OMAP2+: hwmod: add postsetup state

Allow board files and OMAP core code to control the state that some or
all of the hwmods end up in at the end of _setup() (called by
omap_hwmod_late_init() ).  Reimplement the old skip_setup_idle code in
terms of this new postsetup state code.

There are two use-cases for this patch: the !CONFIG_PM_RUNTIME case,
in which all IP blocks should stay enabled after _setup() finishes;
and the MPU watchdog case, in which the watchdog IP block should enter
idle if watchdog coverage of kernel initialization is desired, and
should be disabled otherwise.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoît Cousson <b-cousson@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Charulatha Varadarajan <charu@ti.com>

1 files changed, 20 insertions, 12 deletions

diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
index 77bf0d1baeef..7362b69a154d 100644
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -312,6 +312,11 @@ static int __init _omap2_init_reprogram_sdrc(void)
         return v;
 }
 
+static int _set_hwmod_postsetup_state(struct omap_hwmod *oh, void *data)
+{
+        return omap_hwmod_set_postsetup_state(oh, *(u8 *)data);
+}
+
 /*
  * Initialize asm_irq_base for entry-macro.S
  */
@@ -333,6 +338,8 @@ static inline void omap_irq_base_init(void)
 
 void __init omap2_init_common_infrastructure(void)
 {
+        u8 postsetup_state;
+
         pwrdm_init(powerdomains_omap);
         clkdm_init(clockdomains_omap, clkdm_autodeps);
         if (cpu_is_omap242x())
@@ -343,6 +350,16 @@ void __init omap2_init_common_infrastructure(void)
                 omap3xxx_hwmod_init();
         else if (cpu_is_omap44xx())
                 omap44xx_hwmod_init();
+        else
+                pr_err("Could not init hwmod data - unknown SoC\n");
+
+        /* Set the default postsetup state for all hwmods */
+#ifdef CONFIG_PM_RUNTIME
+        postsetup_state = _HWMOD_STATE_IDLE;
+#else
+        postsetup_state = _HWMOD_STATE_ENABLED;
+#endif
+        omap_hwmod_for_each(_set_hwmod_postsetup_state, &postsetup_state);
 
         omap_pm_if_early_init();
 
@@ -355,25 +372,16 @@ void __init omap2_init_common_infrastructure(void)
         else if (cpu_is_omap44xx())
                 omap4xxx_clk_init();
         else
-                pr_err("Could not init clock framework - unknown CPU\n");
+                pr_err("Could not init clock framework - unknown SoC\n");
 }
 
-/*
- * XXX Ideally, this function will dwindle into nothingness over time;
- * almost all device init code should be possible through initcalls
- * and other generalized mechanisms
- */
 void __init omap2_init_common_devices(struct omap_sdrc_params *sdrc_cs0,
                                       struct omap_sdrc_params *sdrc_cs1)
 {
-        u8 skip_setup_idle = 0;
-
         omap_serial_early_init();
 
-#ifndef CONFIG_PM_RUNTIME
-        skip_setup_idle = 1;
-#endif
-        omap_hwmod_late_init(skip_setup_idle);
+        omap_hwmod_late_init();
+
         if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
                 omap2_sdrc_init(sdrc_cs0, sdrc_cs1);
                 _omap2_init_reprogram_sdrc();