[PATCHv4 7/8] ARM: OMAP: clockdomain: add support for preventing autodep delete

[Tero Kristo]

Some clockdomains bug out if their autodeps are deleted before idle.
This happens namely with OMAP3 PER domain, it will bug out if it
doesn't have wakedeps enabled when it enters off-mode. This patch
adds support for new flag 'CLKDM_NO_AUTODEP_DISABLE' which does this.

Signed-off-by: Tero Kristo <t-kristo at ti.com>
---
 arch/arm/mach-omap2/clockdomain.c |    3 +++
 arch/arm/mach-omap2/clockdomain.h |    4 ++++
 2 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/clockdomain.c b/arch/arm/mach-omap2/clockdomain.c
index 7f5423e..56cef58 100644
--- a/arch/arm/mach-omap2/clockdomain.c
+++ b/arch/arm/mach-omap2/clockdomain.c
@@ -201,6 +201,9 @@ void _clkdm_del_autodeps(struct clockdomain *clkdm)
 	if (!autodeps || clkdm->flags & CLKDM_NO_AUTODEPS)
 		return;
 
+	if (clkdm->flags & CLKDM_NO_AUTODEP_DISABLE)
+		return;
+
 	for (autodep = autodeps; autodep->clkdm.ptr; autodep++) {
 		if (IS_ERR(autodep->clkdm.ptr))
 			continue;
diff --git a/arch/arm/mach-omap2/clockdomain.h b/arch/arm/mach-omap2/clockdomain.h
index 373399a..1fc5314 100644
--- a/arch/arm/mach-omap2/clockdomain.h
+++ b/arch/arm/mach-omap2/clockdomain.h
@@ -31,12 +31,16 @@
  *
  * CLKDM_NO_AUTODEPS: Prevent "autodeps" from being added/removed from this
  *     clockdomain.  (Currently, this applies to OMAP3 clockdomains only.)
+ * CLKDM_NO_AUTODEP_DISABLE: Prevent clockdomain code from deleting autodeps.
+ *     Needed for PER domain on omap3, as it will bug out with off-mode if
+ *     wakedeps are removed.
  */
 #define CLKDM_CAN_FORCE_SLEEP			(1 << 0)
 #define CLKDM_CAN_FORCE_WAKEUP			(1 << 1)
 #define CLKDM_CAN_ENABLE_AUTO			(1 << 2)
 #define CLKDM_CAN_DISABLE_AUTO			(1 << 3)
 #define CLKDM_NO_AUTODEPS			(1 << 4)
+#define CLKDM_NO_AUTODEP_DISABLE		(1 << 5)
 
 #define CLKDM_CAN_HWSUP		(CLKDM_CAN_ENABLE_AUTO | CLKDM_CAN_DISABLE_AUTO)
 #define CLKDM_CAN_SWSUP		(CLKDM_CAN_FORCE_SLEEP | CLKDM_CAN_FORCE_WAKEUP)
-- 
1.7.4.1