diff options
| author | Simon Baatz <gmbnomis@gmail.com> | 2017-03-27 20:02:08 +0200 |
|---|---|---|
| committer | Boris Brezillon <boris.brezillon@free-electrons.com> | 2017-03-29 17:05:37 +0200 |
| commit | ef980cf8b05bc862f4533fcdeae2911e6ff7027a (patch) | |
| tree | ca2930d38a4da7fcccd35f513ceb5011996a8919 | |
| parent | 675b11d94ce9baa5eb365a51b35d2793f77c8ab8 (diff) | |
mtd: nand: orion: improve handling of optional clock
The clock gate used by orion_nand is not available on all platforms.
When getting this optional clock gate, the code masked all errors.
Let's be more precise here and actually only allow ENOENT.
EPROBE_DEFER is handled like any other error code since probe deferral
is not supported by drivers using module_platform_driver_probe().
Signed-off-by: Simon Baatz <gmbnomis@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
| -rw-r--r-- | drivers/mtd/nand/orion_nand.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/drivers/mtd/nand/orion_nand.c b/drivers/mtd/nand/orion_nand.c index 3acdc20485f1..f8e463a97b9e 100644 --- a/drivers/mtd/nand/orion_nand.c +++ b/drivers/mtd/nand/orion_nand.c @@ -156,8 +156,17 @@ static int __init orion_nand_probe(struct platform_device *pdev) /* Not all platforms can gate the clock, so it is not an error if the clock does not exists. */ info->clk = devm_clk_get(&pdev->dev, NULL); - if (!IS_ERR(info->clk)) - clk_prepare_enable(info->clk); + if (IS_ERR(info->clk)) { + ret = PTR_ERR(info->clk); + if (ret == -ENOENT) { + info->clk = NULL; + } else { + dev_err(&pdev->dev, "failed to get clock!\n"); + return ret; + } + } + + clk_prepare_enable(info->clk); ret = nand_scan(mtd, 1); if (ret) @@ -173,9 +182,7 @@ static int __init orion_nand_probe(struct platform_device *pdev) return 0; no_dev: - if (!IS_ERR(info->clk)) - clk_disable_unprepare(info->clk); - + clk_disable_unprepare(info->clk); return ret; } @@ -187,8 +194,7 @@ static int orion_nand_remove(struct platform_device *pdev) nand_release(mtd); - if (!IS_ERR(info->clk)) - clk_disable_unprepare(info->clk); + clk_disable_unprepare(info->clk); return 0; } |