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2008-11-30[ARM] Add a common typesafe __io implementationRussell King
As Al did for Versatile in 2ad4f86b60b649fd7428265c08d73a3bd360c81b, add a typesafe __io implementation for platforms to use. Convert platforms to use this new simple typesafe implementation. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-29[ARM] Hide ISA DMA API when ISA_DMA_API is unsetRussell King
When ISA_DMA_API is unset, we're not implementing the ISA DMA API, so there's no point in publishing the prototypes via asm/dma.h, nor including the machine dependent parts of that API. This allows us to remove a lot of mach/dma.h files which don't contain any useful code. Unfortunately though, some platforms put their own private non-ISA definitions into mach/dma.h, so we leave these behind and fix the appropriate #include statments. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-28[ARM] imx: avoid polluting the kernel's namespaceRussell King
Avoid unnecessarily pollution of the kernel's namespace by avoiding mach/hardware.h in mach/io.h. Include this header file where necessary. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-28[ARM] remove a common set of __virt_to_bus definitionsNicolas Pitre
Let's provide an overridable default instead of having every machine class define __virt_to_bus and __bus_to_virt to the same thing. What most platforms are using is bus_addr == phys_addr so such is the default. One exception is ebsa110 which has no DMA what so ever, so the actual definition is not important except only for proper compilation. Also added a comment about the special footbridge bus translation. Let's also remove comments alluding to set_dma_addr which is not (and should not) be commonly used. Signed-off-by: Nicolas Pitre <nico@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-10-30[ARM] gpio_free might sleep, arm architectureUwe Kleine-König
According to the documentation gpio_free should only be called from task context only. To make this more explicit add a might sleep to all implementations. This patch changes the gpio_free implementations for the arm architecture. DaVinci is skipped on purpose to simplify the merge process for patches switching it over to use gpiolib as per request by David Brownell. Signed-off-by: Uwe Kleine-König <ukleinek@informatik.uni-freiburg.de> Cc: David Brownell <david-b@pacbell.net> Cc: Andrew Victor <linux@maxim.org.za> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-10-09Merge branch 'for-rmk' of ↵Russell King
git://pasiphae.extern.pengutronix.de/git/imx/linux-2.6.git Merge branch 'imx-devel' into devel
2008-10-09Merge branch 'pxa-all' into develRussell King
Conflicts: arch/arm/mach-pxa/Kconfig arch/arm/mach-pxa/corgi.c arch/arm/mach-pxa/include/mach/hardware.h arch/arm/mach-pxa/spitz.c
2008-10-09[ARM] 5298/1: Drop desc_handle_irq()Dmitry Baryshkov
desc_handle_irq() was declared as obsolete since long ago. Replace it with generic_handle_irq() Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-09i.MX: Add FIQ supportPaulius Zaleckas
Drivers which are going to use it will have to select it and use imx_set_irq_fiq() to set FIQ mode for this interrupt. Changes since V1: - removed '#ifdef CONFIG_FIQ' from irqs.h - renamed imx_set_irq_type() to imx_set_irq_fiq() - made irqt unsigned - fixed irq number check Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-09-06[ARM] Convert asm/io.h to linux/io.hRussell King
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 King
This just leaves include/asm-arm/plat-* to deal with. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-08-07[ARM] Remove asm/hardware.h, use asm/arch/hardware.h insteadRussell King
Remove includes of asm/hardware.h in addition to asm/arch/hardware.h. Then, since asm/hardware.h only exists to include asm/arch/hardware.h, update everything to directly include asm/arch/hardware.h and remove asm/hardware.h. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-07-28[ARM] i.MX: add missing clock functions exportsPaulius Zaleckas
Export missing Clock API symbols. Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-07-28[ARM] i.MX: remove set_imx_fb_info() exportPaulius Zaleckas
Remove not needed export and fix warning: WARNING: vmlinux.o(__ksymtab+0x400): Section mismatch in reference from the variable __ksymtab_set_imx_fb_info to the function .init.text:set_imx_fb_info() The symbol set_imx_fb_info is exported and annotated __init Fix this by removing the __init annotation of set_imx_fb_info or drop the export. Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-07-28[ARM] mx1ads: make mmc platform data available for modulesSascha Hauer
Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt> Acked-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-07-27[ARM] 5179/1: Replace obsolete IRQT_* and __IRQT_* values with IRQ_TYPE_*Dmitry Baryshkov
