diff options
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod.c | 29 |
1 files changed, 19 insertions, 10 deletions
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index d9ee0ff094d4..3d5db8c83b3c 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -2361,21 +2361,23 @@ static struct device_node *of_dev_hwmod_lookup(struct device_node *np, * Cache the virtual address used by the MPU to access this IP block's * registers. This address is needed early so the OCP registers that * are part of the device's address space can be ioremapped properly. - * No return value. + * + * Returns 0 on success, -EINVAL if an invalid hwmod is passed, and + * -ENXIO on absent or invalid register target address space. */ -static void __init _init_mpu_rt_base(struct omap_hwmod *oh, void *data) +static int __init _init_mpu_rt_base(struct omap_hwmod *oh, void *data) { struct omap_hwmod_addr_space *mem; void __iomem *va_start = NULL; struct device_node *np; if (!oh) - return; + return -EINVAL; _save_mpu_port_index(oh); if (oh->_int_flags & _HWMOD_NO_MPU_PORT) - return; + return -ENXIO; mem = _find_mpu_rt_addr_space(oh); if (!mem) { @@ -2384,7 +2386,7 @@ static void __init _init_mpu_rt_base(struct omap_hwmod *oh, void *data) /* Extract the IO space from device tree blob */ if (!of_have_populated_dt()) - return; + return -ENXIO; np = of_dev_hwmod_lookup(of_find_node_by_name(NULL, "ocp"), oh); if (np) @@ -2395,13 +2397,14 @@ static void __init _init_mpu_rt_base(struct omap_hwmod *oh, void *data) if (!va_start) { pr_err("omap_hwmod: %s: Could not ioremap\n", oh->name); - return; + return -ENXIO; } pr_debug("omap_hwmod: %s: MPU register target at va %p\n", oh->name, va_start); oh->_mpu_rt_va = va_start; + return 0; } /** @@ -2414,8 +2417,8 @@ static void __init _init_mpu_rt_base(struct omap_hwmod *oh, void *data) * registered at this point. This is the first of two phases for * hwmod initialization. Code called here does not touch any hardware * registers, it simply prepares internal data structures. Returns 0 - * upon success or if the hwmod isn't registered, or -EINVAL upon - * failure. + * upon success or if the hwmod isn't registered or if the hwmod's + * address space is not defined, or -EINVAL upon failure. */ static int __init _init(struct omap_hwmod *oh, void *data) { @@ -2424,8 +2427,14 @@ static int __init _init(struct omap_hwmod *oh, void *data) if (oh->_state != _HWMOD_STATE_REGISTERED) return 0; - if (oh->class->sysc) - _init_mpu_rt_base(oh, NULL); + if (oh->class->sysc) { + r = _init_mpu_rt_base(oh, NULL); + if (r < 0) { + WARN(1, "omap_hwmod: %s: doesn't have mpu register target base\n", + oh->name); + return 0; + } + } r = _init_clocks(oh, NULL); if (r < 0) { |
