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-rw-r--r--drivers/of/Kconfig6
-rw-r--r--drivers/of/Makefile1
-rw-r--r--drivers/of/base.c4
-rw-r--r--drivers/of/fdt.c12
-rw-r--r--drivers/of/of_reserved_mem.c173
-rw-r--r--drivers/of/platform.c4
6 files changed, 1 insertions, 199 deletions
diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
index 9d2009a9004d..78cc76053328 100644
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -74,10 +74,4 @@ config OF_MTD
depends on MTD
def_bool y
-config OF_RESERVED_MEM
- depends on OF_FLATTREE && (DMA_CMA || (HAVE_GENERIC_DMA_COHERENT && HAVE_MEMBLOCK))
- def_bool y
- help
- Initialization code for DMA reserved memory
-
endmenu # OF
diff --git a/drivers/of/Makefile b/drivers/of/Makefile
index ed9660adad77..efd05102c405 100644
--- a/drivers/of/Makefile
+++ b/drivers/of/Makefile
@@ -9,4 +9,3 @@ obj-$(CONFIG_OF_MDIO) += of_mdio.o
obj-$(CONFIG_OF_PCI) += of_pci.o
obj-$(CONFIG_OF_PCI_IRQ) += of_pci_irq.o
obj-$(CONFIG_OF_MTD) += of_mtd.o
-obj-$(CONFIG_OF_RESERVED_MEM) += of_reserved_mem.o
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 865d3f66c86b..7d4c70f859e3 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -303,10 +303,8 @@ struct device_node *of_get_cpu_node(int cpu, unsigned int *thread)
struct device_node *cpun, *cpus;
cpus = of_find_node_by_path("/cpus");
- if (!cpus) {
- pr_warn("Missing cpus node, bailing out\n");
+ if (!cpus)
return NULL;
- }
for_each_child_of_node(cpus, cpun) {
if (of_node_cmp(cpun->type, "cpu"))
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 229dd9d69e18..a4fa9ad31b8f 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -18,7 +18,6 @@
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/slab.h>
-#include <linux/random.h>
#include <asm/setup.h> /* for COMMAND_LINE_SIZE */
#ifdef CONFIG_PPC
@@ -803,14 +802,3 @@ void __init unflatten_device_tree(void)
}
#endif /* CONFIG_OF_EARLY_FLATTREE */
-
-/* Feed entire flattened device tree into the random pool */
-static int __init add_fdt_randomness(void)
-{
- if (initial_boot_params)
- add_device_randomness(initial_boot_params,
- be32_to_cpu(initial_boot_params->totalsize));
-
- return 0;
-}
-core_initcall(add_fdt_randomness);
diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
deleted file mode 100644
index 0fe40c7d6904..000000000000
--- a/drivers/of/of_reserved_mem.c
+++ /dev/null
@@ -1,173 +0,0 @@
-/*
- * Device tree based initialization code for reserved memory.
- *
- * Copyright (c) 2013 Samsung Electronics Co., Ltd.
- * http://www.samsung.com
- * Author: Marek Szyprowski <m.szyprowski@samsung.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 optional) any later version of the license.
- */
-
-#include <linux/memblock.h>
-#include <linux/err.h>
-#include <linux/of.h>
-#include <linux/of_fdt.h>
-#include <linux/of_platform.h>
-#include <linux/mm.h>
-#include <linux/sizes.h>
-#include <linux/mm_types.h>
-#include <linux/dma-contiguous.h>
-#include <linux/dma-mapping.h>
-#include <linux/of_reserved_mem.h>
-
-#define MAX_RESERVED_REGIONS 16
-struct reserved_mem {
- phys_addr_t base;
- unsigned long size;
- struct cma *cma;
- char name[32];
-};
-static struct reserved_mem reserved_mem[MAX_RESERVED_REGIONS];
-static int reserved_mem_count;
-
-static int __init fdt_scan_reserved_mem(unsigned long node, const char *uname,
- int depth, void *data)
-{
- struct reserved_mem *rmem = &reserved_mem[reserved_mem_count];
- phys_addr_t base, size;
- int is_cma, is_reserved;
- unsigned long len;
- const char *status;
- __be32 *prop;
-
- is_cma = IS_ENABLED(CONFIG_DMA_CMA) &&
- of_flat_dt_is_compatible(node, "linux,contiguous-memory-region");
- is_reserved = of_flat_dt_is_compatible(node, "reserved-memory-region");
-
- if (!is_reserved && !is_cma) {
- /* ignore node and scan next one */
- return 0;
- }
-
- status = of_get_flat_dt_prop(node, "status", &len);
- if (status && strcmp(status, "okay") != 0) {
- /* ignore disabled node nad scan next one */
- return 0;
- }
-
- prop = of_get_flat_dt_prop(node, "reg", &len);
