| /* | |
| * 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. | |
| * @reset_during_probe: If set to true, the driver will trigger a full | |
| * reset of the chip at the beginning of the probe | |
| * in order to place it in a known state. | |
| */ | |
| 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; | |
| bool reset_during_probe; | |
| }; | |
| #endif /* __LINUX_I2C_SX150X_H */ |