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| author | Marek Vasut <marex@denx.de> | 2014-04-28 03:38:40 +0200 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2014-09-29 09:02:16 +0200 |
| commit | be0ecdbed5efc7833275701ebdb1ff8ef7ffd4c0 (patch) | |
| tree | d0de40a86d17fa43e9d4f74658110e0cf534c4eb /arch/arm/cpu/arm926ejs | |
| parent | dd24b57bb78422eba6780f0b6cc4c0b049a82371 (diff) | |
| download | u-boot-imx-be0ecdbed5efc7833275701ebdb1ff8ef7ffd4c0.zip u-boot-imx-be0ecdbed5efc7833275701ebdb1ff8ef7ffd4c0.tar.gz u-boot-imx-be0ecdbed5efc7833275701ebdb1ff8ef7ffd4c0.tar.bz2 | |
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>
Diffstat (limited to 'arch/arm/cpu/arm926ejs')
| -rw-r--r-- | arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c | 5 |
1 files changed, 5 insertions, 0 deletions
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) |