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Message-ID:
<AM9PR04MB8604A7E92C450BFE20ADF1A595062@AM9PR04MB8604.eurprd04.prod.outlook.com>
Date: Wed, 10 Apr 2024 07:05:42 +0000
From: Pankaj Gupta <pankaj.gupta@....com>
To: Gaurav Jain <gaurav.jain@....com>, Horia Geanta <horia.geanta@....com>,
Varun Sethi <V.Sethi@....com>, 'Herbert Xu' <herbert@...dor.apana.org.au>,
"'David S . Miller'" <davem@...emloft.net>, Iuliana Prodan
<iuliana.prodan@....com>
CC: "'linux-crypto@...r.kernel.org'" <linux-crypto@...r.kernel.org>,
"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>, dl-linux-imx
<linux-imx@....com>
Subject: RE: [PATCH] caam: init-clk based on caam-page0-access
> -----Original Message-----
> From: Gaurav Jain <gaurav.jain@....com>
> Sent: Wednesday, April 10, 2024 12:29 PM
> To: Pankaj Gupta <pankaj.gupta@....com>; Horia Geanta
> <horia.geanta@....com>; Varun Sethi <V.Sethi@....com>; 'Herbert Xu'
> <herbert@...dor.apana.org.au>; 'David S . Miller' <davem@...emloft.net>;
> Iuliana Prodan <iuliana.prodan@....com>
> Cc: 'linux-crypto@...r.kernel.org' <linux-crypto@...r.kernel.org>; 'linux-
> kernel@...r.kernel.org' <linux-kernel@...r.kernel.org>; dl-linux-imx <linux-
> imx@....com>
> Subject: RE: [PATCH] caam: init-clk based on caam-page0-access
>
> Hi Pankaj
>
> Please check the below comments.
>
> Regards
> Gaurav Jain
>
> > -----Original Message-----
> > From: Pankaj Gupta <pankaj.gupta@....com>
> > Sent: Monday, July 10, 2023 11:03 AM
> > To: Horia Geanta <horia.geanta@....com>; Gaurav Jain
> > <gaurav.jain@....com>
> > Cc: Pankaj Gupta <pankaj.gupta@....com>
> > Subject: [PATCH] caam: init-clk based on caam-page0-access
> >
> > CAAM clock initialization to be done based on, soc specific info
> > stored in struct
> > caam_imx_data:
> > - caam-page0-access flag
> > - num_clks
> >
> > Signed-off-by: Pankaj Gupta <pankaj.gupta@....com>
> > ---
> > drivers/crypto/caam/ctrl.c | 26 ++++++++++++++++++++++++--
> > 1 file changed, 24 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
> > index
> > ff9ddbbca377..74d0b7541d54 100644
> > --- a/drivers/crypto/caam/ctrl.c
> > +++ b/drivers/crypto/caam/ctrl.c
> > @@ -511,6 +511,7 @@ static const struct of_device_id caam_match[] = {
> > MODULE_DEVICE_TABLE(of, caam_match);
> >
> > struct caam_imx_data {
> > + bool page0_access;
> > const struct clk_bulk_data *clks;
> > int num_clks;
> > };
> > @@ -523,6 +524,7 @@ static const struct clk_bulk_data caam_imx6_clks[]
> > = { };
> >
> > static const struct caam_imx_data caam_imx6_data = {
> > + .page0_access = true,
> > .clks = caam_imx6_clks,
> > .num_clks = ARRAY_SIZE(caam_imx6_clks), }; @@ -533,6 +535,7 @@
> > static const struct clk_bulk_data caam_imx7_clks[] = { };
> >
> > static const struct caam_imx_data caam_imx7_data = {
> > + .page0_access = true,
> > .clks = caam_imx7_clks,
> > .num_clks = ARRAY_SIZE(caam_imx7_clks), }; @@ -544,6 +547,7 @@
> > static const struct clk_bulk_data caam_imx6ul_clks[] = { };
> >
> > static const struct caam_imx_data caam_imx6ul_data = {
> > + .page0_access = true,
> > .clks = caam_imx6ul_clks,
> > .num_clks = ARRAY_SIZE(caam_imx6ul_clks), }; @@ -553,15 +557,23
> @@
> > static const struct clk_bulk_data caam_vf610_clks[] = { };
> >
> > static const struct caam_imx_data caam_vf610_data = {
> > + .page0_access = true,
> > .clks = caam_vf610_clks,
> > .num_clks = ARRAY_SIZE(caam_vf610_clks), };
> >
> > +static const struct caam_imx_data caam_imx8ulp_data = {
> > + .page0_access = false,
> > + .clks = NULL,
> > + .num_clks = 0,
> > +};
> > +
> > static const struct soc_device_attribute caam_imx_soc_table[] = {
> > { .soc_id = "i.MX6UL", .data = &caam_imx6ul_data },
> > { .soc_id = "i.MX6*", .data = &caam_imx6_data },
> > { .soc_id = "i.MX7*", .data = &caam_imx7_data },
> > { .soc_id = "i.MX8M*", .data = &caam_imx7_data },
> > + { .soc_id = "i.MX8ULP", .data = &caam_imx8ulp_data },
> > { .soc_id = "VF*", .data = &caam_vf610_data },
> > { .family = "Freescale i.MX" },
> > { /* sentinel */ }
> > @@ -756,6 +768,7 @@ static int caam_probe(struct platform_device *pdev)
> > int pg_size;
> > int BLOCK_OFFSET = 0;
> > bool reg_access = true;
> > + const struct caam_imx_data *imx_soc_data;
> >
> > ctrlpriv = devm_kzalloc(&pdev->dev, sizeof(*ctrlpriv), GFP_KERNEL);
> > if (!ctrlpriv)
> > @@ -772,6 +785,15 @@ static int caam_probe(struct platform_device
> *pdev)
> > caam_imx = (bool)imx_soc_match;
> >
> > if (imx_soc_match) {
> > + if (imx_soc_match->data) {
> > + imx_soc_data = imx_soc_match->data;
> > + reg_access = imx_soc_data->page0_access;
> > + /*
> > + * CAAM clocks cannot be controlled from kernel.
> > + */
> > + if (!imx_soc_data->num_clks)
> > + goto iomap_ctrl;
>
> OPTEE enablement check is ignored because of this goto statement.
> Regards
> Gaurav Jain
[Accepted] Will be corrected in V2.
>
> > + }
> > /*
> > * Until Layerscape and i.MX OP-TEE get in sync,
> > * only i.MX OP-TEE use cases disallow access to @@ -781,7
> > +803,7 @@ static int caam_probe(struct platform_device *pdev)
> > ctrlpriv->optee_en = !!np;
> > of_node_put(np);
> >
> > - reg_access = !ctrlpriv->optee_en;
> > + reg_access = reg_access && !ctrlpriv->optee_en;
> >
> > if (!imx_soc_match->data) {
> > dev_err(dev, "No clock data provided for i.MX SoC");
> @@ -793,7
> > +815,7 @@ static int caam_probe(struct platform_device *pdev)
> > return ret;
> > }
> >
> > -
> > +iomap_ctrl:
> > /* Get configuration properties from device tree */
> > /* First, get register page */
> > ctrl = devm_of_iomap(dev, nprop, 0, NULL);
> > --
> > 2.34.1
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