On Tue, Aug 21, 2012 at 04:15:38PM +0530, Sourav Poddar wrote:
> From: G, Manjunath Kondaiah <manjugk@xxxxxx>
>
> SMSC ECE1099 is a keyboard scan or GPIO expansion device.The device
> supports a keypad scan matrix of 23*8.This driver uses this
> device as a keypad driver.
>
> Cc: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
> Cc: Benoit Cousson <b-cousson@xxxxxx>
> Cc: Felipe Balbi <balbi@xxxxxx>
> Cc: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
> Signed-off-by: G, Manjunath Kondaiah <manjugk@xxxxxx>
> Signed-off-by: Sourav Poddar <sourav.poddar@xxxxxx>
looks good. If you just fix my comment on free_irq() below, you can add:
Acked-by: Felipe Balbi <balbi@xxxxxx>
> +static int __devinit
> +smsc_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct smsc *smsc = dev_get_drvdata(pdev->dev.parent);
> + struct input_dev *input;
> + struct smsc_keypad *kp;
> + int ret = 0, error;
> + int col, i, max_keys, row_shift;
> + int irq;
> + int addr_start, addr;
> +
> + kp = devm_kzalloc(dev, sizeof(*kp), GFP_KERNEL);
> +
> + input = input_allocate_device();
> + if (!kp || !input) {
> + error = -ENOMEM;
> + goto err1;
> + }
> +
> + error = smsc_keypad_parse_dt(&pdev->dev, kp);
> + if (error)
> + return error;
> +
> + /* Get the debug Device */
> + kp->input = input;
> + kp->smsc = smsc;
> + kp->irq = platform_get_irq(pdev, 0);
> + kp->dev = dev;
> +
> + for (col = 0; col < 16; col++) {
> + kp->last_key_state[col] = 0;
> + kp->last_key_ms[col] = 0;
> + }
> +
> + /* 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;
> +
> + error = input_register_device(input);
> + if (error) {
> + dev_err(kp->dev,
> + "Unable to register twl4030 keypad device\n");
> + goto err1;
> + }
> +
> + /* Mask all GPIO interrupts (0x37-0x3B) */
> + for (addr = 0x37; addr < 0x3B; addr++)
> + smsc_write(dev, addr, 0);
> +
> + /* Set all outputs high (0x05-0x09) */
> + for (addr = 0x05; addr < 0x09; addr++)
> + smsc_write(dev, addr, 0xff);
> +
> + /* Clear all GPIO interrupts (0x32-0x36) */
> + for (addr = 0x32; addr < 0x36; addr++)
> + smsc_write(dev, addr, 0xff);
> +
> + addr_start = 0x12;
> + for (i = 0; i <= kp->rows; i++) {
> + addr = 0x12 + i;
> + smsc_write(dev, addr, SMSC_KP_KSI);
> + }
> +
> + addr_start = 0x1A;
> + for (i = 0; i <= kp->cols; i++) {
> + addr = 0x1A + i;
> + smsc_write(dev, addr, SMSC_KP_KSO);
> + }
> +
> + addr = SMSC_KP_INT_STAT;
> + smsc_write(dev, addr, SMSC_KP_SET_HIGH);
> +
> + addr = SMSC_WKUP_CTRL;
> + smsc_write(dev, addr, SMSC_KP_SET_LOW_PWR);
> +
> + addr = SMSC_KP_OUT;
> + smsc_write(dev, addr, SMSC_KSO_ALL_LOW);
> +
> + row_shift = get_count_order(kp->cols);
> + max_keys = kp->rows << row_shift;
> +
> + kp->row_shift = row_shift;
> + kp->keymap = kzalloc(max_keys * sizeof(kp->keymap[0]),
> + GFP_KERNEL);
> + if (!kp->keymap) {
> + dev_err(&pdev->dev, "Not enough memory for keymap\n");
> + error = -ENOMEM;
> + }
> +
> + matrix_keypad_build_keymap(NULL, NULL, kp->rows,
> + kp->cols, kp->keymap, input);
> +
> + /*
> + * 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(&pdev->dev, "request_irq failed for irq no=%d\n",
> + irq);
> + goto err2;
> + }
> +
> + /* Enable smsc keypad interrupts */
> + ret = smsc_write(dev, SMSC_KP_INT_MASK, 0xff);
> + if (ret < 0)
> + goto err2;
> +
> + return 0;
> +
> +err2:
> + input_unregister_device(input);
> + free_irq(kp->irq, NULL);
you're using devm_request_threaded_irq, this is unnecessary
> +err1:
> + input_free_device(input);
> + return ret;
> +}
> +
> +static int smsc_remove(struct platform_device *pdev)
> +{
> + struct smsc_keypad *kp = platform_get_drvdata(pdev);
> + free_irq(kp->irq, kp);
ditto.
--
balbi
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