diff options
| author | Rabin Vincent <rabin.vincent@stericsson.com> | 2010-06-02 06:06:29 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-06-16 22:27:35 +0100 |
| commit | 378be0663dbb2de033ae7a1231227be09e6ad0a3 (patch) | |
| tree | cbe2b1728b405236110b8ce68741a44257e7d081 /arch/arm/plat-nomadik/include | |
| parent | 6f9a974cf6fdd189ff383c8b75c22c65dab20b52 (diff) | |
ARM: 6155/1: nomadik-gpio: add pin configuration API
Add a pin configuration API to all pin-related configuration to be
specified with a single macro and groups of pins to be configured
at one go. Based on the PXA MFP implementation.
Cc: Alessandro Rubini <rubini@unipv.it>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/plat-nomadik/include')
| -rw-r--r-- | arch/arm/plat-nomadik/include/plat/pincfg.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/arch/arm/plat-nomadik/include/plat/pincfg.h b/arch/arm/plat-nomadik/include/plat/pincfg.h new file mode 100644 index 00000000000..7eed11c1038 --- /dev/null +++ b/arch/arm/plat-nomadik/include/plat/pincfg.h @@ -0,0 +1,72 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * License terms: GNU General Public License, version 2 + * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson + * + * Based on arch/arm/mach-pxa/include/mach/mfp.h: + * Copyright (C) 2007 Marvell International Ltd. + * eric miao <eric.miao@marvell.com> + */ + +#ifndef __PLAT_PINCFG_H +#define __PLAT_PINCFG_H + +/* + * pin configurations are represented by 32-bit integers: + * + * bit 0.. 8 - Pin Number (512 Pins Maximum) + * bit 9..10 - Alternate Function Selection + * bit 11..12 - Pull up/down state + * bit 13 - Sleep mode behaviour + * + * to facilitate the definition, the following macros are provided + * + * PIN_CFG_DEFAULT - default config (0): + * pull up/down = disabled + * sleep mode = input + * + * PIN_CFG - default config with alternate function + * PIN_CFG_PULL - default config with alternate function and pull up/down + */ + +typedef unsigned long pin_cfg_t; + +#define PIN_NUM_MASK 0x1ff +#define PIN_NUM(x) ((x) & PIN_NUM_MASK) + +#define PIN_ALT_SHIFT 9 +#define PIN_ALT_MASK (0x3 << PIN_ALT_SHIFT) +#define PIN_ALT(x) (((x) & PIN_ALT_MASK) >> PIN_ALT_SHIFT) +#define PIN_GPIO (NMK_GPIO_ALT_GPIO << PIN_ALT_SHIFT) +#define PIN_ALT_A (NMK_GPIO_ALT_A << PIN_ALT_SHIFT) +#define PIN_ALT_B (NMK_GPIO_ALT_B << PIN_ALT_SHIFT) +#define PIN_ALT_C (NMK_GPIO_ALT_C << PIN_ALT_SHIFT) + +#define PIN_PULL_SHIFT 11 +#define PIN_PULL_MASK (0x3 << PIN_PULL_SHIFT) +#define PIN_PULL(x) (((x) & PIN_PULL_MASK) >> PIN_PULL_SHIFT) +#define PIN_PULL_NONE (NMK_GPIO_PULL_NONE << PIN_PULL_SHIFT) +#define PIN_PULL_UP (NMK_GPIO_PULL_UP << PIN_PULL_SHIFT) +#define PIN_PULL_DOWN (NMK_GPIO_PULL_DOWN << PIN_PULL_SHIFT) + +#define PIN_SLPM_SHIFT 13 +#define PIN_SLPM_MASK (0x1 << PIN_SLPM_SHIFT) +#define PIN_SLPM(x) (((x) & PIN_SLPM_MASK) >> PIN_SLPM_SHIFT) +#define PIN_SLPM_INPUT (NMK_GPIO_SLPM_INPUT << PIN_SLPM_SHIFT) +#define PIN_SLPM_NOCHANGE (NMK_GPIO_SLPM_NOCHANGE << PIN_SLPM_SHIFT) + +#define PIN_CFG_DEFAULT (PIN_PULL_NONE | PIN_SLPM_INPUT) + +#define PIN_CFG(num, alt) \ + (PIN_CFG_DEFAULT |\ + (PIN_NUM(num) | PIN_##alt)) + +#define PIN_CFG_PULL(num, alt, pull) \ + ((PIN_CFG_DEFAULT & ~PIN_PULL_MASK) |\ + (PIN_NUM(num) | PIN_##alt | PIN_PULL_##pull)) + +extern int nmk_config_pin(pin_cfg_t cfg); +extern int nmk_config_pins(pin_cfg_t *cfgs, int num); + +#endif |