The functions for accessing GPIOs on MPC85xx are hardcoded in arch/powerpc/include/asm/mpc85xx_gpio.h This leads to problems if another GPIO controller supporting the driver model is to be used simultaneously.
Therefore, this patch moves the "static" functions into a DM-compatible driver, and also introduces a set of functions into the GPIO uclass that expose the controller's capability to switch individual GPIOs into open-drain-mode.
v3/v4 also implement shadowing of the GPDAT register to work around a known issue in some MPC85xx GPIO controllers (as pointed out by Joakim Tjernlund).
Furthermore, v4 adds tests for the open drain setting feature and extends the sandbox GPIO driver accordingly.
Mario Six (4): dm: gpio: Add driver for MPC85XX GPIO controller dm: gpio: Add methods for open drain setting dm: gpio: Implement open drain for MPC85XX GPIO dm: test: Add GPIO open drain tests
arch/powerpc/include/asm/arch-mpc85xx/gpio.h | 2 + arch/powerpc/include/asm/immap_85xx.h | 2 + drivers/gpio/Kconfig | 25 +++ drivers/gpio/Makefile | 1 + drivers/gpio/gpio-uclass.c | 32 ++++ drivers/gpio/mpc85xx_gpio.c | 228 +++++++++++++++++++++++++++ drivers/gpio/sandbox.c | 35 ++++ include/asm-generic/gpio.h | 34 ++++ test/dm/gpio.c | 7 + 9 files changed, 366 insertions(+) create mode 100644 drivers/gpio/mpc85xx_gpio.c
-- 2.7.0.GIT