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2010-03-15omap2/3/4: serial: Remove condition for getting uart4_physSergio Aguirre1-13/+1
This check is invalid, since we haven't filled the omap_revision var at this point. Signed-off-by: Sergio Aguirre <saaguirre@ti.com>
2010-03-15OMAP3: serial: Use dev_* macros instead of printkSergio Aguirre1-6/+6
As we have a struct device populated at the time we are printing the errors, using dev_* macros makes more sense, as could give a better idea where the error/warning came from. Signed-off-by: Sergio Aguirre <saaguirre@ti.com>
2010-03-15OMAP3: serial: Check for zero-based physical addrSergio Aguirre1-0/+13
This is for protecting a wrong mapping attempt of a zero-based physical address. The result is that, no serial port will be attempted to be mapped. Also add an additional protection for NULL clocks before attempting to enable them (if above condition applies) Signed-off-by: Sergio Aguirre <saaguirre@ti.com>
2010-03-11OMAP2: serial.c: Fix number of uarts in early_initThomas Weber1-5/+10
The omap_serial_early_init prints the following errors: Could not get uart4_ick Could not get uart4_fck because all the uarts available in omap_uart[] will be initialized. Only omap4430 and omap3630 have 4 uarts at the moment. This patch reduces the number of uarts when cpu is not omap4430 or omap3630. Signed-off-by: Thomas Weber <weber@corscience.de> Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-02-23omap3/4: uart: fix full-fifo write abortSantosh Shilimkar1-3/+28
This patch is addition to the already merged commit on non-empty uart fifo read abort. "ce13d4716a276f4331d78ba28a5093a63822ab95" OMAP3630 and OMAP4430 UART IP blocks have a restriction on TX FIFO too. If you try to write to the tx fifo when it is full, the system aborts. More details on this thread are here: http://www.mail-archive.com/linux-omap@vger.kernel.org/msg19447.html This can be easily reproducible by not suppressing interconnect errors or long duration testing where continuous prints over console from multiple threads. This patch is addressing the issue by ensuring that write is not issued while fifo is full. A timeout is added to avoid any hang on fifo-full for 10 mS which is unlikely case. Patch is validated on OMAP3630 and OMAP4 SDP. V2 version removed the additional 1 uS on every TX as per Tony's suggestion Signed-off-by: Woodruff Richard <r-woodruff2@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> CC: Ghorai Sukumar <s-ghorai@ti.com> Reviewed-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-02-15omap2/3/4: serial: fix coding style indentaionvikram pandita1-9/+10
No logical code change Fix coding style indentaion as per checkpatch.pl Fix multi-line comment style reported by Nishanth Menon Signed-off-by: Vikram Pandita <vikram.pandita@ti.com> Cc: Nishanth Menon <nm@ti.com> Acked-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-02-15omap2/3/4: Fix mach-omap2/serial.c for multibootTony Lindgren1-7/+20
Initialize UART4 only for 3630 and 44xx. Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-02-15Merge branch 'debug-ll' into omap-for-linusTony Lindgren1-4/+11
2010-02-15omap: Clean the serial port definesTony Lindgren1-4/+11
This way we don't have conflicts with the defines with compiling in multiple omaps. Set the addresses for uarts in struct omap_globals for the early serial init code. Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-02-03omap: Disable serial port autoidle by defaultTony Lindgren1-2/+9
