2013-05-02 10:50:05

by Lee Jones

Subject: [PATCH 1/8] 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 <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Andreas Westin <[email protected]>
Cc: Ulf Hansson <[email protected]>
Cc: [email protected]
Acked-by: Arnd Bergmann <[email protected]>
Signed-off-by: Lee Jones <[email protected]>
---
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 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);

--
1.7.10.4

2013-05-08 13:57:27

by Ulf Hansson

Subject: Re: [PATCH 1/8] crypto: ux500/hash - Prepare clock before enabling it

On 2 May 2013 12:49, Lee Jones <[email protected]> wrote:
> 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 <[email protected]>
> Cc: David S. Miller <[email protected]>
> Cc: Andreas Westin <[email protected]>
> Cc: Ulf Hansson <[email protected]>
> Cc: [email protected]
> Acked-by: Arnd Bergmann <[email protected]>
> Signed-off-by: Lee Jones <[email protected]>
> ---
> 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 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);
>
> --
> 1.7.10.4
>

Acked-by: Ulf Hansson <[email protected]>