4 * System information functions
6 * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
8 * Derived from Beagle Board and 3430 SDP code by
9 * Richard Woodruff <r-woodruff2@ti.com>
10 * Syed Mohammed Khasim <khasim@ti.com>
12 * SPDX-License-Identifier: GPL-2.0+
17 #include <asm/arch/sys_proto.h>
18 #include <asm/arch/cpu.h>
19 #include <asm/arch/clock.h>
20 #include <power/tps65910.h>
21 #include <linux/compiler.h>
23 struct ctrl_stat *cstat = (struct ctrl_stat *)CTRL_BASE;
26 * get_cpu_rev(void) - extract rev info
33 id = readl(DEVICE_ID);
34 rev = (id >> 28) & 0xff;
40 * get_cpu_type(void) - extract cpu info
42 u32 get_cpu_type(void)
47 id = readl(DEVICE_ID);
48 partnum = (id >> 12) & 0xffff;
54 * get_board_rev() - setup to pass kernel board revision information
55 * returns: 0 for the ATAG REVISION tag value.
57 u32 __weak get_board_rev(void)
63 * get_device_type(): tell if GP/HS/EMU/TST
65 u32 get_device_type(void)
68 mode = readl(&cstat->statusreg) & (DEVICE_MASK);
73 * get_sysboot_value(void) - return SYS_BOOT[4:0]
75 u32 get_sysboot_value(void)
78 mode = readl(&cstat->statusreg) & (SYSBOOT_MASK);
82 #ifdef CONFIG_DISPLAY_CPUINFO
83 static char *cpu_revs[] = {
89 static char *dev_types[] = {
96 * Print CPU information
98 int print_cpuinfo(void)
100 char *cpu_s, *sec_s, *rev_s;
102 switch (get_cpu_type()) {
110 cpu_s = "Unknown CPU type";
114 if (get_cpu_rev() < ARRAY_SIZE(cpu_revs))
115 rev_s = cpu_revs[get_cpu_rev()];
119 if (get_device_type() < ARRAY_SIZE(dev_types))
120 sec_s = dev_types[get_device_type()];
124 printf("%s-%s rev %s\n", cpu_s, sec_s, rev_s);
128 #endif /* CONFIG_DISPLAY_CPUINFO */
131 int am335x_get_efuse_mpu_max_freq(struct ctrl_dev *cdev)
135 sil_rev = readl(&cdev->deviceid) >> 28;
138 /* PG 2.0, efuse may not be set. */
140 else if (sil_rev >= 2) {
141 /* Check what the efuse says our max speed is. */
142 int efuse_arm_mpu_max_freq;
143 efuse_arm_mpu_max_freq = readl(&cdev->efuse_sma);
144 switch ((efuse_arm_mpu_max_freq & DEVICE_ID_MASK)) {
145 case AM335X_ZCZ_1000:
146 return MPUPLL_M_1000;
160 /* PG 1.0 or otherwise unknown, use the PG1.0 max */
164 int am335x_get_tps65910_mpu_vdd(int sil_rev, int frequency)
166 /* For PG2.1 and later, we have one set of values. */
170 return TPS65910_OP_REG_SEL_1_3_2_5;
172 return TPS65910_OP_REG_SEL_1_2_6;
174 return TPS65910_OP_REG_SEL_1_2_0;
177 return TPS65910_OP_REG_SEL_1_1_3;
181 /* Default to PG1.0/PG2.0 values. */
182 return TPS65910_OP_REG_SEL_1_1_3;