diff options
| author | Trevor Gamblin <tgamblin@baylibre.com> | 2024-06-17 17:18:19 +0200 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2024-06-25 22:04:48 +0200 |
| commit | d9b329a9712280968fb4ba6dac09fabde24bf566 (patch) | |
| tree | d789eb4e5e797f55c23afd6606bf70d6a1e488f8 /drivers | |
| parent | iio: trigger: stm32-timer-trigger: make use of regmap_clear_bits(), regmap_se... (diff) | |
| download | linux-d9b329a9712280968fb4ba6dac09fabde24bf566.tar.xz linux-d9b329a9712280968fb4ba6dac09fabde24bf566.zip | |
iio: dac: adi-axi-dac: improve probe() error messaging
The current error handling for calls such as devm_clk_get_enabled() in
the adi-axi-dac probe() function means that, if a property such as
'clocks' (for example) is not present in the devicetree when booting a
kernel with the driver enabled, the resulting error message will be
vague, e.g.:
|adi_axi_dac 44a00000.dac: probe with driver adi_axi_dac failed with error -2
Change the devm_clk_get_enabled(), devm_regmap_init_mmio(), and
devm_iio_backend_register() checks to use dev_err_probe() with some
context for easier debugging.
After the change:
|adi_axi_dac 44a00000.dac: error -ENOENT: failed to get clock
|adi_axi_dac 44a00000.dac: probe with driver adi_axi_dac failed with error -2
Suggested-by: Nuno Sa <nuno.sa@analog.com>
Tested-by: Angelo Dureghello <adureghello@baylibre.com>
Signed-off-by: Trevor Gamblin <tgamblin@baylibre.com>
Link: https://patch.msgid.link/20240617151820.3337034-1-tgamblin@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iio/dac/adi-axi-dac.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/iio/dac/adi-axi-dac.c b/drivers/iio/dac/adi-axi-dac.c index 880d83a014a1..6d56428e623d 100644 --- a/drivers/iio/dac/adi-axi-dac.c +++ b/drivers/iio/dac/adi-axi-dac.c @@ -545,7 +545,8 @@ static int axi_dac_probe(struct platform_device *pdev) clk = devm_clk_get_enabled(&pdev->dev, NULL); if (IS_ERR(clk)) - return PTR_ERR(clk); + return dev_err_probe(&pdev->dev, PTR_ERR(clk), + "failed to get clock\n"); base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(base)) @@ -555,7 +556,8 @@ static int axi_dac_probe(struct platform_device *pdev) st->regmap = devm_regmap_init_mmio(&pdev->dev, base, &axi_dac_regmap_config); if (IS_ERR(st->regmap)) - return PTR_ERR(st->regmap); + return dev_err_probe(&pdev->dev, PTR_ERR(st->regmap), + "failed to init register map\n"); /* * Force disable the core. Up to the frontend to enable us. And we can @@ -601,7 +603,8 @@ static int axi_dac_probe(struct platform_device *pdev) mutex_init(&st->lock); ret = devm_iio_backend_register(&pdev->dev, &axi_dac_generic, st); if (ret) - return ret; + return dev_err_probe(&pdev->dev, ret, + "failed to register iio backend\n"); dev_info(&pdev->dev, "AXI DAC IP core (%d.%.2d.%c) probed\n", ADI_AXI_PCORE_VER_MAJOR(ver), |