This reintroduces the entropy sampling of the AB3100 IRQ as the
IRQF_SAMPLE_RANDOM is going out according to the feature removal
schedule. I'm trying to do this the right way then, so CC:ing some
random people for a quick review. We add entropy for interrupt
events in the AB3100 which are truly random in nature, like
external cables being connected, voltages on batteries dropping
below certain ranges, ADC triggers or overheating.
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Cc: Robin Getz <rgetz@blackfin.uclinux.org>
Acked-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
the PCF50633 chip.
config AB3100_CORE
the PCF50633 chip.
config AB3100_CORE
- tristate "ST-Ericsson AB3100 Mixed Signal Circuit core functions"
- depends on I2C
+ bool "ST-Ericsson AB3100 Mixed Signal Circuit core functions"
+ depends on I2C=y
default y if ARCH_U300
help
Select this to enable the AB3100 Mixed Signal IC core
default y if ARCH_U300
help
Select this to enable the AB3100 Mixed Signal IC core
- * Copyright (C) 2007-2009 ST-Ericsson
+ * Copyright (C) 2007-2010 ST-Ericsson
* License terms: GNU General Public License (GPL) version 2
* Low-level core for exclusive access to the AB3100 IC on the I2C bus
* and some basic chip-configuration.
* License terms: GNU General Public License (GPL) version 2
* Low-level core for exclusive access to the AB3100 IC on the I2C bus
* and some basic chip-configuration.
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/interrupt.h>
+#include <linux/random.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/uaccess.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/uaccess.h>
+ add_interrupt_randomness(irq);
+
err = ab3100_get_register_page_interruptible(ab3100, AB3100_EVENTA1,
event_regs, 3);
if (err)
err = ab3100_get_register_page_interruptible(ab3100, AB3100_EVENTA1,
event_regs, 3);
if (err)
-/*
- * This lists all the subdevices and corresponding register
- * ranges.
- */
+/* This lists all the subdevices */
AB3100_DEVICE(dac, "ab3100-dac");
AB3100_DEVICE(leds, "ab3100-leds");
AB3100_DEVICE(power, "ab3100-power");
AB3100_DEVICE(dac, "ab3100-dac");
AB3100_DEVICE(leds, "ab3100-leds");
AB3100_DEVICE(power, "ab3100-power");
if (err)
goto exit_no_setup;
if (err)
goto exit_no_setup;
- /* This real unpredictable IRQ is of course sampled for entropy */
err = request_threaded_irq(client->irq, NULL, ab3100_irq_handler,
err = request_threaded_irq(client->irq, NULL, ab3100_irq_handler,
- IRQF_ONESHOT,
- "ab3100-core", ab3100);
+ IRQF_ONESHOT, "ab3100-core", ab3100);
+ /* This real unpredictable IRQ is of course sampled for entropy */
+ rand_initialize_irq(client->irq);
+
if (err)
goto exit_no_irq;
if (err)
goto exit_no_irq;