[U-Boot] [PATCH] i.MX28: Make the stabilization delays shorter
Marek Vasut
marek.vasut at gmail.com
Tue Jan 31 01:05:39 CET 2012
Cut down the VDDIO/VDDA regulator stabilization delays to 500 uS. That should be
enough according to the datasheet and bootlets.
Signed-off-by: Marek Vasut <marek.vasut at gmail.com>
Cc: Wolfgang Denk <wd at denx.de>
Cc: Detlev Zundel <dzu at denx.de>
Cc: Stefano Babic <sbabic at denx.de>
Cc: Robert Deliën <robert at delien.nl>
Cc: Fabio Estevam <festevam at gmail.com>
Cc: Matthias Fuchs <matthias.fuchs at esd.eu>
---
arch/arm/cpu/arm926ejs/mx28/spl_power_init.c | 8 ++++----
1 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/arm/cpu/arm926ejs/mx28/spl_power_init.c b/arch/arm/cpu/arm926ejs/mx28/spl_power_init.c
index c6c25d9..4b09b0c 100644
--- a/arch/arm/cpu/arm926ejs/mx28/spl_power_init.c
+++ b/arch/arm/cpu/arm926ejs/mx28/spl_power_init.c
@@ -805,7 +805,7 @@ void mx28_power_set_vddio(uint32_t new_target, uint32_t new_brownout)
if (powered_by_linreg ||
(readl(&power_regs->hw_power_sts) &
POWER_STS_VDD5V_GT_VDDIO))
- early_delay(1500);
+ early_delay(500);
else {
while (!(readl(&power_regs->hw_power_sts) &
POWER_STS_DC_OK))
@@ -842,7 +842,7 @@ void mx28_power_set_vddio(uint32_t new_target, uint32_t new_brownout)
if (powered_by_linreg ||
(readl(&power_regs->hw_power_sts) &
POWER_STS_VDD5V_GT_VDDIO))
- early_delay(1500);
+ early_delay(500);
else {
while (!(readl(&power_regs->hw_power_sts) &
POWER_STS_DC_OK))
@@ -902,7 +902,7 @@ void mx28_power_set_vddd(uint32_t new_target, uint32_t new_brownout)
if (powered_by_linreg ||
(readl(&power_regs->hw_power_sts) &
POWER_STS_VDD5V_GT_VDDIO))
- early_delay(1500);
+ early_delay(500);
else {
while (!(readl(&power_regs->hw_power_sts) &
POWER_STS_DC_OK))
@@ -939,7 +939,7 @@ void mx28_power_set_vddd(uint32_t new_target, uint32_t new_brownout)
if (powered_by_linreg ||
(readl(&power_regs->hw_power_sts) &
POWER_STS_VDD5V_GT_VDDIO))
- early_delay(1500);
+ early_delay(500);
else {
while (!(readl(&power_regs->hw_power_sts) &
POWER_STS_DC_OK))
--
1.7.8.3
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