Re: [alsa-devel] [PATCH 5/9] ASoC: tegra: add Tegra210 based AHUB driver

Dmitry Osipenko
2020-01-24T01:18:45Z

20.01.2020 17:23, Sameer Pujar пишет:
[snip]
> +static int tegra_ahub_get_value_enum(struct snd_kcontrol *kctl,
> + struct snd_ctl_elem_value *uctl)
> +{
> + struct snd_soc_component *cmpnt = snd_soc_dapm_kcontrol_component(kctl);
> + struct tegra_ahub *ahub = snd_soc_component_get_drvdata(cmpnt);
> + struct soc_enum *e = (struct soc_enum *)kctl->private_value;
> + unsigned int reg, i, bit_pos = 0;
> +
> + /*
> + * Find the bit position of current MUX input.
> + * If nothing is set, position would be 0 and it corresponds to 'None'.
> + */
> + for (i = 0; i < ahub->soc_data->reg_count; i++) {
> + unsigned int reg_val;
> +
> + reg = e->reg + (TEGRA210_XBAR_PART1_RX * i);
> + snd_soc_component_read(cmpnt, reg, &reg_val);
> + reg_val &= ahub->soc_data->mask[i];
> +
> + if (reg_val) {
> + bit_pos = ffs(reg_val) +
> + (8 * cmpnt->val_bytes * i);

Multiplication takes precedence, braces are not needed. Same for all
other occurrences in the code.

[snip]
> + break;
> + }
> + }
> +
> + /* Find index related to the item in array *_ahub_mux_texts[] */
> + for (i = 0; i < e->items; i++) {
> + if (bit_pos == e->values[i]) {
> + uctl->value.enumerated.item[0] = i;
> + break;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static int tegra_ahub_put_value_enum(struct snd_kcontrol *kctl,
> + struct snd_ctl_elem_value *uctl)
> +{
> + struct snd_soc_component *cmpnt = snd_soc_dapm_kcontrol_component(kctl);
> + struct tegra_ahub *ahub = snd_soc_component_get_drvdata(cmpnt);
> + struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kctl);
> + struct soc_enum *e = (struct soc_enum *)kctl->private_value;
> + struct snd_soc_dapm_update update[TEGRA_XBAR_UPDATE_MAX_REG] = { };

Shouldn't this be {0} to make array zero'ed?

[snip]
> +static int tegra_ahub_probe(struct platform_device *pdev)
> +{
> + const struct of_device_id *match;
> + struct tegra_ahub *ahub;
> + struct tegra_ahub_soc_data *soc_data;
> + void __iomem *regs;
> + struct resource *res;
> + int ret;
> +
> + match = of_match_device(tegra_ahub_of_match, &pdev->dev);
> + if (!match) {
> + dev_err(&pdev->dev, "error: no device match found\n");
> + return -ENODEV;
> + }
> +
> + soc_data = (struct tegra_ahub_soc_data *)match->data;

soc_data = device_get_match_data(&pdev->dev);

> + ahub = devm_kcalloc(&pdev->dev, 1, sizeof(*ahub), GFP_KERNEL);
> + if (!ahub)
> + return -ENOMEM;
> +
> + ahub->soc_data = soc_data;
> +
> + platform_set_drvdata(pdev, ahub);
> +
> + ahub->clk = devm_clk_get(&pdev->dev, "ahub");
> + if (IS_ERR(ahub->clk)) {
> + dev_err(&pdev->dev, "can't retrieve AHUB clock\n");
> + return PTR_ERR(ahub->clk);
> + }
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +
> + regs = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(regs))
> + return PTR_ERR(regs);

regs = devm_platform_ioremap_resource(pdev, 0);