Currently the omap serial clocks are autoidled after 5 seconds. However, this causes lost characters on the serial ports. As this is considered non-standard behaviour for Linux, disable the timeout. Note that this will also cause blocking of any deeper omap sleep states. To enable the autoidling of the serial ports, do something like this for each serial port: # echo 5 > /sys/devices/platform/serial8250.0/sleep_timeout # echo 5 > /sys/devices/platform/serial8250.1/sleep_timeout ... Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-01-08omap2/3: make serial_in_override() address the right uart portAlexander Shishkin1-2/+10
Commit f62349ee9788b1d94c55eb6c291d74a1f69bdd9e makes it possible to have some other than first uart port as ttyS0, which breaks the workaround serial_in_override() function which will try to address the first uart port (for ttyS0) and not the one that was initialized. Signed-off-by: Alexander Shishkin <virtuoso@slind.org> CC: Mika Westerberg <ext-mika.1.westerberg@nokia.com> Acked-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-12-16OMAP3: serial - fix bug introduced inMika Westerberg1-3/+4
Commit f62349ee9788b1d94c55eb6c291d74a1f69bdd9e had side effect that causes kernel to oops when we are suspending to ram: # echo mem > /sys/power/state WARNING: at kernel/irq/manage.c:858 __free_irq+0x90/0x174() Trying to free already-free IRQ 72 Modules linked in: Backtrace: [<c00328d0>] (dump_backtrace+0x0/0x110) from [<c0347298>] (dump_stack+0x18/0x1c) r7:dfd4be08 r6:c009505c r5:c03fbfd1 r4:0000035a [<c0347280>] (dump_stack+0x0/0x1c) from [<c005a408>] (warn_slowpath_common+0x50/0x68) [<c005a3b8>] (warn_slowpath_common+0x0/0x68) from [<c005a46c>] (warn_slowpath_fmt+0x30) r7:c0474afc r6:00000048 r5:00000000 r4:c0474ac0 [<c005a43c>] (warn_slowpath_fmt+0x0/0x38) from [<c009505c>] (__free_irq+0x90/0x174) r3:00000048 r2:c03fc0ef [<c0094fcc>] (__free_irq+0x0/0x174) from [<c0095184>] (free_irq+0x44/0x64) [<c0095140>] (free_irq+0x0/0x64) from [<c0038100>] (omap_uart_enable_irqs+0x4c/0x90) r7:c034d58c r6:00000003 r5:00000000 r4:c0463028 [<c00380b4>] (omap_uart_enable_irqs+0x0/0x90) from [<c003d8f8>] (omap3_pm_begin+0x1c/0) r5:00000003 r4:00000000 [<c003d8dc>] (omap3_pm_begin+0x0/0x28) from [<c008d008>] (suspend_devices_and_enter+0x) [<c008cfd8>] (suspend_devices_and_enter+0x0/0x1dc) from [<c008d29c>] (enter_state+0xe8) r5:c03f7f46 r4:00000000 [<c008d1b4>] (enter_state+0x0/0x140) from [<c008c8e0>] (state_store+0x9c/0xc4) r7:c034d58c r6:00000003 r5:00000003 r4:c03f7f46 [<c008c844>] (state_store+0x0/0xc4) from [<c01cb2dc>] (kobj_attr_store+0x20/0x24) [<c01cb2bc>] (kobj_attr_store+0x0/0x24) from [<c0119420>] (sysfs_write_file+0x114/0x14) [<c011930c>] (sysfs_write_file+0x0/0x148) from [<c00cb298>] (vfs_write+0xb8/0x164) [<c00cb1e0>] (vfs_write+0x0/0x164) from [<c00cb408>] (sys_write+0x44/0x70) r8:4001f000 r7:00000004 r6:df81bd00 r5:00000000 r4:00000000 [<c00cb3c4>] (sys_write+0x0/0x70) from [<c002f040>] (ret_fast_syscall+0x0/0x38) r8:c002f204 r7:00000004 r6:401fa5e8 r5:4001f000 r4:00000004 This is due the fact that uart_list list was populated in omap_serial_early_init() and omap_uart_enable_irqs() went through this list even when serial idle wasn't enabled for all uarts. This patch moves the code that populates the uart_list and enables uart clocks into omap_serial_init_port(). Signed-off-by: Mika Westerberg <ext-mika.1.westerberg@nokia.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-12-11omap: serial: fix non-empty uart fifo read abortvikram pandita1-9/+27
