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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
/*
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* i2c-mux-pinctrl platform data
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*
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* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _LINUX_I2C_MUX_PINCTRL_H
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#define _LINUX_I2C_MUX_PINCTRL_H
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/**
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* struct i2c_mux_pinctrl_platform_data - Platform data for i2c-mux-pinctrl
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* @parent_bus_num: Parent I2C bus number
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* @base_bus_num: Base I2C bus number for the child busses. 0 for dynamic.
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* @bus_count: Number of child busses. Also the number of elements in
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* @pinctrl_states
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* @pinctrl_states: The names of the pinctrl state to select for each child bus
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* @pinctrl_state_idle: The pinctrl state to select when no child bus is being
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* accessed. If NULL, the most recently used pinctrl state will be left
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* selected.
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*/
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struct i2c_mux_pinctrl_platform_data {
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int parent_bus_num;
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int base_bus_num;
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int bus_count;
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const char **pinctrl_states;
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const char *pinctrl_state_idle;
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};
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#endif
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