This series implements the two different mechanisms for propagating single bit state information, used on the various Qualcomm platforms. The system was traditionally used by the modem and application processor to convey information about boot progress, power states, error handling and so on. This was implemented as SMSM, with status bits representing a single local state. As the complexity of the SoC grew the state bits array grew and the need for targeting specific state information at specific remote processors appeared. SMP2P solves this by having separate shared memory regions per processor-pair. This state information is e.g. used to convey progress and status of remote firmware loading. Individual bits maps to various stages of the boot and error states. As some of these states on some platforms are passed as physical signals instead, the two drivers are modelled as gpio- and interrupt-controllers - providing a nice abstraction both in device tree sense and Linux implementation sense. Bjorn Andersson (4): dt-binding: gpio: Add Qualcomm SMSM device tree documentation gpio: qcom-smsm: Add driver for Qualcomm SMSM dt-binding: gpio: Introduce qcom,smp2p binding documentation gpio: qcom-smp2p: Qualcomm Shared Memory Point to Point .../devicetree/bindings/gpio/qcom,smp2p.txt | 112 ++++ .../devicetree/bindings/gpio/qcom,smsm.txt | 114 ++++ drivers/gpio/Kconfig | 15 + drivers/gpio/Makefile | 2 + drivers/gpio/gpio-qcom-smp2p.c | 601 ++++++++++++++++++++ drivers/gpio/gpio-qcom-smsm.c | 631 +++++++++++++++++++++ 6 files changed, 1475 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/qcom,smp2p.txt create mode 100644 Documentation/devicetree/bindings/gpio/qcom,smsm.txt create mode 100644 drivers/gpio/gpio-qcom-smp2p.c create mode 100644 drivers/gpio/gpio-qcom-smsm.c -- 1.8.2.2 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
