Merging upstream version 6.7.7.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

5 files changed, 15 insertions, 267 deletions

diff --git a/drivers/misc/eeprom/Kconfig b/drivers/misc/eeprom/Kconfig
index 2d240bfa81..4e61ac18cc 100644
--- a/drivers/misc/eeprom/Kconfig
+++ b/drivers/misc/eeprom/Kconfig
@@ -46,20 +46,6 @@ config EEPROM_AT25
 	  This driver can also be built as a module.  If so, the module
 	  will be called at25.
 
-config EEPROM_LEGACY
-	tristate "Old I2C EEPROM reader (DEPRECATED)"
-	depends on I2C && SYSFS
-	help
-	  If you say yes here you get read-only access to the EEPROM data
-	  available on modern memory DIMMs and Sony Vaio laptops via I2C. Such
-	  EEPROMs could theoretically be available on other devices as well.
-
-	  This driver is deprecated and will be removed soon, please use the
-	  better at24 driver instead.
-
-	  This driver can also be built as a module.  If so, the module
-	  will be called eeprom.
-
 config EEPROM_MAX6875
 	tristate "Maxim MAX6874/5 power supply supervisor"
 	depends on I2C
diff --git a/drivers/misc/eeprom/Makefile b/drivers/misc/eeprom/Makefile
index a9b4b6579b..65794e526d 100644
--- a/drivers/misc/eeprom/Makefile
+++ b/drivers/misc/eeprom/Makefile
@@ -1,7 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_EEPROM_AT24)	+= at24.o
 obj-$(CONFIG_EEPROM_AT25)	+= at25.o
-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
diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c
index dbbf7db4ff..f61a80597a 100644
--- a/drivers/misc/eeprom/at24.c
+++ b/drivers/misc/eeprom/at24.c
@@ -92,7 +92,7 @@ struct at24_data {
 	 * them for us.
 	 */
 	u8 bank_addr_shift;
-	struct regmap *client_regmaps[];
+	struct regmap *client_regmaps[] __counted_by(num_addresses);
 };
 
 /*
@@ -191,9 +191,13 @@ AT24_CHIP_DATA(at24_data_24c16, 16384 / 8, 0);
 AT24_CHIP_DATA(at24_data_24cs16, 16,
 	AT24_FLAG_SERIAL | AT24_FLAG_READONLY);
 AT24_CHIP_DATA(at24_data_24c32, 32768 / 8, AT24_FLAG_ADDR16);
+/* M24C32-D Additional Write lockable page (M24C32-D order codes) */
+AT24_CHIP_DATA(at24_data_24c32d_wlp, 32, AT24_FLAG_ADDR16);
 AT24_CHIP_DATA(at24_data_24cs32, 16,
 	AT24_FLAG_ADDR16 | AT24_FLAG_SERIAL | AT24_FLAG_READONLY);
 AT24_CHIP_DATA(at24_data_24c64, 65536 / 8, AT24_FLAG_ADDR16);
+/* M24C64-D Additional Write lockable page (M24C64-D order codes) */
+AT24_CHIP_DATA(at24_data_24c64d_wlp, 32, AT24_FLAG_ADDR16);
 AT24_CHIP_DATA(at24_data_24cs64, 16,
 	AT24_FLAG_ADDR16 | AT24_FLAG_SERIAL | AT24_FLAG_READONLY);
 AT24_CHIP_DATA(at24_data_24c128, 131072 / 8, AT24_FLAG_ADDR16);
@@ -222,8 +226,10 @@ static const struct i2c_device_id at24_ids[] = {
 	{ "24c16",	(kernel_ulong_t)&at24_data_24c16 },
 	{ "24cs16",	(kernel_ulong_t)&at24_data_24cs16 },
 	{ "24c32",	(kernel_ulong_t)&at24_data_24c32 },
+	{ "24c32d-wl",	(kernel_ulong_t)&at24_data_24c32d_wlp },
 	{ "24cs32",	(kernel_ulong_t)&at24_data_24cs32 },
 	{ "24c64",	(kernel_ulong_t)&at24_data_24c64 },
+	{ "24c64-wl",	(kernel_ulong_t)&at24_data_24c64d_wlp },
 	{ "24cs64",	(kernel_ulong_t)&at24_data_24cs64 },
 	{ "24c128",	(kernel_ulong_t)&at24_data_24c128 },
 	{ "24c256",	(kernel_ulong_t)&at24_data_24c256 },
@@ -252,8 +258,10 @@ static const struct of_device_id at24_of_match[] = {
 	{ .compatible = "atmel,24c16",		.data = &at24_data_24c16 },
 	{ .compatible = "atmel,24cs16",		.data = &at24_data_24cs16 },
 	{ .compatible = "atmel,24c32",		.data = &at24_data_24c32 },
+	{ .compatible = "atmel,24c32d-wl",	.data = &at24_data_24c32d_wlp },
 	{ .compatible = "atmel,24cs32",		.data = &at24_data_24cs32 },
 	{ .compatible = "atmel,24c64",		.data = &at24_data_24c64 },
+	{ .compatible = "atmel,24c64d-wl",	.data = &at24_data_24c64d_wlp },
 	{ .compatible = "atmel,24cs64",		.data = &at24_data_24cs64 },
 	{ .compatible = "atmel,24c128",		.data = &at24_data_24c128 },
 	{ .compatible = "atmel,24c256",		.data = &at24_data_24c256 },
@@ -509,32 +517,6 @@ static int at24_write(void *priv, unsigned int off, void *val, size_t count)
 	return 0;
 }
 
