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8808b64daa
linux/drivers/gpio
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Valentine Barshak 8808b64daa gpio: rcar: Fix level interrupt handling 
According to the manual, if a port is set for level detection using
the corresponding bit in the edge/level select register and an external
level interrupt signal is asserted, the corresponding bit in INTDT
does not use the FF to hold the input.
Thus, writing 1 to the corresponding bits in INTCLR cannot clear the
corresponding bits in the INTDT register. Instead, when an external
input signal is stopped, the corresponding bit in INTDT is cleared
automatically.

Since the INTDT bit cannot be cleared for the level interrupts until
the interrupt signal is stopped, we end up with the infinite loop
when using deferred (threaded) IRQ handling.

Since a deferred interrupt is disabled by the low-level handler and
re-enabled only when the deferred handler is completed, Fix the issue
by dropping disabled interrupts from the pending mask as suggested by
Laurent Pinchart <laurent.pinchart@ideasonboard.com>

Changes in V2:
* Drop disabled interrupts from pending mask altogether instead of
  dropping level interrupts one by one once they get handled.

Signed-off-by: Valentine Barshak <valentine.barshak@cogentembedded.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-12-12 20:53:05 +01:00
..
devres.c gpiolib: devres: add missing headers 2013-10-29 18:26:14 -07:00
gpio-74x164.c gpio: gpio-74x164: Remove redundant of_match_ptr 2013-09-23 12:52:21 +02:00
gpio-adnp.c gpio: adnp: rename "virq" to "child_irq" 2013-10-16 09:59:10 +02:00
gpio-adp5520.c gpio: use dev_get_platdata() 2013-08-16 15:24:35 +02:00
gpio-adp5588.c gpio: use dev_get_platdata() 2013-08-16 15:24:35 +02:00
gpio-amd8111.c gpio: add a driver for GPIO pins found on AMD-8111 south bridge chips 2012-07-12 13:40:13 +02:00
gpio-arizona.c gpio: arizona: Use the of_node from the Arizona device 2013-10-02 12:50:35 +02:00
gpio-bcm-kona.c gpio: bcm281xx: Fix return value of bcm_kona_gpio_get() 2013-11-27 15:01:03 +01:00
gpio-bt8xx.c gpio: bt8xx: remove unnecessary pci_set_drvdata() 2013-09-20 20:43:09 +02:00
gpio-clps711x.c gpio: clps711x: Remove redundant of_match_ptr 2013-10-02 12:43:25 +02:00
gpio-cs5535.c gpio: remove use of __devexit 2012-11-28 11:39:59 -08:00
gpio-da9052.c gpio: use dev_get_platdata() 2013-08-16 15:24:35 +02:00
gpio-da9055.c gpio: use dev_get_platdata() 2013-08-16 15:24:35 +02:00
gpio-davinci.c gpio: davinci: move to platform device 2013-09-24 10:31:51 +05:30
gpio-em.c gpio: em: drop references to "virtual" IRQ 2013-10-16 09:59:41 +02:00
gpio-ep93xx.c gpio: ep93xx: get rid of bogus __raw* accessors 2013-10-16 09:59:54 +02:00
gpio-f7188x.c gpio: add GPIO support for F71882FG and F71889F 2013-08-30 09:25:52 +02:00
gpio-ge.c powerpc/85xx: Board support for GE IMP3A 2012-03-16 11:15:48 -05:00
gpio-generic.c GPIO: gpio-generic: remove kfree() from bgpio_remove call 2013-04-11 19:33:54 +02:00
gpio-grgpio.c gpio: grgpio: Staticize local symbols 2013-06-19 21:40:38 +02:00
