[PATCH V1 4/4] soc: imx: move cpu code to drivers/soc/imx

peng.fan
2020-03-12T09:24:35Z

Move the soc device register code to drivers/soc/imx to align with
i.MX8.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
arch/arm/mach-imx/cpu.c | 136 ------------------------------------------
drivers/soc/imx/Makefile | 3 +
drivers/soc/imx/soc-imx.c | 146 ++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 149 insertions(+), 136 deletions(-)
create mode 100644 drivers/soc/imx/soc-imx.c

diff --git a/arch/arm/mach-imx/cpu.c b/arch/arm/mach-imx/cpu.c
index 0302cb66134b..65c7224f5250 100644
--- a/arch/arm/mach-imx/cpu.c
+++ b/arch/arm/mach-imx/cpu.c
@@ -1,25 +1,13 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/err.h>
-#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
-#include <linux/regmap.h>
-#include <linux/slab.h>
-#include <linux/sys_soc.h>

#include "hardware.h"
#include "common.h"

-#define OCOTP_UID_H 0x420
-#define OCOTP_UID_L 0x410
-
-#define OCOTP_ULP_UID_1 0x4b0
-#define OCOTP_ULP_UID_2 0x4c0
-#define OCOTP_ULP_UID_3 0x4d0
-#define OCOTP_ULP_UID_4 0x4e0
-
unsigned int __mxc_cpu_type;
static unsigned int imx_soc_revision;

