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| author | Fabio Estevam <fabio.estevam@freescale.com> | 2012-10-02 11:20:12 +0000 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2012-10-16 12:35:11 +0200 |
| commit | dce67bd548a8c21bf0998806825b0b90fce0e48d (patch) | |
| tree | e3ac439e1a4e47bdbdb817a0e3e0faed71857f7a | |
| parent | 903e779c5537e1c87470f911a178e4463984e562 (diff) | |
| download | u-boot-imx-dce67bd548a8c21bf0998806825b0b90fce0e48d.zip u-boot-imx-dce67bd548a8c21bf0998806825b0b90fce0e48d.tar.gz u-boot-imx-dce67bd548a8c21bf0998806825b0b90fce0e48d.tar.bz2 | |
mx6qsabreauto: Pass the board revision to the kernel
The kernel from Freescale expects that the bootloader passes the board revision.
Read the board revision and pass it via get_board_rev().
Without passing the board revision the kernel does not operate properly as the
initialization of peripherals are different in revA versus revB boards.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
| -rw-r--r-- | arch/arm/include/asm/arch-mx6/imx-regs.h | 6 | ||||
| -rw-r--r-- | board/freescale/mx6qsabreauto/mx6qsabreauto.c | 48 |
2 files changed, 52 insertions, 2 deletions
diff --git a/arch/arm/include/asm/arch-mx6/imx-regs.h b/arch/arm/include/asm/arch-mx6/imx-regs.h index dc737ba..09ab010 100644 --- a/arch/arm/include/asm/arch-mx6/imx-regs.h +++ b/arch/arm/include/asm/arch-mx6/imx-regs.h @@ -200,6 +200,12 @@ struct src { u32 gpr10; }; +/* OCOTP Registers */ +struct ocotp_regs { + u32 reserved[0x198]; + u32 gp1; /* 0x660 */ +}; + /* GPR3 bitfields */ #define IOMUXC_GPR3_GPU_DBG_OFFSET 29 #define IOMUXC_GPR3_GPU_DBG_MASK (3<<IOMUXC_GPR3_GPU_DBG_OFFSET) diff --git a/board/freescale/mx6qsabreauto/mx6qsabreauto.c b/board/freescale/mx6qsabreauto/mx6qsabreauto.c index 17ff8ff..bd87901 100644 --- a/board/freescale/mx6qsabreauto/mx6qsabreauto.c +++ b/board/freescale/mx6qsabreauto/mx6qsabreauto.c @@ -30,6 +30,8 @@ #include <fsl_esdhc.h> #include <miiphy.h> #include <netdev.h> +#include <asm/arch/sys_proto.h> + DECLARE_GLOBAL_DATA_PTR; #define UART_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE | \ @@ -165,9 +167,38 @@ int board_eth_init(bd_t *bis) return 0; } +#define BOARD_REV_B 0x200 +#define BOARD_REV_A 0x100 + +static int mx6sabre_rev(void) +{ + /* + * Get Board ID information from OCOTP_GP1[15:8] + * i.MX6Q ARD RevA: 0x01 + * i.MX6Q ARD RevB: 0x02 + */ + struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR; + int reg = readl(&ocotp->gp1); + int ret; + + switch (reg >> 8 & 0x0F) { + case 0x02: + ret = BOARD_REV_B; + break; + case 0x01: + default: + ret = BOARD_REV_A; + break; + } + + return ret; +} + u32 get_board_rev(void) { - return 0x63000; + int rev = mx6sabre_rev(); + + return (get_cpu_rev() & ~(0xF << 8)) | rev; } int board_early_init_f(void) @@ -187,7 +218,20 @@ int board_init(void) int checkboard(void) { - puts("Board: MX6Q-Sabreauto\n"); + int rev = mx6sabre_rev(); + char *revname; + + switch (rev) { + case BOARD_REV_B: + revname = "B"; + break; + case BOARD_REV_A: + default: + revname = "A"; + break; + } + + printf("Board: MX6Q-Sabreauto rev%s\n", revname); return 0; } |