From d459bfe01f523983a822de8c2d3fe0bd2f2c194e Mon Sep 17 00:00:00 2001 From: Paul Walmsley Date: Tue, 19 Aug 2008 11:08:43 +0300 Subject: 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 Signed-off-by: Tony Lindgren --- arch/arm/plat-omap/Kconfig | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'arch/arm/plat-omap/Kconfig') diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig index e815fa35f7f4..ef62bf21e179 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 -- cgit v1.2.2