Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / input / matrix_keypad.h

diff --git a/kernel/include/linux/input/matrix_keypad.h b/kernel/include/linux/input/matrix_keypad.h
new file mode 100644 (file)
index 0000000..27e06ac
--- /dev/null
+++ b/kernel/include/linux/input/matrix_keypad.h
@@ -0,0 +1,103 @@
+#ifndef _MATRIX_KEYPAD_H
+#define _MATRIX_KEYPAD_H
+
+#include <linux/types.h>
+#include <linux/input.h>
+#include <linux/of.h>
+
+#define MATRIX_MAX_ROWS                32
+#define MATRIX_MAX_COLS                32
+
+#define KEY(row, col, val)     ((((row) & (MATRIX_MAX_ROWS - 1)) << 24) |\
+                                (((col) & (MATRIX_MAX_COLS - 1)) << 16) |\
+                                ((val) & 0xffff))
+
+#define KEY_ROW(k)             (((k) >> 24) & 0xff)
+#define KEY_COL(k)             (((k) >> 16) & 0xff)
+#define KEY_VAL(k)             ((k) & 0xffff)
+
+#define MATRIX_SCAN_CODE(row, col, row_shift)  (((row) << (row_shift)) + (col))
+
+/**
+ * struct matrix_keymap_data - keymap for matrix keyboards
+ * @keymap: pointer to array of uint32 values encoded with KEY() macro
+ *     representing keymap
+ * @keymap_size: number of entries (initialized) in this keymap
+ *
+ * This structure is supposed to be used by platform code to supply
+ * keymaps to drivers that implement matrix-like keypads/keyboards.
+ */
+struct matrix_keymap_data {
+       const uint32_t *keymap;
+       unsigned int    keymap_size;
+};
+
+/**
+ * struct matrix_keypad_platform_data - platform-dependent keypad data
+ * @keymap_data: pointer to &matrix_keymap_data
+ * @row_gpios: pointer to array of gpio numbers representing rows
+ * @col_gpios: pointer to array of gpio numbers reporesenting colums
+ * @num_row_gpios: actual number of row gpios used by device
+ * @num_col_gpios: actual number of col gpios used by device
+ * @col_scan_delay_us: delay, measured in microseconds, that is
+ *     needed before we can keypad after activating column gpio
+ * @debounce_ms: debounce interval in milliseconds
+ * @clustered_irq: may be specified if interrupts of all row/column GPIOs
+ *     are bundled to one single irq
+ * @clustered_irq_flags: flags that are needed for the clustered irq
+ * @active_low: gpio polarity
+ * @wakeup: controls whether the device should be set up as wakeup
+ *     source
+ * @no_autorepeat: disable key autorepeat
+ *
+ * This structure represents platform-specific data that use used by
+ * matrix_keypad driver to perform proper initialization.
+ */
+struct matrix_keypad_platform_data {
+       const struct matrix_keymap_data *keymap_data;
+
+       const unsigned int *row_gpios;
+       const unsigned int *col_gpios;
+
+       unsigned int    num_row_gpios;
+       unsigned int    num_col_gpios;
+
+       unsigned int    col_scan_delay_us;
+
+       /* key debounce interval in milli-second */
+       unsigned int    debounce_ms;
+
+       unsigned int    clustered_irq;
+       unsigned int    clustered_irq_flags;
+
+       bool            active_low;
+       bool            wakeup;
+       bool            no_autorepeat;
+};
+
+int matrix_keypad_build_keymap(const struct matrix_keymap_data *keymap_data,
+                              const char *keymap_name,
+                              unsigned int rows, unsigned int cols,
+                              unsigned short *keymap,
+                              struct input_dev *input_dev);
+
+#ifdef CONFIG_OF
+/**
+ * matrix_keypad_parse_of_params() - Read parameters from matrix-keypad node
+ *
+ * @dev: Device containing of_node
+ * @rows: Returns number of matrix rows
+ * @cols: Returns number of matrix columns
+ * @return 0 if OK, <0 on error
+ */
+int matrix_keypad_parse_of_params(struct device *dev,
+                                 unsigned int *rows, unsigned int *cols);
+#else
+static inline int matrix_keypad_parse_of_params(struct device *dev,
+                                 unsigned int *rows, unsigned int *cols)
+{
+       return -ENOSYS;
+}
+#endif /* CONFIG_OF */
+
+#endif /* _MATRIX_KEYPAD_H */