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![Fabio Estevam](/assets/img/avatar_default.png)
Since commit 4ebd29f916
("soc: imx: Register SoC device only on i.MX
boards") the soc-imx driver is only registered on i.MX platforms as
intended.
This means that we no longer need to do a specific check for
Layerscape.
Remove the now unneeded "fsl,ls1021a" check.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
211 lines
4.6 KiB
C
211 lines
4.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright 2020 NXP
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*/
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#include <linux/mfd/syscon.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <linux/sys_soc.h>
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#include <soc/imx/cpu.h>
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#include <soc/imx/revision.h>
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#define IIM_UID 0x820
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#define OCOTP_UID_H 0x420
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#define OCOTP_UID_L 0x410
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#define OCOTP_ULP_UID_1 0x4b0
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#define OCOTP_ULP_UID_2 0x4c0
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#define OCOTP_ULP_UID_3 0x4d0
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#define OCOTP_ULP_UID_4 0x4e0
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static int __init imx_soc_device_init(void)
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{
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struct soc_device_attribute *soc_dev_attr;
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const char *ocotp_compat = NULL;
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struct soc_device *soc_dev;
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struct device_node *root;
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struct regmap *ocotp = NULL;
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const char *soc_id;
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u64 soc_uid = 0;
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u32 val;
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int ret;
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int i;
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/* Return early if this is running on devices with different SoCs */
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if (!__mxc_cpu_type)
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return 0;
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soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
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if (!soc_dev_attr)
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return -ENOMEM;
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soc_dev_attr->family = "Freescale i.MX";
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root = of_find_node_by_path("/");
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ret = of_property_read_string(root, "model", &soc_dev_attr->machine);
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of_node_put(root);
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if (ret)
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goto free_soc;
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switch (__mxc_cpu_type) {
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case MXC_CPU_MX1:
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soc_id = "i.MX1";
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break;
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case MXC_CPU_MX21:
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soc_id = "i.MX21";
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break;
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case MXC_CPU_MX25:
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soc_id = "i.MX25";
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break;
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case MXC_CPU_MX27:
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soc_id = "i.MX27";
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break;
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case MXC_CPU_MX31:
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soc_id = "i.MX31";
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break;
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case MXC_CPU_MX35:
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soc_id = "i.MX35";
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break;
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case MXC_CPU_MX50:
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soc_id = "i.MX50";
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break;
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case MXC_CPU_MX51:
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ocotp_compat = "fsl,imx51-iim";
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soc_id = "i.MX51";
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break;
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case MXC_CPU_MX53:
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ocotp_compat = "fsl,imx53-iim";
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soc_id = "i.MX53";
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break;
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case MXC_CPU_IMX6SL:
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ocotp_compat = "fsl,imx6sl-ocotp";
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soc_id = "i.MX6SL";
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break;
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case MXC_CPU_IMX6DL:
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ocotp_compat = "fsl,imx6q-ocotp";
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soc_id = "i.MX6DL";
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break;
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case MXC_CPU_IMX6SX:
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ocotp_compat = "fsl,imx6sx-ocotp";
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soc_id = "i.MX6SX";
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break;
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case MXC_CPU_IMX6Q:
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ocotp_compat = "fsl,imx6q-ocotp";
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soc_id = "i.MX6Q";
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break;
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case MXC_CPU_IMX6UL:
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ocotp_compat = "fsl,imx6ul-ocotp";
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soc_id = "i.MX6UL";
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break;
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case MXC_CPU_IMX6ULL:
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ocotp_compat = "fsl,imx6ull-ocotp";
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soc_id = "i.MX6ULL";
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break;
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case MXC_CPU_IMX6ULZ:
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ocotp_compat = "fsl,imx6ull-ocotp";
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soc_id = "i.MX6ULZ";
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break;
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case MXC_CPU_IMX6SLL:
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ocotp_compat = "fsl,imx6sll-ocotp";
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soc_id = "i.MX6SLL";
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break;
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case MXC_CPU_IMX7D:
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ocotp_compat = "fsl,imx7d-ocotp";
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soc_id = "i.MX7D";
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break;
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case MXC_CPU_IMX7ULP:
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ocotp_compat = "fsl,imx7ulp-ocotp";
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soc_id = "i.MX7ULP";
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break;
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case MXC_CPU_VF500:
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ocotp_compat = "fsl,vf610-ocotp";
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soc_id = "VF500";
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break;
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case MXC_CPU_VF510:
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ocotp_compat = "fsl,vf610-ocotp";
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soc_id = "VF510";
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break;
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case MXC_CPU_VF600:
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ocotp_compat = "fsl,vf610-ocotp";
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soc_id = "VF600";
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break;
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case MXC_CPU_VF610:
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ocotp_compat = "fsl,vf610-ocotp";
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soc_id = "VF610";
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break;
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default:
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soc_id = "Unknown";
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}
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soc_dev_attr->soc_id = soc_id;
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if (ocotp_compat) {
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ocotp = syscon_regmap_lookup_by_compatible(ocotp_compat);
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if (IS_ERR(ocotp))
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pr_err("%s: failed to find %s regmap!\n", __func__, ocotp_compat);
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}
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if (!IS_ERR_OR_NULL(ocotp)) {
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if (__mxc_cpu_type == MXC_CPU_IMX7ULP) {
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regmap_read(ocotp, OCOTP_ULP_UID_4, &val);
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soc_uid = val & 0xffff;
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regmap_read(ocotp, OCOTP_ULP_UID_3, &val);
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soc_uid <<= 16;
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soc_uid |= val & 0xffff;
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regmap_read(ocotp, OCOTP_ULP_UID_2, &val);
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soc_uid <<= 16;
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soc_uid |= val & 0xffff;
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regmap_read(ocotp, OCOTP_ULP_UID_1, &val);
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soc_uid <<= 16;
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soc_uid |= val & 0xffff;
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} else if (__mxc_cpu_type == MXC_CPU_MX51 ||
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__mxc_cpu_type == MXC_CPU_MX53) {
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for (i=0; i < 8; i++) {
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regmap_read(ocotp, IIM_UID + i*4, &val);
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soc_uid <<= 8;
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soc_uid |= (val & 0xff);
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}
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} else {
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regmap_read(ocotp, OCOTP_UID_H, &val);
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soc_uid = val;
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regmap_read(ocotp, OCOTP_UID_L, &val);
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soc_uid <<= 32;
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soc_uid |= val;
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}
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}
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soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d.%d",
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(imx_get_soc_revision() >> 4) & 0xf,
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imx_get_soc_revision() & 0xf);
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if (!soc_dev_attr->revision) {
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ret = -ENOMEM;
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goto free_soc;
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}
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soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX", soc_uid);
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if (!soc_dev_attr->serial_number) {
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ret = -ENOMEM;
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goto free_rev;
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}
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soc_dev = soc_device_register(soc_dev_attr);
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if (IS_ERR(soc_dev)) {
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ret = PTR_ERR(soc_dev);
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goto free_serial_number;
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}
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return 0;
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free_serial_number:
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kfree(soc_dev_attr->serial_number);
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free_rev:
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kfree(soc_dev_attr->revision);
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free_soc:
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kfree(soc_dev_attr);
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return ret;
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}
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device_initcall(imx_soc_device_init);
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