Slight change of plan for v2.
Now we're doing a seperate clk_prepare(), as the clk_enable() in the
previous patch turned out to be called inside a spin_lock().
Arnd, can you confirm your Ack please?
---
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: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Andreas Westin <andreas.westin@xxxxxxxxxxxxxx>
Cc: linux-crypto@xxxxxxxxxxxxxxx
Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
diff --git a/drivers/crypto/ux500/hash/hash_core.c b/drivers/crypto/ux500/hash/hash_core.c
index 632c333..1e8b2f3 100644
--- a/drivers/crypto/ux500/hash/hash_core.c
+++ b/drivers/crypto/ux500/hash/hash_core.c
@@ -1727,11 +1727,17 @@ 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);
@@ -1763,6 +1769,9 @@ 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);
@@ -1827,6 +1836,7 @@ 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);
--
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