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authorLinus Torvalds <torvalds@linux-foundation.org>2011-07-22 17:50:57 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-07-22 17:50:57 -0400
commitc7c8518498e82591d7784452f5674c3aeb4d079c (patch)
tree790ff7e6b6741daf32ec686b9a302b957b07c0f4 /drivers/gpio/gpio-tps65910.c
parentece236ce2fad9c27a6fd2530f899289025194bce (diff)
parent591567a5ea25852f20b7ef2953f6f72020121199 (diff)
Merge branch 'gpio/next' of git://git.secretlab.ca/git/linux-2.6
* 'gpio/next' of git://git.secretlab.ca/git/linux-2.6: (61 commits) gpio/mxc/mxs: fix build error introduced by the irq_gc_ack() renaming mcp23s08: add i2c support mcp23s08: isolate spi specific parts mcp23s08: get rid of setup/teardown callbacks gpio/tegra: dt: add binding for gpio polarity mcp23s08: remove unused work queue gpio/da9052: remove a redundant assignment for gpio->da9052 gpio/mxc: add device tree probe support ARM: mxc: use ARCH_NR_GPIOS to define gpio number gpio/mxc: get rid of the uses of cpu_is_mx() gpio/mxc: add missing initialization of basic_mmio_gpio shadow variables gpio: Move mpc5200 gpio driver to drivers/gpio GPIO: DA9052 GPIO module v3 gpio/tegra: Use engineering names in DT compatible property of/gpio: Add new method for getting gpios under different property names gpio/dt: Refine GPIO device tree binding gpio/ml-ioh: fix off-by-one for displaying variable i in dev_err gpio/pca953x: Deprecate meaningless device-tree bindings gpio/pca953x: Remove dynamic platform data pointer gpio/pca953x: Fix IRQ support. ...
Diffstat (limited to 'drivers/gpio/gpio-tps65910.c')
-rw-r--r--drivers/gpio/gpio-tps65910.c102
1 files changed, 102 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-tps65910.c b/drivers/gpio/gpio-tps65910.c
new file mode 100644
index 000000000000..b9c1c297669e
--- /dev/null
+++ b/drivers/gpio/gpio-tps65910.c
@@ -0,0 +1,102 @@
1/*
2 * TI TPS6591x GPIO driver
3 *
4 * Copyright 2010 Texas Instruments Inc.
5 *
6 * Author: Graeme Gregory <gg@slimlogic.co.uk>
7 * Author: Jorge Eduardo Candelaria jedu@slimlogic.co.uk>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 *
14 */
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/errno.h>
19#include <linux/gpio.h>
20#include <linux/i2c.h>
21#include <linux/mfd/tps65910.h>
22
23static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset)
24{
25 struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
26 uint8_t val;
27
28 tps65910->read(tps65910, TPS65910_GPIO0 + offset, 1, &val);
29
30 if (val & GPIO_STS_MASK)
31 return 1;
32
33 return 0;
34}
35
36static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset,
37 int value)
38{
39 struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
40
41 if (value)
42 tps65910_set_bits(tps65910, TPS65910_GPIO0 + offset,
43 GPIO_SET_MASK);
44 else
45 tps65910_clear_bits(tps65910, TPS65910_GPIO0 + offset,
46 GPIO_SET_MASK);
47}
48
49static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset,
50 int value)
51{
52 struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
53
54 /* Set the initial value */
55 tps65910_gpio_set(gc, 0, value);
56
57 return tps65910_set_bits(tps65910, TPS65910_GPIO0 + offset,
58 GPIO_CFG_MASK);
59}
60
61static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset)
62{
63 struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
64
65 return tps65910_clear_bits(tps65910, TPS65910_GPIO0 + offset,
66 GPIO_CFG_MASK);
67}
68
69void tps65910_gpio_init(struct tps65910 *tps65910, int gpio_base)
70{
71 int ret;
72
73 if (!gpio_base)
74 return;
75
76 tps65910->gpio.owner = THIS_MODULE;
77 tps65910->gpio.label = tps65910->i2c_client->name;
78 tps65910->gpio.dev = tps65910->dev;
79 tps65910->gpio.base = gpio_base;
80
81 switch(tps65910_chip_id(tps65910)) {
82 case TPS65910:
83 tps65910->gpio.ngpio = 6;
84 break;
85 case TPS65911:
86 tps65910->gpio.ngpio = 9;
87 break;
88 default:
89 return;
90 }
91 tps65910->gpio.can_sleep = 1;
92
93 tps65910->gpio.direction_input = tps65910_gpio_input;
94 tps65910->gpio.direction_output = tps65910_gpio_output;
95 tps65910->gpio.set = tps65910_gpio_set;
96 tps65910->gpio.get = tps65910_gpio_get;
97
98 ret = gpiochip_add(&tps65910->gpio);
99
100 if (ret)
101 dev_warn(tps65910->dev, "GPIO registration failed: %d\n", ret);
102}