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>
21 #define JTAG_ID_VARIANT_SHIFT 28
22 #define JTAG_ID_VARIANT_MASK (0xf << 28)
23 #define JTAG_ID_PARTNO_SHIFT 12
24 #define JTAG_ID_PARTNO_MASK (0xffff << 12)
26 struct soc_ti_k3_plat {
31 static const char *get_family_string(u32 idreg)
36 soc = (idreg & JTAG_ID_PARTNO_MASK) >> JTAG_ID_PARTNO_SHIFT;
52 family = "Unknown Silicon";
58 static const char *get_rev_string(u32 idreg)
63 rev = (idreg & JTAG_ID_VARIANT_MASK) >> JTAG_ID_VARIANT_SHIFT;
73 revision = "Unknown Revision";
79 static int soc_ti_k3_get_family(struct udevice *dev, char *buf, int size)
81 struct soc_ti_k3_plat *plat = dev_get_plat(dev);
83 snprintf(buf, size, "%s", plat->family);
88 static int soc_ti_k3_get_revision(struct udevice *dev, char *buf, int size)
90 struct soc_ti_k3_plat *plat = dev_get_plat(dev);
92 snprintf(buf, size, "SR%s", plat->revision);
97 static const struct soc_ops soc_ti_k3_ops = {
98 .get_family = soc_ti_k3_get_family,
99 .get_revision = soc_ti_k3_get_revision,
102 int soc_ti_k3_probe(struct udevice *dev)
104 struct soc_ti_k3_plat *plat = dev_get_plat(dev);
108 idreg_addr = dev_read_addr_ptr(dev);
112 idreg = readl(idreg_addr);
114 plat->family = get_family_string(idreg);
115 plat->revision = get_rev_string(idreg);
120 static const struct udevice_id soc_ti_k3_ids[] = {
121 { .compatible = "ti,am654-chipid" },
125 U_BOOT_DRIVER(soc_ti_k3) = {
128 .ops = &soc_ti_k3_ops,
129 .of_match = soc_ti_k3_ids,
130 .probe = soc_ti_k3_probe,
131 .plat_auto = sizeof(struct soc_ti_k3_plat),