gpio-ich.c gpio: use dev_get_platdata() 2013-08-16 15:24:35 +02:00
gpio-intel-mid.c gpio: intel-mid: drop references to "virtual" IRQ 2013-10-16 09:59:51 +02:00
gpio-iop.c ARM: plat-iop: pass physical base for GPIO 2013-09-20 23:05:19 +02:00
gpio-it8761e.c
gpio-janz-ttl.c gpio: use dev_get_platdata() 2013-08-16 15:24:35 +02:00
gpio-kempld.c gpio: Fix bit masking in Kontron PLD GPIO driver 2013-08-16 17:56:53 +02:00
gpio-ks8695.c
gpio-lpc32xx.c gpio: lpc32xx: Include linux/of.h header 2013-10-16 13:09:10 +02:00
gpio-lynxpoint.c Linux 3.12-rc6 2013-10-19 23:24:03 +02:00
gpio-max730x.c gpio: use dev_get_platdata() 2013-08-16 15:24:35 +02:00
gpio-max732x.c gpio: use dev_get_platdata() 2013-08-16 15:24:35 +02:00
gpio-max7300.c gpio: max7300: use devm_kzalloc() 2013-03-27 16:05:11 +01:00
gpio-max7301.c gpio: max7301: Reverting "Do not force SPI speed when using OF Platform" 2013-08-23 19:44:28 +02:00
gpio-mc9s08dz60.c gpio: mc9s08dz60: Use devm_kzalloc API 2012-09-01 01:02:27 +02:00
gpio-mc33880.c gpio: gpio-mc33880: Remove redundant spi_set_drvdata 2013-09-23 12:53:13 +02:00
gpio-mcp23s08.c gpio: mcp23s08: rename the device tree property 2013-08-30 09:25:52 +02:00
gpio-ml-ioh.c gpio-ml-ioh: fix error return code in ioh_gpio_probe() 2013-05-30 19:39:20 +02:00
gpio-mm-lantiq.c GPIO: MIPS: lantiq: convert gpio-mm-lantiq to OF and of_mm_gpio 2012-05-21 14:31:53 +01:00
gpio-mpc8xxx.c powerpc/gpio: Fix the wrong GPIO input data on MPC8572/MPC8536 2013-12-03 13:10:48 +01:00
gpio-mpc5200.c gpio: remove use of __devinit 2012-11-28 11:39:33 -08:00
gpio-msic.c gpio: use dev_get_platdata() 2013-08-16 15:24:35 +02:00
gpio-msm-v1.c gpio_msm: Fix build error due to missing err.h 2013-07-31 00:34:31 +02:00
gpio-msm-v2.c gpio: msm: Fix irq mask/unmask by writing bits instead of numbers 2013-12-12 19:59:57 +01:00
gpio-mvebu.c gpio: mvebu: make mvchip->irqbase signed for error handling 2013-11-25 09:03:12 +01:00
gpio-mxc.c gpio/mxc: add chained_irq_enter/exit() to mx2_gpio_irq_handler 2013-08-16 15:19:11 +02:00
gpio-mxs.c gpio: gpio-mxs: Remove unneeded dt checks 2013-11-06 10:51:24 +01:00
gpio-octeon.c gpio MIPS/OCTEON: Add a driver for OCTEON's on-chip GPIO pins. 2013-08-26 15:33:40 +02:00
gpio-omap.c gpio/omap: use gpiolib API to mark a GPIO used as an IRQ 2013-10-16 10:06:00 +02:00
gpio-palmas.c gpio: palmas: add support for TPS80036 2013-09-19 15:31:48 +02:00
gpio-pca953x.c gpio: pca953x: Don't flip bits on PCA957x GPIO expanders when probing them. 2013-09-23 12:57:11 +02:00
gpio-pcf857x.c gpio: pcf857x: Add OF support 2013-09-23 20:00:01 +02:00
gpio-pch.c gpio: Don't override the error code in probe error handling 2013-05-20 20:27:30 +02:00
gpio-pl061.c gpio: pl061: move irqdomain initialization 2013-11-27 14:13:50 +01:00
gpio-pxa.c gpio: pxa: remove dead code 2013-07-21 18:14:20 +02:00
gpio-rc5t583.c gpio: remove use of __devexit 2012-11-28 11:39:59 -08:00
gpio-rcar.c gpio: rcar: Fix level interrupt handling 2013-12-12 20:53:05 +01:00
gpio-rdc321x.c gpio: use dev_get_platdata() 2013-08-16 15:24:35 +02:00
