From 4555c26142f893aa5d23f95c8eb3982e4a05b334 Mon Sep 17 00:00:00 2001 From: Fabio Estevam Date: Mon, 27 Nov 2017 10:25:09 -0200 Subject: [PATCH] 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 --- arch/arm/include/asm/mach-imx/sys_proto.h | 3 ++ arch/arm/mach-imx/Kconfig | 8 ++++ arch/arm/mach-imx/cpu.c | 25 +++++++++++ board/freescale/mx6sabreauto/mx6sabreauto.c | 47 +-------------------- configs/mx6sabreauto_defconfig | 1 + 5 files changed, 39 insertions(+), 45 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 diff --git a/board/freescale/mx6sabreauto/mx6sabreauto.c b/board/freescale/mx6sabreauto/mx6sabreauto.c index bdeb5f7667..9c83e350d4 100644 --- a/board/freescale/mx6sabreauto/mx6sabreauto.c +++ b/board/freescale/mx6sabreauto/mx6sabreauto.c @@ -397,39 +397,9 @@ int board_eth_init(bd_t *bis) return cpu_eth_init(bis); } -#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; - struct fuse_bank *bank = &ocotp->bank[4]; - struct fuse_bank4_regs *fuse = - (struct fuse_bank4_regs *)bank->fuse_regs; - int reg = readl(&fuse->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) { - int rev = mx6sabre_rev(); + int rev = nxp_board_rev(); return (get_cpu_rev() & ~(0xF << 8)) | rev; } @@ -703,20 +673,7 @@ int board_late_init(void) int checkboard(void) { - 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); + printf("Board: MX6Q-Sabreauto rev%c\n", nxp_board_rev_string()); return 0; } diff --git a/configs/mx6sabreauto_defconfig b/configs/mx6sabreauto_defconfig index 418a836a7c..215700bc3f 100644 --- a/configs/mx6sabreauto_defconfig +++ b/configs/mx6sabreauto_defconfig @@ -8,6 +8,7 @@ CONFIG_SPL_MMC_SUPPORT=y CONFIG_SPL_SERIAL_SUPPORT=y CONFIG_SPL_LIBDISK_SUPPORT=y CONFIG_SPL_WATCHDOG_SUPPORT=y +CONFIG_NXP_BOARD_REVISION=y CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/mach-imx/spl_sd.cfg" # CONFIG_CONSOLE_MUX is not set CONFIG_SYS_CONSOLE_IS_IN_ENV=y -- 2.39.5