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Subject[PATCH v2 1/4] crypto: caam - do not initialise clocks on the i.MX8
Date
From: Chris Spencer <christopher.spencer@sea.co.uk>

There are no clocks that the CAAM driver needs to initialise on the
i.MX8.

Signed-off-by: Aymen Sghaier <aymen.sghaier@nxp.com>
Signed-off-by: Chris Spencer <christopher.spencer@sea.co.uk>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Chris Spencer <christopher.spencer@sea.co.uk>
Cc: Cory Tusar <cory.tusar@zii.aero>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Horia Geantă <horia.geanta@nxp.com>
Cc: Aymen Sghaier <aymen.sghaier@nxp.com>
Cc: linux-crypto@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---
drivers/crypto/caam/ctrl.c | 146 +++++++++++++++++++++----------------
1 file changed, 85 insertions(+), 61 deletions(-)

diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index fec39c35c877..39334e71a14f 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -309,6 +309,19 @@ static int deinstantiate_rng(struct device *ctrldev, int state_handle_mask)
return ret;
}

+static void disable_clocking(struct caam_drv_private *ctrlpriv)
+{
+ if (of_machine_is_compatible("fsl,imx8mq"))
+ return;
+
+ clk_disable_unprepare(ctrlpriv->caam_ipg);
+ if (ctrlpriv->caam_mem)
+ clk_disable_unprepare(ctrlpriv->caam_mem);
+ clk_disable_unprepare(ctrlpriv->caam_aclk);
+ if (ctrlpriv->caam_emi_slow)
+ clk_disable_unprepare(ctrlpriv->caam_emi_slow);
+}
+
static int caam_remove(struct platform_device *pdev)
{
struct device *ctrldev;
@@ -343,12 +356,8 @@ static int caam_remove(struct platform_device *pdev)
iounmap(ctrl);

/* shut clocks off before finalizing shutdown */
- clk_disable_unprepare(ctrlpriv->caam_ipg);
- if (ctrlpriv->caam_mem)
- clk_disable_unprepare(ctrlpriv->caam_mem);
- clk_disable_unprepare(ctrlpriv->caam_aclk);
- if (ctrlpriv->caam_emi_slow)
- clk_disable_unprepare(ctrlpriv->caam_emi_slow);
+ disable_clocking(ctrlpriv);
+
return 0;
}

@@ -497,65 +506,38 @@ static const struct of_device_id caam_match[] = {
};
MODULE_DEVICE_TABLE(of, caam_match);

-/* Probe routine for CAAM top (controller) level */
-static int caam_probe(struct platform_device *pdev)
+static int init_clocking(struct device *dev, struct caam_drv_private *ctrlpriv)
{
- int ret, ring, gen_sk, ent_delay = RTSDCTL_ENT_DLY_MIN;
- u64 caam_id;
- static const struct soc_device_attribute imx_soc[] = {
- {.family = "Freescale i.MX"},
- {},
- };
- struct device *dev;
- struct device_node *nprop, *np;
- struct caam_ctrl __iomem *ctrl;
- struct caam_drv_private *ctrlpriv;
struct clk *clk;
-#ifdef CONFIG_DEBUG_FS
- struct caam_perfmon *perfmon;
-#endif
- u32 scfgr, comp_params;
- u8 rng_vid;
- int pg_size;
- int BLOCK_OFFSET = 0;
-
- ctrlpriv = devm_kzalloc(&pdev->dev, sizeof(*ctrlpriv), GFP_KERNEL);
- if (!ctrlpriv)
- return -ENOMEM;
-
- dev = &pdev->dev;
- dev_set_drvdata(dev, ctrlpriv);
- nprop = pdev->dev.of_node;
+ int ret;

- caam_imx = (bool)soc_device_match(imx_soc);
+ if (of_machine_is_compatible("fsl,imx8mq"))
+ return 0;

/* Enable clocking */
- clk = caam_drv_identify_clk(&pdev->dev, "ipg");
+ clk = caam_drv_identify_clk(dev, "ipg");
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
- dev_err(&pdev->dev,
- "can't identify CAAM ipg clk: %d\n", ret);
+ dev_err(dev, "can't identify CAAM ipg clk: %d\n", ret);
return ret;
}
ctrlpriv->caam_ipg = clk;

if (!of_machine_is_compatible("fsl,imx7d") &&
!of_machine_is_compatible("fsl,imx7s")) {
- clk = caam_drv_identify_clk(&pdev->dev, "mem");
+ clk = caam_drv_identify_clk(dev, "mem");
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
- dev_err(&pdev->dev,
- "can't identify CAAM mem clk: %d\n", ret);
+ dev_err(dev, "can't identify CAAM mem clk: %d\n", ret);
return ret;
}
ctrlpriv->caam_mem = clk;
}

