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Message-Id: <20190703081327.17505-3-andrew.smirnov@gmail.com>
Date: Wed, 3 Jul 2019 01:13:13 -0700
From: Andrey Smirnov <andrew.smirnov@...il.com>
To: linux-crypto@...r.kernel.org
Cc: Andrey Smirnov <andrew.smirnov@...il.com>,
Chris Spencer <christopher.spencer@....co.uk>,
Cory Tusar <cory.tusar@....aero>,
Chris Healy <cphealy@...il.com>,
Lucas Stach <l.stach@...gutronix.de>,
Horia Geantă <horia.geanta@....com>,
Aymen Sghaier <aymen.sghaier@....com>,
Leonard Crestez <leonard.crestez@....com>,
linux-kernel@...r.kernel.org
Subject: [PATCH v4 02/16] crypto: caam - simplify clock initialization
Simplify clock initialization code by converting it to use clk-bulk,
devres and soc_device_match() match table. No functional change
intended.
Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
Cc: Chris Spencer <christopher.spencer@....co.uk>
Cc: Cory Tusar <cory.tusar@....aero>
Cc: Chris Healy <cphealy@...il.com>
Cc: Lucas Stach <l.stach@...gutronix.de>
Cc: Horia Geantă <horia.geanta@....com>
Cc: Aymen Sghaier <aymen.sghaier@....com>
Cc: Leonard Crestez <leonard.crestez@....com>
Cc: linux-crypto@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
---
drivers/crypto/caam/ctrl.c | 203 +++++++++++++++++------------------
drivers/crypto/caam/intern.h | 7 +-
2 files changed, 98 insertions(+), 112 deletions(-)
diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index e674d8770cdb..908d3ecf6d1c 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -25,16 +25,6 @@ EXPORT_SYMBOL(caam_dpaa2);
#include "qi.h"
#endif
-/*
- * i.MX targets tend to have clock control subsystems that can
- * enable/disable clocking to our device.
- */
-static inline struct clk *caam_drv_identify_clk(struct device *dev,
- char *clk_name)
-{
- return caam_imx ? devm_clk_get(dev, clk_name) : NULL;
-}
-
/*
* Descriptor to instantiate RNG State Handle 0 in normal mode and
* load the JDKEK, TDKEK and TDSK registers
@@ -342,13 +332,6 @@ static int caam_remove(struct platform_device *pdev)
/* Unmap controller region */
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);
return 0;
}
@@ -497,20 +480,102 @@ static const struct of_device_id caam_match[] = {
};
MODULE_DEVICE_TABLE(of, caam_match);
+struct caam_imx_data {
+ const struct clk_bulk_data *clks;
+ int num_clks;
+};
+
+static const struct clk_bulk_data caam_imx6_clks[] = {
+ { .id = "ipg" },
+ { .id = "mem" },
+ { .id = "aclk" },
+ { .id = "emi_slow" },
+};
+
+static const struct caam_imx_data caam_imx6_data = {
+ .clks = caam_imx6_clks,
+ .num_clks = ARRAY_SIZE(caam_imx6_clks),
+};
+
+static const struct clk_bulk_data caam_imx7_clks[] = {
+ { .id = "ipg" },
+ { .id = "aclk" },
+};
+
+static const struct caam_imx_data caam_imx7_data = {
+ .clks = caam_imx7_clks,
+ .num_clks = ARRAY_SIZE(caam_imx7_clks),
+};
+
+static const struct clk_bulk_data caam_imx6ul_clks[] = {
+ { .id = "ipg" },
+ { .id = "mem" },
+ { .id = "aclk" },
+};
+
+static const struct caam_imx_data caam_imx6ul_data = {
+ .clks = caam_imx6ul_clks,
+ .num_clks = ARRAY_SIZE(caam_imx6ul_clks),
+};
+
+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 },
+ { .family = "Freescale i.MX" },
+};
+
+static void disable_clocks(void *data)
+{
+ struct caam_drv_private *ctrlpriv = data;
+
+ clk_bulk_disable_unprepare(ctrlpriv->num_clks, ctrlpriv->clks);
+}
+
+static int init_clocks(struct device *dev,
+ struct caam_drv_private *ctrlpriv,
+ const struct caam_imx_data *data)
+{
+ int ret;
+
