linux-kernel - [PATCH v2] ASoC: tegra: probe deferral error reporting

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Date:   Tue, 14 Aug 2018 16:01:44 +0200
From:   Marcel Ziswiler <marcel@...wiler.com>
To:     alsa-devel@...a-project.org, linux-tegra@...r.kernel.org
Cc:     Stefan Agner <stefan@...er.ch>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
        Takashi Iwai <tiwai@...e.com>,
        Liam Girdwood <lgirdwood@...il.com>
Subject: [PATCH v2] ASoC: tegra: probe deferral error reporting

From: Marcel Ziswiler <marcel.ziswiler@...adex.com>

Actually report the error codes from of_get_named_gpio() resp.
devm_gpio_request_one() upon trying to get the codec reset resp. sync
GPIOs unless it is just a probe deferral.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@...adex.com>

---

Changes in v2:
- Silence probe deferral as suggested by Stefan.
- Fix line over 80 characters as reported by checkpatch.

 sound/soc/tegra/tegra20_ac97.c | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/sound/soc/tegra/tegra20_ac97.c b/sound/soc/tegra/tegra20_ac97.c
index 682ef33afb5f..2ac6b2d73980 100644
--- a/sound/soc/tegra/tegra20_ac97.c
+++ b/sound/soc/tegra/tegra20_ac97.c
@@ -351,18 +351,31 @@ static int tegra20_ac97_platform_probe(struct platform_device *pdev)
 		ret = devm_gpio_request_one(&pdev->dev, ac97->reset_gpio,
 					    GPIOF_OUT_INIT_HIGH, "codec-reset");
 		if (ret) {
-			dev_err(&pdev->dev, "could not get codec-reset GPIO\n");
+			if (ret != -EPROBE_DEFER)
+				dev_err(&pdev->dev,
+					"could not get codec-reset GPIO: %d\n",
+					ret);
+
 			goto err_clk_put;
 		}
 	} else {
-		dev_err(&pdev->dev, "no codec-reset GPIO supplied\n");
+		ret = ac97->reset_gpio;
+		if (ret != -EPROBE_DEFER)
+			dev_err(&pdev->dev,
+				"no codec-reset GPIO supplied: %d\n",
+				ret);
+
 		goto err_clk_put;
 	}
 
 	ac97->sync_gpio = of_get_named_gpio(pdev->dev.of_node,
 					    "nvidia,codec-sync-gpio", 0);
 	if (!gpio_is_valid(ac97->sync_gpio)) {
-		dev_err(&pdev->dev, "no codec-sync GPIO supplied\n");
+		ret = ac97->sync_gpio;
+		if (ret != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "no codec-sync GPIO supplied: %d\n",
+				ret);
+
 		goto err_clk_put;
 	}
 
-- 
2.14.4