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cs5535-gpio: add AMD CS5535/CS5536 GPIO driver support

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This creates a CS5535/CS5536 GPIO driver which uses a gpio_chip backend
(allowing GPIO users to use the generic GPIO API if desired) while also
allowing architecture-specific users directly (via the cs5535_gpio_*
functions).

Tested on an OLPC machine.  Some Leemotes also use CS5536 (with a mips
cpu), which is why this is in drivers/gpio rather than arch/x86.
Currently, it conflicts with older geode GPIO support; once MFGPT support
is reworked to also be more generic, the older geode code will be removed.

Signed-off-by: Andres Salomon <dilinger@collabora.co.uk>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Jordan Crouse <jordan@cosmicpenguin.net>
Cc: David Brownell <david-b@pacbell.net>
Reviewed-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andres Salomon
2009-12-14 18:00:32 -08:00
committed by Linus Torvalds
parent 1f2f38d89d
commit 5f0a96b044
5 changed files with 352 additions and 27 deletions
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28
arch/x86/include/asm/geode.h
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@@ -12,6 +12,7 @@
#include <asm/processor.h>
#include <linux/io.h>
#include <linux/cs5535.h>
/* Generic southbridge functions */
@@ -115,33 +116,6 @@ extern int geode_get_dev_base(unsigned int dev);
#define VSA_VR_MEM_SIZE 0x0200
#define AMD_VSA_SIG 0x4132 /* signature is ascii 'VSA2' */
#define GSW_VSA_SIG 0x534d /* General Software signature */
/* GPIO */
#define GPIO_OUTPUT_VAL 0x00
#define GPIO_OUTPUT_ENABLE 0x04
#define GPIO_OUTPUT_OPEN_DRAIN 0x08
#define GPIO_OUTPUT_INVERT 0x0C
#define GPIO_OUTPUT_AUX1 0x10
#define GPIO_OUTPUT_AUX2 0x14
#define GPIO_PULL_UP 0x18
#define GPIO_PULL_DOWN 0x1C
#define GPIO_INPUT_ENABLE 0x20
#define GPIO_INPUT_INVERT 0x24
#define GPIO_INPUT_FILTER 0x28
#define GPIO_INPUT_EVENT_COUNT 0x2C
#define GPIO_READ_BACK 0x30
#define GPIO_INPUT_AUX1 0x34
#define GPIO_EVENTS_ENABLE 0x38
#define GPIO_LOCK_ENABLE 0x3C
#define GPIO_POSITIVE_EDGE_EN 0x40
#define GPIO_NEGATIVE_EDGE_EN 0x44
#define GPIO_POSITIVE_EDGE_STS 0x48
#define GPIO_NEGATIVE_EDGE_STS 0x4C
#define GPIO_MAP_X 0xE0
#define GPIO_MAP_Y 0xE4
#define GPIO_MAP_Z 0xE8
#define GPIO_MAP_W 0xEC
static inline u32 geode_gpio(unsigned int nr)
{