Hi,
Le mer. 11 sept. 2019 à 13:46, Corentin Labbe
<clabbe.montjoie@xxxxxxxxx> a écrit :
>
> This patch enables power management on the Security System.
>
> Signed-off-by: Corentin Labbe <clabbe.montjoie@xxxxxxxxx>
> ---
> drivers/crypto/sunxi-ss/sun4i-ss-cipher.c | 5 +++
> drivers/crypto/sunxi-ss/sun4i-ss-core.c | 42 ++++++++++++++++++++++-
> 2 files changed, 46 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c b/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c
> index fa4b1b47822e..1fedec9e83b0 100644
> --- a/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c
> +++ b/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c
> @@ -10,6 +10,8 @@
> *
> * You could find the datasheet in Documentation/arm/sunxi.rst
> */
> +
> +#include <linux/pm_runtime.h>
> #include "sun4i-ss.h"
>
> static int noinline_for_stack sun4i_ss_opti_poll(struct skcipher_request *areq)
> @@ -497,13 +499,16 @@ int sun4i_ss_cipher_init(struct crypto_tfm *tfm)
> return PTR_ERR(op->fallback_tfm);
> }
>
> + pm_runtime_get_sync(op->ss->dev);
> return 0;
> }
>
> void sun4i_ss_cipher_exit(struct crypto_tfm *tfm)
> {
> struct sun4i_tfm_ctx *op = crypto_tfm_ctx(tfm);
> +
> crypto_free_sync_skcipher(op->fallback_tfm);
> + pm_runtime_put_sync(op->ss->dev);
> }
>
> /* check and set the AES key, prepare the mode to be used */
> diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-core.c b/drivers/crypto/sunxi-ss/sun4i-ss-core.c
> index 2c9ff01dddfc..5e6e1a308f60 100644
> --- a/drivers/crypto/sunxi-ss/sun4i-ss-core.c
> +++ b/drivers/crypto/sunxi-ss/sun4i-ss-core.c
> @@ -14,6 +14,7 @@
> #include <linux/module.h>
> #include <linux/of.h>
> #include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> #include <crypto/scatterwalk.h>
> #include <linux/scatterlist.h>
> #include <linux/interrupt.h>
> @@ -258,6 +259,37 @@ static int sun4i_ss_enable(struct sun4i_ss_ctx *ss)
> return err;
> }
>
> +#ifdef CONFIG_PM
> +static int sun4i_ss_pm_suspend(struct device *dev)
> +{
> + struct sun4i_ss_ctx *ss = dev_get_drvdata(dev);
> +
> + sun4i_ss_disable(ss);
> + return 0;
> +}
> +
> +static int sun4i_ss_pm_resume(struct device *dev)
> +{
> + struct sun4i_ss_ctx *ss = dev_get_drvdata(dev);
> +
> + return sun4i_ss_enable(ss);
> +}
> +#endif
> +
> +const struct dev_pm_ops sun4i_ss_pm_ops = {
> + SET_RUNTIME_PM_OPS(sun4i_ss_pm_suspend, sun4i_ss_pm_resume, NULL)
> +};
> +
> +static void sun4i_ss_pm_init(struct sun4i_ss_ctx *ss)
> +{
> + pm_runtime_use_autosuspend(ss->dev);
> + pm_runtime_set_autosuspend_delay(ss->dev, 1000);
> +
> + pm_runtime_get_noresume(ss->dev);
> + pm_runtime_set_active(ss->dev);
> + pm_runtime_enable(ss->dev);
> +}
It's not really clear to me what you're doing here? Can you explain?
The rest looks fine.
Maxime
