---------------------- U-boot Pinmux ----------------------------

=> md 0x4a003554
4a003554: 00060009 00060009 0004000e 00060009    ................
4a003564: 0005000e 0005000e 0005000e 0001000a    ................
4a003574: 00010009 00010009 00010009 00010009    ................
4a003584: 0005010c 0005010c 0005000e 00010003    ................
4a003594: 00050003 0001000a 0001010d 0001010d    ................
4a0035a4: 0001010d 0001010d 0001010d 0005000e    ................
4a0035b4: 0005000e 0001000a 0005000e 0005000e    ................
4a0035c4: 0005000e 0004000f 0004000f 0004000f    ................
4a0035d4: 0004000f 0004000f 0004000f 0004000f    ................
4a0035e4: 0004000f 0004000f 0004000f 0004000f    ................
4a0035f4: 0004000f 0004000f 0004000f 0004000f    ................
4a003604: 0004000f 0004000f 0004000f 0004000f    ................
4a003614: 0004000f 0004000f 0004000f 0004000f    ................
4a003624: 0004000f 0004000f 0004000f 0004000f    ................
4a003634: 0004000f 0004000f 000d0003 00090003    ................
4a003644: 0004000f 000d0003 000d0003 00050003    ................
=>    
=> 
=> 
=> 
=> md 0x4a003574
4a003574: 00010009 00010009 00010009 00010009    ................
4a003584: 0005010c 0005010c 0005000e 00010003    ................
4a003594: 00050003 0001000a 0001010d 0001010d    ................
4a0035a4: 0001010d 0001010d 0001010d 0005000e    ................
4a0035b4: 0005000e 0001000a 0005000e 0005000e    ................
4a0035c4: 0005000e 0004000f 0004000f 0004000f    ................
4a0035d4: 0004000f 0004000f 0004000f 0004000f    ................
4a0035e4: 0004000f 0004000f 0004000f 0004000f    ................
4a0035f4: 0004000f 0004000f 0004000f 0004000f    ................
4a003604: 0004000f 0004000f 0004000f 0004000f    ................
4a003614: 0004000f 0004000f 0004000f 0004000f    ................
4a003624: 0004000f 0004000f 0004000f 0004000f    ................
4a003634: 0004000f 0004000f 000d0003 00090003    ................
4a003644: 0004000f 000d0003 000d0003 00050003    ................
4a003654: 00050003 00050003 00050003 00050003    ................
4a003664:



---------------------- Linux Pinmux -----------------------------


root@am57xx-evm:~# 
root@am57xx-evm:~# devmem2 0x4a003554
/dev/mem opened.
Memory mapped at address 0xb6fa1000.
Read at address  0x4A003554 (0xb6fa1554): 0x00060009
root@am57xx-evm:~# devmem2 0x4a003558
/dev/mem opened.
Memory mapped at address 0xb6f83000.
Read at address  0x4A003558 (0xb6f83558): 0x00060009
root@am57xx-evm:~# devmem2 0x4a003560
/dev/mem opened.
Memory mapped at address 0xb6f78000.
Read at address  0x4A003560 (0xb6f78560): 0x00060009
root@am57xx-evm:~# devmem2 0x4a003574
/dev/mem opened.
Memory mapped at address 0xb6f3c000.
Read at address  0x4A003574 (0xb6f3c574): 0x00010009
root@am57xx-evm:~# devmem2 0x4a003578
/dev/mem opened.
Memory mapped at address 0xb6f5e000.
Read at address  0x4A003578 (0xb6f5e578): 0x00010009
root@am57xx-evm:~# devmem2 0x4a00357c
/dev/mem opened.
Memory mapped at address 0xb6f8d000.
Read at address  0x4A00357C (0xb6f8d57c): 0x00010009
root@am57xx-evm:~# devmem2 0x4a003580
/dev/mem opened.
Memory mapped at address 0xb6f65000.
Read at address  0x4A003580 (0xb6f65580): 0x00010009
root@am57xx-evm:~# 
root@am57xx-evm:~# 


----------------- Linux printks from omap4-keypad.c -----------------------------


root@am57xx-evm:~# 															<---- PRESSING KEY
root@am57xx-evm:~# [   59.680964] Billa 2 changed=000000ff row=1  col=0
[   59.685710] Billa 2 changed=000000ff row=1  col=1
[   59.690442] Billa 2 changed=000000ff row=1  col=2
[   59.695174] Billa 2 changed=000000ff row=1  col=3

root@am57xx-evm:~#  														<---- RELEASING KEY
root@am57xx-evm:~# [   62.800993] Billa 2 changed=000000ff row=1  col=0
[   62.805734] Billa 2 changed=000000ff row=1  col=1
[   62.810466] Billa 2 changed=000000ff row=1  col=2
[   62.815198] Billa 2 changed=000000ff row=1  col=3
root@am57xx-evm:~#  
root@am57xx-evm:~#  


static irqreturn_t omap4_keypad_irq_thread_fn(int irq, void *dev_id)
{
	struct omap4_keypad *keypad_data = dev_id;
	struct input_dev *input_dev = keypad_data->input;
	unsigned char key_state[ARRAY_SIZE(keypad_data->key_state)];
	unsigned int col, row, code, changed;
	u32 *new_state = (u32 *) key_state;

	*new_state = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE31_0);
	*(new_state + 1) = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE63_32);

	for (row = 0; row < keypad_data->rows; row++) {
		changed = key_state[row] ^ keypad_data->key_state[row];
		if (!changed)
			continue;

		for (col = 0; col < keypad_data->cols; col++) {
			if (changed & (1 << col)) {
printk("Billa 2 changed=%08x row=%d  col=%d\n", changed, row, col);
				code = MATRIX_SCAN_CODE(row, col,
						keypad_data->row_shift);
				input_event(input_dev, EV_MSC, MSC_SCAN, code);
				input_report_key(input_dev,
						 keypad_data->keymap[code],
						 key_state[row] & (1 << col));
			}
		}
	}

	input_sync(input_dev);

	memcpy(keypad_data->key_state, key_state,
		sizeof(keypad_data->key_state));

	/* clear pending interrupts */
	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
			 kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));

	/* enable interrupts */
	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE_SET,
		OMAP4_DEF_IRQENABLE_EVENTEN |
				OMAP4_DEF_IRQENABLE_LONGKEY);

	return IRQ_HANDLED;
}