1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
4 * Dave Gerlach <d-gerlach@ti.com>
19 #define JTAG_ID_VARIANT_SHIFT 28
20 #define JTAG_ID_VARIANT_MASK (0xf << 28)
21 #define JTAG_ID_PARTNO_SHIFT 12
22 #define JTAG_ID_PARTNO_MASK (0xffff << 12)
24 struct soc_ti_k3_platdata {
29 static const char *get_family_string(u32 idreg)
34 soc = (idreg & JTAG_ID_PARTNO_MASK) >> JTAG_ID_PARTNO_SHIFT;
44 family = "Unknown Silicon";
50 static const char *get_rev_string(u32 idreg)
55 rev = (idreg & JTAG_ID_VARIANT_MASK) >> JTAG_ID_VARIANT_SHIFT;
65 revision = "Unknown Revision";
71 static int soc_ti_k3_get_family(struct udevice *dev, char *buf, int size)
73 struct soc_ti_k3_platdata *plat = dev_get_platdata(dev);
75 snprintf(buf, size, "%s", plat->family);
80 static int soc_ti_k3_get_revision(struct udevice *dev, char *buf, int size)
82 struct soc_ti_k3_platdata *plat = dev_get_platdata(dev);
84 snprintf(buf, size, "SR%s", plat->revision);
89 static const struct soc_ops soc_ti_k3_ops = {
90 .get_family = soc_ti_k3_get_family,
91 .get_revision = soc_ti_k3_get_revision,
94 int soc_ti_k3_probe(struct udevice *dev)
96 struct soc_ti_k3_platdata *plat = dev_get_platdata(dev);
100 idreg_addr = dev_read_addr_ptr(dev);
104 idreg = readl(idreg_addr);
106 plat->family = get_family_string(idreg);
107 plat->revision = get_rev_string(idreg);
112 static const struct udevice_id soc_ti_k3_ids[] = {
113 { .compatible = "ti,am654-chipid" },
117 U_BOOT_DRIVER(soc_ti_k3) = {
120 .ops = &soc_ti_k3_ops,
121 .of_match = soc_ti_k3_ids,
122 .probe = soc_ti_k3_probe,
123 .platdata_auto_alloc_size = sizeof(struct soc_ti_k3_platdata),