linux-kernel - Re: [v3 1/3] 1/3 Touchscreen: Cypress TTSP G3 MTDEV Core Driver

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Date:	Tue, 04 Jan 2011 09:50:14 +0800
From:	Hong Liu <hong.liu@...el.com>
To:	Kevin McNeely <kev@...ress.com>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	David Brown <davidb@...eaurora.org>,
	Trilok Soni <tsoni@...eaurora.org>,
	Henrik Rydberg <rydberg@...omail.se>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Eric Miao <eric.y.miao@...il.com>,
	Mike Frysinger <vapier@...too.org>,
	Alan Cox <alan@...ux.intel.com>,
	"linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [v3 1/3] 1/3 Touchscreen: Cypress TTSP G3 MTDEV Core Driver

On Thu, 2010-12-30 at 03:17 +0800, Kevin McNeely wrote:
[...]

> +
> +void *cyttsp_core_init(struct cyttsp_bus_ops *bus_ops, struct device *dev)
> +{
> +       struct input_dev *input_device;
> +
> +       struct cyttsp *ts = kzalloc(sizeof(*ts), GFP_KERNEL);
> +
> +       if (!ts) {
> +               dev_dbg(ts->dev, "%s: Error, kzalloc\n", __func__);
> +               goto error_alloc_data;
> +       }

ts->dev is not assigned yet.

Thanks,
Hong

> +
> +       if (dev == NULL || bus_ops == NULL) {
> +               kfree(ts);
> +               goto error_alloc_data;
> +       }
> +
> +       mutex_init(&ts->mutex);
> +       ts->dev = dev;
> +       ts->platform_data = dev->platform_data;
> +       ts->bus_ops = bus_ops;
> +       init_completion(&ts->bl_ready);
> +
> +       if (ts->platform_data->init) {
> +               if (ts->platform_data->init()) {
> +                       dev_dbg(ts->dev, "%s: Error, platform init failed!\n",
> +                               __func__);
> +                       goto error_init;
> +               }
> +       }
> +
> +       ts->irq = gpio_to_irq(ts->platform_data->irq_gpio);
> +       if (ts->irq <= 0) {
> +               dev_dbg(ts->dev, "%s: Error, failed to allocate irq\n",
> +                       __func__);
> +                       goto error_init;
> +       }
> +
> +       /* Create the input device and register it. */
> +       input_device = input_allocate_device();
> +       if (!input_device) {
> +               dev_dbg(ts->dev, "%s: Error, failed to allocate input device\n",
> +                       __func__);
> +               goto error_input_allocate_device;
> +       }
> +
> +       ts->input = input_device;
> +       input_device->name = ts->platform_data->name;
> +       snprintf(ts->phys, sizeof(ts->phys), "%s", dev_name(dev));
> +       input_device->phys = ts->phys;
> +       input_device->dev.parent = ts->dev;
> +       ts->bus_type = bus_ops->dev->bus;
> +       input_device->open = cyttsp_open;
> +       input_device->close = cyttsp_close;
> +       input_set_drvdata(input_device, ts);
> +
> +       __set_bit(EV_SYN, input_device->evbit);
> +       __set_bit(EV_KEY, input_device->evbit);
> +       __set_bit(EV_ABS, input_device->evbit);
> +
> +       input_set_abs_params(input_device, ABS_MT_POSITION_X,
> +               0, ts->platform_data->maxx, 0, 0);
> +       input_set_abs_params(input_device, ABS_MT_POSITION_Y,
> +               0, ts->platform_data->maxy, 0, 0);
> +       input_set_abs_params(input_device, ABS_MT_TOUCH_MAJOR,
> +               0, CY_MAXZ, 0, 0);
> +
> +       if (input_register_device(input_device)) {
> +               dev_dbg(ts->dev, "%s: Error, failed to register input device\n",
> +                       __func__);
> +               goto error_input_register_device;
> +       }
> +
> +       goto no_error;
> +
> +error_input_register_device:
> +       input_unregister_device(input_device);
> +error_input_allocate_device:
> +       if (ts->platform_data->exit)
> +               ts->platform_data->exit();
> +error_init:
> +       mutex_destroy(&ts->mutex);
> +       kfree(ts);
> +error_alloc_data:
> +no_error:
> +       return ts;
> +}
> +EXPORT_SYMBOL_GPL(cyttsp_core_init);
> +
> +MODULE_LICENSE("GPL");
> +MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard touchscreen driver core");
> +MODULE_AUTHOR("Cypress");


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