- if (!prop || (len < (dt_root_size_cells + dt_root_addr_cells) *
- sizeof(__be32))) {
- pr_err("Reserved mem: node %s, incorrect \"reg\" property\n",
- uname);
- /* ignore node and scan next one */
- return 0;
- }
- base = dt_mem_next_cell(dt_root_addr_cells, &prop);
- size = dt_mem_next_cell(dt_root_size_cells, &prop);
-
- if (!size) {
- /* ignore node and scan next one */
- return 0;
- }
-
- pr_info("Reserved mem: found %s, memory base %lx, size %ld MiB\n",
- uname, (unsigned long)base, (unsigned long)size / SZ_1M);
-
- if (reserved_mem_count == ARRAY_SIZE(reserved_mem))
- return -ENOSPC;
-
- rmem->base = base;
- rmem->size = size;
- strlcpy(rmem->name, uname, sizeof(rmem->name));
-
- if (is_cma) {
- struct cma *cma;
- if (dma_contiguous_reserve_area(size, base, 0, &cma) == 0) {
- rmem->cma = cma;
- reserved_mem_count++;
- if (of_get_flat_dt_prop(node,
- "linux,default-contiguous-region",
- NULL))
- dma_contiguous_set_default(cma);
- }
- } else if (is_reserved) {
- if (memblock_remove(base, size) == 0)
- reserved_mem_count++;
- else
- pr_err("Failed to reserve memory for %s\n", uname);
- }
-
- return 0;
-}
-
-static struct reserved_mem *get_dma_memory_region(struct device *dev)
-{
- struct device_node *node;
- const char *name;
- int i;
-
- node = of_parse_phandle(dev->of_node, "memory-region", 0);
- if (!node)
- return NULL;
-
- name = kbasename(node->full_name);
- for (i = 0; i < reserved_mem_count; i++)
- if (strcmp(name, reserved_mem[i].name) == 0)
- return &reserved_mem[i];
- return NULL;
-}
-
-/**
- * of_reserved_mem_device_init() - assign reserved memory region to given device
- *
- * This function assign memory region pointed by "memory-region" device tree
- * property to the given device.
- */
-void of_reserved_mem_device_init(struct device *dev)
-{
- struct reserved_mem *region = get_dma_memory_region(dev);
- if (!region)
- return;
-
- if (region->cma) {
- dev_set_cma_area(dev, region->cma);
- pr_info("Assigned CMA %s to %s device\n", region->name,
- dev_name(dev));
- } else {
- if (dma_declare_coherent_memory(dev, region->base, region->base,
- region->size, DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE) != 0)
- pr_info("Declared reserved memory %s to %s device\n",
- region->name, dev_name(dev));
- }
-}
-
-/**
- * of_reserved_mem_device_release() - release reserved memory device structures
- *
- * This function releases structures allocated for memory region handling for
- * the given device.
- */
-void of_reserved_mem_device_release(struct device *dev)
-{
- struct reserved_mem *region = get_dma_memory_region(dev);
- if (!region && !region->cma)
- dma_release_declared_memory(dev);
-}
-
-/**
- * early_init_dt_scan_reserved_mem() - create reserved memory regions
- *
- * This function grabs memory from early allocator for device exclusive use
- * defined in device tree structures. It should be called by arch specific code
- * once the early allocator (memblock) has been activated and all other
- * subsystems have already allocated/reserved memory.
- */
-void __init early_init_dt_scan_reserved_mem(void)
-{
- of_scan_flat_dt_by_path("/memory/reserved-memory",
- fdt_scan_reserved_mem, NULL);
-}
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 9b439ac63d8e..f6dcde220821 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -21,7 +21,6 @@
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
-#include <linux/of_reserved_mem.h>
#include <linux/platform_device.h>
const struct of_device_id of_default_bus_match_table[] = {
@@ -219,8 +218,6 @@ static struct platform_device *of_platform_device_create_pdata(
dev->dev.bus = &platform_bus_type;
dev->dev.platform_data = platform_data;
- of_reserved_mem_device_init(&dev->dev);
-
/* We do not fill the DMA ops for platform devices by default.
* This is currently the responsibility of the platform code
* to do such, possibly using a device notifier
@@ -228,7 +225,6 @@ static struct platform_device *of_platform_device_create_pdata(
if (of_device_add(dev) != 0) {
platform_device_put(dev);
- of_reserved_mem_device_release(&dev->dev);
return NULL;
}