diff options
Diffstat (limited to 'drivers/of')
| -rw-r--r-- | drivers/of/base.c | 54 | ||||
| -rw-r--r-- | drivers/of/fdt.c | 24 | ||||
| -rw-r--r-- | drivers/of/of_reserved_mem.c | 14 | ||||
| -rw-r--r-- | drivers/of/unittest.c | 4 |
4 files changed, 59 insertions, 37 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c index 13ebb16be64e..d023cf303d56 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -16,6 +16,7 @@ #define pr_fmt(fmt) "OF: " fmt +#include <linux/bitmap.h> #include <linux/console.h> #include <linux/ctype.h> #include <linux/cpu.h> @@ -1986,6 +1987,59 @@ int of_alias_get_id(struct device_node *np, const char *stem) EXPORT_SYMBOL_GPL(of_alias_get_id); /** + * of_alias_get_alias_list - Get alias list for the given device driver + * @matches: Array of OF device match structures to search in + * @stem: Alias stem of the given device_node + * @bitmap: Bitmap field pointer + * @nbits: Maximum number of alias IDs which can be recorded in bitmap + * + * The function travels the lookup table to record alias ids for the given + * device match structures and alias stem. + * + * Return: 0 or -ENOSYS when !CONFIG_OF or + * -EOVERFLOW if alias ID is greater then allocated nbits + */ +int of_alias_get_alias_list(const struct of_device_id *matches, + const char *stem, unsigned long *bitmap, + unsigned int nbits) +{ + struct alias_prop *app; + int ret = 0; + + /* Zero bitmap field to make sure that all the time it is clean */ + bitmap_zero(bitmap, nbits); + + mutex_lock(&of_mutex); + pr_debug("%s: Looking for stem: %s\n", __func__, stem); + list_for_each_entry(app, &aliases_lookup, link) { + pr_debug("%s: stem: %s, id: %d\n", + __func__, app->stem, app->id); + + if (strcmp(app->stem, stem) != 0) { + pr_debug("%s: stem comparison didn't pass %s\n", + __func__, app->stem); + continue; + } + + if (of_match_node(matches, app->np)) { + pr_debug("%s: Allocated ID %d\n", __func__, app->id); + + if (app->id >= nbits) { + pr_warn("%s: ID %d >= than bitmap field %d\n", + __func__, app->id, nbits); + ret = -EOVERFLOW; + } else { + set_bit(app->id, bitmap); + } + } + } + mutex_unlock(&of_mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(of_alias_get_alias_list); + +/** * of_alias_get_highest_id - Get highest alias id for the given stem * @stem: Alias stem to be examined * diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index 76c83c1ffeda..bb532aae0d92 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -11,7 +11,6 @@ #include <linux/crc32.h> #include <linux/kernel.h> #include <linux/initrd.h> -#include <linux/bootmem.h> #include <linux/memblock.h> #include <linux/mutex.h> #include <linux/of.h> @@ -1115,7 +1114,6 @@ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname, return 1; } -#ifdef CONFIG_HAVE_MEMBLOCK #ifndef MIN_MEMBLOCK_ADDR #define MIN_MEMBLOCK_ADDR __pa(PAGE_OFFSET) #endif @@ -1178,29 +1176,9 @@ int __init __weak early_init_dt_reserve_memory_arch(phys_addr_t base, return memblock_reserve(base, size); } -#else -void __init __weak early_init_dt_add_memory_arch(u64 base, u64 size) -{ - WARN_ON(1); -} - -int __init __weak early_init_dt_mark_hotplug_memory_arch(u64 base, u64 size) -{ - return -ENOSYS; -} - -int __init __weak early_init_dt_reserve_memory_arch(phys_addr_t base, - phys_addr_t size, bool nomap) -{ - pr_err("Reserved memory not supported, ignoring range %pa - %pa%s\n", - &base, &size, nomap ? " (nomap)" : ""); - return -ENOSYS; -} -#endif - static void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) { - return memblock_virt_alloc(size, align); + return memblock_alloc(size, align); } bool __init early_init_dt_verify(void *params) diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c index 895c83e0c7b6..1977ee0adcb1 100644 --- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -20,13 +20,12 @@ #include <linux/of_reserved_mem.h> #include <linux/sort.h> #include <linux/slab.h> +#include <linux/memblock.h> #define MAX_RESERVED_REGIONS 32 static struct reserved_mem reserved_mem[MAX_RESERVED_REGIONS]; static int reserved_mem_count; -#if defined(CONFIG_HAVE_MEMBLOCK) -#include <linux/memblock.h> int __init __weak early_init_dt_alloc_reserved_memory_arch(phys_addr_t size, phys_addr_t align, phys_addr_t start, phys_addr_t end, bool nomap, phys_addr_t *res_base) @@ -37,6 +36,7 @@ int __init __weak early_init_dt_alloc_reserved_memory_arch(phys_addr_t size, * panic()s on allocation failure. */ end = !end ? MEMBLOCK_ALLOC_ANYWHERE : end; + align = !align ? SMP_CACHE_BYTES : align; base = __memblock_alloc_base(size, align, end); if (!base) return -ENOMEM; @@ -54,16 +54,6 @@ int __init __weak early_init_dt_alloc_reserved_memory_arch(phys_addr_t size, return memblock_remove(base, size); return 0; } -#else -int __init __weak early_init_dt_alloc_reserved_memory_arch(phys_addr_t size, - phys_addr_t align, phys_addr_t start, phys_addr_t end, bool nomap, - phys_addr_t *res_base) -{ - pr_err("Reserved memory not supported, ignoring region 0x%llx%s\n", - size, nomap ? " (nomap)" : ""); - return -ENOSYS; -} -#endif /** * res_mem_save_node() - save fdt node for second pass initialization diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c index a3a6866765f2..49ae2aa744d6 100644 --- a/drivers/of/unittest.c +++ b/drivers/of/unittest.c @@ -5,7 +5,7 @@ #define pr_fmt(fmt) "### dt-test ### " fmt -#include <linux/bootmem.h> +#include <linux/memblock.h> #include <linux/clk.h> #include <linux/err.h> #include <linux/errno.h> @@ -2192,7 +2192,7 @@ static struct device_node *overlay_base_root; static void * __init dt_alloc_memory(u64 size, u64 align) { - return memblock_virt_alloc(size, align); + return memblock_alloc(size, align); } /* |