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authorThierry Reding <treding@nvidia.com>2015-04-27 15:50:30 +0300
committerThierry Reding <treding@nvidia.com>2015-08-13 14:47:46 +0300
commit08f580ef2fcef724db1107545bc14306b7c9eae2 (patch)
tree21e5e19d24afff016f1772b50fef8c9e096f6010 /drivers/gpu/drm/tegra
parentddfb406b2f9f83e85734e43d043cdd1b2519df13 (diff)
downloadlinux-08f580ef2fcef724db1107545bc14306b7c9eae2.tar.xz
drm/tegra: dpaux: Provide error message in probe
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>
Diffstat (limited to 'drivers/gpu/drm/tegra')
-rw-r--r--drivers/gpu/drm/tegra/dpaux.c30
1 files changed, 24 insertions, 6 deletions
diff --git a/drivers/gpu/drm/tegra/dpaux.c b/drivers/gpu/drm/tegra/dpaux.c
index 07b26972f487..c96c21bd91c1 100644
--- a/drivers/gpu/drm/tegra/dpaux.c
+++ b/drivers/gpu/drm/tegra/dpaux.c
@@ -294,26 +294,41 @@ static int tegra_dpaux_probe(struct platform_device *pdev)
}
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);
+ }
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);
+ }
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;
+ }
reset_control_deassert(dpaux->rst);
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);
+ }
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;
+ }
err = clk_set_rate(dpaux->clk_parent, 270000000);
if (err < 0) {
@@ -323,8 +338,11 @@ static int tegra_dpaux_probe(struct platform_device *pdev)
}
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);
+ }
err = devm_request_irq(dpaux->dev, dpaux->irq, tegra_dpaux_irq, 0,
dev_name(dpaux->dev), dpaux);