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>
22 struct ctrl_stat
*cstat
= (struct ctrl_stat
*)CTRL_BASE
;
25 * get_cpu_rev(void) - extract rev info
32 id
= readl(DEVICE_ID
);
33 rev
= (id
>> 28) & 0xff;
39 * get_cpu_type(void) - extract cpu info
41 u32
get_cpu_type(void)
46 id
= readl(DEVICE_ID
);
47 partnum
= (id
>> 12) & 0xffff;
53 * get_board_rev() - setup to pass kernel board revision information
54 * returns:(bit[0-3] sub version, higher bit[7-4] is higher version)
56 u32
get_board_rev(void)
62 * get_device_type(): tell if GP/HS/EMU/TST
64 u32
get_device_type(void)
67 mode
= readl(&cstat
->statusreg
) & (DEVICE_MASK
);
72 * get_sysboot_value(void) - return SYS_BOOT[4:0]
74 u32
get_sysboot_value(void)
77 mode
= readl(&cstat
->statusreg
) & (SYSBOOT_MASK
);
81 #ifdef CONFIG_DISPLAY_CPUINFO
82 static char *cpu_revs
[] = {
88 static char *dev_types
[] = {
95 * Print CPU information
97 int print_cpuinfo(void)
99 char *cpu_s
, *sec_s
, *rev_s
;
101 switch (get_cpu_type()) {
109 cpu_s
= "Unknown CPU type";
113 if (get_cpu_rev() < ARRAY_SIZE(cpu_revs
))
114 rev_s
= cpu_revs
[get_cpu_rev()];
118 if (get_device_type() < ARRAY_SIZE(dev_types
))
119 sec_s
= dev_types
[get_device_type()];
123 printf("%s-%s rev %s\n", cpu_s
, sec_s
, rev_s
);
127 #endif /* CONFIG_DISPLAY_CPUINFO */
130 int am335x_get_efuse_mpu_max_freq(struct ctrl_dev
*cdev
)
134 sil_rev
= readl(&cdev
->deviceid
) >> 28;
137 /* PG 2.0, efuse may not be set. */
139 else if (sil_rev
>= 2) {
140 /* Check what the efuse says our max speed is. */
141 int efuse_arm_mpu_max_freq
;
142 efuse_arm_mpu_max_freq
= readl(&cdev
->efuse_sma
);
143 switch ((efuse_arm_mpu_max_freq
& DEVICE_ID_MASK
)) {
144 case AM335X_ZCZ_1000
:
145 return MPUPLL_M_1000
;
159 /* PG 1.0 or otherwise unknown, use the PG1.0 max */
163 int am335x_get_tps65910_mpu_vdd(int sil_rev
, int frequency
)
165 /* For PG2.1 and later, we have one set of values. */
169 return TPS65910_OP_REG_SEL_1_3_2_5
;
171 return TPS65910_OP_REG_SEL_1_2_6
;
173 return TPS65910_OP_REG_SEL_1_2_0
;
176 return TPS65910_OP_REG_SEL_1_1_3
;
180 /* Default to PG1.0/PG2.0 values. */
181 return TPS65910_OP_REG_SEL_1_1_3
;