On Sat, 5 Jan 2008 11:40:55 -0800, David Brownell wrote: > From: eric miao <[EMAIL PROTECTED]> > Subject: [PATCH] gpiolib: support PCA9539 GPIO expander > > This adds a new-style I2C driver with basic support for the sixteen > bit PCA9539 GPIO expanders. These chips have multiple registers, > push-pull output drivers, and (not supported in this patch) pin > change interrupts. > > Board-specific code must provide "pca9539_platform_data" with each > chip's "i2c_board_info". That provides the GPIO numbers to be used > by that chip, and callbacks for board-specific setup/teardown logic. > > Derived from drivers/i2c/chips/pca9539.c (which has no current known > users). This is faster and simpler; it uses 16-bit register access, > and cache the OUTPUT and DIRECTION registers for fast access > > Signed-off-by: eric miao <[EMAIL PROTECTED]> > Signed-off-by: David Brownell <[EMAIL PROTECTED]> > --- > Incorporates cleanups noted by Jean Delvare. > > drivers/gpio/Kconfig | 10 + > drivers/gpio/Makefile | 1 > drivers/gpio/pca9539.c | 271 > ++++++++++++++++++++++++++++++++++++++++++++ > include/linux/i2c/pca9539.h | 18 ++ > 4 files changed, 300 insertions(+)
Acked-by: Jean Delvare <[EMAIL PROTECTED]> -- Jean Delvare -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
