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

[Sameer Pujar <spujar@xxxxxxxxxx>]

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