These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / misc / eeprom / sunxi_sid.c

diff --git a/kernel/drivers/misc/eeprom/sunxi_sid.c b/kernel/drivers/misc/eeprom/sunxi_sid.c
deleted file mode 100644 (file)
index 8385177..0000000
--- a/kernel/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");