On Mar 28, 2011, at 10:35 AM, Kyle Moffett wrote:
To ease the implementation of other MPC85xx board ports, several common GPIO helpers are added to <asm/mpc85xx_gpio.h>.
Since each of these compiles to no more than 4-5 instructions it would be very inefficient to call them out of line, therefore we put them entirely in the header file.
The HWW-1U-1A board port which these were written for strongly prefers to set multiple GPIOs as a single batch operation, so the API is designed around that basis.
To assist other board ports, a small set of wrappers are used which provides a standard gpio_request() interface around the MPC85xx-specific functions. This can be enabled with CONFIG_MPC85XX_GENERIC_GPIO.
Signed-off-by: Kyle Moffett Kyle.D.Moffett@boeing.com Cc: Andy Fleming afleming@gmail.com Cc: Kumar Gala kumar.gala@freescale.com Cc: Peter Tyser ptyser@xes-inc.com
-- Changelog: v2: Moved the inline functions to a non-board-specific header v3: Added generic Linux-standard GPIO wrappers v4: Improved comments and fixed minor bugs in the wrapper functions v6: Rebased onto the 'next' branch of git://git.denx.de/u-boot-mpc85xx.git
arch/powerpc/include/asm/mpc85xx_gpio.h | 120 +++++++++++++++++++++++++++++++ 1 files changed, 120 insertions(+), 0 deletions(-) create mode 100644 arch/powerpc/include/asm/mpc85xx_gpio.h
Please update the README for new #define
- k