-static const struct at24_chip_data *at24_get_chip_data(struct device *dev)
-{
-	struct device_node *of_node = dev->of_node;
-	const struct at24_chip_data *cdata;
-	const struct i2c_device_id *id;
-
-	id = i2c_match_id(at24_ids, to_i2c_client(dev));
-
-	/*
-	 * The I2C core allows OF nodes compatibles to match against the
-	 * I2C device ID table as a fallback, so check not only if an OF
-	 * node is present but also if it matches an OF device ID entry.
-	 */
-	if (of_node && of_match_device(at24_of_match, dev))
-		cdata = of_device_get_match_data(dev);
-	else if (id)
-		cdata = (void *)id->driver_data;
-	else
-		cdata = acpi_device_get_match_data(dev);
-
-	if (!cdata)
-		return ERR_PTR(-ENODEV);
-
-	return cdata;
-}
-
 static int at24_make_dummy_client(struct at24_data *at24, unsigned int index,
 				  struct i2c_client *base_client,
 				  struct regmap_config *regmap_config)
@@ -601,9 +583,9 @@ static int at24_probe(struct i2c_client *client)
 	i2c_fn_block = i2c_check_functionality(client->adapter,
 					       I2C_FUNC_SMBUS_WRITE_I2C_BLOCK);
 
-	cdata = at24_get_chip_data(dev);
-	if (IS_ERR(cdata))
-		return PTR_ERR(cdata);
+	cdata = i2c_get_match_data(client);
+	if (!cdata)
+		return -ENODEV;
 
