From 4af4016c53f52b26461b8030211f8427a58fa5ed Mon Sep 17 00:00:00 2001 From: Kevin Hilman Date: Wed, 4 Feb 2009 10:51:40 -0800 Subject: OMAP3: PM: UART: disable clocks when idle and off-mode support This patch allows the UART clocks to be disabled when the OMAP UARTs are inactive, thus permitting the chip to hit retention in idle. After the expiration of an activity timer, each UART is allowed to disable its clocks so the system can enter retention. The activity timer is (re)activated on any UART interrupt, UART wake event or any IO pad wakeup. The actual disable of the UART clocks is done in the 'prepare_idle' hook called from the OMAP idle loop. While the activity timer is active, the smart-idle mode of the UART is also disabled. This is due to a "feature" of the UART module that after a UART wakeup, the smart-idle mode may be entered before the UART has communicated the interrupt, or upon TX, an idle mode may be entered before the TX FIFOs are emptied. Upon suspend, the 'prepare_suspend' hook cancels any pending activity timers and allows the clocks to be disabled immediately. In addition, upon disabling clocks the UART state is saved in case of an off-mode transition while clocks are off. Special thanks to Tero Kristo for the initial ideas and first versions of UART idle support, and to Jouni Hogander for extra testing and bugfixes. Tested on OMAP3 (Beagle, RX51, SDP, EVM) and OMAP2 (n810) Cc: Tero Kristo Cc: Jouni Hogander Signed-off-by: Kevin Hilman --- arch/arm/plat-omap/include/mach/common.h | 2 -- 1 file changed, 2 deletions(-) (limited to 'arch/arm/plat-omap/include/mach/common.h') diff --git a/arch/arm/plat-omap/include/mach/common.h b/arch/arm/plat-omap/include/mach/common.h index 0ecf36deb17b..834f0b3aad18 100644 --- a/arch/arm/plat-omap/include/mach/common.h +++ b/arch/arm/plat-omap/include/mach/common.h @@ -33,8 +33,6 @@ struct sys_timer; extern void omap_map_common_io(void); extern struct sys_timer omap_timer; -extern void omap_serial_init(void); -extern void omap_serial_enable_clocks(int enable); #if defined(CONFIG_I2C_OMAP) || defined(CONFIG_I2C_OMAP_MODULE) extern int omap_register_i2c_bus(int bus_id, u32 clkrate, struct i2c_board_info const *info, -- cgit v1.2.2 From 44169075e6eaa87bab6a296209d8d0610879b394 Mon Sep 17 00:00:00 2001 From: Santosh Shilimkar Date: Thu, 28 May 2009 14:16:04 -0700 Subject: ARM: OMAP4: Add minimal support for omap4 This patch adds the support for OMAP4. The platform and machine specific headers and sources updated for OMAP4430 SDP platform. OMAP4430 is Texas Instrument's SOC based on ARM Cortex-A9 SMP architecture. It's a dual core SOC with GIC used for interrupt handling and SCU for cache coherency. Signed-off-by: Santosh Shilimkar Signed-off-by: Tony Lindgren --- arch/arm/plat-omap/include/mach/common.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/arm/plat-omap/include/mach/common.h') diff --git a/arch/arm/plat-omap/include/mach/common.h b/arch/arm/plat-omap/include/mach/common.h index 0ecf36deb17b..4b188334c666 100644 --- a/arch/arm/plat-omap/include/mach/common.h +++ b/arch/arm/plat-omap/include/mach/common.h @@ -62,6 +62,7 @@ struct omap_globals { void omap2_set_globals_242x(void); void omap2_set_globals_243x(void); void omap2_set_globals_343x(void); +void omap2_set_globals_443x(void); /* These get called from omap2_set_globals_xxxx(), do not call these */ void omap2_set_globals_tap(struct omap_globals *); -- cgit v1.2.2