diff options
| author | Fabio Estevam <fabio.estevam@nxp.com> | 2017-11-27 10:25:09 -0200 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2017-12-29 11:18:59 +0100 |
| commit | 4555c26142f893aa5d23f95c8eb3982e4a05b334 (patch) | |
| tree | 1dd321cf3b94548dc841b60868173e002f947556 /arch | |
| parent | 9a7295831e23fd3ff68b54992cdace1a1c8249e2 (diff) | |
imx: Add a common way for detecting NXP boards revision
NXP development boards based on i.MX6/i.MX7 contain the board
revision information stored in the fuses.
Introduce a common function that can be shared by different boards and
convert mx6sabreauto to use this new mechanism.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/include/asm/mach-imx/sys_proto.h | 3 | ||||
| -rw-r--r-- | arch/arm/mach-imx/Kconfig | 8 | ||||
| -rw-r--r-- | arch/arm/mach-imx/cpu.c | 25 |
3 files changed, 36 insertions, 0 deletions
diff --git a/arch/arm/include/asm/mach-imx/sys_proto.h b/arch/arm/include/asm/mach-imx/sys_proto.h index a80a392a73..5184e00972 100644 --- a/arch/arm/include/asm/mach-imx/sys_proto.h +++ b/arch/arm/include/asm/mach-imx/sys_proto.h @@ -109,6 +109,9 @@ void imx_wdog_disable_powerdown(void); int board_mmc_get_env_dev(int devno); +int nxp_board_rev(void); +char nxp_board_rev_string(void); + /* * Initializes on-chip ethernet controllers. * to override, implement board_eth_init() diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig index cd8b8d2882..81ab1256ec 100644 --- a/arch/arm/mach-imx/Kconfig +++ b/arch/arm/mach-imx/Kconfig @@ -61,3 +61,11 @@ config CMD_HDMIDETECT help This enables the 'hdmidet' command which detects if an HDMI monitor is connected. + +config NXP_BOARD_REVISION + bool "Read NXP board revision from fuses" + depends on ARCH_MX6 || ARCH_MX7 + help + NXP boards based on i.MX6/7 contain the board revision information + stored in the fuses. Select this option if you want to be able to + retrieve the board revision information. diff --git a/arch/arm/mach-imx/cpu.c b/arch/arm/mach-imx/cpu.c index 18205dc984..a32ab87e9b 100644 --- a/arch/arm/mach-imx/cpu.c +++ b/arch/arm/mach-imx/cpu.c @@ -323,3 +323,28 @@ void set_chipselect_size(int const cs_size) writel(reg, &iomuxc_regs->gpr[1]); } + +#ifdef CONFIG_NXP_BOARD_REVISION +int nxp_board_rev(void) +{ + /* + * Get Board ID information from OCOTP_GP1[15:8] + * RevA: 0x1 + * RevB: 0x2 + * RevC: 0x3 + */ + struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR; + struct fuse_bank *bank = &ocotp->bank[4]; + struct fuse_bank4_regs *fuse = + (struct fuse_bank4_regs *)bank->fuse_regs; + + return (readl(&fuse->gp1) >> 8 & 0x0F); +} + +char nxp_board_rev_string(void) +{ + const char *rev = "A"; + + return (*rev + nxp_board_rev() - 1); +} +#endif |