According to i.MX23 datasheet Table 32-17, we must wait for the supply to settle before disabling the current limiter. Indeed, not waiting a little here causes the system to crash at times.
Signed-off-by: Marek Vasut <[email protected]> Cc: Stefano Babic <[email protected]> --- arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c b/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c index 3baf4dd..de8841a 100644 --- a/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c +++ b/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c @@ -240,9 +240,14 @@ static void mx23_mem_setup_vddmem(void) struct mxs_power_regs *power_regs = (struct mxs_power_regs *)MXS_POWER_BASE; + /* We must wait before and after disabling the current limiter! */ + early_delay(10000); + clrbits_le32(&power_regs->hw_power_vddmemctrl, POWER_VDDMEMCTRL_ENABLE_ILIMIT); + early_delay(10000); + } static void mx23_mem_init(void) -- 1.9.2 _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
