Merge branch 'dde' into upstream-merged

1 files changed, 31 insertions, 0 deletions

diff --git a/libdde_linux26/contrib/include/linux/spi/mcp23s08.h b/libdde_linux26/contrib/include/linux/spi/mcp23s08.h
new file mode 100644
index 00000000..22ef107d
--- /dev/null
+++ b/libdde_linux26/contrib/include/linux/spi/mcp23s08.h
@@ -0,0 +1,31 @@
+
+/* FIXME driver should be able to handle IRQs...  */
+
+struct mcp23s08_chip_info {
+	bool	is_present;		/* true iff populated */
+	u8	pullups;		/* BIT(x) means enable pullup x */
+};
+
+struct mcp23s08_platform_data {
+	/* Four slaves (numbered 0..3) can share one SPI chipselect, and
+	 * will provide 8..32 GPIOs using 1..4 gpio_chip instances.
+	 */
+	struct mcp23s08_chip_info	chip[4];
+
+	/* "base" is the number of the first GPIO.  Dynamic assignment is
+	 * not currently supported, and even if there are gaps in chip
+	 * addressing the GPIO numbers are sequential .. so for example
+	 * if only slaves 0 and 3 are present, their GPIOs range from
+	 * base to base+15.
+	 */
+	unsigned	base;
+
+	void		*context;	/* param to setup/teardown */
+
+	int		(*setup)(struct spi_device *spi,
+					int gpio, unsigned ngpio,
+					void *context);
+	int		(*teardown)(struct spi_device *spi,
+					int gpio, unsigned ngpio,
+					void *context);
+};