OMAP3xxx and OMAP4430 UART IP blocks have a restriction wrt RX FIFO. Empty RX fifo read causes an abort. OMAP3xxx: UART IP revision >= 0x52 have this issue MVR register format is: Bits Field Name Description Type Reset 31:8 RESERVED RO 0x0 7:4 MAJOR Major revision number of the module. RO 0x-- 3:0 MINOR Minor revision number of the module. RO 0x-- OMAP4xxx: All revisions have this issue Revision id check is not used as the format of MVR resigster has changed For omap4 MVR register reads as: 0x50410602 => Revision id = 0x0602 Format of MVR register on omap4 is: (Courtesy: Cousson, Benoit) Bits Field Name Description Type Reset 31:30 SCHEME Scheme revision number of module RO 0x1 29:28 RESERVED RO 0x1 27:16 FUNC Function revision number of module RO 0x041 15:11 RTL Rtl revision number of module RO 0x00 10:8 MAJOR Major revision number of the module. RO 0x6 7:6 CUSTOM Custom revision number of the module. RO 0x0 5:0 MINOR Minor revision number of the module. RO 0x02 Override the default 8250 read handler: mem_serial_in() by a custom handler: serial_in_8250() which makes sure that RX fifo is not read when empty tested on zoom3(3630) board Cc: Benoit Cousson <b-cousson@ti.com> Signed-off-by: Vikram Pandita <vikram.pandita@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-12-11OMAP3: serial - allow platforms specify which UARTs to initializeMika Westerberg1-15/+55
This patch adds new function: omap_serial_init_port(port) that can be used to initialize only selected UARTs as serial ports. Platforms can then in their board files call this function instead of omap_serial_init() if they don't want to use all UARTs as serial ports. Signed-off-by: Mika Westerberg <ext-mika.1.westerberg@nokia.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-11-22omap: Eliminate OMAP_MAX_NR_PORTSAlexander Shishkin1-3/+3
Eliminate OMAP_MAX_NR_PORTS Note that also the null terminator entry for omap1 serial_platform_data needs to be now removed to avoid oopsing. Note that mach-omap1 uses struct plat_serial8250_port array, which requires a null terminator at the end, and that's why we need to use ARRAY_SIZE - 1. This is not needed on mach-omap2 as the array used is struct omap_uart_state, and does not use a null terminator. Signed-off-by: Alexander Shishkin <virtuoso@slind.org> Acked-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Ladislav Michl <ladis@linux-mips.org> Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-11-11OMAP3: PM debug: allow runtime toggle of PM featuresKevin Hilman1-2/+0
Allow enable/disable of low-power states during idle. To enable low-power idle: echo 1 > /debug/pm_debug/sleep_while_idle to disable: echo 0 > /debug/pm_debug/sleep_while_idle Also allow enable/disable of OFF-mode. To enable: echo 1 > /debug/pm_debug/enable_off_mode to disable: echo 0 > /debug/pm_debug/enable_off_mode Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-10Merge branch '7xx-iosplit-plat' with omap-fixesTony Lindgren1-8/+14
2009-10-22omap4: Fix UART4 platform data on omap4Santosh Shilimkar1-10/+0
This patch removes the unnecessary UART4 platform which is under data is wrong because of this There is a separate platform structure for UART4 Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Reviewed-By: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-10-20omap: headers: Move remaining headers from include/mach to include/platTony Lindgren1-4/+4
Move the remaining headers under plat-omap/include/mach to plat-omap/include/plat. Also search and replace the files using these headers to include using the right path. This was done with: #!/bin/bash mach_dir_old="arch/arm/plat-omap/include/mach" plat_dir_new="arch/arm/plat-omap/include/plat" headers=$(cd $mach_dir_old && ls *.h) omap_dirs="arch/arm/*omap*/ \ drivers/video/omap \ sound/soc/omap" other_files="drivers/leds/leds-ams-delta.c \ drivers/mfd/menelaus.c \ drivers/mfd/twl4030-core.c \ drivers/mtd/nand/ams-delta.c" for header in $headers; do old="#include <mach\/$header" new="#include <plat\/$header" for dir in $omap_dirs; do find $dir -type f -name \*.[chS] | \ xargs sed -i "s/$old/$new/" done find drivers/ -type f -name \*omap*.[chS] | \ xargs sed -i "s/$old/$new/" for file in $other_files; do sed -i "s/$old/$new/" $file done done for header in $(ls $mach_dir_old/*.h); do git mv $header $plat_dir_new/ done Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-10-16omap: Change low-level serial init to use ioremapTony Lindgren1-4/+10
