diff options
| author | Andres Salomon <dilinger@collabora.co.uk> | 2009-12-14 18:00:32 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-15 08:53:27 -0800 |
| commit | 5f0a96b044d8edaee20f4a32ef6c393599ca55f8 (patch) | |
| tree | a46994e95854d1771ea6829826793f8bceb39751 /include/linux/cs5535.h | |
| parent | 1f2f38d89d1eced2079189cd880eeacee378370a (diff) | |
| download | lwn-5f0a96b044d8edaee20f4a32ef6c393599ca55f8.tar.gz lwn-5f0a96b044d8edaee20f4a32ef6c393599ca55f8.zip | |
cs5535-gpio: add AMD CS5535/CS5536 GPIO driver support
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>
Diffstat (limited to 'include/linux/cs5535.h')
| -rw-r--r-- | include/linux/cs5535.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/include/linux/cs5535.h b/include/linux/cs5535.h new file mode 100644 index 000000000000..cfea689dfa34 --- /dev/null +++ b/include/linux/cs5535.h @@ -0,0 +1,58 @@ +/* + * AMD CS5535/CS5536 definitions + * Copyright (C) 2006 Advanced Micro Devices, Inc. + * Copyright (C) 2009 Andres Salomon <dilinger@collabora.co.uk> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public License + * as published by the Free Software Foundation. + */ + +#ifndef _CS5535_H +#define _CS5535_H + +/* MSRs */ +#define MSR_LBAR_SMB 0x5140000B +#define MSR_LBAR_GPIO 0x5140000C +#define MSR_LBAR_MFGPT 0x5140000D +#define MSR_LBAR_ACPI 0x5140000E +#define MSR_LBAR_PMS 0x5140000F + +/* resource sizes */ +#define LBAR_GPIO_SIZE 0xFF +#define LBAR_MFGPT_SIZE 0x40 +#define LBAR_ACPI_SIZE 0x40 +#define LBAR_PMS_SIZE 0x80 + +/* GPIOs */ +#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 + +void cs5535_gpio_set(unsigned offset, unsigned int reg); +void cs5535_gpio_clear(unsigned offset, unsigned int reg); +int cs5535_gpio_isset(unsigned offset, unsigned int reg); + +#endif |