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authorJean Delvare <khali@linux-fr.org>2012-10-06 00:23:51 +0400
committerJean Delvare <khali@endymion.delvare>2012-10-06 00:23:51 +0400
commiteee543e8248150e8fb833943c71f40c7b1724600 (patch)
tree56efec8384b2bca4cf926583b52a7cf6136fa76f /include/linux/i2c-mux-gpio.h
parent5f3d2f2e1a63679cf1c4a4210f2f1cc2f335bef6 (diff)
downloadlinux-eee543e8248150e8fb833943c71f40c7b1724600.tar.xz
i2c-mux: Add support for device auto-detection
Let I2C bus segments behind multiplexers have a class. This allows for device auto-detection on these segments. As long as parent segments don't share the same class, it should be fine. I implemented support in drivers i2c-mux-gpio and i2c-mux-pca954x. I left i2c-mux-pca9541 and i2c-mux-pinctrl alone for the moment as I don't know if this feature makes sense for the use cases of these drivers. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Peter Korsgaard <peter.korsgaard@barco.com> Cc: David Daney <david.daney@cavium.com> Cc: Michael Lawnick <ml.lawnick@gmx.de> Cc: Rodolfo Giometti <giometti@linux.it>
Diffstat (limited to 'include/linux/i2c-mux-gpio.h')
-rw-r--r--include/linux/i2c-mux-gpio.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/i2c-mux-gpio.h b/include/linux/i2c-mux-gpio.h
index a36343a37ebc..4ea1cc7392bd 100644
--- a/include/linux/i2c-mux-gpio.h
+++ b/include/linux/i2c-mux-gpio.h
@@ -21,6 +21,7 @@
* @values: Array of bitmasks of GPIO settings (low/high) for each
* position
* @n_values: Number of multiplexer positions (busses to instantiate)
+ * @classes: Optional I2C auto-detection classes
* @gpios: Array of GPIO numbers used to control MUX
* @n_gpios: Number of GPIOs used to control MUX
* @idle: Bitmask to write to MUX when idle or GPIO_I2CMUX_NO_IDLE if not used
@@ -30,6 +31,7 @@ struct i2c_mux_gpio_platform_data {
int base_nr;
const unsigned *values;
int n_values;
+ const unsigned *classes;
const unsigned *gpios;
int n_gpios;
unsigned idle;