diff options
Diffstat (limited to 'plat/allwinner/common/sunxi_common.c')
| -rw-r--r-- | plat/allwinner/common/sunxi_common.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/plat/allwinner/common/sunxi_common.c b/plat/allwinner/common/sunxi_common.c index 9069a17d..fc9bf209 100644 --- a/plat/allwinner/common/sunxi_common.c +++ b/plat/allwinner/common/sunxi_common.c @@ -4,6 +4,7 @@ * SPDX-License-Identifier: BSD-3-Clause */ +#include <mmio.h> #include <platform.h> #include <platform_def.h> #include <sunxi_def.h> @@ -54,3 +55,19 @@ void sunxi_configure_mmu_el3(int flags) enable_mmu_el3(0); } + +#define SRAM_VER_REG (SUNXI_SYSCON_BASE + 0x24) +uint16_t sunxi_read_soc_id(void) +{ + uint32_t reg = mmio_read_32(SRAM_VER_REG); + + /* Set bit 15 to prepare for the SOCID read. */ + mmio_write_32(SRAM_VER_REG, reg | BIT(15)); + + reg = mmio_read_32(SRAM_VER_REG); + + /* deactivate the SOCID access again */ + mmio_write_32(SRAM_VER_REG, reg & ~BIT(15)); + + return reg >> 16; +} |