Change low-level serial init to use ioremap Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-09-24omap: Fix 44xx compileTony Lindgren1-1/+1
Looks like these patches were not tested that well.. Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-09-24omap: Fix compile for arch/arm/mach-omap2Tony Lindgren1-2/+2
Patch 941132606c7611246d2034cb7b01f9270c2d1ede split IO_ADDRESS into OMAP1_IO_ADDRESS and OMAP2_IO_ADDRESS except for the omap4 code to avoid merge conflicts with the omap4 code that was queued earlier. Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-09-18Merge branch 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6Linus Torvalds1-19/+48
* 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6: (47 commits) OMAP clock: use debugfs_remove_recursive() for rewinding OMAP2/3/4 core: create omap_device layer OMAP: omap_hwmod: call omap_hwmod init at boot; create interconnects OMAP2/3/4: create omap_hwmod layer OMAP2/3 board-*.c files: read bootloader configuration earlier OMAP2/3/4 PRCM: add module IDLEST wait code OMAP2/3 PM: create the OMAP PM interface and add a default OMAP PM no-op layer OMAP3 clock: remove superfluous calls to omap2_init_clk_clkdm OMAP clock: associate MPU clocks with the mpu_clkdm OMAP3 clock: Fixed processing of bootarg 'mpurate' OMAP: SDRC: Add several new register definitions OMAP: powerdomain: Fix overflow when doing powerdomain deps lookups. OMAP: PM: Added suspend target state control to debugfs for OMAP3 OMAP: PM debug: Add PRCM register dump support OMAP: PM debug: make powerdomains use PM-debug counters OMAP: PM: Add pm-debug counters OMAP: PM: Add closures to clkdm_for_each and pwrdm_for_each. OMAP: PM: Hook into PM counters OMAP: PM counter infrastructure. OMAP3: PM: fix lockdep warning caused by omap3_pm_init ...
2009-09-03Merge branch '2_6_32_for_next' of git://git.pwsan.com/linux-2.6 into for-nextTony Lindgren1-1/+13
2009-09-03OMAP2/3 board-*.c files: read bootloader configuration earlierPaul Walmsley1-1/+13
Most board-*.c files read configuration data from the bootloader in their .init_machine() function. This needs to happen earlier, at some point before omap2_init_common_hw() is called. This is because a future patch will use the bootloader serial console port information to enable the UART clocks earlier, immediately after omap2_clk_init(). This is in turn necessary since otherwise clock tree usecounts on clocks like dpll4_m2x2_ck will be bogus, which can cause the currently-active console UART clock to be disabled during boot. Signed-off-by: Paul Walmsley <paul@pwsan.com>
2009-09-02ARM: OMAP4: Bypass the clock check.Santosh Shilimkar1-2/+5
Second reason of OMAP4 boot failure on 2.6.31.rc6, the UART platform data is not getting registered to kernel. Registration was failing because of clock check failure in omap_serial_init(). Below patch fix the same. OMAP4 clock framework patches are still getting discussed on mailing list so till then we need this. Signed-off-by: Syed Rafiuddin <rafiuddin.syed@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-09-02ARM: OMAP4: Fix NULL pointer dereference crash.Santosh Shilimkar1-0/+26
After the patch series "[PATCH 00/14] OMAP PM fixes for .31-rc" merge in 2.6.31-rc5, the kernel crashed during boot on OMAP4430. This patch fixes it by adding UART4 support and related code. Without this patch omap_serial_init() would produce " NULL pointer dereference" and kernel crashes in the bootup on OMAP4430 platform. Some more info on the merge issue can be found here. More info- http://lkml.org/lkml/2009/8/20/192 Note: While merging this patch,"IO_ADDRESS" needs to be changed to "OMAP2_IO_ADDRESS" if the Tony's below series is already merged in. http://www.mail-archive.com/linux-omap@vger.kernel.org/msg15072.html Signed-off-by: Syed Rafiuddin <rafiuddin.syed@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-08-28OMAP2/3: Pass irqflags to 8250 driverVikram Pandita1-1/+1
