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_device_type(): tell if GP/HS/EMU/TST
56 u32
get_device_type(void)
59 mode
= readl(&cstat
->statusreg
) & (DEVICE_MASK
);
64 * get_sysboot_value(void) - return SYS_BOOT[4:0]
66 u32
get_sysboot_value(void)
68 return readl(&cstat
->statusreg
) & SYSBOOT_MASK
;
71 #ifdef CONFIG_DISPLAY_CPUINFO
72 static char *cpu_revs
[] = {
78 static char *dev_types
[] = {
85 * Print CPU information
87 int print_cpuinfo(void)
89 char *cpu_s
, *sec_s
, *rev_s
;
91 switch (get_cpu_type()) {
102 cpu_s
= "Unknown CPU type";
106 if (get_cpu_rev() < ARRAY_SIZE(cpu_revs
))
107 rev_s
= cpu_revs
[get_cpu_rev()];
111 if (get_device_type() < ARRAY_SIZE(dev_types
))
112 sec_s
= dev_types
[get_device_type()];
116 printf("CPU : %s-%s rev %s\n", cpu_s
, sec_s
, rev_s
);
120 #endif /* CONFIG_DISPLAY_CPUINFO */
123 int am335x_get_efuse_mpu_max_freq(struct ctrl_dev
*cdev
)
127 sil_rev
= readl(&cdev
->deviceid
) >> 28;
130 /* PG 2.0, efuse may not be set. */
132 else if (sil_rev
>= 2) {
133 /* Check what the efuse says our max speed is. */
134 int efuse_arm_mpu_max_freq
;
135 efuse_arm_mpu_max_freq
= readl(&cdev
->efuse_sma
);
136 switch ((efuse_arm_mpu_max_freq
& DEVICE_ID_MASK
)) {
137 case AM335X_ZCZ_1000
:
138 return MPUPLL_M_1000
;
152 /* PG 1.0 or otherwise unknown, use the PG1.0 max */
156 int am335x_get_tps65910_mpu_vdd(int sil_rev
, int frequency
)
158 /* For PG2.1 and later, we have one set of values. */
162 return TPS65910_OP_REG_SEL_1_3_2_5
;
164 return TPS65910_OP_REG_SEL_1_2_6
;
166 return TPS65910_OP_REG_SEL_1_2_0
;
169 return TPS65910_OP_REG_SEL_1_1_3
;
173 /* Default to PG1.0/PG2.0 values. */
174 return TPS65910_OP_REG_SEL_1_1_3
;