+ ctrlpriv->num_clks = data->num_clks;
+ ctrlpriv->clks = devm_kmemdup(dev, data->clks,
+ data->num_clks * sizeof(data->clks[0]),
+ GFP_KERNEL);
+ if (!ctrlpriv->clks)
+ return -ENOMEM;
+
+ ret = devm_clk_bulk_get(dev, ctrlpriv->num_clks, ctrlpriv->clks);
+ if (ret) {
+ dev_err(dev,
+ "Failed to request all necessary clocks\n");
+ return ret;
+ }
+
+ ret = clk_bulk_prepare_enable(ctrlpriv->num_clks, ctrlpriv->clks);
+ if (ret) {
+ dev_err(dev,
+ "Failed to prepare/enable all necessary clocks\n");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(dev, disable_clocks, ctrlpriv);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
/* 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"},
- {},
- };
+ const struct soc_device_attribute *imx_soc_match;
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
@@ -527,91 +592,25 @@ static int caam_probe(struct platform_device *pdev)
dev_set_drvdata(dev, ctrlpriv);
nprop = pdev->dev.of_node;
- caam_imx = (bool)soc_device_match(imx_soc);
-
- /* Enable clocking */
- clk = caam_drv_identify_clk(&pdev->dev, "ipg");
- if (IS_ERR(clk)) {
- ret = PTR_ERR(clk);
- dev_err(&pdev->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") &&
- !of_machine_is_compatible("fsl,imx7ulp")) {
- clk = caam_drv_identify_clk(&pdev->dev, "mem");
- if (IS_ERR(clk)) {
- ret = PTR_ERR(clk);
- dev_err(&pdev->dev,
- "can't identify CAAM mem clk: %d\n", ret);
- return ret;
+ imx_soc_match = soc_device_match(caam_imx_soc_table);
+ if (imx_soc_match) {
+ if (!imx_soc_match->data) {
+ dev_err(dev, "No clock data provided for i.MX SoC");
+ return -EINVAL;
}
- ctrlpriv->caam_mem = clk;
- }
- clk = caam_drv_identify_clk(&pdev->dev, "aclk");
- if (IS_ERR(clk)) {
- ret = PTR_ERR(clk);
- dev_err(&pdev->dev,
- "can't identify CAAM aclk clk: %d\n", ret);
- return ret;
- }
- ctrlpriv->caam_aclk = clk;
-
- if (!of_machine_is_compatible("fsl,imx6ul") &&
- !of_machine_is_compatible("fsl,imx7d") &&
- !of_machine_is_compatible("fsl,imx7s") &&
- !of_machine_is_compatible("fsl,imx7ulp")) {
- clk = caam_drv_identify_clk(&pdev->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);
+ ret = init_clocks(dev, ctrlpriv, imx_soc_match->data);
+ if (ret)
return ret;
- }
- ctrlpriv->caam_emi_slow = clk;
- }
-
- ret = clk_prepare_enable(ctrlpriv->caam_ipg);
- if (ret < 0) {
- dev_err(&pdev->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",
- ret);
- goto disable_caam_ipg;
- }
- }
-
- ret = clk_prepare_enable(ctrlpriv->caam_aclk);
- if (ret < 0) {
- dev_err(&pdev->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",
- ret);
- goto disable_caam_aclk;
- }
}
+ caam_imx = (bool)imx_soc_match;
/* 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;
+ return -ENOMEM;
}
caam_little_end = !(bool)(rd_reg32(&ctrl->perfmon.status) &
@@ -899,16 +898,6 @@ static int caam_probe(struct platform_device *pdev)
#endif
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);
return ret;
}
diff --git a/drivers/crypto/caam/intern.h b/drivers/crypto/caam/intern.h
index ec25d260fa40..1f01703f510a 100644
--- a/drivers/crypto/caam/intern.h
+++ b/drivers/crypto/caam/intern.h
@@ -94,11 +94,8 @@ struct caam_drv_private {
Handles of the RNG4 block are initialized
by this driver */
- struct clk *caam_ipg;
- struct clk *caam_mem;
- struct clk *caam_aclk;
- struct clk *caam_emi_slow;
-
+ struct clk_bulk_data *clks;
+ int num_clks;
/*
* debugfs entries for developer view into driver/device
* variables at runtime.
--
2.21.0
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