| /* |
| * 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 */ |
