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arm: mxs: Wait when disabling VDDMEM current limiter 

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 <marex@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Marek Vasut 2014-04-28 03:38:40 +02:00 committed by Stefano Babic
parent dd24b57bb7
commit be0ecdbed5
1 changed files with 5 additions and 0 deletions
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5
arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c
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@ -240,9 +240,14 @@ static void mx23_mem_setup_vddmem(void)
struct mxs_power_regs *power_regs = struct mxs_power_regs *power_regs =
(struct mxs_power_regs *)MXS_POWER_BASE; (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, clrbits_le32(&power_regs->hw_power_vddmemctrl,
POWER_VDDMEMCTRL_ENABLE_ILIMIT); POWER_VDDMEMCTRL_ENABLE_ILIMIT);
early_delay(10000);
} }
static void mx23_mem_init(void) static void mx23_mem_init(void)