]> git.proxmox.com Git - mirror_ubuntu-hirsute-kernel.git/blob - arch/m68k/include/asm/gpio.h
regulator: palmas: Fix off-by-one for ramp_delay and register value mapping
[mirror_ubuntu-hirsute-kernel.git] / arch / m68k / include / asm / gpio.h
1 /*
2 * Coldfire generic GPIO support
3 *
4 * (C) Copyright 2009, Steven King <sfking@fdwdc.com>
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 as published by
8 * the Free Software Foundation; version 2 of the License.
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
16 #ifndef coldfire_gpio_h
17 #define coldfire_gpio_h
18
19 #include <linux/io.h>
20 #include <asm/coldfire.h>
21 #include <asm/mcfsim.h>
22 #include <asm/mcfgpio.h>
23 /*
24 * The Generic GPIO functions
25 *
26 * If the gpio is a compile time constant and is one of the Coldfire gpios,
27 * use the inline version, otherwise dispatch thru gpiolib.
28 */
29
30 static inline int gpio_get_value(unsigned gpio)
31 {
32 if (__builtin_constant_p(gpio) && gpio < MCFGPIO_PIN_MAX)
33 return mcfgpio_read(__mcfgpio_ppdr(gpio)) & mcfgpio_bit(gpio);
34 else
35 return __gpio_get_value(gpio);
36 }
37
38 static inline void gpio_set_value(unsigned gpio, int value)
39 {
40 if (__builtin_constant_p(gpio) && gpio < MCFGPIO_PIN_MAX) {
41 if (gpio < MCFGPIO_SCR_START) {
42 unsigned long flags;
43 MCFGPIO_PORTTYPE data;
44
45 local_irq_save(flags);
46 data = mcfgpio_read(__mcfgpio_podr(gpio));
47 if (value)
48 data |= mcfgpio_bit(gpio);
49 else
50 data &= ~mcfgpio_bit(gpio);
51 mcfgpio_write(data, __mcfgpio_podr(gpio));
52 local_irq_restore(flags);
53 } else {
54 if (value)
55 mcfgpio_write(mcfgpio_bit(gpio),
56 MCFGPIO_SETR_PORT(gpio));
57 else
58 mcfgpio_write(~mcfgpio_bit(gpio),
59 MCFGPIO_CLRR_PORT(gpio));
60 }
61 } else
62 __gpio_set_value(gpio, value);
63 }
64
65 static inline int gpio_to_irq(unsigned gpio)
66 {
67 #if defined(MCFGPIO_IRQ_MIN)
68 if ((gpio >= MCFGPIO_IRQ_MIN) && (gpio < MCFGPIO_IRQ_MAX))
69 #else
70 if (gpio < MCFGPIO_IRQ_MAX)
71 #endif
72 return gpio + MCFGPIO_IRQ_VECBASE;
73 else
74 return __gpio_to_irq(gpio);
75 }
76
77 static inline int irq_to_gpio(unsigned irq)
78 {
79 return (irq >= MCFGPIO_IRQ_VECBASE &&
80 irq < (MCFGPIO_IRQ_VECBASE + MCFGPIO_IRQ_MAX)) ?
81 irq - MCFGPIO_IRQ_VECBASE : -ENXIO;
82 }
83
84 static inline int gpio_cansleep(unsigned gpio)
85 {
86 return gpio < MCFGPIO_PIN_MAX ? 0 : __gpio_cansleep(gpio);
87 }
88
89 #endif