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authorAurelien Jarno <aurelien@aurel32.net>2007-09-25 09:42:09 -0400
committerRalf Baechle <ralf@linux-mips.org>2007-10-11 18:46:07 -0400
commit34cc662f8aae0ce1db5c64d55a39a5081f9e3cd8 (patch)
tree69447356fb052c8aa3a74154f2dee082b64f275d /arch/mips/bcm47xx
parent25e5fb97419f73d39b37e9f73f9492c394de07b2 (diff)
[MIPS] Add gpio support to the BCM47XX platform
Add GPIO support to the BCM47XX platform. It will be used by a GPIO LED driver. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/bcm47xx')
-rw-r--r--arch/mips/bcm47xx/Makefile2
-rw-r--r--arch/mips/bcm47xx/gpio.c79
2 files changed, 80 insertions, 1 deletions
diff --git a/arch/mips/bcm47xx/Makefile b/arch/mips/bcm47xx/Makefile
index dc035f90d363..0afe09703e3f 100644
--- a/arch/mips/bcm47xx/Makefile
+++ b/arch/mips/bcm47xx/Makefile
@@ -3,4 +3,4 @@
3# under Linux. 3# under Linux.
4# 4#
5 5
6obj-y := irq.o prom.o serial.o setup.o time.o 6obj-y := gpio.o irq.o prom.o serial.o setup.o time.o
diff --git a/arch/mips/bcm47xx/gpio.c b/arch/mips/bcm47xx/gpio.c
new file mode 100644
index 000000000000..f5a53acf995a
--- /dev/null
+++ b/arch/mips/bcm47xx/gpio.c
@@ -0,0 +1,79 @@
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net>
7 */
8
9#include <linux/ssb/ssb.h>
10#include <linux/ssb/ssb_driver_chipcommon.h>
11#include <linux/ssb/ssb_driver_extif.h>
12#include <asm/mach-bcm47xx/bcm47xx.h>
13#include <asm/mach-bcm47xx/gpio.h>
14
15int bcm47xx_gpio_to_irq(unsigned gpio)
16{
17 if (ssb_bcm47xx.chipco.dev)
18 return ssb_mips_irq(ssb_bcm47xx.chipco.dev) + 2;
19 else if (ssb_bcm47xx.extif.dev)
20 return ssb_mips_irq(ssb_bcm47xx.extif.dev) + 2;
21 else
22 return -EINVAL;
23}
24EXPORT_SYMBOL_GPL(bcm47xx_gpio_to_irq);
25
26int bcm47xx_gpio_get_value(unsigned gpio)
27{
28 if (ssb_bcm47xx.chipco.dev)
29 return ssb_chipco_gpio_in(&ssb_bcm47xx.chipco, 1 << gpio);
30 else if (ssb_bcm47xx.extif.dev)
31 return ssb_extif_gpio_in(&ssb_bcm47xx.extif, 1 << gpio);
32 else
33 return 0;
34}
35EXPORT_SYMBOL_GPL(bcm47xx_gpio_get_value);
36
37void bcm47xx_gpio_set_value(unsigned gpio, int value)
38{
39 if (ssb_bcm47xx.chipco.dev)
40 ssb_chipco_gpio_out(&ssb_bcm47xx.chipco,
41 1 << gpio,
42 value ? 1 << gpio : 0);
43 else if (ssb_bcm47xx.extif.dev)
44 ssb_extif_gpio_out(&ssb_bcm47xx.extif,
45 1 << gpio,
46 value ? 1 << gpio : 0);
47}
48EXPORT_SYMBOL_GPL(bcm47xx_gpio_set_value);
49
50int bcm47xx_gpio_direction_input(unsigned gpio)
51{
52 if (ssb_bcm47xx.chipco.dev && (gpio < BCM47XX_CHIPCO_GPIO_LINES))
53 ssb_chipco_gpio_outen(&ssb_bcm47xx.chipco,
54 1 << gpio, 0);
55 else if (ssb_bcm47xx.extif.dev && (gpio < BCM47XX_EXTIF_GPIO_LINES))
56 ssb_extif_gpio_outen(&ssb_bcm47xx.extif,
57 1 << gpio, 0);
58 else
59 return -EINVAL;
60 return 0;
61}
62EXPORT_SYMBOL_GPL(bcm47xx_gpio_direction_input);
63
64int bcm47xx_gpio_direction_output(unsigned gpio, int value)
65{
66 bcm47xx_gpio_set_value(gpio, value);
67
68 if (ssb_bcm47xx.chipco.dev && (gpio < BCM47XX_CHIPCO_GPIO_LINES))
69 ssb_chipco_gpio_outen(&ssb_bcm47xx.chipco,
70 1 << gpio, 1 << gpio);
71 else if (ssb_bcm47xx.extif.dev && (gpio < BCM47XX_EXTIF_GPIO_LINES))
72 ssb_extif_gpio_outen(&ssb_bcm47xx.extif,
73 1 << gpio, 1 << gpio);
74 else
75 return -EINVAL;
76 return 0;
77}
78EXPORT_SYMBOL_GPL(bcm47xx_gpio_direction_output);
79