diff options
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod.c | 45 |
1 files changed, 42 insertions, 3 deletions
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index e5cafed8ef2..ff729706c5a 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -138,6 +138,8 @@ #include <linux/spinlock.h> #include <linux/slab.h> #include <linux/bootmem.h> +#include <linux/of.h> +#include <linux/of_address.h> #include <asm/system_misc.h> @@ -2346,6 +2348,34 @@ static int _shutdown(struct omap_hwmod *oh) } /** + * of_dev_hwmod_lookup - look up needed hwmod from dt blob + * @np: struct device_node * + * @oh: struct omap_hwmod * + * + * Parse the dt blob and find out needed hwmod. Recursive function is + * implemented to take care hierarchical dt blob parsing. + * Return: The device node on success or NULL on failure. + */ +static struct device_node *of_dev_hwmod_lookup(struct device_node *np, + struct omap_hwmod *oh) +{ + struct device_node *np0 = NULL, *np1 = NULL; + const char *p; + + for_each_child_of_node(np, np0) { + if (of_find_property(np0, "ti,hwmods", NULL)) { + p = of_get_property(np0, "ti,hwmods", NULL); + if (!strcmp(p, oh->name)) + return np0; + np1 = of_dev_hwmod_lookup(np0, oh); + if (np1) + return np1; + } + } + return NULL; +} + +/** * _init_mpu_rt_base - populate the virtual address for a hwmod * @oh: struct omap_hwmod * to locate the virtual address * @@ -2357,7 +2387,8 @@ static int _shutdown(struct omap_hwmod *oh) static void __init _init_mpu_rt_base(struct omap_hwmod *oh, void *data) { struct omap_hwmod_addr_space *mem; - void __iomem *va_start; + void __iomem *va_start = NULL; + struct device_node *np; if (!oh) return; @@ -2371,10 +2402,18 @@ static void __init _init_mpu_rt_base(struct omap_hwmod *oh, void *data) if (!mem) { pr_debug("omap_hwmod: %s: no MPU register target found\n", oh->name); - return; + + /* Extract the IO space from device tree blob */ + if (!of_have_populated_dt()) + return; + + np = of_dev_hwmod_lookup(of_find_node_by_name(NULL, "ocp"), oh); + if (np) + va_start = of_iomap(np, 0); + } else { + va_start = ioremap(mem->pa_start, mem->pa_end - mem->pa_start); } - va_start = ioremap(mem->pa_start, mem->pa_end - mem->pa_start); if (!va_start) { pr_err("omap_hwmod: %s: Could not ioremap\n", oh->name); return; |