From 752ad5e82dfd83851e44a2b9da8761994cd7e61c Mon Sep 17 00:00:00 2001 From: Peter Korsgaard Date: Fri, 15 Jul 2011 10:25:32 +0200 Subject: mcp23s08: add i2c support Add i2c bindings for the mcp230xx devices. This is quite a lot simpler than the spi one as there's no funky sub addressing done (one struct i2c_client per struct gpio_chip). The mcp23s08_platform_data structure is reused for i2c, even though only a single mcp23s08_chip_info structure is needed. To use, simply fill out a platform_data structure and pass it in i2c_board_info, E.G.: static const struct mcp23s08_platform_data mcp23017_data = { .chip[0] = { .pullups = 0x00ff, }, .base = 240, }; static struct i2c_board_info __initdata i2c_devs[] = { { I2C_BOARD_INFO("mcp23017", 0x20), .platform_data = &smartview_mcp23017_data, }, ... }; Signed-off-by: Peter Korsgaard Signed-off-by: Grant Likely --- drivers/gpio/Kconfig | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'drivers/gpio/Kconfig') diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 47eae6ea5dd2..363498697c2c 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -412,10 +412,11 @@ config GPIO_MAX7301 GPIO driver for Maxim MAX7301 SPI-based GPIO expander. config GPIO_MCP23S08 - tristate "Microchip MCP23Sxx I/O expander" - depends on SPI_MASTER + tristate "Microchip MCP23xxx I/O expander" + depends on SPI_MASTER || I2C help - SPI driver for Microchip MCP23S08/MPC23S17 I/O expanders. + SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017 + I/O expanders. This provides a GPIO interface supporting inputs and outputs. config GPIO_MC33880 -- cgit v1.2.2