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authorLee Jones <lee.jones@linaro.org>2013-05-15 10:51:35 +0100
committerLinus Walleij <linus.walleij@linaro.org>2013-05-23 21:14:02 +0200
commit58ba67dd36aa393132108ffcaa83873a1f82d70a (patch)
treed25bc0ee369353516dea8a72f6f4cf464928f77c /drivers/crypto/ux500
parent50511449dd89099067fd9727c96449b5bc048da6 (diff)
crypto: ux500/hash - Prepare clock before enabling it
If we fail to prepare the ux500-hash clock before enabling it the platform will fail to boot. Here we insure this happens. Cc: David S. Miller <davem@davemloft.net> Cc: Andreas Westin <andreas.westin@stericsson.com> Cc: linux-crypto@vger.kernel.org Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/crypto/ux500')
-rw-r--r--drivers/crypto/ux500/hash/hash_core.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/crypto/ux500/hash/hash_core.c b/drivers/crypto/ux500/hash/hash_core.c
index cf5508967539..4b024280def1 100644
--- a/drivers/crypto/ux500/hash/hash_core.c
+++ b/drivers/crypto/ux500/hash/hash_core.c
@@ -1726,11 +1726,17 @@ static int ux500_hash_probe(struct platform_device *pdev)
goto out_regulator;
}
+ ret = clk_prepare(device_data->clk);
+ if (ret) {
+ dev_err(dev, "[%s] clk_prepare() failed!", __func__);
+ goto out_clk;
+ }
+
/* Enable device power (and clock) */
ret = hash_enable_power(device_data, false);
if (ret) {
dev_err(dev, "[%s]: hash_enable_power() failed!", __func__);
- goto out_clk;
+ goto out_clk_unprepare;
}
ret = hash_check_hw(device_data);
@@ -1762,6 +1768,9 @@ static int ux500_hash_probe(struct platform_device *pdev)
out_power:
hash_disable_power(device_data, false);
+out_clk_unprepare:
+ clk_unprepare(device_data->clk);
+
out_clk:
clk_put(device_data->clk);
@@ -1826,6 +1835,7 @@ static int ux500_hash_remove(struct platform_device *pdev)
dev_err(dev, "[%s]: hash_disable_power() failed",
__func__);
+ clk_unprepare(device_data->clk);
clk_put(device_data->clk);
regulator_put(device_data->regulator);