From 6048a3dd2371c58611ea0ab8b306f8f1469399ae Mon Sep 17 00:00:00 2001 From: Cory Maccarrone Date: Tue, 19 Jan 2010 11:22:45 +0100 Subject: mfd: Add HTCPLD driver This change introduces a driver for the HTC PLD chip found on some smartphones, such as the HTC Wizard and HTC Herald. It works through the I2C bus and acts as a GPIO extender. Specifically: * it can have several sub-devices, each with its own I2C address * Each sub-device provides 8 output and 8 input pins * The chip attaches to one GPIO to signal when any of the input GPIOs change -- at which point all chips must be scanned for changes This driver implements the GPIOs throught the kernel's GPIO and IRQ framework. This allows any GPIO-servicing drivers to operate on htcpld pins, such as the gpio-keys and gpio-leds drivers. Signed-off-by: Cory Maccarrone Signed-off-by: Samuel Ortiz --- include/linux/htcpld.h | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 include/linux/htcpld.h (limited to 'include/linux/htcpld.h') diff --git a/include/linux/htcpld.h b/include/linux/htcpld.h new file mode 100644 index 000000000000..ab3f6cb4dddc --- /dev/null +++ b/include/linux/htcpld.h @@ -0,0 +1,24 @@ +#ifndef __LINUX_HTCPLD_H +#define __LINUX_HTCPLD_H + +struct htcpld_chip_platform_data { + unsigned int addr; + unsigned int reset; + unsigned int num_gpios; + unsigned int gpio_out_base; + unsigned int gpio_in_base; + unsigned int irq_base; + unsigned int num_irqs; +}; + +struct htcpld_core_platform_data { + unsigned int int_reset_gpio_hi; + unsigned int int_reset_gpio_lo; + unsigned int i2c_adapter_id; + + struct htcpld_chip_platform_data *chip; + unsigned int num_chip; +}; + +#endif /* __LINUX_HTCPLD_H */ + -- cgit v1.2.3-58-ga151