On Tue, Sep 23, 2008 at 11:07:00PM -0500, Kumar Gala wrote:
On Sep 23, 2008, at 7:03 PM, Anton Vorontsov wrote:
qe_gpio_set_dedicated() is a platform specific function, which is used
to revert a pin to a dedicated function. Caller should have already
obtained the gpio via gpio_request().
This is needed to support Freescale USB Host Controller.
Signed-off-by: Anton Vorontsov <avorontsov@xxxxxxxxxxxxx>
---
arch/powerpc/include/asm/qe.h | 1 +
arch/powerpc/sysdev/qe_lib/gpio.c | 46 ++++++++++++++++++++++++++ ++
+++++++++
2 files changed, 47 insertions(+), 0 deletions(-)
what do you mean by dedicated function.. be a bit clearer in the commit
log.
This term is from the QE spec, I didn't invent anything. ;-)
"Each pin in the I/O ports can be configured as a general-purpose
I/O signal or as a dedicated peripheral interface signal. ...many
dedicated peripheral functions are multiplexed onto the ports."
Also, does this depend on gpio_to_chip() patch?
Yeah, the point of exported gpio_to_chip is to let us write
this function.