ARM: Exynos4210 IRQ: Introduce new IRQ gate functionality.
New IRQ gate consists of n_in input qdev gpio lines and one output sysbus IRQ line. The output IRQ level is formed as OR between all gpio inputs. Signed-off-by: NEvgeny Voevodin <e.voevodin@samsung.com> Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
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