Hi Brian,
On Wed, Oct 24, 2018 at 09:29:36PM -0400, Brian Masney wrote:
> This patch adds a new vibrator driver that supports various Qualcomm
> MSM SOCs. Driver was tested on a LG Nexus 5 (hammerhead) phone.
>
...
> +
> +#define msm_vibrator_write(msm_vibrator, offset, value) \
> + writel((value), (void __iomem *)((msm_vibrator)->base + (offset)))
Make in a function? It will be inlined anyways...
> +
> + vibrator->vcc = devm_regulator_get(&pdev->dev, "vcc");
> + if (IS_ERR(vibrator->vcc)) {
> + if (PTR_ERR(vibrator->vcc) != -EPROBE_DEFER)
> + dev_err(&pdev->dev, "Failed to get regulator: %ld\n",
> + PTR_ERR(vibrator->vcc));
> + return PTR_ERR(vibrator->vcc);
> + }
> +
> + vibrator->enable_gpio = devm_gpiod_get(&pdev->dev, "enable",
> + GPIOD_OUT_LOW);
> + if (IS_ERR(vibrator->enable_gpio)) {
You have explicit deferral handling for the regulator, but not gpio. I'd
prefer if we did (or not) it consistently.
> + dev_err(&pdev->dev, "Failed to get enable gpio: %ld\n",
> + PTR_ERR(vibrator->enable_gpio));
> + return PTR_ERR(vibrator->enable_gpio);
> + }
> +
> + vibrator->clk = devm_clk_get(&pdev->dev, "pwm");
> + if (IS_ERR(vibrator->clk)) {
Same here.
> + dev_err(&pdev->dev, "Failed to lookup pwm clock: %ld\n",
> + PTR_ERR(vibrator->clk));
> + return PTR_ERR(vibrator->clk);
> + }
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!res) {
> + dev_err(&pdev->dev, "Failed to get platform resource\n");
> + return -ENODEV;
> + }
> +
> + vibrator->base = devm_ioremap(&pdev->dev, res->start,
> + resource_size(res));
> + if (IS_ERR(vibrator->base)) {
devm_ioremap() returns NULL on error. You either need to check for NULL
or see of you can use devm_ioremap_resource().
> + dev_err(&pdev->dev, "Failed to iomap resource: %ld\n",
> + PTR_ERR(vibrator->base));
> + return PTR_ERR(vibrator->base);
> + }
> +
> + vibrator->enabled = false;
> + mutex_init(&vibrator->mutex);
> + INIT_WORK(&vibrator->worker, msm_vibrator_worker);
> +
> + vibrator->input->name = "msm-vibrator";
> + vibrator->input->id.bustype = BUS_HOST;
> + vibrator->input->dev.parent = &pdev->dev;
You allocated input device with devm so there is no need to set parent
by hand.
> + vibrator->input->close = msm_vibrator_close;
> +
> + input_set_drvdata(vibrator->input, vibrator);
> + input_set_capability(vibrator->input, EV_FF, FF_RUMBLE);
> +
> + ret = input_ff_create_memless(vibrator->input, NULL,
> + msm_vibrator_play_effect);
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to create ff memless: %d", ret);
> + return ret;
> + }
> +
> + ret = input_register_device(vibrator->input);
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to register input device: %d", ret);
> + return ret;
> + }
> +
> + platform_set_drvdata(pdev, vibrator);
> +
> + return 0;
> +}
> +
> +static int __maybe_unused msm_vibrator_suspend(struct device *dev)
> +{
> + struct msm_vibrator *vibrator = dev_get_drvdata(dev);
Prefer explicit platform_get_drvdata() since we are working with
platform device (even though it resolves to the same thing).
> +
> + cancel_work_sync(&vibrator->worker);
> +
> + if (vibrator->enabled)
> + msm_vibrator_stop(vibrator);
> +
> + return 0;
> +}
> +
> +static int __maybe_unused msm_vibrator_resume(struct device *dev)
> +{
> + struct msm_vibrator *vibrator = dev_get_drvdata(dev);
Same here.
Thanks.
--
Dmitry