@@ -82,127 +70,3 @@ void __init imx_aips_allow_unprivileged_access(
imx_set_aips(aips_base_addr);
}
}
-
-static int __init imx_soc_device_init(void)
-{
- struct soc_device_attribute *soc_dev_attr;
- const char *ocotp_compat = NULL;
- struct soc_device *soc_dev;
- struct device_node *root;
- struct regmap *ocotp = NULL;
- const char *soc_id;
- u64 soc_uid = 0;
- u32 val;
- int ret;
-
- soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
- if (!soc_dev_attr)
- return PTR_ERR(soc_dev_attr);
-
- soc_dev_attr->family = "Freescale i.MX";
-
- root = of_find_node_by_path("/");
- ret = of_property_read_string(root, "model", &soc_dev_attr->machine);
- of_node_put(root);
- if (ret)
- goto free_soc;
-
- switch (__mxc_cpu_type) {
- case MXC_CPU_IMX6SL:
- ocotp_compat = "fsl,imx6sl-ocotp";
- soc_id = "i.MX6SL";
- break;
- case MXC_CPU_IMX6DL:
- ocotp_compat = "fsl,imx6q-ocotp";
- soc_id = "i.MX6DL";
- break;
- case MXC_CPU_IMX6SX:
- ocotp_compat = "fsl,imx6sx-ocotp";
- soc_id = "i.MX6SX";
- break;
- case MXC_CPU_IMX6Q:
- ocotp_compat = "fsl,imx6q-ocotp";
- soc_id = "i.MX6Q";
- break;
- case MXC_CPU_IMX6UL:
- ocotp_compat = "fsl,imx6ul-ocotp";
- soc_id = "i.MX6UL";
- break;
- case MXC_CPU_IMX6ULL:
- ocotp_compat = "fsl,imx6ull-ocotp";
- soc_id = "i.MX6ULL";
- break;
- case MXC_CPU_IMX6ULZ:
- ocotp_compat = "fsl,imx6ull-ocotp";
- soc_id = "i.MX6ULZ";
- break;
- case MXC_CPU_IMX6SLL:
- ocotp_compat = "fsl,imx6sll-ocotp";
- soc_id = "i.MX6SLL";
- break;
- case MXC_CPU_IMX7D:
- ocotp_compat = "fsl,imx7d-ocotp";
- soc_id = "i.MX7D";
- break;
- case MXC_CPU_IMX7ULP:
- ocotp_compat = "fsl,imx7ulp-ocotp";
- soc_id = "i.MX7ULP";
- break;
- default:
- soc_id = "Unknown";
- }
- soc_dev_attr->soc_id = soc_id;
-
- if (ocotp_compat) {
- ocotp = syscon_regmap_lookup_by_compatible(ocotp_compat);
- if (IS_ERR(ocotp))
- pr_err("%s: failed to find %s regmap!\n", __func__, ocotp_compat);
- }
-
- if (!IS_ERR_OR_NULL(ocotp)) {
- if (__mxc_cpu_type == MXC_CPU_IMX7ULP) {
- regmap_read(ocotp, OCOTP_ULP_UID_4, &val);
- soc_uid = val & 0xffff;
- regmap_read(ocotp, OCOTP_ULP_UID_3, &val);
- soc_uid <<= 16;
- soc_uid |= val & 0xffff;
- regmap_read(ocotp, OCOTP_ULP_UID_2, &val);
- soc_uid <<= 16;
- soc_uid |= val & 0xffff;
- regmap_read(ocotp, OCOTP_ULP_UID_1, &val);
- soc_uid <<= 16;
- soc_uid |= val & 0xffff;
- } else {
- regmap_read(ocotp, OCOTP_UID_H, &val);
- soc_uid = val;
- regmap_read(ocotp, OCOTP_UID_L, &val);
- soc_uid <<= 32;
- soc_uid |= val;
- }
- }
-
- soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d.%d",
- (imx_soc_revision >> 4) & 0xf,
- imx_soc_revision & 0xf);
- if (!soc_dev_attr->revision)
- goto free_soc;
-
- soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX", soc_uid);
- if (!soc_dev_attr->serial_number)
- goto free_rev;
-
- soc_dev = soc_device_register(soc_dev_attr);
- if (IS_ERR(soc_dev))
- goto free_serial_number;
-
- return 0;
-
-free_serial_number:
- kfree(soc_dev_attr->serial_number);
-free_rev:
- kfree(soc_dev_attr->revision);
-free_soc:
- kfree(soc_dev_attr);
- return -ENOMEM;
-}
-device_initcall(imx_soc_device_init);
diff --git a/drivers/soc/imx/Makefile b/drivers/soc/imx/Makefile
index 103e2c93c342..45dd49df3044 100644
--- a/drivers/soc/imx/Makefile
+++ b/drivers/soc/imx/Makefile
@@ -1,5 +1,8 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o
obj-$(CONFIG_IMX_GPCV2_PM_DOMAINS) += gpcv2.o
+obj-$(CONFIG_SOC_IMX6)+= soc-imx.o
+obj-$(CONFIG_SOC_IMX7D)+= soc-imx.o
+obj-$(CONFIG_SOC_IMX7ULP)+= soc-imx.o
obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o
obj-$(CONFIG_IMX_SCU_SOC) += soc-imx-scu.o
