3rd-party/linux-kernel-module-cheat
1
0
Fork 0
mirror of https://github.com/cirosantilli/linux-kernel-module-cheat.git synced 2026-01-27 20:14:27 +01:00
Code Issues Releases Wiki Activity

dummy-irq

Browse Source
This commit is contained in:
Ciro Santilli
2017-07-09 11:31:37 +01:00
parent 1cd55ebf53
commit 10d84a2d54
2 changed files with 20 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
kernel_config_fragment
View File

@@ -1,5 +1,5 @@
# Changes to this file are automatically used in the new kernel # Changes to this file are automatically trigger kernel reconfigures
# after ./run, no need to do anything different. # even without using the linux-reconfigure target.
CONFIG_DEBUG_FS=y CONFIG_DEBUG_FS=y
CONFIG_DEBUG_INFO=y CONFIG_DEBUG_INFO=y
@@ -108,3 +108,19 @@ CONFIG_ARM_AMBA=y
CONFIG_GPIOLIB=y CONFIG_GPIOLIB=y
CONFIG_GPIO_SYSFS=y CONFIG_GPIO_SYSFS=y
CONFIG_GPIO_PL061=y CONFIG_GPIO_PL061=y
# run -a arm
#
# In target:
#
# modprobe dummy-irq irq=34
# insmod /platform_device.ko
#
# Outcome:
#
# lkmc_platform_device_write offset=0 value=12345678 size=4
# dummy-irq: interrupt occurred on IRQ 34
#
# When the device generates an IRQ,
# the dummy module also snoops it.
CONFIG_DUMMY_IRQ=m

4
kernel_module/platform_device.c
View File

@@ -55,9 +55,9 @@ static int lkmc_platform_device_probe(struct platform_device *pdev)
return -EINVAL; return -EINVAL;
} }
/* IRQ. */ /* IRQ. Shared so that other test modules may snoop it. */
irq = irq_of_parse_and_map(dev->of_node, 0); irq = irq_of_parse_and_map(dev->of_node, 0);
if (request_irq(irq, lkmc_irq_handler, 0, "lkmc_platform_device", dev) < 0) { if (request_irq(irq, lkmc_irq_handler, IRQF_SHARED, "lkmc_platform_device", dev) < 0) {
dev_err(dev, "request_irq"); dev_err(dev, "request_irq");
return -EINVAL; return -EINVAL;
} }