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drm/tegra: dpaux: Provide error message in probe

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When probing the dpaux device fails, output proper error messages to
help diagnose the cause of the failure.

Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2015-04-27 14:50:30 +02:00
parent ddfb406b2f
commit 08f580ef2f
1 changed files with 24 additions and 6 deletions
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30
drivers/gpu/drm/tegra/dpaux.c
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@ -294,26 +294,41 @@ static int tegra_dpaux_probe(struct platform_device *pdev)
} }
dpaux->rst = devm_reset_control_get(&pdev->dev, "dpaux"); dpaux->rst = devm_reset_control_get(&pdev->dev, "dpaux");
if (IS_ERR(dpaux->rst)) if (IS_ERR(dpaux->rst)) {
dev_err(&pdev->dev, "failed to get reset control: %ld\n",
PTR_ERR(dpaux->rst));
return PTR_ERR(dpaux->rst); return PTR_ERR(dpaux->rst);
}
dpaux->clk = devm_clk_get(&pdev->dev, NULL); dpaux->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(dpaux->clk)) if (IS_ERR(dpaux->clk)) {
dev_err(&pdev->dev, "failed to get module clock: %ld\n",
PTR_ERR(dpaux->clk));
return PTR_ERR(dpaux->clk); return PTR_ERR(dpaux->clk);
}
err = clk_prepare_enable(dpaux->clk); err = clk_prepare_enable(dpaux->clk);
if (err < 0) if (err < 0) {
dev_err(&pdev->dev, "failed to enable module clock: %d\n",
err);
return err; return err;
}
reset_control_deassert(dpaux->rst); reset_control_deassert(dpaux->rst);
dpaux->clk_parent = devm_clk_get(&pdev->dev, "parent"); dpaux->clk_parent = devm_clk_get(&pdev->dev, "parent");
if (IS_ERR(dpaux->clk_parent)) if (IS_ERR(dpaux->clk_parent)) {
dev_err(&pdev->dev, "failed to get parent clock: %ld\n",
PTR_ERR(dpaux->clk_parent));
return PTR_ERR(dpaux->clk_parent); return PTR_ERR(dpaux->clk_parent);
}
err = clk_prepare_enable(dpaux->clk_parent); err = clk_prepare_enable(dpaux->clk_parent);
if (err < 0) if (err < 0) {
dev_err(&pdev->dev, "failed to enable parent clock: %d\n",
err);
return err; return err;
}
err = clk_set_rate(dpaux->clk_parent, 270000000); err = clk_set_rate(dpaux->clk_parent, 270000000);
if (err < 0) { if (err < 0) {
@ -323,8 +338,11 @@ static int tegra_dpaux_probe(struct platform_device *pdev)
} }
dpaux->vdd = devm_regulator_get(&pdev->dev, "vdd"); dpaux->vdd = devm_regulator_get(&pdev->dev, "vdd");
if (IS_ERR(dpaux->vdd)) if (IS_ERR(dpaux->vdd)) {
dev_err(&pdev->dev, "failed to get VDD supply: %ld\n",
PTR_ERR(dpaux->vdd));
return PTR_ERR(dpaux->vdd); return PTR_ERR(dpaux->vdd);
}
err = devm_request_irq(dpaux->dev, dpaux->irq, tegra_dpaux_irq, 0, err = devm_request_irq(dpaux->dev, dpaux->irq, tegra_dpaux_irq, 0,
dev_name(dpaux->dev), dpaux); dev_name(dpaux->dev), dpaux);