gpio-sa1100.c ARM: 7841/1: sa1100: remove complex GPIO interface 2013-10-29 11:01:02 +00:00
gpio-samsung.c ARM: SoC DT updates for 3.13 2013-11-11 17:34:56 +09:00
gpio-sch.c gpio: Don't override the error code in probe error handling 2013-05-20 20:27:30 +02:00
gpio-sodaville.c gpio: remove use of __devinit 2012-11-28 11:39:33 -08:00
gpio-spear-spics.c drivers/gpio: simplify use of devm_ioremap_resource 2013-08-16 17:16:31 +02:00
gpio-sta2x11.c gpio: use dev_get_platdata() 2013-08-16 15:24:35 +02:00
gpio-stmpe.c gpio: stmpe: drop references to "virtual" IRQ, fix bug 2013-10-16 09:59:53 +02:00
gpio-stp-xway.c gpio: gpio-stp-xway.c: fix checkpatch error 2013-03-27 16:05:16 +01:00
gpio-sx150x.c gpio: use dev_get_platdata() 2013-08-16 15:24:35 +02:00
gpio-tb10x.c gpio: tb10x: Set output value before setting direction to output 2013-11-25 09:02:29 +01:00
gpio-tc3589x.c gpio: tc3589x: drop references to "virtual" IRQ 2013-10-11 19:06:12 +02:00
gpio-tegra.c gpio: tegra: use new gpio_lock_as_irq() API 2013-10-17 10:51:53 +02:00
gpio-timberdale.c gpio: use dev_get_platdata() 2013-08-16 15:24:35 +02:00
gpio-tnetv107x.c ARM: davinci: gpio: use gpiolib API instead of inline functions 2013-09-25 04:16:37 +05:30
gpio-tps6586x.c This is the MFD patch set for the 3.8 merge window. 2012-12-16 18:55:20 -08:00
gpio-tps65910.c gpio: gpio-tps65910.c: fix checkpatch error 2013-03-27 16:05:18 +01:00
gpio-tps65912.c gpio: use dev_get_platdata() 2013-08-16 15:24:35 +02:00
gpio-ts5500.c gpio: use dev_get_platdata() 2013-08-16 15:24:35 +02:00
gpio-twl4030.c gpio: twl4030: Fix regression for twl gpio LED output 2013-12-10 13:17:27 +01:00
gpio-twl6040.c GPIO: gpio-twl6040: Remove support for legacy (pdata) mode 2013-07-20 21:38:18 +02:00
gpio-tz1090-pdc.c gpio-tz1090-pdc: add TZ1090 PDC gpio driver 2013-07-20 19:03:48 +02:00
gpio-tz1090.c gpio-tz1090: convert to use generic irqchip 2013-07-20 19:05:15 +02:00
gpio-ucb1400.c gpio: ucb1400: Add MODULE_ALIAS 2013-11-25 09:03:13 +01:00
gpio-viperboard.c gpio: Don't override the error code in probe error handling 2013-05-20 20:27:30 +02:00
gpio-vr41xx.c gpio: remove use of __devexit 2012-11-28 11:39:59 -08:00
gpio-vx855.c gpio: vx855: remove unnecessary platform_set_drvdata() 2013-05-30 19:20:21 +02:00
gpio-wm831x.c gpio: use dev_get_platdata() 2013-08-16 15:24:35 +02:00
gpio-wm8350.c gpio: use dev_get_platdata() 2013-08-16 15:24:35 +02:00
gpio-wm8994.c gpio: use dev_get_platdata() 2013-08-16 15:24:35 +02:00
gpio-xilinx.c GPIO: xilinx: Use BIT macro 2013-06-17 07:47:33 +02:00
gpiolib-acpi.c gpiolib / ACPI: allow passing GPIOF_ACTIVE_LOW for GpioInt resources 2013-10-19 23:32:14 +02:00
gpiolib-of.c GPIO bulk changes for the v3.13 development cycle 2013-11-12 15:50:46 +09:00
gpiolib.c gpiolib: change a warning to debug message when failing to get gpio 2013-12-03 13:10:48 +01:00
Kconfig GPIO bulk changes for the v3.13 development cycle 2013-11-12 15:50:46 +09:00
Makefile GPIO bulk changes for the v3.13 development cycle 2013-11-12 15:50:46 +09:00