Pass irqflags to 8250 driver with platform_data. At least Zoom2 has IRQF_TRIGGER_RISING requirement for the 8250 GPIO irq. This patch is dependent on 8250 driver changes getting accepted upstream: http://git.kernel.org/?p=linux/kernel/git/sfr/linux-next.git;a=commit;h=7053133124d5cdf207c1168c7a0c582a18e12ea7 Signed-off-by: Vikram Pandita <vikram.pandita@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-08-28OMAP: UART: drop OMAP_TAG_UART, enable all UARTs, auto-disabled on idleKalle Valo1-12/+0
OMAP tags are deprecrated so drop them. Drop UART config data which decides which UARTs to enable during boot. This is no longer necessary since serial core code disables clocks after inactivity. Background: with new UART idle code, all on-chip UARTs are idled using a configurable inactivity timer (default 5 seconds.) After the inactivity timer, UART clocks are disabled automatically. Signed-off-by: Kalle Valo <kalle.valo@iki.fi> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-08-28OMAP: Remove OMAP_IO_ADDRESS, use OMAP1_IO_ADDRESS and OMAP2_IO_ADDRESS insteadTony Lindgren1-3/+3
Search and replace OMAP_IO_ADDRESS with OMAP1_IO_ADDRESS and OMAP2_IO_ADDRESS, and convert omap_read/write into a functions instead of a macros. Also rename OMAP_MPUIO_VBASE to OMAP1_MPUIO_VBASE. In the long run, most code should use ioremap + __raw_read/write instead. Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-08-05Merge branch 'pm-upstream/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm into devel-stableRussell King1-63/+134
2009-08-05OMAP2/3/4: UART: allow in-order port traversalKevin Hilman1-1/+1
Use list_add_tail() when adding discovered UART ports. This is so traversal using list_for_each_entry() will traverse the list in the order they were found. Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-08-05OMAP2/3/4: UART: Allow per-UART disabling wakeup for serial portsKevin Hilman1-58/+116
This patch causes the OMAP uarts to honor the sysfs power/wakeup file for IOPAD wakeups. Before the OMAP was always woken up from off mode on a rs232 signal change. This patch also creates a different platform device for each serial port so that the wakeup properties can be control per port. By default, IOPAD wakeups are enabled for each UART. To disable, # echo disabled > /sys/devices/platform/serial8250.0/power/wakeup Where serial8250.0 can be replaced by .1, or .2 to control the other ports. Original idea and original patch from Russ Dill <russ.dill@gmail.com> Cc: Russ Dill <russ.dill@gmail.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-08-05OMAP3: Fixed crash bug with serial + suspendTero Kristo1-0/+14
It was possible for an unhandled interrupt to occur if there was incoming serial traffic during wakeup from suspend. This was caused by the code in arch-arm/mach-omap2/serial.c keeping interrupt enabled all the time, but not acking its interrupts. Applies on top of PM branch. Use the PM begin/end hooks to ensure that the "serial idle" interrupts are disabled during the suspend path. Also, since begin/end hooks are now used, use the suspend_state that is passed in the begin hook instead of the enter hook as per the platform_suspend_ops docs. Signed-off-by: Tero Kristo <tero.kristo@nokia.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-08-05OMAP4: UART: cleanup special case IRQ handlingKevin Hilman1-4/+3
Streamline the OMAP4 special IRQ assignments by putting inside normal init loop instead of having a separate loop. Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-07-28ARM: OMAP4: Add UART4 supportSyed Rafiuddin1-0/+10
