diff options
| -rw-r--r-- | arch/arm/mach-ux500/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/mach-ux500/board-mop500-pins.c | 1 | ||||
| -rw-r--r-- | arch/arm/mach-ux500/pins.c | 88 | ||||
| -rw-r--r-- | arch/arm/mach-ux500/pins.h | 46 |
4 files changed, 136 insertions, 1 deletions
diff --git a/arch/arm/mach-ux500/Makefile b/arch/arm/mach-ux500/Makefile index 465b9ec9510..bfd902dc991 100644 --- a/arch/arm/mach-ux500/Makefile +++ b/arch/arm/mach-ux500/Makefile @@ -3,7 +3,7 @@ # obj-y := clock.o cpu.o devices.o devices-common.o \ - id.o usb.o timer.o + id.o pins.o usb.o timer.o obj-$(CONFIG_CACHE_L2X0) += cache-l2x0.o obj-$(CONFIG_UX500_SOC_DB5500) += cpu-db5500.o dma-db5500.o obj-$(CONFIG_UX500_SOC_DB8500) += cpu-db8500.o devices-db8500.o diff --git a/arch/arm/mach-ux500/board-mop500-pins.c b/arch/arm/mach-ux500/board-mop500-pins.c index f5413dca532..e2a2e501b69 100644 --- a/arch/arm/mach-ux500/board-mop500-pins.c +++ b/arch/arm/mach-ux500/board-mop500-pins.c @@ -14,6 +14,7 @@ #include <mach/hardware.h> #include "pins-db8500.h" +#include "pins.h" static pin_cfg_t mop500_pins_common[] = { /* I2C */ diff --git a/arch/arm/mach-ux500/pins.c b/arch/arm/mach-ux500/pins.c new file mode 100644 index 00000000000..38c1d47b29a --- /dev/null +++ b/arch/arm/mach-ux500/pins.c @@ -0,0 +1,88 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson + * License terms: GNU General Public License (GPL), version 2 + */ + +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/device.h> +#include <linux/mutex.h> +#include <linux/spinlock.h> +#include <linux/err.h> +#include <plat/pincfg.h> + +#include "pins.h" + +static LIST_HEAD(pin_lookups); +static DEFINE_MUTEX(pin_lookups_mutex); +static DEFINE_SPINLOCK(pins_lock); + +void __init ux500_pins_add(struct ux500_pin_lookup *pl, size_t num) +{ + mutex_lock(&pin_lookups_mutex); + + while (num--) { + list_add_tail(&pl->node, &pin_lookups); + pl++; + } + + mutex_unlock(&pin_lookups_mutex); +} + +struct ux500_pins *ux500_pins_get(const char *name) +{ + struct ux500_pins *pins = NULL; + struct ux500_pin_lookup *pl; + + mutex_lock(&pin_lookups_mutex); + + list_for_each_entry(pl, &pin_lookups, node) { + if (!strcmp(pl->name, name)) { + pins = pl->pins; + goto out; + } + } + +out: + mutex_unlock(&pin_lookups_mutex); + return pins; +} + +int ux500_pins_enable(struct ux500_pins *pins) +{ + unsigned long flags; + int ret = 0; + + spin_lock_irqsave(&pins_lock, flags); + + if (pins->usage++ == 0) + ret = nmk_config_pins(pins->cfg, pins->num); + + spin_unlock_irqrestore(&pins_lock, flags); + return ret; +} + +int ux500_pins_disable(struct ux500_pins *pins) +{ + unsigned long flags; + int ret = 0; + + spin_lock_irqsave(&pins_lock, flags); + + if (WARN_ON(pins->usage == 0)) + goto out; + + if (--pins->usage == 0) + ret = nmk_config_pins_sleep(pins->cfg, pins->num); + +out: + spin_unlock_irqrestore(&pins_lock, flags); + return ret; +} + +void ux500_pins_put(struct ux500_pins *pins) +{ + WARN_ON(!pins); +} diff --git a/arch/arm/mach-ux500/pins.h b/arch/arm/mach-ux500/pins.h new file mode 100644 index 00000000000..0d36af2e7d9 --- /dev/null +++ b/arch/arm/mach-ux500/pins.h @@ -0,0 +1,46 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson + * License terms: GNU General Public License (GPL), version 2 + */ + +#ifndef __MACH_UX500_PINS_H +#define __MACH_UX500_PINS_H + +#include <linux/list.h> +#include <plat/pincfg.h> + +#define PIN_LOOKUP(_name, _pins) \ +{ \ + .name = _name, \ + .pins = _pins, \ +} + +#define UX500_PINS(name, pins...) \ +struct ux500_pins name = { \ + .cfg = (pin_cfg_t[]) {pins}, \ + .num = ARRAY_SIZE(((pin_cfg_t[]) {pins})), \ +} + +struct ux500_pins { + int usage; + int num; + pin_cfg_t *cfg; +}; + +struct ux500_pin_lookup { + struct list_head node; + const char *name; + struct ux500_pins *pins; +}; + +void __init ux500_pins_add(struct ux500_pin_lookup *pl, size_t num); +void __init ux500_offchip_gpio_init(struct ux500_pins *pins); +struct ux500_pins *ux500_pins_get(const char *name); +int ux500_pins_enable(struct ux500_pins *pins); +int ux500_pins_disable(struct ux500_pins *pins); +void ux500_pins_put(struct ux500_pins *pins); +int pins_for_u9500(void); + +#endif |