* [U-Boot] [PATCH] i.MX28: Make the stabilization delays shorter
@ 2012-01-31 0:05 Marek Vasut
2012-03-20 7:45 ` Stefano Babic
0 siblings, 1 reply; 2+ messages in thread
From: Marek Vasut @ 2012-01-31 0:05 UTC (permalink / raw)
To: u-boot
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@gmail.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Detlev Zundel <dzu@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Robert Deli?n <robert@delien.nl>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Matthias Fuchs <matthias.fuchs@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
^ permalink raw reply related [flat|nested] 2+ messages in thread* [U-Boot] [PATCH] i.MX28: Make the stabilization delays shorter
2012-01-31 0:05 [U-Boot] [PATCH] i.MX28: Make the stabilization delays shorter Marek Vasut
@ 2012-03-20 7:45 ` Stefano Babic
0 siblings, 0 replies; 2+ messages in thread
From: Stefano Babic @ 2012-03-20 7:45 UTC (permalink / raw)
To: u-boot
On 31/01/2012 01:05, Marek Vasut wrote:
> 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@gmail.com>
> Cc: Wolfgang Denk <wd@denx.de>
> Cc: Detlev Zundel <dzu@denx.de>
> Cc: Stefano Babic <sbabic@denx.de>
> Cc: Robert Deli?n <robert@delien.nl>
> Cc: Fabio Estevam <festevam@gmail.com>
> Cc: Matthias Fuchs <matthias.fuchs@esd.eu>
> ---
Applied to u-boot-imx (fix), thanks.
Best regards,
Stefano Babic
--
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HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: office at denx.de
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