Hi, The PPD has a secondary processor from NXP, which can be programmed from the main system. It is connected to the main processor by having it's EzPort interface connected to the SPI bus. This adds a generic driver to handle firmware flashing via NXP EzPort and adds a custom compatible for the instance found in GE's device. The reset gpio is only requested during flashing, since it is also used for resetting other devices. A better solution for the shared reset gpio is required at some point, but this does neither affect the userspace interface, nor the DT interface and should not block upstreaming this driver. Changes since PATCHv1: * split DT binding update into its own patch * add sysfs attribute documentation * fix problem reported by kbuild test robot -- Sebastian Sebastian Reichel (3): dt-bindings: misc: achc: Make ezport distinguishable misc: ezport-firmware: new driver ARM: dts: imx53: PPD: Update ACHC programming interface Documentation/ABI/testing/sysfs-bus-spi-ezport-fw | 23 + Documentation/devicetree/bindings/misc/ge-achc.txt | 19 +- arch/arm/boot/dts/imx53-ppd.dts | 5 +- drivers/misc/Kconfig | 9 + drivers/misc/Makefile | 1 + drivers/misc/ezport-firmware.c | 491 +++++++++++++++++++++ 6 files changed, 543 insertions(+), 5 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-bus-spi-ezport-fw create mode 100644 drivers/misc/ezport-firmware.c -- 2.16.2 -- 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