 	err = device_property_read_u32(dev, "pagesize", &page_size);
 	if (err)
diff --git a/drivers/misc/eeprom/eeprom.c b/drivers/misc/eeprom/eeprom.c
deleted file mode 100644
index ccb7c2f7ee..0000000000
--- a/drivers/misc/eeprom/eeprom.c
+++ /dev/null
@@ -1,214 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 1998, 1999  Frodo Looijaard <frodol@dds.nl> and
- *                           Philip Edelbrock <phil@netroedge.com>
- * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
- * Copyright (C) 2003 IBM Corp.
- * Copyright (C) 2004 Jean Delvare <jdelvare@suse.de>
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/device.h>
-#include <linux/capability.h>
-#include <linux/jiffies.h>
-#include <linux/i2c.h>
-#include <linux/mutex.h>
-
-/* Addresses to scan */
-static const unsigned short normal_i2c[] = { 0x50, 0x51, 0x52, 0x53, 0x54,
-					0x55, 0x56, 0x57, I2C_CLIENT_END };
-
-
-/* Size of EEPROM in bytes */
-#define EEPROM_SIZE		256
-
-/* possible types of eeprom devices */
-enum eeprom_nature {
-	UNKNOWN,
-	VAIO,
-};
-
-/* Each client has this additional data */
-struct eeprom_data {
-	struct mutex update_lock;
-	u8 valid;			/* bitfield, bit!=0 if slice is valid */
-	unsigned long last_updated[8];	/* In jiffies, 8 slices */
-	u8 data[EEPROM_SIZE];		/* Register values */
-	enum eeprom_nature nature;
-};
-
-
-static void eeprom_update_client(struct i2c_client *client, u8 slice)
-{
-	struct eeprom_data *data = i2c_get_clientdata(client);
-	int i;
-
-	mutex_lock(&data->update_lock);
-
-	if (!(data->valid & (1 << slice)) ||
-	    time_after(jiffies, data->last_updated[slice] + 300 * HZ)) {
-		dev_dbg(&client->dev, "Starting eeprom update, slice %u\n", slice);
-
-		if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_READ_I2C_BLOCK)) {
-			for (i = slice << 5; i < (slice + 1) << 5; i += 32)
-				if (i2c_smbus_read_i2c_block_data(client, i,
-							32, data->data + i)
-							!= 32)
-					goto exit;
-		} else {
-			for (i = slice << 5; i < (slice + 1) << 5; i += 2) {
-				int word = i2c_smbus_read_word_data(client, i);
-				if (word < 0)
-					goto exit;
-				data->data[i] = word & 0xff;
-				data->data[i + 1] = word >> 8;
-			}
-		}
-		data->last_updated[slice] = jiffies;
-		data->valid |= (1 << slice);
-	}
-exit:
-	mutex_unlock(&data->update_lock);
-}
-
-static ssize_t eeprom_read(struct file *filp, struct kobject *kobj,
-			   struct bin_attribute *bin_attr,
-			   char *buf, loff_t off, size_t count)
-{
-	struct i2c_client *client = kobj_to_i2c_client(kobj);
-	struct eeprom_data *data = i2c_get_clientdata(client);
-	u8 slice;
-
-	/* Only refresh slices which contain requested bytes */
-	for (slice = off >> 5; slice <= (off + count - 1) >> 5; slice++)
-		eeprom_update_client(client, slice);
-
-	/* Hide Vaio private settings to regular users:
-	   - BIOS passwords: bytes 0x00 to 0x0f
-	   - UUID: bytes 0x10 to 0x1f
-	   - Serial number: 0xc0 to 0xdf */
-	if (data->nature == VAIO && !capable(CAP_SYS_ADMIN)) {
-		int i;
-
-		for (i = 0; i < count; i++) {
-			if ((off + i <= 0x1f) ||
-			    (off + i >= 0xc0 && off + i <= 0xdf))
-				buf[i] = 0;
-			else
-				buf[i] = data->data[off + i];
-		}
-	} else {
-		memcpy(buf, &data->data[off], count);
-	}
-
-	return count;
-}
-
-static const struct bin_attribute eeprom_attr = {
-	.attr = {
-		.name = "eeprom",
-		.mode = S_IRUGO,
-	},
-	.size = EEPROM_SIZE,
-	.read = eeprom_read,
-};
-
-/* Return 0 if detection is successful, -ENODEV otherwise */
-static int eeprom_detect(struct i2c_client *client, struct i2c_board_info *info)
-{
-	struct i2c_adapter *adapter = client->adapter;
-
-	/* EDID EEPROMs are often 24C00 EEPROMs, which answer to all
-	   addresses 0x50-0x57, but we only care about 0x50. So decline
-	   attaching to addresses >= 0x51 on DDC buses */
-	if (!(adapter->class & I2C_CLASS_SPD) && client->addr >= 0x51)
-		return -ENODEV;
-
-	/* There are four ways we can read the EEPROM data:
