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// 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
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