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>
20 #define JTAG_ID_VARIANT_SHIFT 28
21 #define JTAG_ID_VARIANT_MASK (0xf << 28)
22 #define JTAG_ID_PARTNO_SHIFT 12
23 #define JTAG_ID_PARTNO_MASK (0xffff << 12)
25 struct soc_ti_k3_platdata {
30 static const char *get_family_string(u32 idreg)
35 soc = (idreg & JTAG_ID_PARTNO_MASK) >> JTAG_ID_PARTNO_SHIFT;
48 family = "Unknown Silicon";
54 static const char *get_rev_string(u32 idreg)
59 rev = (idreg & JTAG_ID_VARIANT_MASK) >> JTAG_ID_VARIANT_SHIFT;
69 revision = "Unknown Revision";
75 static int soc_ti_k3_get_family(struct udevice *dev, char *buf, int size)
77 struct soc_ti_k3_platdata *plat = dev_get_platdata(dev);
79 snprintf(buf, size, "%s", plat->family);
84 static int soc_ti_k3_get_revision(struct udevice *dev, char *buf, int size)
86 struct soc_ti_k3_platdata *plat = dev_get_platdata(dev);
88 snprintf(buf, size, "SR%s", plat->revision);
93 static const struct soc_ops soc_ti_k3_ops = {
94 .get_family = soc_ti_k3_get_family,
95 .get_revision = soc_ti_k3_get_revision,
98 int soc_ti_k3_probe(struct udevice *dev)
100 struct soc_ti_k3_platdata *plat = dev_get_platdata(dev);
104 idreg_addr = dev_read_addr_ptr(dev);
108 idreg = readl(idreg_addr);
110 plat->family = get_family_string(idreg);
111 plat->revision = get_rev_string(idreg);
116 static const struct udevice_id soc_ti_k3_ids[] = {
117 { .compatible = "ti,am654-chipid" },
121 U_BOOT_DRIVER(soc_ti_k3) = {
124 .ops = &soc_ti_k3_ops,
125 .of_match = soc_ti_k3_ids,
126 .probe = soc_ti_k3_probe,
127 .platdata_auto = sizeof(struct soc_ti_k3_platdata),