1* Marvell PXA Keypad controller 2 3Required Properties 4- compatible : should be "marvell,pxa27x-keypad" 5- reg : Address and length of the register set for the device 6- interrupts : The interrupt for the keypad controller 7- marvell,debounce-interval : How long time the key will be 8 recognized when it is pressed. It is a u32 value, and bit[31:16] 9 is debounce interval for direct key and bit[15:0] is debounce 10 interval for matrix key. The value is in binary number of 2ms 11 12Optional Properties For Matrix Keyes 13Please refer to matrix-keymap.txt 14 15Optional Properties for Direct Keyes 16- marvell,direct-key-count : How many direct keyes are used. 17- marvell,direct-key-mask : The mask indicates which keyes 18 are used. If bit[X] of the mask is set, the direct key X 19 is used. 20- marvell,direct-key-low-active : Direct key status register 21 tells the level of pins that connects to the direct keyes. 22 When this property is set, it means that when the pin level 23 is low, the key is pressed(active). 24- marvell,direct-key-map : It is a u16 array. Each item indicates 25 the linux key-code for the direct key. 26 27Optional Properties For Rotary 28- marvell,rotary0 : It is a u32 value. Bit[31:16] is the 29 linux key-code for rotary up. Bit[15:0] is the linux key-code 30 for rotary down. It is for rotary 0. 31- marvell,rotary1 : Same as marvell,rotary0. It is for rotary 1. 32- marvell,rotary-rel-key : When rotary is used for relative axes 33 in the device, the value indicates the key-code for relative 34 axes measurement in the device. It is a u32 value. Bit[31:16] 35 is for rotary 1, and Bit[15:0] is for rotary 0. 36 37Examples: 38 keypad: keypad@d4012000 { 39 keypad,num-rows = <3>; 40 keypad,num-columns = <5>; 41 linux,keymap = <0x0000000e /* KEY_BACKSPACE */ 42 0x0001006b /* KEY_END */ 43 0x00020061 /* KEY_RIGHTCTRL */ 44 0x0003000b /* KEY_0 */ 45 0x00040002 /* KEY_1 */ 46 0x0100008b /* KEY_MENU */ 47 0x01010066 /* KEY_HOME */ 48 0x010200e7 /* KEY_SEND */ 49 0x01030009 /* KEY_8 */ 50 0x0104000a /* KEY_9 */ 51 0x02000160 /* KEY_OK */ 52 0x02010003 /* KEY_2 */ 53 0x02020004 /* KEY_3 */ 54 0x02030005 /* KEY_4 */ 55 0x02040006>; /* KEY_5 */ 56 marvell,rotary0 = <0x006c0067>; /* KEY_UP & KEY_DOWN */ 57 marvell,direct-key-count = <1>; 58 marvell,direct-key-map = <0x001c>; 59 marvell,debounce-interval = <0x001e001e>; 60 }; 61