| Gregory Bean | c34f16b | 2010-08-10 18:02:27 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Driver for the Semtech SX150x I2C GPIO Expanders |
| 3 | * |
| 4 | * Copyright (c) 2010, Code Aurora Forum. All rights reserved. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 and |
| 8 | * only version 2 as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 18 | * 02110-1301, USA. |
| 19 | */ |
| 20 | #ifndef __LINUX_I2C_SX150X_H |
| 21 | #define __LINUX_I2C_SX150X_H |
| 22 | |
| 23 | /** |
| 24 | * struct sx150x_platform_data - config data for SX150x driver |
| 25 | * @gpio_base: The index number of the first GPIO assigned to this |
| 26 | * GPIO expander. The expander will create a block of |
| 27 | * consecutively numbered gpios beginning at the given base, |
| 28 | * with the size of the block depending on the model of the |
| 29 | * expander chip. |
| 30 | * @oscio_is_gpo: If set to true, the driver will configure OSCIO as a GPO |
| 31 | * instead of as an oscillator, increasing the size of the |
| 32 | * GP(I)O pool created by this expander by one. The |
| 33 | * output-only GPO pin will be added at the end of the block. |
| 34 | * @io_pullup_ena: A bit-mask which enables or disables the pull-up resistor |
| 35 | * for each IO line in the expander. Setting the bit at |
| 36 | * position n will enable the pull-up for the IO at |
| 37 | * the corresponding offset. For chips with fewer than |
| 38 | * 16 IO pins, high-end bits are ignored. |
| 39 | * @io_pulldn_ena: A bit-mask which enables-or disables the pull-down |
| 40 | * resistor for each IO line in the expander. Setting the |
| 41 | * bit at position n will enable the pull-down for the IO at |
| 42 | * the corresponding offset. For chips with fewer than |
| 43 | * 16 IO pins, high-end bits are ignored. |
| 44 | * @io_open_drain_ena: A bit-mask which enables-or disables open-drain |
| 45 | * operation for each IO line in the expander. Setting the |
| 46 | * bit at position n enables open-drain operation for |
| 47 | * the IO at the corresponding offset. Clearing the bit |
| 48 | * enables regular push-pull operation for that IO. |
| 49 | * For chips with fewer than 16 IO pins, high-end bits |
| 50 | * are ignored. |
| 51 | * @io_polarity: A bit-mask which enables polarity inversion for each IO line |
| 52 | * in the expander. Setting the bit at position n inverts |
| 53 | * the polarity of that IO line, while clearing it results |
| 54 | * in normal polarity. For chips with fewer than 16 IO pins, |
| 55 | * high-end bits are ignored. |
| 56 | * @irq_summary: The 'summary IRQ' line to which the GPIO expander's INT line |
| 57 | * is connected, via which it reports interrupt events |
| 58 | * across all GPIO lines. This must be a real, |
| 59 | * pre-existing IRQ line. |
| 60 | * Setting this value < 0 disables the irq_chip functionality |
| 61 | * of the driver. |
| 62 | * @irq_base: The first 'virtual IRQ' line at which our block of GPIO-based |
| 63 | * IRQ lines will appear. Similarly to gpio_base, the expander |
| 64 | * will create a block of irqs beginning at this number. |
| 65 | * This value is ignored if irq_summary is < 0. |
| Gregory Bean | 5affb60 | 2010-09-09 16:38:02 -0700 | [diff] [blame] | 66 | * @reset_during_probe: If set to true, the driver will trigger a full |
| 67 | * reset of the chip at the beginning of the probe |
| 68 | * in order to place it in a known state. |
| Gregory Bean | c34f16b | 2010-08-10 18:02:27 -0700 | [diff] [blame] | 69 | */ |
| 70 | struct sx150x_platform_data { |
| 71 | unsigned gpio_base; |
| 72 | bool oscio_is_gpo; |
| 73 | u16 io_pullup_ena; |
| 74 | u16 io_pulldn_ena; |
| 75 | u16 io_open_drain_ena; |
| 76 | u16 io_polarity; |
| 77 | int irq_summary; |
| 78 | unsigned irq_base; |
| Gregory Bean | 5affb60 | 2010-09-09 16:38:02 -0700 | [diff] [blame] | 79 | bool reset_during_probe; |
| Gregory Bean | c34f16b | 2010-08-10 18:02:27 -0700 | [diff] [blame] | 80 | }; |
| 81 | |
| 82 | #endif /* __LINUX_I2C_SX150X_H */ |