| Message ID | 20190123165533.29645-4-k.konieczny@partner.samsung.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | [v2,1/3] arm64: dts: exynos: add SlimSSS for Exynos5433 | expand |
On Wed, 23 Jan 2019 at 17:55, Kamil Konieczny <k.konieczny@partner.samsung.com> wrote: > > Add AES crypto HW acceleration for Exynos5433, with the help of SlimSSS IP. > > Signed-off-by: Kamil Konieczny <k.konieczny@partner.samsung.com> > --- > drivers/crypto/s5p-sss.c | 50 ++++++++++++++++++++++++++++++++++++---- > 1 file changed, 46 insertions(+), 4 deletions(-) > Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Best regards, Krzysztof
On Wed, Jan 23, 2019 at 05:55:33PM +0100, Kamil Konieczny wrote: > Add AES crypto HW acceleration for Exynos5433, with the help of SlimSSS IP. > > Signed-off-by: Kamil Konieczny <k.konieczny@partner.samsung.com> > --- > drivers/crypto/s5p-sss.c | 50 ++++++++++++++++++++++++++++++++++++---- > 1 file changed, 46 insertions(+), 4 deletions(-) > > diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c > index 0064be0e3941..e2d247f59254 100644 > --- a/drivers/crypto/s5p-sss.c > +++ b/drivers/crypto/s5p-sss.c > @@ -232,6 +232,7 @@ > * struct samsung_aes_variant - platform specific SSS driver data > * @aes_offset: AES register offset from SSS module's base. > * @hash_offset: HASH register offset from SSS module's base. > + * @clk_names: names of clocks needed to run SSS IP > * > * Specifies platform specific configuration of SSS module. > * Note: A structure for driver specific platform data is used for future > @@ -240,6 +241,7 @@ > struct samsung_aes_variant { > unsigned int aes_offset; > unsigned int hash_offset; > + char *clk_names[]; Hello this could be set as const Regards
On 24.01.2019 14:37, Corentin Labbe wrote: > On Wed, Jan 23, 2019 at 05:55:33PM +0100, Kamil Konieczny wrote: >> Add AES crypto HW acceleration for Exynos5433, with the help of SlimSSS IP. >> >> Signed-off-by: Kamil Konieczny <k.konieczny@partner.samsung.com> >> --- >> drivers/crypto/s5p-sss.c | 50 ++++++++++++++++++++++++++++++++++++---- >> 1 file changed, 46 insertions(+), 4 deletions(-) >> >> diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c >> index 0064be0e3941..e2d247f59254 100644 >> [...] >> @@ -240,6 +241,7 @@ >> struct samsung_aes_variant { >> unsigned int aes_offset; >> unsigned int hash_offset; >> + char *clk_names[]; > > Hello > > this could be set as const Definitions sets const: grep "static const" drivers/crypto/s5p-sss.c static const struct samsung_aes_variant s5p_aes_data = { static const struct samsung_aes_variant exynos_aes_data = { static const struct samsung_aes_variant exynos5433_slim_aes_data = { so it is not needed at struct declaration, or am I missing something ?
On Thu, 24 Jan 2019 at 15:34, Kamil Konieczny <k.konieczny@partner.samsung.com> wrote: > > > > On 24.01.2019 14:37, Corentin Labbe wrote: > > On Wed, Jan 23, 2019 at 05:55:33PM +0100, Kamil Konieczny wrote: > >> Add AES crypto HW acceleration for Exynos5433, with the help of SlimSSS IP. > >> > >> Signed-off-by: Kamil Konieczny <k.konieczny@partner.samsung.com> > >> --- > >> drivers/crypto/s5p-sss.c | 50 ++++++++++++++++++++++++++++++++++++---- > >> 1 file changed, 46 insertions(+), 4 deletions(-) > >> > >> diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c > >> index 0064be0e3941..e2d247f59254 100644 > >> [...] > >> @@ -240,6 +241,7 @@ > >> struct samsung_aes_variant { > >> unsigned int aes_offset; > >> unsigned int hash_offset; > >> + char *clk_names[]; > > > > Hello > > > > this could be set as const > > Definitions sets const: > > grep "static const" drivers/crypto/s5p-sss.c > > static const struct samsung_aes_variant s5p_aes_data = { > static const struct samsung_aes_variant exynos_aes_data = { > static const struct samsung_aes_variant exynos5433_slim_aes_data = { > > so it is not needed at struct declaration, or am I missing something ? The struct contains the pointer, so the pointer will be const. However the pointer can point to either const string or non-const string. That's the Corentin's comment about. So in fact as he says - this should be a pointer to a const string. Best regards, Krzysztof
On 24.01.2019 15:39, Krzysztof Kozlowski wrote: > On Thu, 24 Jan 2019 at 15:34, Kamil Konieczny > <k.konieczny@partner.samsung.com> wrote: >> >> >> >> On 24.01.2019 14:37, Corentin Labbe wrote: >>> On Wed, Jan 23, 2019 at 05:55:33PM +0100, Kamil Konieczny wrote: >>>> Add AES crypto HW acceleration for Exynos5433, with the help of SlimSSS IP. >>>> >>>> Signed-off-by: Kamil Konieczny <k.konieczny@partner.samsung.com> >>>> --- >>>> drivers/crypto/s5p-sss.c | 50 ++++++++++++++++++++++++++++++++++++---- >>>> 1 file changed, 46 insertions(+), 4 deletions(-) >>>> >>>> diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c >>>> index 0064be0e3941..e2d247f59254 100644 >>>> [...] >>>> @@ -240,6 +241,7 @@ >>>> struct samsung_aes_variant { >>>> unsigned int aes_offset; >>>> unsigned int hash_offset; >>>> + char *clk_names[]; >>> >>> Hello >>> >>> this could be set as const >> >> Definitions sets const: >> >> grep "static const" drivers/crypto/s5p-sss.c >> >> static const struct samsung_aes_variant s5p_aes_data = { >> static const struct samsung_aes_variant exynos_aes_data = { >> static const struct samsung_aes_variant exynos5433_slim_aes_data = { >> >> so it is not needed at struct declaration, or am I missing something ? > > The struct contains the pointer, so the pointer will be const. However > the pointer can point to either const string or non-const string. > That's the Corentin's comment about. So in fact as he says - this > should be a pointer to a const string. Thank you for clarifing this, I will send v3 soon.
diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c index 0064be0e3941..e2d247f59254 100644 --- a/drivers/crypto/s5p-sss.c +++ b/drivers/crypto/s5p-sss.c @@ -232,6 +232,7 @@ * struct samsung_aes_variant - platform specific SSS driver data * @aes_offset: AES register offset from SSS module's base. * @hash_offset: HASH register offset from SSS module's base. + * @clk_names: names of clocks needed to run SSS IP * * Specifies platform specific configuration of SSS module. * Note: A structure for driver specific platform data is used for future @@ -240,6 +241,7 @@ struct samsung_aes_variant { unsigned int aes_offset; unsigned int hash_offset; + char *clk_names[]; }; struct s5p_aes_reqctx { @@ -296,6 +298,7 @@ struct s5p_aes_ctx { struct s5p_aes_dev { struct device *dev; struct clk *clk; + struct clk *pclk; void __iomem *ioaddr; void __iomem *aes_ioaddr; int irq_fc; @@ -384,11 +387,19 @@ struct s5p_hash_ctx { static const struct samsung_aes_variant s5p_aes_data = { .aes_offset = 0x4000, .hash_offset = 0x6000, + .clk_names = { "secss", }, }; static const struct samsung_aes_variant exynos_aes_data = { .aes_offset = 0x200, .hash_offset = 0x400, + .clk_names = { "secss", }, +}; + +static const struct samsung_aes_variant exynos5433_slim_aes_data = { + .aes_offset = 0x400, + .hash_offset = 0x800, + .clk_names = { "pclk", "aclk", }, }; static const struct of_device_id s5p_sss_dt_match[] = { @@ -400,6 +411,10 @@ static const struct of_device_id s5p_sss_dt_match[] = { .compatible = "samsung,exynos4210-secss", .data = &exynos_aes_data, }, + { + .compatible = "samsung,exynos5433-slim-sss", + .data = &exynos5433_slim_aes_data, + }, { }, }; MODULE_DEVICE_TABLE(of, s5p_sss_dt_match); @@ -2208,18 +2223,39 @@ static int s5p_aes_probe(struct platform_device *pdev) return PTR_ERR(pdata->ioaddr); } - pdata->clk = devm_clk_get(dev, "secss"); + pdata->clk = devm_clk_get(dev, variant->clk_names[0]); if (IS_ERR(pdata->clk)) { - dev_err(dev, "failed to find secss clock source\n"); + dev_err(dev, "failed to find secss clock %s\n", + variant->clk_names[0]); return -ENOENT; } err = clk_prepare_enable(pdata->clk); if (err < 0) { - dev_err(dev, "Enabling SSS clk failed, err %d\n", err); + dev_err(dev, "Enabling clock %s failed, err %d\n", + variant->clk_names[0], err); return err; } + if (variant->clk_names[1]) { + pdata->pclk = devm_clk_get(dev, variant->clk_names[1]); + if (IS_ERR(pdata->pclk)) { + dev_err(dev, "failed to find clock %s\n", + variant->clk_names[1]); + err = -ENOENT; + goto err_clk; + } + + err = clk_prepare_enable(pdata->pclk); + if (err < 0) { + dev_err(dev, "Enabling clock %s failed, err %d\n", + variant->clk_names[0], err); + goto err_clk; + } + } else { + pdata->pclk = NULL; + } + spin_lock_init(&pdata->lock); spin_lock_init(&pdata->hash_lock); @@ -2295,8 +2331,11 @@ static int s5p_aes_probe(struct platform_device *pdev) tasklet_kill(&pdata->tasklet); err_irq: - clk_disable_unprepare(pdata->clk); + if (pdata->pclk) + clk_disable_unprepare(pdata->pclk); +err_clk: + clk_disable_unprepare(pdata->clk); s5p_dev = NULL; return err; @@ -2323,6 +2362,9 @@ static int s5p_aes_remove(struct platform_device *pdev) pdata->use_hash = false; } + if (pdata->pclk) + clk_disable_unprepare(pdata->pclk); + clk_disable_unprepare(pdata->clk); s5p_dev = NULL;
Add AES crypto HW acceleration for Exynos5433, with the help of SlimSSS IP. Signed-off-by: Kamil Konieczny <k.konieczny@partner.samsung.com> --- drivers/crypto/s5p-sss.c | 50 ++++++++++++++++++++++++++++++++++++---- 1 file changed, 46 insertions(+), 4 deletions(-)