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| author | Gilad Ben-Yossef <gilad@benyossef.com> | 2018-05-24 15:19:07 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-05-31 00:13:49 +0800 |
| commit | 35f859fc936cade5bd60cf8ece27d48503084011 (patch) | |
| tree | 8474de14d2a691b98598dcffb8bdc8f02944f17b /drivers/crypto | |
| parent | 281a58c8326ca62ca6341f9d2cc2eb08044670e8 (diff) | |
| download | linux-35f859fc936cade5bd60cf8ece27d48503084011.tar.gz linux-35f859fc936cade5bd60cf8ece27d48503084011.tar.bz2 linux-35f859fc936cade5bd60cf8ece27d48503084011.zip | |
crypto: ccree - better clock handling
Use managed clock handling, differentiate between no clock (possibly OK)
and clock init failure (never OK) and correctly handle clock detection
being deferred.
Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/ccree/cc_driver.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/crypto/ccree/cc_driver.c b/drivers/crypto/ccree/cc_driver.c index 444fc5542598..892d4120a120 100644 --- a/drivers/crypto/ccree/cc_driver.c +++ b/drivers/crypto/ccree/cc_driver.c @@ -190,6 +190,7 @@ static int init_cc_resources(struct platform_device *plat_dev) u64 dma_mask; const struct cc_hw_data *hw_rev; const struct of_device_id *dev_id; + struct clk *clk; int rc = 0; new_drvdata = devm_kzalloc(dev, sizeof(*new_drvdata), GFP_KERNEL); @@ -219,7 +220,24 @@ static int init_cc_resources(struct platform_device *plat_dev) platform_set_drvdata(plat_dev, new_drvdata); new_drvdata->plat_dev = plat_dev; - new_drvdata->clk = of_clk_get(np, 0); + clk = devm_clk_get(dev, NULL); + if (IS_ERR(clk)) + switch (PTR_ERR(clk)) { + /* Clock is optional so this might be fine */ + case -ENOENT: + break; + + /* Clock not available, let's try again soon */ + case -EPROBE_DEFER: + return -EPROBE_DEFER; + + default: + dev_err(dev, "Error getting clock: %ld\n", + PTR_ERR(clk)); + return PTR_ERR(clk); + } + new_drvdata->clk = clk; + new_drvdata->coherent = of_dma_is_coherent(np); /* Get device resources */ |