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generic GPIO driven matrix keypad

PATCH In review Marek Vasut 1 participant 2 messages Aug 1, 2008 – Aug 2, 2008

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Marek Vasut

author
#0 lore raw

PATCH 1/1 generic GPIO driven matrix keypad

Hi,
the following patch adds the generic GPIO driven matrix keypad driver. I tested this on two devices I had available - palmtc and palmt3. It should be able to replace corgikbd.c later as well, but I dont have that device. And since this is platform independent driver, any chip that makes it's GPIOs available through gpiolib should be OK with this driver as well. Please consider applying.

Signed-off-by Marek Vasut <[email protected]>
drivers/input/keyboard/Kconfig +10 -0
index efd70a9..31b91ba 100644
@@ -323,4 +323,14 @@ config KEYBOARD_SH_KEYSC
 
 	  To compile this driver as a module, choose M here: the
 	  module will be called sh_keysc.
+
+config KEYBOARD_MATRIX
+	tristate "GPIO driven matrix keypad support"
+	depends on GENERIC_GPIO
+	help
+	  Enable support for GPIO driven matrix keypad
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called matrix_keypad.
+
 endif
drivers/input/keyboard/Makefile +1 -0
index 0edc8f2..b22bae1 100644
@@ -27,3 +27,4 @@ obj-$(CONFIG_KEYBOARD_HP7XX)		+= jornada720_kbd.o
 obj-$(CONFIG_KEYBOARD_MAPLE)		+= maple_keyb.o
 obj-$(CONFIG_KEYBOARD_BFIN)		+= bf54x-keys.o
 obj-$(CONFIG_KEYBOARD_SH_KEYSC)		+= sh_keysc.o
+obj-$(CONFIG_KEYBOARD_MATRIX)		+= matrix_keypad.o
drivers/input/keyboard/matrix_keypad.c new file +346 -0

346 lines not on this page · raw message

include/linux/matrix_keypad.h new file +39 -0
new file mode 100644
index 0000000..653b33c
@@ -0,0 +1,39 @@
+#ifndef _MATRIX_KEYPAD_H
+#define _MATRIX_KEYPAD_H
+
+#include <linux/input.h>
+
+struct matrix_keypad_platform_data {
+
+	/* code map for the matrix keys */
+	unsigned int	*map;
+	int		map_size;
+
+	unsigned int	*col_gpio;
+	int		col_gpio_size;
+	unsigned int	*row_gpio;
+	int		row_gpio_size;
+
+	/* line polarities */
+	unsigned int	col_polarity;
+	unsigned int	row_polarity;
+
+	/* key debounce interval */
+	unsigned int	scan_delay;
+
+	/* GPIO level change delay */
+	unsigned int	gpio_delay;
+
+	/* Callbacks */
+	int (*suspend)(struct platform_device *dev, pm_message_t state);
+	int (*resume)(struct platform_device *dev);
+};
+
+#define KEY(row, col, val)	(((row) << 28) | ((col) << 24) | (val & 0xfff))
+
+/* key not connected */
+#define KEY_NC	0xfff
+/* key to be pressed with shift */
+#define KEY_SFT	0x800
+
+#endif /* _MATRIX_KEYPAD_H */
author
#1 lore raw

Dne Friday 01 of August 2008 19:50:26 Marek Vasut napsal(a):

Quoted 7 lines

Hi,
the following patch adds the generic GPIO driven matrix keypad driver. I tested this on two devices I had available - palmtc and palmt3. It should be able to replace corgikbd.c later as well, but I dont have that device. And since this is platform independent driver, any chip that makes it's GPIOs available through gpiolib should be OK with this driver as well. Please consider applying.

Just to be exact, I was reported by Ian Molton, that the matrix keypad driver works on Toshiba e800 as well.