This patch series adds hierarchical IRQ chip support to spmi-gpio so that device tree consumers can request an IRQ directly from the GPIO block rather than having to request an IRQ from the underlying PMIC. The first patch in this series converts pmic-arb to use the version 2 IRQ interface and patches 2 and 3 add support for the hierarchical IRQ chip to spmi-gpio. For more background information, see the email thread with Linus Walleij's excellent description of the problem at https://www.spinics.net/lists/linux-gpio/msg34655.html. The patches need to be applied in the order that I have them in order to allow for a proper bisection, however part of the series can be applied without any breakage. Maybe the spmi-arb change can go in for v4.21 and the spmi-gpio changes can go in for v4.22? This work was tested on a LG Nexus 5 (hammerhead) phone. My status page at https://masneyb.github.io/nexus-5-upstream/ describes what is working so far with an upstream kernel. Brian Masney (3): spmi: pmic-arb: convert to v2 irq interfaces to support hierarchical IRQ chips qcom: spmi-gpio: add support for hierarchical IRQ chip ARM: dts: qcom: msm8974: add interrupt properties arch/arm/boot/dts/qcom-pm8941.dtsi | 3 + drivers/pinctrl/qcom/pinctrl-spmi-gpio.c | 119 ++++++++++++++++++++++- drivers/spmi/spmi-pmic-arb.c | 91 ++++++++++++----- 3 files changed, 182 insertions(+), 31 deletions(-) -- 2.17.2
