diff options
Diffstat (limited to 'arch/arm/mach-rmobile/cpu_info-rcar.c')
| -rw-r--r-- | arch/arm/mach-rmobile/cpu_info-rcar.c | 61 |
1 files changed, 57 insertions, 4 deletions
diff --git a/arch/arm/mach-rmobile/cpu_info-rcar.c b/arch/arm/mach-rmobile/cpu_info-rcar.c index c373eef73d..b443611cbb 100644 --- a/arch/arm/mach-rmobile/cpu_info-rcar.c +++ b/arch/arm/mach-rmobile/cpu_info-rcar.c @@ -8,19 +8,20 @@ #include <common.h> #include <asm/io.h> -#define PRR 0xFF000044 #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 (readl(PRR) & 0x00007F00) >> 8; + return (rmobile_get_prr() & 0x00007F00) >> 8; } u32 rmobile_get_cpu_rev_integer(void) { - const u32 prr = readl(PRR); + const u32 prr = rmobile_get_prr(); if ((prr & PRR_MASK) == R8A7796_REV_1_1) return 1; @@ -30,10 +31,62 @@ u32 rmobile_get_cpu_rev_integer(void) u32 rmobile_get_cpu_rev_fraction(void) { - const u32 prr = readl(PRR); + 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->base); +} + +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 |