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Subject[PATCH 12/39] crypto: ux500/hash - Prepare clock before enabling it
Date
If we fail to prepare the ux500-hash clock before enabling it the
platform will fail to boot. Here we insure this happens.

Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: David S. Miller <davem@davemloft.net>
Cc: Andreas Westin <andreas.westin@stericsson.com>
Cc: linux-crypto@vger.kernel.org
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
drivers/crypto/ux500/hash/hash_core.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/ux500/hash/hash_core.c b/drivers/crypto/ux500/hash/hash_core.c
index cf55089..4b02428 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);

--
1.7.10.4


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