diff options
Diffstat (limited to 'target/linux/ipq806x/patches/0051-drivers-of-add-support-for-custom-reserved-memory-dr.patch')
| -rw-r--r-- | target/linux/ipq806x/patches/0051-drivers-of-add-support-for-custom-reserved-memory-dr.patch | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches/0051-drivers-of-add-support-for-custom-reserved-memory-dr.patch b/target/linux/ipq806x/patches/0051-drivers-of-add-support-for-custom-reserved-memory-dr.patch new file mode 100644 index 0000000000..ce01a8f084 --- /dev/null +++ b/target/linux/ipq806x/patches/0051-drivers-of-add-support-for-custom-reserved-memory-dr.patch @@ -0,0 +1,156 @@ +From fc9e25ed9db2fcfbf16a9cbbf5a1f449da78f1d9 Mon Sep 17 00:00:00 2001 +From: Marek Szyprowski <m.szyprowski@samsung.com> +Date: Fri, 28 Feb 2014 14:42:49 +0100 +Subject: [PATCH 051/182] drivers: of: add support for custom reserved memory + drivers + +Add support for custom reserved memory drivers. Call their init() function +for each reserved region and prepare for using operations provided by them +with by the reserved_mem->ops array. + +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> +--- + drivers/of/of_reserved_mem.c | 29 +++++++++++++++++++++++++++++ + include/asm-generic/vmlinux.lds.h | 11 +++++++++++ + include/linux/of_reserved_mem.h | 32 ++++++++++++++++++++++++++++++++ + 3 files changed, 72 insertions(+) + +diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c +index 69b8117..daaaf93 100644 +--- a/drivers/of/of_reserved_mem.c ++++ b/drivers/of/of_reserved_mem.c +@@ -170,6 +170,33 @@ static int __init __reserved_mem_alloc_size(unsigned long node, + return 0; + } + ++static const struct of_device_id __rmem_of_table_sentinel ++ __used __section(__reservedmem_of_table_end); ++ ++/** ++ * res_mem_init_node() - call region specific reserved memory init code ++ */ ++static int __init __reserved_mem_init_node(struct reserved_mem *rmem) ++{ ++ extern const struct of_device_id __reservedmem_of_table[]; ++ const struct of_device_id *i; ++ ++ for (i = __reservedmem_of_table; i < &__rmem_of_table_sentinel; i++) { ++ reservedmem_of_init_fn initfn = i->data; ++ const char *compat = i->compatible; ++ ++ if (!of_flat_dt_is_compatible(rmem->fdt_node, compat)) ++ continue; ++ ++ if (initfn(rmem, rmem->fdt_node, rmem->name) == 0) { ++ pr_info("Reserved memory: initialized node %s, compatible id %s\n", ++ rmem->name, compat); ++ return 0; ++ } ++ } ++ return -ENOENT; ++} ++ + /** + * fdt_init_reserved_mem - allocate and init all saved reserved memory regions + */ +@@ -184,5 +211,7 @@ void __init fdt_init_reserved_mem(void) + if (rmem->size == 0) + err = __reserved_mem_alloc_size(node, rmem->name, + &rmem->base, &rmem->size); ++ if (err == 0) ++ __reserved_mem_init_node(rmem); + } + } +diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h +index bd02ca7..146e4ff 100644 +--- a/include/asm-generic/vmlinux.lds.h ++++ b/include/asm-generic/vmlinux.lds.h +@@ -167,6 +167,16 @@ + #define CLK_OF_TABLES() + #endif + ++#ifdef CONFIG_OF_RESERVED_MEM ++#define RESERVEDMEM_OF_TABLES() \ ++ . = ALIGN(8); \ ++ VMLINUX_SYMBOL(__reservedmem_of_table) = .; \ ++ *(__reservedmem_of_table) \ ++ *(__reservedmem_of_table_end) ++#else ++#define RESERVEDMEM_OF_TABLES() ++#endif ++ + #ifdef CONFIG_SMP + #define CPU_METHOD_OF_TABLES() . = ALIGN(8); \ + VMLINUX_SYMBOL(__cpu_method_of_table_begin) = .; \ +@@ -499,6 +509,7 @@ + TRACE_SYSCALLS() \ + MEM_DISCARD(init.rodata) \ + CLK_OF_TABLES() \ ++ RESERVEDMEM_OF_TABLES() \ + CLKSRC_OF_TABLES() \ + CPU_METHOD_OF_TABLES() \ + KERNEL_DTB() \ +diff --git a/include/linux/of_reserved_mem.h b/include/linux/of_reserved_mem.h +index 89226ed..9b1fbb7 100644 +--- a/include/linux/of_reserved_mem.h ++++ b/include/linux/of_reserved_mem.h +@@ -1,21 +1,53 @@ + #ifndef __OF_RESERVED_MEM_H + #define __OF_RESERVED_MEM_H + ++struct device; ++struct of_phandle_args; ++struct reserved_mem_ops; ++ + struct reserved_mem { + const char *name; + unsigned long fdt_node; ++ const struct reserved_mem_ops *ops; + phys_addr_t base; + phys_addr_t size; ++ void *priv; ++}; ++ ++struct reserved_mem_ops { ++ void (*device_init)(struct reserved_mem *rmem, ++ struct device *dev); ++ void (*device_release)(struct reserved_mem *rmem, ++ struct device *dev); + }; + ++typedef int (*reservedmem_of_init_fn)(struct reserved_mem *rmem, ++ unsigned long node, const char *uname); ++ + #ifdef CONFIG_OF_RESERVED_MEM + void fdt_init_reserved_mem(void); + void fdt_reserved_mem_save_node(unsigned long node, const char *uname, + phys_addr_t base, phys_addr_t size); ++ ++#define RESERVEDMEM_OF_DECLARE(name, compat, init) \ ++ static const struct of_device_id __reservedmem_of_table_##name \ ++ __used __section(__reservedmem_of_table) \ ++ = { .compatible = compat, \ ++ .data = (init == (reservedmem_of_init_fn)NULL) ? \ ++ init : init } ++ + #else + static inline void fdt_init_reserved_mem(void) { } + static inline void fdt_reserved_mem_save_node(unsigned long node, + const char *uname, phys_addr_t base, phys_addr_t size) { } ++ ++#define RESERVEDMEM_OF_DECLARE(name, compat, init) \ ++ static const struct of_device_id __reservedmem_of_table_##name \ ++ __attribute__((unused)) \ ++ = { .compatible = compat, \ ++ .data = (init == (reservedmem_of_init_fn)NULL) ? \ ++ init : init } ++ + #endif + + #endif /* __OF_RESERVED_MEM_H */ +-- +1.7.10.4 + |