#include <linux/module.h>
-#include <linux/of_device.h>
-#include <linux/platform_device.h>
-#include <linux/random.h>
-#include <linux/slab.h>
-#include <linux/stat.h>
-#include <linux/sysfs.h>
-#include <linux/types.h>
-
-#define DRV_NAME "sunxi-sid"
-
-struct sunxi_sid_data {
-	void __iomem *reg_base;
-	unsigned int keysize;
-};
-
-/* We read the entire key, due to a 32 bit read alignment requirement. Since we
- * want to return the requested byte, this results in somewhat slower code and
- * uses 4 times more reads as needed but keeps code simpler. Since the SID is
- * only very rarely probed, this is not really an issue.
- */
-static u8 sunxi_sid_read_byte(const struct sunxi_sid_data *sid_data,
-			      const unsigned int offset)
-{
-	u32 sid_key;
-
-	if (offset >= sid_data->keysize)
-		return 0;
-
-	sid_key = ioread32be(sid_data->reg_base + round_down(offset, 4));
-	sid_key >>= (offset % 4) * 8;
-
-	return sid_key; /* Only return the last byte */
-}
-
-static ssize_t sid_read(struct file *fd, struct kobject *kobj,
-			struct bin_attribute *attr, char *buf,
-			loff_t pos, size_t size)
-{
-	struct platform_device *pdev;
-	struct sunxi_sid_data *sid_data;
-	int i;
-
-	pdev = to_platform_device(kobj_to_dev(kobj));
-	sid_data = platform_get_drvdata(pdev);
-
-	if (pos < 0 || pos >= sid_data->keysize)
-		return 0;
-	if (size > sid_data->keysize - pos)
-		size = sid_data->keysize - pos;
-
-	for (i = 0; i < size; i++)
-		buf[i] = sunxi_sid_read_byte(sid_data, pos + i);
-
-	return i;
-}
-
-static struct bin_attribute sid_bin_attr = {
-	.attr = { .name = "eeprom", .mode = S_IRUGO, },
-	.read = sid_read,
-};
-
-static int sunxi_sid_remove(struct platform_device *pdev)
-{
-	device_remove_bin_file(&pdev->dev, &sid_bin_attr);
-	dev_dbg(&pdev->dev, "driver unloaded\n");
-
-	return 0;
-}
-
-static const struct of_device_id sunxi_sid_of_match[] = {
-	{ .compatible = "allwinner,sun4i-a10-sid", .data = (void *)16},
-	{ .compatible = "allwinner,sun7i-a20-sid", .data = (void *)512},
-	{/* sentinel */},
-};
-MODULE_DEVICE_TABLE(of, sunxi_sid_of_match);
-
-static int sunxi_sid_probe(struct platform_device *pdev)
-{
-	struct sunxi_sid_data *sid_data;
-	struct resource *res;
-	const struct of_device_id *of_dev_id;
-	u8 *entropy;
-	unsigned int i;
-
-	sid_data = devm_kzalloc(&pdev->dev, sizeof(struct sunxi_sid_data),
-				GFP_KERNEL);
-	if (!sid_data)
-		return -ENOMEM;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	sid_data->reg_base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(sid_data->reg_base))
-		return PTR_ERR(sid_data->reg_base);
-
-	of_dev_id = of_match_device(sunxi_sid_of_match, &pdev->dev);
-	if (!of_dev_id)
-		return -ENODEV;
-	sid_data->keysize = (int)of_dev_id->data;
-
-	platform_set_drvdata(pdev, sid_data);
-
-	sid_bin_attr.size = sid_data->keysize;
-	if (device_create_bin_file(&pdev->dev, &sid_bin_attr))
-		return -ENODEV;
-
-	entropy = kzalloc(sizeof(u8) * sid_data->keysize, GFP_KERNEL);
-	for (i = 0; i < sid_data->keysize; i++)
-		entropy[i] = sunxi_sid_read_byte(sid_data, i);
-	add_device_randomness(entropy, sid_data->keysize);
-	kfree(entropy);
-
-	dev_dbg(&pdev->dev, "loaded\n");
-
-	return 0;
-}
-
-static struct platform_driver sunxi_sid_driver = {
-	.probe = sunxi_sid_probe,
-	.remove = sunxi_sid_remove,
-	.driver = {
-		.name = DRV_NAME,
-		.of_match_table = sunxi_sid_of_match,
-	},
-};
-module_platform_driver(sunxi_sid_driver);
-
-MODULE_AUTHOR("Oliver Schinagl <oliver@schinagl.nl>");
-MODULE_DESCRIPTION("Allwinner sunxi security id driver");
-MODULE_LICENSE("GPL");