OMAP: hwmod: allow omap_hwmod_late_init() caller to skip module idle in _setup()

On kernels that don't use the omap_device_enable() calls to enable
devices, leave all on-chip devices enabled in hwmod _setup().
Otherwise, accesses to those devices are likely to fail, crashing the
system.  It's expected that kernels built without CONFIG_PM_RUNTIME
will be the primary use-case for this.  This functionality is
controlled by adding an extra parameter to omap_hwmod_late_init().

This patch is based on the patch "OMAP: hwmod: don't auto-disable
hwmod when !CONFIG_PM_RUNTIME" by Kevin Hilman
<khilman@deeprootsystems.com>.

Cc: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
index 3cfb425ea67e..e95b47b3bfd3 100644
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -316,6 +316,8 @@ static int __init _omap2_init_reprogram_sdrc(void)
 void __init omap2_init_common_hw(struct omap_sdrc_params *sdrc_cs0,
                                  struct omap_sdrc_params *sdrc_cs1)
 {
+        u8 skip_setup_idle = 0;
+
         pwrdm_init(powerdomains_omap);
         clkdm_init(clockdomains_omap, clkdm_autodeps);
         if (cpu_is_omap242x())
@@ -340,8 +342,13 @@ void __init omap2_init_common_hw(struct omap_sdrc_params *sdrc_cs0,
                 pr_err("Could not init clock framework - unknown CPU\n");
 
         omap_serial_early_init();
+
+#ifndef CONFIG_PM_RUNTIME
+        skip_setup_idle = 1;
+#endif
         if (cpu_is_omap24xx() || cpu_is_omap34xx())   /* FIXME: OMAP4 */
-                omap_hwmod_late_init();
+                omap_hwmod_late_init(skip_setup_idle);
+
         omap_pm_if_init();
         if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
                 omap2_sdrc_init(sdrc_cs0, sdrc_cs1);