diff options
author | Sonic Zhang <sonic.zhang@analog.com> | 2014-09-01 07:19:52 +0400 |
---|---|---|
committer | Linus Walleij <linus.walleij@linaro.org> | 2014-09-04 20:59:15 +0400 |
commit | 3af0dbd592fe0a92002f16e341519ba03e92adf7 (patch) | |
tree | 2e9d28522004ab8a16283fc8cc33d6de13cbdbc6 /include/linux/spi | |
parent | 59e22114b253aaa7caf14221df4dcf924d067922 (diff) | |
download | linux-3af0dbd592fe0a92002f16e341519ba03e92adf7.tar.xz |
gpio: mcp23s08 to support both device tree and platform data
Device tree is not enabled in some architecture where gpio
driver mcp23s08 is still required.
v2-changes:
- Parse device tree properties into platform data other than
individual variables.
v3-changes:
- Use of_node in gpio_chip device structure, because the
struct device * always has an of_node which is NULL when
OF is not used.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'include/linux/spi')
-rw-r--r-- | include/linux/spi/mcp23s08.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/spi/mcp23s08.h b/include/linux/spi/mcp23s08.h index 2d676d5aaa89..aa07d7b32568 100644 --- a/include/linux/spi/mcp23s08.h +++ b/include/linux/spi/mcp23s08.h @@ -22,4 +22,22 @@ struct mcp23s08_platform_data { * base to base+15 (or base+31 for s17 variant). */ unsigned base; + /* Marks the device as a interrupt controller. + * NOTE: The interrupt functionality is only supported for i2c + * versions of the chips. The spi chips can also do the interrupts, + * but this is not supported by the linux driver yet. + */ + bool irq_controller; + + /* Sets the mirror flag in the IOCON register. Devices + * with two interrupt outputs (these are the devices ending with 17 and + * those that have 16 IOs) have two IO banks: IO 0-7 form bank 1 and + * IO 8-15 are bank 2. These chips have two different interrupt outputs: + * One for bank 1 and another for bank 2. If irq-mirror is set, both + * interrupts are generated regardless of the bank that an input change + * occurred on. If it is not set, the interrupt are only generated for + * the bank they belong to. + * On devices with only one interrupt output this property is useless. + */ + bool mirror; }; |