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| author | Hans de Goede <hdegoede@redhat.com> | 2017-04-05 00:03:34 +0200 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2017-04-16 22:02:25 +0200 |
| commit | d1d84bb95364ed604015c2b788caaf3dbca0262f (patch) | |
| tree | 5bcc4bbd25da684e8076b11f22cd097521162d62 /.get_maintainer.ignore | |
| parent | 605f8fc2244236f8d6bf15bcc0586644af3a32e7 (diff) | |
| download | lwn-d1d84bb95364ed604015c2b788caaf3dbca0262f.tar.gz lwn-d1d84bb95364ed604015c2b788caaf3dbca0262f.zip | |
i2c: core: Allow drivers to disable i2c-core irq mapping
By default the i2c-core will try to get an irq with index 0 on ACPI / of
instantiated devices. This is troublesome on some ACPI systems where the
irq info at index 0 in the CRS table may contain nonsense and/or point
to an irqchip for which there is no Linux driver.
If this happens then before this commit the driver's probe method would
never get called because i2c_device_probe will try to get an irq by
calling acpi_dev_gpio_irq_get which will always return -EPROBE in this
case, as it waits for a matching irqchip driver to load. Thus causing
the driver to not get a chance to bind.
This commit adds a new disable_i2c_core_irq_mapping flag to struct
i2c_driver which a driver can set to tell the core to skip irq mapping.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to '.get_maintainer.ignore')
0 files changed, 0 insertions, 0 deletions