diff --git a/drivers/soc/imx/soc-imx.c b/drivers/soc/imx/soc-imx.c
new file mode 100644
index 000000000000..e01c7ccf1f4b
--- /dev/null
+++ b/drivers/soc/imx/soc-imx.c
@@ -0,0 +1,146 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2020 NXP.
+ */
+
+#include <linux/mfd/syscon.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/sys_soc.h>
+
+#include <soc/imx/cpu.h>
+#include <soc/imx/revision.h>
+
+#define OCOTP_UID_H 0x420
+#define OCOTP_UID_L 0x410
+
+#define OCOTP_ULP_UID_1 0x4b0
+#define OCOTP_ULP_UID_2 0x4c0
+#define OCOTP_ULP_UID_3 0x4d0
+#define OCOTP_ULP_UID_4 0x4e0
+
+static int __init imx_soc_device_init(void)
+{
+ struct soc_device_attribute *soc_dev_attr;
+ const char *ocotp_compat = NULL;
+ struct soc_device *soc_dev;
+ struct device_node *root;
+ struct regmap *ocotp = NULL;
+ const char *soc_id;
+ u64 soc_uid = 0;
+ u32 val;
+ int ret;
+
+ soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+ if (!soc_dev_attr)
+ return PTR_ERR(soc_dev_attr);
+
+ soc_dev_attr->family = "Freescale i.MX";
+
+ root = of_find_node_by_path("/");
+ ret = of_property_read_string(root, "model", &soc_dev_attr->machine);
+ of_node_put(root);
+ if (ret)
+ goto free_soc;
+
+ switch (__mxc_cpu_type) {
+ case MXC_CPU_IMX6SL:
+ ocotp_compat = "fsl,imx6sl-ocotp";
+ soc_id = "i.MX6SL";
+ break;
+ case MXC_CPU_IMX6DL:
+ ocotp_compat = "fsl,imx6q-ocotp";
+ soc_id = "i.MX6DL";
+ break;
+ case MXC_CPU_IMX6SX:
+ ocotp_compat = "fsl,imx6sx-ocotp";
+ soc_id = "i.MX6SX";
+ break;
+ case MXC_CPU_IMX6Q:
+ ocotp_compat = "fsl,imx6q-ocotp";
+ soc_id = "i.MX6Q";
+ break;
+ case MXC_CPU_IMX6UL:
+ ocotp_compat = "fsl,imx6ul-ocotp";
+ soc_id = "i.MX6UL";
+ break;
+ case MXC_CPU_IMX6ULL:
+ ocotp_compat = "fsl,imx6ull-ocotp";
+ soc_id = "i.MX6ULL";
+ break;
+ case MXC_CPU_IMX6ULZ:
+ ocotp_compat = "fsl,imx6ull-ocotp";
+ soc_id = "i.MX6ULZ";
+ break;
+ case MXC_CPU_IMX6SLL:
+ ocotp_compat = "fsl,imx6sll-ocotp";
+ soc_id = "i.MX6SLL";
+ break;
+ case MXC_CPU_IMX7D:
+ ocotp_compat = "fsl,imx7d-ocotp";
+ soc_id = "i.MX7D";
+ break;
+ case MXC_CPU_IMX7ULP:
+ ocotp_compat = "fsl,imx7ulp-ocotp";
+ soc_id = "i.MX7ULP";
+ break;
+ default:
+ soc_id = "Unknown";
+ }
+ soc_dev_attr->soc_id = soc_id;
+
+ if (ocotp_compat) {
+ ocotp = syscon_regmap_lookup_by_compatible(ocotp_compat);
+ if (IS_ERR(ocotp))
+ pr_err("%s: failed to find %s regmap!\n", __func__, ocotp_compat);
+ }
+
+ if (!IS_ERR_OR_NULL(ocotp)) {
+ if (__mxc_cpu_type == MXC_CPU_IMX7ULP) {
+ regmap_read(ocotp, OCOTP_ULP_UID_4, &val);
+ soc_uid = val & 0xffff;
+ regmap_read(ocotp, OCOTP_ULP_UID_3, &val);
+ soc_uid <<= 16;
+ soc_uid |= val & 0xffff;
+ regmap_read(ocotp, OCOTP_ULP_UID_2, &val);
+ soc_uid <<= 16;
+ soc_uid |= val & 0xffff;
+ regmap_read(ocotp, OCOTP_ULP_UID_1, &val);
+ soc_uid <<= 16;
+ soc_uid |= val & 0xffff;
+ } else {
+ regmap_read(ocotp, OCOTP_UID_H, &val);
+ soc_uid = val;
+ regmap_read(ocotp, OCOTP_UID_L, &val);
+ soc_uid <<= 32;
+ soc_uid |= val;
+ }
+ }
+
+ soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d.%d",
+ (imx_get_soc_revision() >> 4) & 0xf,
+ imx_get_soc_revision() & 0xf);
+ if (!soc_dev_attr->revision)
+ goto free_soc;
+
+ soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX", soc_uid);
+ if (!soc_dev_attr->serial_number)
+ goto free_rev;
+
+ soc_dev = soc_device_register(soc_dev_attr);
+ if (IS_ERR(soc_dev))
+ goto free_serial_number;
+
+ return 0;
+
+free_serial_number:
+ kfree(soc_dev_attr->serial_number);
+free_rev:
+ kfree(soc_dev_attr->revision);
+free_soc:
+ kfree(soc_dev_attr);
+ return -ENOMEM;
+}
+device_initcall(imx_soc_device_init);
--
2.16.4