From 9e60fdcf0c2905d7a8fc4cb2b3711ea5c5acaae1 Mon Sep 17 00:00:00 2001 From: eric miao Date: Mon, 4 Feb 2008 22:28:26 -0800 Subject: gpiolib: pca9539 i2c gpio expander support 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 Signed-off-by: David Brownell Acked-by: Jean Delvare Cc: Sam Ravnborg Cc: Haavard Skinnemoen Cc: Philipp Zabel Cc: Russell King Cc: Ben Gardner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/gpio/Makefile | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/gpio/Makefile') diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index a1fd877ac52..470ecd6aa77 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -5,4 +5,5 @@ ccflags-$(CONFIG_DEBUG_GPIO) += -DDEBUG obj-$(CONFIG_HAVE_GPIO_LIB) += gpiolib.o obj-$(CONFIG_GPIO_MCP23S08) += mcp23s08.o +obj-$(CONFIG_GPIO_PCA9539) += pca9539.o obj-$(CONFIG_GPIO_PCF857X) += pcf857x.o -- cgit v1.2.3-18-g5258