IRQT_* and __IRQT_* were obsoleted long ago by patch [3692/1]. Remove them completely. Sed script for the reference: s/__IRQT_RISEDGE/IRQ_TYPE_EDGE_RISING/g s/__IRQT_FALEDGE/IRQ_TYPE_EDGE_FALLING/g s/__IRQT_LOWLVL/IRQ_TYPE_LEVEL_LOW/g s/__IRQT_HIGHLVL/IRQ_TYPE_LEVEL_HIGH/g s/IRQT_RISING/IRQ_TYPE_EDGE_RISING/g s/IRQT_FALLING/IRQ_TYPE_EDGE_FALLING/g s/IRQT_BOTHEDGE/IRQ_TYPE_EDGE_BOTH/g s/IRQT_LOW/IRQ_TYPE_LEVEL_LOW/g s/IRQT_HIGH/IRQ_TYPE_LEVEL_HIGH/g s/IRQT_PROBE/IRQ_TYPE_PROBE/g s/IRQT_NOEDGE/IRQ_TYPE_NONE/g Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-07-10Merge branch 'imx' into develRussell King
Conflicts: arch/arm/mm/Kconfig
2008-07-05IMX: introduce clock APISascha Hauer
This patch introduces the clock API for i.MX and converts all in-Kernel drivers to use it. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-07-05IMX UART: remove statically initialized tablesSascha Hauer
This patch removes the statically initialized tables from the i.MX serial driver and makes the driver fully dependent on the information provided by the platform_device. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-07-03[ARM] 5122/1: imx_dma_request_by_prio simpilficationPaulius Zaleckas
imx_dma_request_by_prio can return channel number by itself. No need to supply variable address through parameters. Also converted all drivers using this function. Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-03-06[ARM] replace remaining __FUNCTION__ occurrencesHarvey Harrison
__FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-01-28Remove references to "make dep"Adrian Bunk
"make dep" is no longer required in kernel 2.6, but was still mentioned in some places. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2007-11-26[ARM] 4648/1: i.MX/MX1 ensure more complete AITC initializationPavel Pisa
The AITC code did not allow to start kernel, if bootloader manipulates with interrupt level mask. The change ensures, that NIMASK is initialized into correct state and that interrupts enable registers are cleared. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-10-12Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreqLinus Torvalds
* master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] Don't take semaphore in cpufreq_quick_get() [CPUFREQ] Support different families in fid/did to frequency conversion [CPUFREQ] cpufreq_stats: misc cpuinit section annotations [CPUFREQ] implement !CONFIG_CPU_FREQ stub for cpufreq_unregister_notifier() [CPUFREQ] mark hotplug notifier callback as __cpuinit [CPUFREQ] Only check for transition latency on problematic governors (kconfig fix) [CPUFREQ] allow ondemand and conservative cpufreq governors to be used as default [CPUFREQ] move policy's governor initialisation out of low-level drivers into cpufreq core [CPUFREQ] Longhaul - Add support for PM133 northbridge [CPUFREQ] x86: use num_online_nodes to get physical cpus numbers for
2007-10-04[CPUFREQ] move policy's governor initialisation out of low-level drivers ↵Thomas Renninger
into cpufreq core Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Bryan Wu <bryan.wu@analog.com> Cc: Andi Kleen <ak@suse.de> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Jones <davej@redhat.com>
2007-09-24arm: i.MX/MX1 SDHC implements SD cards read-only switch read-backPavel Pisa
The patch enables to define MMC host get_ro() method through platform data. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-30[ARM] 4561/1: i.MX/MX1 GPIO parenthes omission and input setup fixPavel Pisa
During GPIO testing on PiMX1 board there has been revealed problem with some pins input functions. The GIUS bit has to be set for inputs to work reliably too. It is surprising that input worked on some inputs with incorrect setup before. DR is not mandatory, but it ensures stable constant level on internal traces. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-08-23[ARM] 4552/1: i.MX/MX1 GPIO output setup fixPavel Pisa
The pins for GPIO should be provided as plain number build as (GPIO_PORTx + pin_number). But to setup the output GPIO_GIUS and GPIO_DR have to be specified in mode to route right value to the pin. This is a fix, it should go to 2.6.23 Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-07-21clockevents: fix resume logicThomas Gleixner
We need to make sure, that the clockevent devices are resumed, before the tick is resumed. The current resume logic does not guarantee this. Add CLOCK_EVT_MODE_RESUME and call the set mode functions of the clock event devices before resuming the tick / oneshot functionality. Fixup the existing users. Thanks to Nigel Cunningham for tracking down a long standing thinko, which affected the jinxed VAIO. [akpm@linux-foundation.org: xen build fix] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: john stultz <johnstul@us.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-12[ARM] 4374/3: i.MX/MX1 clock event sourcePavel Pisa