-	   (1) I2C block reads (faster, but unsupported by most adapters)
-	   (2) Word reads (128% overhead)
-	   (3) Consecutive byte reads (88% overhead, unsafe)
-	   (4) Regular byte data reads (265% overhead)
-	   The third and fourth methods are not implemented by this driver
-	   because all known adapters support one of the first two. */
-	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_READ_WORD_DATA)
-	 && !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_READ_I2C_BLOCK))
-		return -ENODEV;
-
-	strscpy(info->type, "eeprom", I2C_NAME_SIZE);
-
-	return 0;
-}
-
-static int eeprom_probe(struct i2c_client *client)
-{
-	struct i2c_adapter *adapter = client->adapter;
-	struct eeprom_data *data;
-
-	data = devm_kzalloc(&client->dev, sizeof(struct eeprom_data),
-			    GFP_KERNEL);
-	if (!data)
-		return -ENOMEM;
-
-	memset(data->data, 0xff, EEPROM_SIZE);
-	i2c_set_clientdata(client, data);
-	mutex_init(&data->update_lock);
-	data->nature = UNKNOWN;
-
-	/* Detect the Vaio nature of EEPROMs.
-	   We use the "PCG-" or "VGN-" prefix as the signature. */
-	if (client->addr == 0x57
-	 && i2c_check_functionality(adapter, I2C_FUNC_SMBUS_READ_BYTE_DATA)) {
-		char name[4];
-
-		name[0] = i2c_smbus_read_byte_data(client, 0x80);
-		name[1] = i2c_smbus_read_byte_data(client, 0x81);
-		name[2] = i2c_smbus_read_byte_data(client, 0x82);
-		name[3] = i2c_smbus_read_byte_data(client, 0x83);
-
-		if (!memcmp(name, "PCG-", 4) || !memcmp(name, "VGN-", 4)) {
-			dev_info(&client->dev, "Vaio EEPROM detected, "
-				 "enabling privacy protection\n");
-			data->nature = VAIO;
-		}
-	}
-
-	/* Let the users know they are using deprecated driver */
-	dev_notice(&client->dev,
-		   "eeprom driver is deprecated, please use at24 instead\n");
-
-	/* create the sysfs eeprom file */
-	return sysfs_create_bin_file(&client->dev.kobj, &eeprom_attr);
-}
-
-static void eeprom_remove(struct i2c_client *client)
-{
-	sysfs_remove_bin_file(&client->dev.kobj, &eeprom_attr);
-}
-
-static const struct i2c_device_id eeprom_id[] = {
-	{ "eeprom", 0 },
-	{ }
-};
-
-static struct i2c_driver eeprom_driver = {
-	.driver = {
-		.name	= "eeprom",
-	},
-	.probe		= eeprom_probe,
-	.remove		= eeprom_remove,
-	.id_table	= eeprom_id,
-
-	.class		= I2C_CLASS_DDC | I2C_CLASS_SPD,
-	.detect		= eeprom_detect,
-	.address_list	= normal_i2c,
-};
-
-module_i2c_driver(eeprom_driver);
-
-MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
-		"Philip Edelbrock <phil@netroedge.com> and "
-		"Greg Kroah-Hartman <greg@kroah.com>");
-MODULE_DESCRIPTION("I2C EEPROM driver");
-MODULE_LICENSE("GPL");
diff --git a/drivers/misc/eeprom/idt_89hpesx.c b/drivers/misc/eeprom/idt_89hpesx.c
index 1d1f30b5c4..d807d08e26 100644
--- a/drivers/misc/eeprom/idt_89hpesx.c
+++ b/drivers/misc/eeprom/idt_89hpesx.c
@@ -905,7 +905,7 @@ static ssize_t idt_dbgfs_csr_write(struct file *filep, const char __user *ubuf,
 {
 	struct idt_89hpesx_dev *pdev = filep->private_data;
 	char *colon_ch, *csraddr_str, *csrval_str;
-	int ret, csraddr_len;
+	int ret;
 	u32 csraddr, csrval;
 	char *buf;
 
@@ -927,21 +927,16 @@ static ssize_t idt_dbgfs_csr_write(struct file *filep, const char __user *ubuf,
 	 * no new CSR value
 	 */
 	if (colon_ch != NULL) {
-		csraddr_len = colon_ch - buf;
-		csraddr_str =
-			kmalloc(csraddr_len + 1, GFP_KERNEL);
+		/* Copy the register address to the substring buffer */
+		csraddr_str = kmemdup_nul(buf, colon_ch - buf, GFP_KERNEL);
 		if (csraddr_str == NULL) {
 			ret = -ENOMEM;
 			goto free_buf;
 		}
-		/* Copy the register address to the substring buffer */
-		strncpy(csraddr_str, buf, csraddr_len);
-		csraddr_str[csraddr_len] = '\0';
 		/* Register value must follow the colon */
 		csrval_str = colon_ch + 1;
 	} else /* if (str_colon == NULL) */ {
 		csraddr_str = (char *)buf; /* Just to shut warning up */
-		csraddr_len = strnlen(csraddr_str, count);
 		csrval_str = NULL;
 	}