diff options
Diffstat (limited to 'include/linux/i2c')
| -rw-r--r-- | include/linux/i2c/pca954x.h | 47 | ||||
| -rw-r--r-- | include/linux/i2c/sx150x.h | 78 |
2 files changed, 125 insertions, 0 deletions
diff --git a/include/linux/i2c/pca954x.h b/include/linux/i2c/pca954x.h new file mode 100644 index 00000000000..28f1f8d5ab1 --- /dev/null +++ b/include/linux/i2c/pca954x.h @@ -0,0 +1,47 @@ +/* + * + * pca954x.h - I2C multiplexer/switch support + * + * Copyright (c) 2008-2009 Rodolfo Giometti <giometti@linux.it> + * Copyright (c) 2008-2009 Eurotech S.p.A. <info@eurotech.it> + * Michael Lawnick <michael.lawnick.ext@nsn.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that 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, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + + +#ifndef _LINUX_I2C_PCA954X_H +#define _LINUX_I2C_PCA954X_H + +/* Platform data for the PCA954x I2C multiplexers */ + +/* Per channel initialisation data: + * @adap_id: bus number for the adapter. 0 = don't care + * @deselect_on_exit: set this entry to 1, if your H/W needs deselection + * of this channel after transaction. + * + */ +struct pca954x_platform_mode { + int adap_id; + unsigned int deselect_on_exit:1; +}; + +/* Per mux/switch data, used with i2c_register_board_info */ +struct pca954x_platform_data { + struct pca954x_platform_mode *modes; + int num_modes; +}; + +#endif /* _LINUX_I2C_PCA954X_H */ diff --git a/include/linux/i2c/sx150x.h b/include/linux/i2c/sx150x.h new file mode 100644 index 00000000000..ee3049cb9ba --- /dev/null +++ b/include/linux/i2c/sx150x.h @@ -0,0 +1,78 @@ +/* + * Driver for the Semtech SX150x I2C GPIO Expanders + * + * Copyright (c) 2010, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that 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, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ +#ifndef __LINUX_I2C_SX150X_H +#define __LINUX_I2C_SX150X_H + +/** + * struct sx150x_platform_data - config data for SX150x driver + * @gpio_base: The index number of the first GPIO assigned to this + * GPIO expander. The expander will create a block of + * consecutively numbered gpios beginning at the given base, + * with the size of the block depending on the model of the + * expander chip. + * @oscio_is_gpo: If set to true, the driver will configure OSCIO as a GPO + * instead of as an oscillator, increasing the size of the + * GP(I)O pool created by this expander by one. The + * output-only GPO pin will be added at the end of the block. + * @io_pullup_ena: A bit-mask which enables or disables the pull-up resistor + * for each IO line in the expander. Setting the bit at + * position n will enable the pull-up for the IO at + * the corresponding offset. For chips with fewer than + * 16 IO pins, high-end bits are ignored. + * @io_pulldn_ena: A bit-mask which enables-or disables the pull-down + * resistor for each IO line in the expander. Setting the + * bit at position n will enable the pull-down for the IO at + * the corresponding offset. For chips with fewer than + * 16 IO pins, high-end bits are ignored. + * @io_open_drain_ena: A bit-mask which enables-or disables open-drain + * operation for each IO line in the expander. Setting the + * bit at position n enables open-drain operation for + * the IO at the corresponding offset. Clearing the bit + * enables regular push-pull operation for that IO. + * For chips with fewer than 16 IO pins, high-end bits + * are ignored. + * @io_polarity: A bit-mask which enables polarity inversion for each IO line + * in the expander. Setting the bit at position n inverts + * the polarity of that IO line, while clearing it results + * in normal polarity. For chips with fewer than 16 IO pins, + * high-end bits are ignored. + * @irq_summary: The 'summary IRQ' line to which the GPIO expander's INT line + * is connected, via which it reports interrupt events + * across all GPIO lines. This must be a real, + * pre-existing IRQ line. + * Setting this value < 0 disables the irq_chip functionality + * of the driver. + * @irq_base: The first 'virtual IRQ' line at which our block of GPIO-based + * IRQ lines will appear. Similarly to gpio_base, the expander + * will create a block of irqs beginning at this number. + * This value is ignored if irq_summary is < 0. + */ +struct sx150x_platform_data { + unsigned gpio_base; + bool oscio_is_gpo; + u16 io_pullup_ena; + u16 io_pulldn_ena; + u16 io_open_drain_ena; + u16 io_polarity; + int irq_summary; + unsigned irq_base; +}; + +#endif /* __LINUX_I2C_SX150X_H */ |