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

Sameer Pujar
2020-01-24T03:39:21Z

On 1/24/2020 6:48 AM, Dmitry Osipenko wrote:
> External email: Use caution opening links or attachments
>
>
> 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?

Isn't it the same with empty braces?
>
> [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);

will update
>> + 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);

will update