Message ID | cover.1426456462.git.horms+renesas@verge.net.au |
---|---|
State | New |
Headers | show |
On Monday 16 March 2015 08:03:07 Simon Horman wrote: > Renesas ARM Based SoC da9063/da9210 Regulator Quirk for v4.1 > > The r8a7790/lager and r8a7791/koelsch development boards have da9063 and > da9210 regulators. Both regulators have their interrupt request lines > tied to the same interrupt pin (IRQ2) on the SoC. > > After cold boot or da9063-induced restart, both the da9063 and da9210 > seem to assert their interrupt request lines. Hence as soon as one > driver requests this irq, it gets stuck in an interrupt storm, as it > only manages to deassert its own interrupt request line, and the other > driver hasn't installed an interrupt handler yet. > > To handle this, install a quirk that masks the interrupts in both the > da9063 and da9210. This quirk has to run after the i2c master driver > has been initialized, but before the i2c slave drivers are initialized. > As it depends on i2c, select I2C if one of the affected platforms is > enabled in the kernel config. > Pulled into next/soc, thanks! Arnd