12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091 |
- // SPDX-License-Identifier: GPL-2.0
- /*
- * arch/arm/cpu/armv7/rmobile/cpu_info-rcar.c
- *
- * Copyright (C) 2013,2014 Renesas Electronics Corporation
- */
- #include <common.h>
- #include <asm/io.h>
- #define PRR_MASK 0x7fff
- #define R8A7796_REV_1_0 0x5200
- #define R8A7796_REV_1_1 0x5210
- static u32 rmobile_get_prr(void);
- u32 rmobile_get_cpu_type(void)
- {
- return (rmobile_get_prr() & 0x00007F00) >> 8;
- }
- u32 rmobile_get_cpu_rev_integer(void)
- {
- const u32 prr = rmobile_get_prr();
- if ((prr & PRR_MASK) == R8A7796_REV_1_1)
- return 1;
- else
- return ((prr & 0x000000F0) >> 4) + 1;
- }
- u32 rmobile_get_cpu_rev_fraction(void)
- {
- const u32 prr = rmobile_get_prr();
- if ((prr & PRR_MASK) == R8A7796_REV_1_1)
- return 1;
- else
- return prr & 0x0000000F;
- }
- #if !CONFIG_IS_ENABLED(DM) || !CONFIG_IS_ENABLED(SYSCON)
- static u32 rmobile_get_prr(void)
- {
- /*
- * On RCar/RMobile Gen2 and older systems, the PRR is always
- * located at the address below. On newer systems, the PRR
- * may be located at different address, but that information
- * is obtained from DT. This code will be removed when all
- * of the older systems get converted to DM and OF control.
- */
- return readl(0xFF000044);
- }
- #else
- #include <dm.h>
- #include <syscon.h>
- #include <regmap.h>
- struct renesas_prr_priv {
- fdt_addr_t regs;
- };
- enum {
- PRR_RCAR,
- };
- static u32 rmobile_get_prr(void)
- {
- struct regmap *map;
- map = syscon_get_regmap_by_driver_data(PRR_RCAR);
- if (!map) {
- printf("PRR regmap failed!\n");
- hang();
- }
- return readl(map->ranges[0].start);
- }
- static const struct udevice_id renesas_prr_ids[] = {
- { .compatible = "renesas,prr", .data = PRR_RCAR },
- { }
- };
- U_BOOT_DRIVER(renesas_prr) = {
- .name = "renesas_prr",
- .id = UCLASS_SYSCON,
- .of_match = renesas_prr_ids,
- .flags = DM_FLAG_PRE_RELOC,
- };
- #endif
|