diff options
Diffstat (limited to 'drivers/soc/imx/soc-imx.c')
| -rw-r--r-- | drivers/soc/imx/soc-imx.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/drivers/soc/imx/soc-imx.c b/drivers/soc/imx/soc-imx.c new file mode 100644 index 000000000..1e8780299 --- /dev/null +++ b/drivers/soc/imx/soc-imx.c @@ -0,0 +1,199 @@ +// 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; + + /* Return early if this is running on devices with different SoCs */ + if (!__mxc_cpu_type) + return 0; + + if (of_machine_is_compatible("fsl,ls1021a")) + return 0; + + soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); + if (!soc_dev_attr) + return -ENOMEM; + + 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_MX1: + soc_id = "i.MX1"; + break; + case MXC_CPU_MX21: + soc_id = "i.MX21"; + break; + case MXC_CPU_MX25: + soc_id = "i.MX25"; + break; + case MXC_CPU_MX27: + soc_id = "i.MX27"; + break; + case MXC_CPU_MX31: + soc_id = "i.MX31"; + break; + case MXC_CPU_MX35: + soc_id = "i.MX35"; + break; + case MXC_CPU_MX51: + soc_id = "i.MX51"; + break; + case MXC_CPU_MX53: + soc_id = "i.MX53"; + break; + 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; + case MXC_CPU_VF500: + ocotp_compat = "fsl,vf610-ocotp"; + soc_id = "VF500"; + break; + case MXC_CPU_VF510: + ocotp_compat = "fsl,vf610-ocotp"; + soc_id = "VF510"; + break; + case MXC_CPU_VF600: + ocotp_compat = "fsl,vf610-ocotp"; + soc_id = "VF600"; + break; + case MXC_CPU_VF610: + ocotp_compat = "fsl,vf610-ocotp"; + soc_id = "VF610"; + 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) { + ret = -ENOMEM; + goto free_soc; + } + + soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX", soc_uid); + if (!soc_dev_attr->serial_number) { + ret = -ENOMEM; + goto free_rev; + } + + soc_dev = soc_device_register(soc_dev_attr); + if (IS_ERR(soc_dev)) { + ret = PTR_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 ret; +} +device_initcall(imx_soc_device_init); |