Hi,
El Thu, Aug 23, 2012 at 04:19:57PM +0530 Patil, Rachna ha dit:
> Add the mfd core driver which supports touchscreen
> and ADC.
> With this patch we are only adding infrastructure to
> support the MFD clients.
>
> Signed-off-by: Patil, Rachna <rachna@xxxxxx>
> ---
> diff --git a/drivers/mfd/ti_tscadc.c b/drivers/mfd/ti_tscadc.c
> ...
> +static int __devinit ti_tscadc_probe(struct platform_device *pdev)
> +{
> + struct ti_tscadc_dev *tscadc;
> + int err, ctrl;
> + int clk_value, clock_rate;
> + struct resource *res;
> + struct clk *clk;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!res) {
> + dev_err(&pdev->dev, "no memory resource defined.\n");
> + return -EINVAL;
> + }
> +
> + /* Allocate memory for device */
> + tscadc = kzalloc(sizeof(struct ti_tscadc_dev), GFP_KERNEL);
> + if (!tscadc) {
> + dev_err(&pdev->dev, "failed to allocate memory.\n");
> + return -ENOMEM;
> + }
> +
> + res = request_mem_region(res->start, resource_size(res), pdev->name);
> + if (!res) {
> + dev_err(&pdev->dev, "failed to reserve registers.\n");
> + err = -EBUSY;
> + goto err_free_mem;
> + }
> +
> + tscadc->tscadc_base = ioremap(res->start, resource_size(res));
> + if (!tscadc->tscadc_base) {
> + dev_err(&pdev->dev, "failed to map registers.\n");
> + err = -ENOMEM;
> + goto err_release_mem;
> + }
> +
> + tscadc->irq = platform_get_irq(pdev, 0);
> + if (tscadc->irq < 0) {
> + dev_err(&pdev->dev, "no irq ID is specified.\n");
> + return -ENODEV;
goto err_iounmap_mem;
> ...
> +err_fail:
> + pm_runtime_put_sync(&pdev->dev);
> + pm_runtime_disable(&pdev->dev);
> + iounmap(tscadc->tscadc_base);
> +err_release_mem:
> + release_mem_region(res->start, resource_size(res));
> + mfd_remove_devices(tscadc->dev);
> +err_free_mem:
> + platform_set_drvdata(pdev, NULL);
shouldn't be necessary as the platform device doesn't exist any longer
> ...
> +static int __devexit ti_tscadc_remove(struct platform_device *pdev)
> +{
> + struct ti_tscadc_dev *tscadc = platform_get_drvdata(pdev);
> + struct resource *res;
> +
> + tscadc_writel(tscadc, REG_SE, 0x00);
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + iounmap(tscadc->tscadc_base);
> + release_mem_region(res->start, resource_size(res));
> +
> + pm_runtime_put_sync(&pdev->dev);
> + pm_runtime_disable(&pdev->dev);
> +
> + mfd_remove_devices(tscadc->dev);
> + kfree(tscadc);
> +
> + platform_set_drvdata(pdev, NULL);
same as above
best regards
--
Matthias Kaehlcke
Embedded Linux Developer
Amsterdam
The only way to do great work is to love what you do
(Steve Jobs)
.''`.
using free software / Debian GNU/Linux | http://debian.org : :' :
`. `'`
gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4 `-
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