diff options
| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2014-02-28 13:42:48 (GMT) |
|---|---|---|
| committer | Grant Likely <grant.likely@linaro.org> | 2014-03-11 17:26:58 (GMT) |
| commit | 3f0c8206644836e4f10a6b9fc47cda6a9a372f9b (patch) | |
| tree | c85e72e465074dd94761f8a685a2110a3b7f8db9 /drivers/of/fdt.c | |
| parent | e8d9d1f5485b52ec3c4d7af839e6914438f6c285 (diff) | |
| download | linux-3f0c8206644836e4f10a6b9fc47cda6a9a372f9b.tar.xz | |
drivers: of: add initialization code for dynamic reserved memory
This patch adds support for dynamically allocated reserved memory regions
declared in device tree. Such regions are defined by 'size', 'alignment'
and 'alloc-ranges' properties.
Based on previous code provided by Josh Cartwright <joshc@codeaurora.org>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Diffstat (limited to 'drivers/of/fdt.c')
| -rw-r--r-- | drivers/of/fdt.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index 819e112..510c0d8 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -15,6 +15,7 @@ #include <linux/module.h> #include <linux/of.h> #include <linux/of_fdt.h> +#include <linux/of_reserved_mem.h> #include <linux/sizes.h> #include <linux/string.h> #include <linux/errno.h> @@ -450,7 +451,7 @@ static int __init __reserved_mem_reserve_reg(unsigned long node, phys_addr_t base, size; unsigned long len; __be32 *prop; - int nomap; + int nomap, first = 1; prop = of_get_flat_dt_prop(node, "reg", &len); if (!prop) @@ -477,6 +478,10 @@ static int __init __reserved_mem_reserve_reg(unsigned long node, uname, &base, (unsigned long)size / SZ_1M); len -= t_len; + if (first) { + fdt_reserved_mem_save_node(node, uname, base, size); + first = 0; + } } return 0; } @@ -512,6 +517,7 @@ static int __init __fdt_scan_reserved_mem(unsigned long node, const char *uname, { static int found; const char *status; + int err; if (!found && depth == 1 && strcmp(uname, "reserved-memory") == 0) { if (__reserved_mem_check_root(node) != 0) { @@ -534,7 +540,9 @@ static int __init __fdt_scan_reserved_mem(unsigned long node, const char *uname, if (status && strcmp(status, "okay") != 0 && strcmp(status, "ok") != 0) return 0; - __reserved_mem_reserve_reg(node, uname); + err = __reserved_mem_reserve_reg(node, uname); + if (err == -ENOENT && of_get_flat_dt_prop(node, "size", NULL)) + fdt_reserved_mem_save_node(node, uname, 0, 0); /* scan next node */ return 0; @@ -550,6 +558,7 @@ static int __init __fdt_scan_reserved_mem(unsigned long node, const char *uname, void __init early_init_fdt_scan_reserved_mem(void) { of_scan_flat_dt(__fdt_scan_reserved_mem, NULL); + fdt_init_reserved_mem(); } /** |