mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-30 08:04:13 +08:00
ae58d1e406
This is useful for SoCs whose I2C module's signals can be routed to
different sets of pins at run-time, using the pinctrl API.
+-----+ +-----+
| dev | | dev |
+------------------------+ +-----+ +-----+
| SoC | | |
| /----|------+--------+
| +---+ +------+ | child bus A, on first set of pins
| |I2C|---|Pinmux| |
| +---+ +------+ | child bus B, on second set of pins
| \----|------+--------+--------+
| | | | |
+------------------------+ +-----+ +-----+ +-----+
| dev | | dev | | dev |
+-----+ +-----+ +-----+
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
/*
|
|
* i2c-mux-pinctrl platform data
|
|
*
|
|
* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef _LINUX_I2C_MUX_PINCTRL_H
|
|
#define _LINUX_I2C_MUX_PINCTRL_H
|
|
|
|
/**
|
|
* struct i2c_mux_pinctrl_platform_data - Platform data for i2c-mux-pinctrl
|
|
* @parent_bus_num: Parent I2C bus number
|
|
* @base_bus_num: Base I2C bus number for the child busses. 0 for dynamic.
|
|
* @bus_count: Number of child busses. Also the number of elements in
|
|
* @pinctrl_states
|
|
* @pinctrl_states: The names of the pinctrl state to select for each child bus
|
|
* @pinctrl_state_idle: The pinctrl state to select when no child bus is being
|
|
* accessed. If NULL, the most recently used pinctrl state will be left
|
|
* selected.
|
|
*/
|
|
struct i2c_mux_pinctrl_platform_data {
|
|
int parent_bus_num;
|
|
int base_bus_num;
|
|
int bus_count;
|
|
const char **pinctrl_states;
|
|
const char *pinctrl_state_idle;
|
|
};
|
|
|
|
#endif
|