- clk = caam_drv_identify_clk(&pdev->dev, "aclk");
+ clk = caam_drv_identify_clk(dev, "aclk");
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
- dev_err(&pdev->dev,
- "can't identify CAAM aclk clk: %d\n", ret);
+ dev_err(dev, "can't identify CAAM aclk clk: %d\n", ret);
return ret;
}
ctrlpriv->caam_aclk = clk;
@@ -563,11 +545,11 @@ static int caam_probe(struct platform_device *pdev)
if (!of_machine_is_compatible("fsl,imx6ul") &&
!of_machine_is_compatible("fsl,imx7d") &&
!of_machine_is_compatible("fsl,imx7s")) {
- clk = caam_drv_identify_clk(&pdev->dev, "emi_slow");
+ clk = caam_drv_identify_clk(dev, "emi_slow");
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
- dev_err(&pdev->dev,
- "can't identify CAAM emi_slow clk: %d\n", ret);
+ dev_err(dev, "can't identify CAAM emi_slow clk: %d\n",
+ ret);
return ret;
}
ctrlpriv->caam_emi_slow = clk;
@@ -575,14 +557,15 @@ static int caam_probe(struct platform_device *pdev)

ret = clk_prepare_enable(ctrlpriv->caam_ipg);
if (ret < 0) {
- dev_err(&pdev->dev, "can't enable CAAM ipg clock: %d\n", ret);
+ dev_err(dev, "can't enable CAAM ipg clock: %d\n", ret);
return ret;
}

if (ctrlpriv->caam_mem) {
ret = clk_prepare_enable(ctrlpriv->caam_mem);
if (ret < 0) {
- dev_err(&pdev->dev, "can't enable CAAM secure mem clock: %d\n",
+ dev_err(dev,
+ "can't enable CAAM secure mem clock: %d\n",
ret);
goto disable_caam_ipg;
}
@@ -590,26 +573,74 @@ static int caam_probe(struct platform_device *pdev)

ret = clk_prepare_enable(ctrlpriv->caam_aclk);
if (ret < 0) {
- dev_err(&pdev->dev, "can't enable CAAM aclk clock: %d\n", ret);
+ dev_err(dev, "can't enable CAAM aclk clock: %d\n", ret);
goto disable_caam_mem;
}

if (ctrlpriv->caam_emi_slow) {
ret = clk_prepare_enable(ctrlpriv->caam_emi_slow);
if (ret < 0) {
- dev_err(&pdev->dev, "can't enable CAAM emi slow clock: %d\n",
+ dev_err(dev, "can't enable CAAM emi slow clock: %d\n",
ret);
goto disable_caam_aclk;
}
}

+ return 0;
+
+disable_caam_aclk:
+ clk_disable_unprepare(ctrlpriv->caam_aclk);
+disable_caam_mem:
+ if (ctrlpriv->caam_mem)
+ clk_disable_unprepare(ctrlpriv->caam_mem);
+disable_caam_ipg:
+ clk_disable_unprepare(ctrlpriv->caam_ipg);
+
+ return ret;
+}
+
+/* Probe routine for CAAM top (controller) level */
+static int caam_probe(struct platform_device *pdev)
+{
+ int ret, ring, gen_sk, ent_delay = RTSDCTL_ENT_DLY_MIN;
+ u64 caam_id;
+ static const struct soc_device_attribute imx_soc[] = {
+ {.family = "Freescale i.MX"},
+ {},
+ };
+ struct device *dev;
+ struct device_node *nprop, *np;
+ struct caam_ctrl __iomem *ctrl;
+ struct caam_drv_private *ctrlpriv;
+#ifdef CONFIG_DEBUG_FS
+ struct caam_perfmon *perfmon;
+#endif
+ u32 scfgr, comp_params;
+ u8 rng_vid;
+ int pg_size;
+ int BLOCK_OFFSET = 0;
+
+ ctrlpriv = devm_kzalloc(&pdev->dev, sizeof(*ctrlpriv), GFP_KERNEL);
+ if (!ctrlpriv)
+ return -ENOMEM;
+
+ dev = &pdev->dev;
+ dev_set_drvdata(dev, ctrlpriv);
+ nprop = pdev->dev.of_node;
+
+ caam_imx = (bool)soc_device_match(imx_soc);
+
+ ret = init_clocking(dev, ctrlpriv);
+ if (ret)
+ return ret;
+
/* Get configuration properties from device tree */
/* First, get register page */
ctrl = of_iomap(nprop, 0);
if (ctrl == NULL) {
dev_err(dev, "caam: of_iomap() failed\n");
ret = -ENOMEM;
- goto disable_caam_emi_slow;
+ goto disable_clocks;
}

caam_little_end = !(bool)(rd_reg32(&ctrl->perfmon.status) &
@@ -900,16 +931,9 @@ static int caam_probe(struct platform_device *pdev)

iounmap_ctrl:
iounmap(ctrl);
-disable_caam_emi_slow:
- if (ctrlpriv->caam_emi_slow)
- clk_disable_unprepare(ctrlpriv->caam_emi_slow);
-disable_caam_aclk:
- clk_disable_unprepare(ctrlpriv->caam_aclk);
-disable_caam_mem:
- if (ctrlpriv->caam_mem)
- clk_disable_unprepare(ctrlpriv->caam_mem);
-disable_caam_ipg:
- clk_disable_unprepare(ctrlpriv->caam_ipg);
+disable_clocks:
+ disable_clocking(ctrlpriv);
+
return ret;
}

--
2.21.0
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