Hi James,
On Wed, Mar 11, 2015 at 7:06 PM, James Hartley <james.hartley@xxxxxxxxxx> wrote:
> This adds support for the Imagination Technologies hash accelerator which
> provides hardware acceleration for SHA1 SHA224 SHA256 and MD5 hashes.
>
> Signed-off-by: James Hartley <james.hartley@xxxxxxxxxx>
One comment below, otherwise this looks fine to me.
> --- /dev/null
> +++ b/drivers/crypto/img-hash.c
> +static int img_hash_hw_init(struct img_hash_dev *hdev)
> +{
> + unsigned long long nbits;
> + u32 u, l;
> + int ret;
> +
> + ret = clk_prepare_enable(hdev->hash_clk);
> + if (ret)
> + return ret;
> +
> + ret = clk_prepare_enable(hdev->sys_clk);
> + if (ret) {
> + clk_disable_unprepare(hdev->hash_clk);
> + return ret;
> + }
I think you'll still end up with inflated prepare/enable counts for
these clocks since this function may get called multiple times and the
only clk_disable_unprepare() calls are in the remove() path. Perhaps
it's best to just enable the clocks in probe() until runtime PM
support is added?
Thanks,
Andrew
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