linux/drivers/mfd, branch v3.0.56

ARM: pxa: remove irq_to_gpio from ezx-pcap driver

2012-08-15T19:04:30Z

commit 59ee93a528b94ef4e81a08db252b0326feff171f upstream. The irq_to_gpio function was removed from the pxa platform in linux-3.2, and this driver has been broken since. There is actually no in-tree user of this driver that adds this platform device, but the driver can and does get enabled on some platforms. Without this patch, building ezx_defconfig results in: drivers/mfd/ezx-pcap.c: In function 'pcap_isr_work': drivers/mfd/ezx-pcap.c:205:2: error: implicit declaration of function 'irq_to_gpio' [-Werror=implicit-function-declaration] Signed-off-by: Arnd Bergmann Acked-by: Haojian Zhuang Cc: Samuel Ortiz Cc: Daniel Ribeiro Signed-off-by: Greg Kroah-Hartman

random: remove rand_initialize_irq()

2012-08-15T19:04:28Z

commit c5857ccf293968348e5eb4ebedc68074de3dcda6 upstream. With the new interrupt sampling system, we are no longer using the timer_rand_state structure in the irq descriptor, so we can stop initializing it now. [ Merged in fixes from Sedat to find some last missing references to rand_initialize_irq() ] Signed-off-by: "Theodore Ts'o" Signed-off-by: Sedat Dilek Signed-off-by: Greg Kroah-Hartman

mfd: wm831x: Feed the device UUID into device_add_randomness()

2012-08-15T19:04:28Z

commit 27130f0cc3ab97560384da437e4621fc4e94f21c upstream. wm831x devices contain a unique ID value. Feed this into the newly added device_add_randomness() to add some per device seed data to the pool. Signed-off-by: Mark Brown Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman

random: make 'add_interrupt_randomness()' do something sane

2012-08-15T19:04:12Z

commit 775f4b297b780601e61787b766f306ed3e1d23eb upstream. We've been moving away from add_interrupt_randomness() for various reasons: it's too expensive to do on every interrupt, and flooding the CPU with interrupts could theoretically cause bogus floods of entropy from a somewhat externally controllable source. This solves both problems by limiting the actual randomness addition to just once a second or after 64 interrupts, whicever comes first. During that time, the interrupt cycle data is buffered up in a per-cpu pool. Also, we make sure the the nonblocking pool used by urandom is initialized before we start feeding the normal input pool. This assures that /dev/urandom is returning unpredictable data as soon as possible. (Based on an original patch by Linus, but significantly modified by tytso.) Tested-by: Eric Wustrow Reported-by: Eric Wustrow Reported-by: Nadia Heninger Reported-by: Zakir Durumeric Reported-by: J. Alex Halderman Signed-off-by: Linus Torvalds Signed-off-by: "Theodore Ts'o" Signed-off-by: Greg Kroah-Hartman

mfd: Clear twl6030 IRQ status register only once

2012-04-13T15:14:08Z

commit 3f8349e6e98ba0455437724589072523865eae5e upstream. TWL6030 family of PMIC use a shadow interrupt status register while kernel processes the current interrupt event. However, any write(0 or 1) to register INT_STS_A, INT_STS_B or INT_STS_C clears all 3 interrupt status registers. Since clear of the interrupt is done on 32k clk, depending on I2C bus speed, we could in-adverently clear the status of a interrupt status pending on shadow register in the current implementation. This is due to the fact that multi-byte i2c write operation into three seperate status register could result in multiple load and clear of status and result in lost interrupts. Instead, doing a single byte write to INT_STS_A register with 0x0 will clear all three interrupt status registers without the related risk. Acked-by: Santosh Shilimkar Signed-off-by: Nishanth Menon Signed-off-by: Samuel Ortiz Signed-off-by: Greg Kroah-Hartman

mfd: Fix cs5535 section mismatch

2012-03-12T17:33:10Z

commit 97e43c983c721a47546e6db3b7711dcd912a6481 upstream. Silence following warnings: WARNING: drivers/mfd/cs5535-mfd.o(.data+0x20): Section mismatch in reference from the variable cs5535_mfd_drv to the function .devinit.text:cs5535_mfd_probe() The variable cs5535_mfd_drv references the function __devinit cs5535_mfd_probe() If the reference is valid then annotate the variable with __init* or __refdata (see linux/init.h) or name the variable: *driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console WARNING: drivers/mfd/cs5535-mfd.o(.data+0x28): Section mismatch in reference from the variable cs5535_mfd_drv to the function .devexit.text:cs5535_mfd_remove() The variable cs5535_mfd_drv references the function __devexit cs5535_mfd_remove() If the reference is valid then annotate the variable with __exit* (see linux/init.h) or name the variable: *driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console Rename the variable from *_drv to *_driver so modpost ignore the OK references to __devinit/__devexit functions. Signed-off-by: Christian Gmeiner Acked-by: Andres Salomon Signed-off-by: Samuel Ortiz Signed-off-by: Greg Kroah-Hartman

mfd: Fix ACPI conflict check

2012-03-12T17:32:48Z

commit 81b5482c32769abb6dfb979560dab2f952ba86fa upstream. The code is currently always checking the first resource of every device only (several times.) This has been broken since the ACPI check was added in February 2010 in commit 91fedede0338eb6203cdd618d8ece873fdb7c22c. Fix the check to run on each resource individually, once. Signed-off-by: Jean Delvare Signed-off-by: Samuel Ortiz Signed-off-by: Greg Kroah-Hartman

mfd: Turn on the twl4030-madc MADC clock

2012-01-06T22:14:11Z

commit 3d6271f92e98094584fd1e609a9969cd33e61122 upstream. Without turning the MADC clock on, no MADC conversions occur. $ cat /sys/class/hwmon/hwmon0/device/in8_input [ 53.428436] twl4030_madc twl4030_madc: conversion timeout! cat: read error: Resource temporarily unavailable Signed-off-by: Kyle Manna Signed-off-by: Samuel Ortiz Signed-off-by: Greg Kroah-Hartman

mfd: Check for twl4030-madc NULL pointer

2012-01-06T22:14:11Z

commit d0e84caeb4cd535923884735906e5730329505b4 upstream. If the twl4030-madc device wasn't registered, and another device, such as twl4030-madc-hwmon, calls twl4030_madc_conversion() a NULL pointer is dereferenced. Signed-off-by: Kyle Manna Signed-off-by: Samuel Ortiz Signed-off-by: Greg Kroah-Hartman

mfd: Copy the device pointer to the twl4030-madc structure

2012-01-06T22:14:11Z

commit 66cc5b8e50af87b0bbd0f179d76d2826f4549c13 upstream. Worst case this fixes the following error: [ 72.086212] (NULL device *): conversion timeout! Best case it prevents a crash Signed-off-by: Kyle Manna Signed-off-by: Samuel Ortiz