Support clock event source based on i.MX general purpose timer in free running timer mode. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-07-12[ARM] 4373/1: i.MX/MX1 GPIO support implementationPavel Pisa
Support for generic input output for MX1 family. The implementation prevents allocation of one pin by two users, but does not store pointer to the user description permanently, because this solution would have bigger memory overhead. The simple way to integrate code with per BSP pins setup and allocation is required else all GPIO registration checking is useless. The function imx_gpio_setup_multiple_pins() can be used for this purpose in future. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-05-30[ARM] Fix some section mismatch warningsRussell King
The following patch fixes these section mismatch warnings: WARNING: arch/arm/mach-at91/built-in.o(.text+0xdf4): Section mismatch: reference to .init.data:dk_nand_partition (between 'nand_partitions' and 'at91_leds_event') WARNING: arch/arm/mach-at91/built-in.o(.text+0xbdc): Section mismatch: reference to .init.data:ek_nand_partition (after 'nand_partitions') WARNING: arch/arm/mach-at91/built-in.o(.text+0xbdc): Section mismatch: reference to .init.data:ek_nand_partition (between 'nand_partitions' and 'ads7843_pendown_state') WARNING: arch/arm/mach-at91/built-in.o(.text+0xbdc): Section mismatch: reference to .init.data:ek_nand_partition (after 'nand_partitions') WARNING: arch/arm/mach-at91/built-in.o(.text+0xc28): Section mismatch: reference to .init.data:kb9202_nand_partition (after 'nand_partitions') WARNING: arch/arm/mach-footbridge/built-in.o(.text+0xaa4): Section mismatch: reference to .init.data:cats_pci (between 'cats_pci_init' and 'ebsa285_leds_event')WARNING: arch/arm/mach-ixp2000/built-in.o(.text+0xb54): Section mismatch: reference to .init.text:ixp2000_init_irq (between 'ixdp2x00_init_irq' and 'ixdp2x00_irq_handler') WARNING: arch/arm/mach-ixp23xx/built-in.o(.text+0x670): Section mismatch: reference to .init.text:ixp23xx_pci_common_init (between 'ixp23xx_pci_slave_init' and 'ixp23xx_pci_scan_bus') WARNING: arch/arm/mach-ixp23xx/built-in.o(.text+0x890): Section mismatch: reference to .init.text:ixp23xx_init_irq (between 'ixdp2351_init_irq' and 'roadrunner_pci_preinit') WARNING: arch/arm/mach-ixp23xx/built-in.o(.text+0x9a8): Section mismatch: reference to .init.text:ixp23xx_pci_preinit (after 'roadrunner_pci_preinit') WARNING: arch/arm/mach-imx/built-in.o(__ksymtab+0x80): Section mismatch: reference to .init.text:imx_set_mmc_info (between '__ksymtab_imx_set_mmc_info' and '__ksymtab_set_imx_fb_info') WARNING: arch/arm/mach-imx/built-in.o(__ksymtab+0x88): Section mismatch: reference to .init.text:set_imx_fb_info (after '__ksymtab_set_imx_fb_info') WARNING: arch/arm/mach-sa1100/built-in.o(.text+0x1930): Section mismatch: reference to .init.data:neponset_port_fns (between 'neponset_probe' and 'assabet_leds_event') WARNING: drivers/built-in.o(.text+0x3f100): Section mismatch: reference to .init.text:ps2_clear_input (between 'ps2_probe' and 'ps2_cmd_aborted') WARNING: drivers/built-in.o(.text+0x3f1c8): Section mismatch: reference to .init.text:ps2_clear_input (between 'ps2_probe' and 'ps2_cmd_aborted') WARNING: drivers/built-in.o(.text+0x4f988): Section mismatch: reference to .init.text:ps2_clear_input (between 'ps2_probe' and 'ps2_cmd_aborted') WARNING: drivers/built-in.o(.text+0x4fa50): Section mismatch: reference to .init.text:ps2_clear_input (between 'ps2_probe' and 'ps2_cmd_aborted') Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Acked-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-05-20[ARM] spelling fixesSimon Arlott
Spelling fixes in arch/arm/. Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-05-08Add IRQF_IRQPOLL flag on armBernhard Walle
Add IRQF_IRQPOLL for each timer interrupt. Signed-off-by: Bernhard Walle <bwalle@suse.de> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-12[ARM] 4255/1: i.MX/MX1 Correct MPU PLL reference clock value.Pavel Pisa
Only System PLL clock source is selectable by CSCR_SYSTEM_SEL bit. MPU PLL is driven by 512*CLK32 for each case. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-03-12[ARM] 4254/1: i.MX/MX1 CPU Frequency scaling honor boot loader set BCLK_DIV.Pavel Pisa
The minimal bus clock prescaler should be kept at value selected by the board / boot loader designer. Switching frequency above startup limit could lead to the external memory/devices misbehave. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-02-16[PATCH] clocksource: fixup is_continous changes on ARMThomas Gleixner
