On Fri, Sep 06, 2013 at 04:08:24PM +0800, Xiubo Li wrote:
> The FTM PWM device can be found on Vybrid VF610 Tower and Layerscape LS-1 SoCs.
>
> +
> +static int fsl_pwm_probe(struct platform_device *pdev)
> +{
> + int ret = 0;
> + struct fsl_pwm_chip *fpc;
> + struct resource *res;
> +
> + fpc = devm_kzalloc(&pdev->dev, sizeof(*fpc), GFP_KERNEL);
You don't have to output a message when kzalloc fails, but still you
should check for the result and return an error if necessary.
With this fixed:
Reviewed-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
Sascha
> +
> + ret = fsl_pwm_parse_clk_ps(fpc);
> + if (ret < 0)
> + return ret;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + fpc->base = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(fpc->base)) {
> + ret = PTR_ERR(fpc->base);
> + return ret;
> + }
> +
> + fpc->pinctrl = devm_pinctrl_get(&pdev->dev);
> + if (IS_ERR(fpc->pinctrl)) {
> + ret = PTR_ERR(fpc->pinctrl);
> + return ret;
> + }
> +
> + fpc->chip.ops = &fsl_pwm_ops;
> + fpc->chip.of_xlate = of_pwm_xlate_with_flags;
> + fpc->chip.of_pwm_n_cells = 3;
> + fpc->chip.base = -1;
> + fpc->chip.npwm = FTM_MAX_CHANNEL;
> + ret = pwmchip_add(&fpc->chip);
> + if (ret < 0) {
> + dev_err(&pdev->dev, "failed to add PWM chip %d\n", ret);
> + return ret;
> + }
> +
> + platform_set_drvdata(pdev, fpc);
> +
> + return 0;
> +}
> +
> +static int fsl_pwm_remove(struct platform_device *pdev)
> +{
> + struct fsl_pwm_chip *fpc;
> +
> + fpc = platform_get_drvdata(pdev);
> +
> + return pwmchip_remove(&fpc->chip);
> +}
> +
> +static const struct of_device_id fsl_pwm_dt_ids[] = {
> + { .compatible = "fsl,vf610-ftm-pwm", },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, fsl_pwm_dt_ids);
> +
> +static struct platform_driver fsl_pwm_driver = {
> + .driver = {
> + .name = "fsl-ftm-pwm",
> + .owner = THIS_MODULE,
> + .of_match_table = of_match_ptr(fsl_pwm_dt_ids),
> + },
> + .probe = fsl_pwm_probe,
> + .remove = fsl_pwm_remove,
> +};
> +module_platform_driver(fsl_pwm_driver);
> +
> +MODULE_DESCRIPTION("Freescale FTM PWM Driver");
> +MODULE_AUTHOR("Xiubo Li <Li.Xiubo@xxxxxxxxxxxxx>");
> +MODULE_LICENSE("GPL");
> --
> 1.8.0
>
>
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