This patch adds UART4 support on OMAP4430 development platform. Signed-off-by: Syed Rafiuddin <rafiuddin.syed@ti.com>
2009-05-28Merge branch 'omap4' into for-nextTony Lindgren1-0/+7
2009-05-28Merge branch 'omap3-upstream' into for-nextTony Lindgren1-19/+14
Conflicts: arch/arm/mach-omap2/serial.c
2009-05-28ARM: OMAP4: Add minimal support for omap4Santosh Shilimkar1-0/+7
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 <santosh.shilimkar@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-05-28ARM: OMAP2/3: Serial: Remove arch_initcall dependencyVikram Pandita1-13/+9
Move platform_device_register() for serial device to omap_serial_init() There is no need to have arch_initcall() dependency in serial as already board files call the function omap_serial_init() Signed-off-by: Vikram Pandita <vikram.pandita@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-05-28OMAP: UART: Add sysfs interface for adjusting UART sleep timeoutJouni Hogander1-4/+51
This patch makes it possible to change uart sleep timeout. New sysfs entry is added (/sys/devices/platform/serial8250.<uart>/sleep_timeout) Writing zero will disable the timeout feature and prevent UART clocks from being disabled. Also default timeout is increased to 5 second to make serial console more usable. Original patch was written by Tero Kristo. Cc: Tero Kristo <Tero.Kristo@nokia.com> Signed-off-by: Jouni Hogander <jouni.hogander@nokia.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-05-28OMAP3: PM: UART: disable clocks when idle and off-mode supportKevin Hilman1-24/+366
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 <tero.kristo@nokia.com> Cc: Jouni Hogander <jouni.hogander@nokia.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2008-10-14Merge branch 'omap-all' into develRussell King1-68/+48
Conflicts: arch/arm/mach-omap2/gpmc.c arch/arm/mach-omap2/irq.c
2008-10-06ARM: OMAP2 Provide function to enable/disable uart clocksJouni Hogander1-60/+40
This patch adds common function to enable/disable omap2/3 uart clocks. Enabled uarts are passed by bootloader in atags and clocks for these enabled uarts are touched. Signed-off-by: Jouni Hogander <jouni.hogander@nokia.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2008-09-06[ARM] Convert asm/io.h to linux/io.hRussell King1-2/+1
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-05[ARM] omap: fix lots of 'Using plain integer as NULL pointer'Russell King1-1/+1
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-05[ARM] omap: Fix IO_ADDRESS() macrosRussell King1-7/+7
OMAP1_IO_ADDRESS(), OMAP2_IO_ADDRESS() and IO_ADDRESS() returns cookies for use with __raw_{read|write}* for accessing registers. Therefore, these macros should return (void __iomem *) cookies, not integer values. Doing this improves typechecking, and means we can find those places where, eg, DMA controllers are incorrectly given virtual addresses to DMA to, or physical addresses are thrown through a virtual to physical address translation. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-08-07[ARM] Move include/asm-arm/arch-* to arch/arm/*/include/machRussell King1-2/+2
This just leaves include/asm-arm/plat-* to deal with. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-08-22ARM: OMAP: Enable serial idling and wakeup featuresJuha Yrjola1-1/+1
Enable serial idling and wakeup features Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2006-10-03fix file specification in commentsUwe Zeisberger1-1/+1
Many files include the filename at the beginning, serveral used a wrong one. Signed-off-by: Uwe Zeisberger <Uwe_Zeisberger@digi.com> Signed-off-by: Adrian Bunk <bunk@stusta.de>
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