Fixup the is_contionous replacement by a flag field. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Russell King <rmk@arm.linux.org.uk> Cc: john stultz <johnstul@us.ibm.com> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-01-24[ARM] 4092/1: i.MX/MX1 CPU Frequency scaling latency definitionPavel Pisa
The transition latency has to be defined and reasonably small to allow on-demand and conservative governors. The value has been defined according to manual. The imx_set_target() protected against seen out of range requests now. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-12-13[ARM] 3992/1: i.MX/MX1 CPU Frequency scaling supportPavel Pisa
Support to change MX1 CPU frequency at runtime. Tested on PiKRON's PiMX1 board and seems to be fully stable up to 200 MHz end even as low as 8 MHz. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-12-07[ARM] 3991/1: i.MX/MX1 high resolution time sourcePavel Pisa
Enhanced resolution for time measurement functions. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-12-07[ARM] 3990/1: i.MX/MX1 more precise PLL decodePavel Pisa
The future high resolution support inclusion utilizes imx_decode_pll() in timer base frequency computation. This use requires more precise computation without discarding 10 bits by shifting left. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-11-30[ARM] Remove compatibility layer for ARM irqsRussell King
set_irq_chipdata -> set_irq_chip_data get_irq_chipdata -> get_irq_chip_data do_level_IRQ -> handle_level_irq do_edge_IRQ -> handle_edge_irq do_simple_IRQ -> handle_simple_irq irqdesc -> irq_desc irqchip -> irq_chip Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-10-06Initial blind fixup for arm for irq changesLinus Torvalds
Untested, but this should fix up the bulk of the totally mechanical issues, and should make the actual detail fixing easier. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-03fix file specification in commentsUwe Zeisberger
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>
2006-08-01[ARM] 3739/1: genirq updates: irq_chip, add and use irq_chip.nameDavid Brownell
Patch from David Brownell ARM genirq cleanups/updates: - Start switching platforms to newer APIs * use "irq_chip" name, not "irqchip" * providing irq_chip.name - Show irq_chip.name in /proc/interrupts, like on x86. This update a bit more than half of the ARM code. The irq_chip.name values were chosen to match docs (if I have them) or be otherwise obvious ("FPGA", "CPLD", or matching the code). Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-07-02[PATCH] ARM: fixup irqflags breakage after ARM genirq mergeThomas Gleixner
The irgflags consolidation did conflict with the ARM to generic IRQ conversion and was not applied for ARM. Fix it up. Use the new IRQF_ constants and remove the SA_INTERRUPT define Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-01[ARM] 3691/1: ARM: Convert imx to generic irq handlingThomas Gleixner
Patch from Thomas Gleixner From: Thomas Gleixner <tglx@linutronix.de> Fixup the conversion to generic irq subsystem. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-06-30Remove obsolete #include <linux/config.h>Jörn Engel
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-06-22[ARM] 3601/1: i.MX/MX1 DMA error handling for signaled channels onlyPavel Pisa
Patch from Pavel Pisa There has been bug, that dma_err_handler() touches even channels not signaling error condition. Problem noticed by Andrea Paterniani. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-06-08[ARM] 3546/1: PATCH: subtle lost interrupts bug on i.MXMatt Reimer
Patch from Matt Reimer There is a subtle bug in the GPIO interrupt status register handling in arch/arm/mach-imx/irq.c:imx_gpio_ack_irq(). The documentation states that a 1 should be written to the relevant bit to acknowledge a GPIO interrupt, but that is not what the code does. The problem is that the |= writes back 1s for all the *other* interrupts represented in the register, so interrupts could get lost. For example, if interrupts are pending for GPIO B10 and B12, ISR_B would have the value 0x00001400. Then when the interrupt code handles GPIO B10, it eventually calls imx_gpio_ack_irq(IRQ_GPIOB(10)), which effectively does this: ISR_B |= 1 << 10; with the result that (0x00001400 | 0x00000400) is written, clearing the interrupt status bits for *both* GPIO B10 and B12. The fix is to write 1s only for the interrupts we want to clear. The same problem seems to be occurring in the DMA code; this patch does not address those issues. Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Matt Reimer <mreimer@vpop.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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