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| author | Tim Harvey <tharvey@gateworks.com> | 2016-05-23 08:25:28 -0700 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2016-05-24 15:01:43 +0200 |
| commit | 3c0fd17f61060f3077b0601e0d8353e2b1b6a3df (patch) | |
| tree | 7b55d74d04d599c5306d021a4cb872111d1e8ab0 /board/gateworks/gw_ventana/gw_ventana_spl.c | |
| parent | a419352daf7a3dd29306d458fd3924e394d3cdc0 (diff) | |
| download | talos-obmc-uboot-3c0fd17f61060f3077b0601e0d8353e2b1b6a3df.tar.gz talos-obmc-uboot-3c0fd17f61060f3077b0601e0d8353e2b1b6a3df.zip | |
imx: ventana: use EEPROM register for falcon boot mode
NAND+MMC env support costs 12KB in the SPL which is fairly expensive just
for the ability to specify whether or not to boot to uboot or directly
to linux. The Ventana boards have plenty of EEPROM storage so we will use
a byte there to signify if we should boot to the bootloader or to the OS.
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Diffstat (limited to 'board/gateworks/gw_ventana/gw_ventana_spl.c')
| -rw-r--r-- | board/gateworks/gw_ventana/gw_ventana_spl.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/board/gateworks/gw_ventana/gw_ventana_spl.c b/board/gateworks/gw_ventana/gw_ventana_spl.c index 0a6ad47c7d..ed42b860aa 100644 --- a/board/gateworks/gw_ventana/gw_ventana_spl.c +++ b/board/gateworks/gw_ventana/gw_ventana_spl.c @@ -15,6 +15,7 @@ #include <asm/imx-common/iomux-v3.h> #include <asm/imx-common/mxc_i2c.h> #include <environment.h> +#include <i2c.h> #include <spl.h> #include "gsc.h" @@ -560,7 +561,7 @@ void spl_board_init(void) /* return 1 if we wish to boot to uboot vs os (falcon mode) */ int spl_start_uboot(void) { - int ret = 1; + unsigned char ret = 1; debug("%s\n", __func__); #ifdef CONFIG_SPL_ENV_SUPPORT @@ -569,6 +570,10 @@ int spl_start_uboot(void) debug("boot_os=%s\n", getenv("boot_os")); if (getenv_yesno("boot_os") == 1) ret = 0; +#else + /* use i2c-0:0x50:0x00 for falcon boot mode (0=linux, else uboot) */ + i2c_set_bus_num(0); + gsc_i2c_read(0x50, 0x0, 1, &ret, 1); #endif debug("%s booting %s\n", __func__, ret ? "uboot" : "linux"); return ret; |
