Merge branch 'gpio/next' of git://git.secretlab.ca/git/linux-2.6

* 'gpio/next' of git://git.secretlab.ca/git/linux-2.6:
  gpio/via: rename VIA local config struct
  basic_mmio_gpio: split into a gpio library and platform device
  gpio: remove some legacy comments in build files
  gpio: add trace events for setting direction and value
  gpio/pca953x: Use handle_simple_irq instead of handle_edge_irq
  gpiolib: export gpiochip_find
  gpio: remove redundant Kconfig depends on GPIOLIB
  basic_mmio_gpio: convert to non-__raw* accessors
  basic_mmio_gpio: support direction registers
  basic_mmio_gpio: support different input/output registers
  basic_mmio_gpio: detect output method at probe time
  basic_mmio_gpio: request register regions
  basic_mmio_gpio: allow overriding number of gpio
  basic_mmio_gpio: convert to platform_{get,set}_drvdata()
  basic_mmio_gpio: remove runtime width/endianness evaluation

2 files changed, 112 insertions, 0 deletions

diff --git a/include/linux/basic_mmio_gpio.h b/include/linux/basic_mmio_gpio.h
index 198087a16fc4..1ae12710d732 100644
--- a/include/linux/basic_mmio_gpio.h
+++ b/include/linux/basic_mmio_gpio.h
@@ -13,8 +13,64 @@
 #ifndef __BASIC_MMIO_GPIO_H
 #define __BASIC_MMIO_GPIO_H
 
+#include <linux/gpio.h>
+#include <linux/types.h>
+#include <linux/compiler.h>
+
 struct bgpio_pdata {
         int base;
+        int ngpio;
 };
 
+struct device;
+
+struct bgpio_chip {
+        struct gpio_chip gc;
+
+        unsigned long (*read_reg)(void __iomem *reg);
+        void (*write_reg)(void __iomem *reg, unsigned long data);
+
+        void __iomem *reg_dat;
+        void __iomem *reg_set;
+        void __iomem *reg_clr;
+        void __iomem *reg_dir;
+
+        /* Number of bits (GPIOs): <register width> * 8. */
+        int bits;
+
+        /*
+         * Some GPIO controllers work with the big-endian bits notation,
+         * e.g. in a 8-bits register, GPIO7 is the least significant bit.
+         */
+        unsigned long (*pin2mask)(struct bgpio_chip *bgc, unsigned int pin);
+
+        /*
+         * Used to lock bgpio_chip->data. Also, this is needed to keep
+         * shadowed and real data registers writes together.
+         */
+        spinlock_t lock;
+
+        /* Shadowed data register to clear/set bits safely. */
+        unsigned long data;
+
+        /* Shadowed direction registers to clear/set direction safely. */
+        unsigned long dir;
+};
+
+static inline struct bgpio_chip *to_bgpio_chip(struct gpio_chip *gc)
+{
+        return container_of(gc, struct bgpio_chip, gc);
+}
+
+int __devexit bgpio_remove(struct bgpio_chip *bgc);
+int __devinit bgpio_init(struct bgpio_chip *bgc,
+                         struct device *dev,
+                         unsigned long sz,
+                         void __iomem *dat,
+                         void __iomem *set,
+                         void __iomem *clr,
+                         void __iomem *dirout,
+                         void __iomem *dirin,
+                         bool big_endian);
+
 #endif /* __BASIC_MMIO_GPIO_H */
diff --git a/include/trace/events/gpio.h b/include/trace/events/gpio.h
new file mode 100644
index 000000000000..927a8ad9e51b
--- /dev/null
+++ b/include/trace/events/gpio.h
@@ -0,0 +1,56 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM gpio
+
+#if !defined(_TRACE_GPIO_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_GPIO_H
+
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(gpio_direction,
+
+        TP_PROTO(unsigned gpio, int in, int err),
+
+        TP_ARGS(gpio, in, err),
+
+        TP_STRUCT__entry(
+                __field(unsigned, gpio)
+                __field(int, in)
+                __field(int, err)
+        ),
+
+        TP_fast_assign(
+                __entry->gpio = gpio;
+                __entry->in = in;
+                __entry->err = err;
+        ),
+
+        TP_printk("%u %3s (%d)", __entry->gpio,
+                __entry->in ? "in" : "out", __entry->err)
+);
+
+TRACE_EVENT(gpio_value,
+
+        TP_PROTO(unsigned gpio, int get, int value),
+
+        TP_ARGS(gpio, get, value),
+
+        TP_STRUCT__entry(
+                __field(unsigned, gpio)
+                __field(int, get)
+                __field(int, value)
+        ),
+
+        TP_fast_assign(
+                __entry->gpio = gpio;
+                __entry->get = get;
+                __entry->value = value;
+        ),
+
+        TP_printk("%u %3s %d", __entry->gpio,
+                __entry->get ? "get" : "set", __entry->value)
+);
+
+#endif /* if !defined(_TRACE_GPIO_H) || defined(TRACE_HEADER_MULTI_READ) */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>