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authorPaul Walmsley <paul@pwsan.com>2008-08-19 11:08:43 +0300
committerTony Lindgren <tony@atomide.com>2008-08-19 11:08:43 +0300
commitd459bfe01f523983a822de8c2d3fe0bd2f2c194e (patch)
tree9f583480f3c0940778bb0f7b4fee5c68eb5b5bfc /arch/arm/plat-omap/Kconfig
parentecb24aa129c6d4b2152571f856320aa7dea41676 (diff)
ARM: OMAP2: Clockdomain: Add base OMAP2/3 clockdomain code
This patch creates an interface to the clockdomain registers in the PRM/CM modules on OMAP2/3. This interface is intended to be used by PM code, e.g., pm.c; not by device drivers directly. The patch also adds clockdomain usecount tracking. This is intended to be called whenever the first clock in a clockdomain is enabled, or when the last enabled clock in a clockdomain is disabled. If the clockdomain is in software-supervised mode, the code will force-wakeup or force-sleep the clockdomain. If the clockdomain is in hardware-supervised mode, the first clock enable will add sleep and wakeup dependencies on a user-selectable set of parent domains (usually MPU & IVA2), and the disable will remove them. Each clockdomain will be defined in later patches as static structures. The clockdomain structures are linked into a list at boot by clkdm_register(), similar to the OMAP clock code. The patch adds a Kconfig option, CONFIG_OMAP_DEBUG_CLOCKDOMAIN, which when enabled will emit verbose debug messages via pr_debug(). Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/plat-omap/Kconfig')
-rw-r--r--arch/arm/plat-omap/Kconfig12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig
index e815fa35f7f..ef62bf21e17 100644
--- a/arch/arm/plat-omap/Kconfig
+++ b/arch/arm/plat-omap/Kconfig
@@ -41,6 +41,18 @@ config OMAP_DEBUG_POWERDOMAIN
for every powerdomain register write. However, the
extra detail costs some memory.
+config OMAP_DEBUG_CLOCKDOMAIN
+ bool "Emit debug messages from clockdomain layer"
+ depends on ARCH_OMAP2 || ARCH_OMAP3
+ default n
+ help
+ Say Y here if you want to compile in clockdomain layer
+ debugging messages for OMAP2/3. These messages can
+ provide more detail as to why some clockdomain calls
+ may be failing, and will also emit a descriptive message
+ for every clockdomain register write. However, the
+ extra detail costs some memory.
+
config OMAP_RESET_CLOCKS
bool "Reset unused clocks during boot"
depends on ARCH_OMAP