+static int __devinit
+smsc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct input_dev *input;
+ struct smsc_keypad *kp;
+ int ret = 0;
+ int i, max_keys, row_shift;
+ int irq;
+ int addr;
+
+ kp = devm_kzalloc(dev, sizeof(*kp), GFP_KERNEL);
+
+ input = devm_input_allocate_device(dev);
+ if (!kp || !input)
+ ret = -ENOMEM;
+
+ ret = smsc_keypad_parse_dt(dev, kp);
+ if (ret)
+ return ret;
+
+ /* Get the debug Device */
+ kp->input = input;
+ kp->irq = platform_get_irq(pdev, 0);
+ kp->dev = dev;
+
+ /* setup input device */
+ __set_bit(EV_KEY, input->evbit);
+
+ /* Enable auto repeat feature of Linux input subsystem */
+ if (!kp->no_autorepeat)
+ __set_bit(EV_REP, input->evbit);
+
+ input_set_capability(input, EV_MSC, MSC_SCAN);
+ input->name = "SMSC Keypad";
+ input->phys = "smsc_keypad/input0";
+ input->dev.parent = &pdev->dev;
+ input->id.bustype = BUS_HOST;
+ input->id.vendor = 0x0001;
+ input->id.product = 0x0001;
+ input->id.version = 0x0003;
+
+ input->open = smsc_keypad_open;
+ input->close = smsc_keypad_close;
+ input_set_drvdata(input, kp);
+
+ /* Mask all GPIO interrupts (0x37-0x3B) */
+ for (addr = SMSC_GPIO_INT_MASK_START;
+ addr < SMSC_GPIO_INT_MASK_START + 4; addr++)
+ smsc_write(dev, addr, 0);
+
+ /* Set all outputs high (0x05-0x09) */
+ for (addr = SMSC_GPIO_DATA_OUT_START;
+ addr < SMSC_GPIO_DATA_OUT_START + 4; addr++)
+ smsc_write(dev, addr, 0xff);
+
+ /* Clear all GPIO interrupts (0x32-0x36) */
+ for (addr = SMSC_GPIO_INT_STAT_START;
+ addr < SMSC_GPIO_INT_STAT_START + 4; addr++)
+ smsc_write(dev, addr, 0xff);
+
+ /* Configure the smsc pins as Keyboard scan Input */
+ for (i = 0; i < kp->rows; i++) {
+ addr = 0x12 + i;
+ smsc_write(dev, addr, SMSC_KP_KSI);
+ }
+
+ /* Configure the smsc pins as Keyboard scan output */
+ for (i = 0; i < kp->cols; i++) {
+ addr = 0x1a + i;
+ smsc_write(dev, addr, SMSC_KP_KSO);
+ }
+
+ smsc_write(dev, SMSC_KP_INT_STAT, SMSC_KP_SET_HIGH);
+ smsc_write(dev, SMSC_WKUP_CTRL, SMSC_KP_SET_LOW_PWR);
+ smsc_write(dev, SMSC_KP_OUT, SMSC_KSO_ALL_LOW);
+
+ row_shift = get_count_order(kp->cols);
+ max_keys = kp->rows << row_shift;
+
+ kp->row_shift = row_shift;
+ kp->keymap = devm_kzalloc(dev, max_keys * sizeof(kp->keymap[0]),
+ GFP_KERNEL);
+ if (!kp->keymap) {
+ dev_err(dev, "Not enough memory for keymap\n");
+ return -ENOMEM;
+ }
+
+ ret = matrix_keypad_build_keymap(NULL, NULL, kp->rows,
+ kp->cols, kp->keymap, input);
+ if (ret) {
+ dev_err(dev, "failed to build keymap\n");
+ return ret;
+ }
+
+ /*
+ * This ISR will always execute in kernel thread context because of
+ * the need to access the SMSC over the I2C bus.
+ */
+ ret = devm_request_threaded_irq(dev, kp->irq, NULL, do_kp_irq,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT, pdev->name, kp);
+ if (ret) {
+ dev_dbg(dev, "request_irq failed for irq no=%d\n",
+ irq);
+ return ret;
+ }
+
+ ret = input_register_device(input);
+ if (ret) {
+ dev_err(kp->dev,
+ "Unable to register twl4030 keypad device\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int __devexit smsc_remove(struct platform_device *pdev)
+{
