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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. | |
5affb607 GB |
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. | |
c34f16b7 GB |
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; | |
5affb607 | 79 | bool reset_during_probe; |
c34f16b7 GB |
80 | }; |
81 | ||
82 | #endif /* __LINUX_I2C_SX150X_H */ |