diff options
| author | Cory Maccarrone <darkstar6262@gmail.com> | 2010-01-19 11:22:45 +0100 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2010-03-07 22:17:09 +0100 |
| commit | 6048a3dd2371c58611ea0ab8b306f8f1469399ae (patch) | |
| tree | 961cff65dda1ea4ab5049d01d858c95ee2ac5044 /include | |
| parent | 08ff6f2a9908c87b0adffe6453291be22db3a62f (diff) | |
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 <darkstar6262@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/htcpld.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/linux/htcpld.h b/include/linux/htcpld.h new file mode 100644 index 00000000000..ab3f6cb4ddd --- /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 */ + |