[U-Boot] [PATCH] sunxi: set the default CPUx frequency of H5 to 816MHz
Some H5 boards are designed to start at 1.1V CPUx voltage (e.g. Nano Pi NEO2), which may not work properly at 1008MHz if the chip's quality is not so good.
Lower the default CPUx frequency of H5 to 816MHz.
Signed-off-by: Icenowy Zheng icenowy@aosc.io --- arch/arm/mach-sunxi/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig index 09cfec6f57..1fededd0a3 100644 --- a/arch/arm/mach-sunxi/Kconfig +++ b/arch/arm/mach-sunxi/Kconfig @@ -397,9 +397,9 @@ config SYS_CLK_FREQ default 1008000000 if MACH_SUN5I default 1008000000 if MACH_SUN6I default 912000000 if MACH_SUN7I + default 816000000 if MACH_SUN50I || MACH_SUN50I_H5 default 1008000000 if MACH_SUN8I default 1008000000 if MACH_SUN9I - default 816000000 if MACH_SUN50I
config SYS_CONFIG_NAME default "sun4i" if MACH_SUN4I
On Tue, Oct 31, 2017 at 5:06 AM, Icenowy Zheng icenowy@aosc.io wrote:
Some H5 boards are designed to start at 1.1V CPUx voltage (e.g. Nano Pi NEO2), which may not work properly at 1008MHz if the chip's quality is not so good.
Lower the default CPUx frequency of H5 to 816MHz.
Signed-off-by: Icenowy Zheng icenowy@aosc.io
arch/arm/mach-sunxi/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig index 09cfec6f57..1fededd0a3 100644 --- a/arch/arm/mach-sunxi/Kconfig +++ b/arch/arm/mach-sunxi/Kconfig @@ -397,9 +397,9 @@ config SYS_CLK_FREQ default 1008000000 if MACH_SUN5I default 1008000000 if MACH_SUN6I default 912000000 if MACH_SUN7I
default 816000000 if MACH_SUN50I || MACH_SUN50I_H5 default 1008000000 if MACH_SUN8I
Even orangepi pc2 has 1.1v after power-on and it's work fine [1] did you find an issue with neo2?
[1] http://linux-sunxi.org/Xunlong_Orange_Pi_PC_2#CPU_clock_speed_limit
thanks!
在 2017-10-31 15:57，Jagan Teki 写道：
On Tue, Oct 31, 2017 at 5:06 AM, Icenowy Zheng icenowy@aosc.io wrote:
Some H5 boards are designed to start at 1.1V CPUx voltage (e.g. Nano Pi NEO2), which may not work properly at 1008MHz if the chip's quality is not so good.
Lower the default CPUx frequency of H5 to 816MHz.
Signed-off-by: Icenowy Zheng icenowy@aosc.io
arch/arm/mach-sunxi/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig index 09cfec6f57..1fededd0a3 100644 --- a/arch/arm/mach-sunxi/Kconfig +++ b/arch/arm/mach-sunxi/Kconfig @@ -397,9 +397,9 @@ config SYS_CLK_FREQ default 1008000000 if MACH_SUN5I default 1008000000 if MACH_SUN6I default 912000000 if MACH_SUN7I
default 816000000 if MACH_SUN50I || MACH_SUN50I_H5 default 1008000000 if MACH_SUN8IEven orangepi pc2 has 1.1v after power-on and it's work fine [1] did you find an issue with neo2?
Yes, the boot process randomly hang at SPL stage -- but when it enters ATF it will run smoothly as the ATF will re-configure CPUx frequency to 816MHz.
According to the official operating point table [2], 1008MHz is bound to 1.2V, and 816MHz is bound to 1.1V.
Allwinner chips usually have not-so-good quality control to reach the low price, and different chips may work differently in situations that is beyond the official the OPP table.
[2] https://github.com/OrangePiLibra/OrangePi_H5SDK/blob/master/external/sys_con...
[1] http://linux-sunxi.org/Xunlong_Orange_Pi_PC_2#CPU_clock_speed_limit
thanks!
On Tue, Oct 31, 2017 at 1:35 PM, icenowy@aosc.io wrote:
在 2017-10-31 15:57，Jagan Teki 写道：
On Tue, Oct 31, 2017 at 5:06 AM, Icenowy Zheng icenowy@aosc.io wrote:
Some H5 boards are designed to start at 1.1V CPUx voltage (e.g. Nano Pi NEO2), which may not work properly at 1008MHz if the chip's quality is not so good.
Lower the default CPUx frequency of H5 to 816MHz.
Signed-off-by: Icenowy Zheng icenowy@aosc.io
arch/arm/mach-sunxi/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig index 09cfec6f57..1fededd0a3 100644 --- a/arch/arm/mach-sunxi/Kconfig +++ b/arch/arm/mach-sunxi/Kconfig @@ -397,9 +397,9 @@ config SYS_CLK_FREQ default 1008000000 if MACH_SUN5I default 1008000000 if MACH_SUN6I default 912000000 if MACH_SUN7I
default 816000000 if MACH_SUN50I || MACH_SUN50I_H5 default 1008000000 if MACH_SUN8IEven orangepi pc2 has 1.1v after power-on and it's work fine [1] did you find an issue with neo2?
Yes, the boot process randomly hang at SPL stage -- but when it enters ATF it will run smoothly as the ATF will re-configure CPUx frequency to 816MHz.
OK, Linux has similar issue, I will check it meanwhile.
According to the official operating point table [2], 1008MHz is bound to 1.2V, and 816MHz is bound to 1.1V.
Does this common for all H5 SDK or orangepi design?
thanks!
于 2017年10月31日 GMT+08:00 下午4:53:57, Jagan Teki jagannadh.teki@gmail.com 写到:
On Tue, Oct 31, 2017 at 1:35 PM, icenowy@aosc.io wrote:
在 2017-10-31 15:57，Jagan Teki 写道：
On Tue, Oct 31, 2017 at 5:06 AM, Icenowy Zheng icenowy@aosc.io
wrote:
Some H5 boards are designed to start at 1.1V CPUx voltage (e.g.
Nano Pi
NEO2), which may not work properly at 1008MHz if the chip's quality
is
not so good.
Lower the default CPUx frequency of H5 to 816MHz.
Signed-off-by: Icenowy Zheng icenowy@aosc.io
arch/arm/mach-sunxi/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mach-sunxi/Kconfig
b/arch/arm/mach-sunxi/Kconfig
index 09cfec6f57..1fededd0a3 100644 --- a/arch/arm/mach-sunxi/Kconfig +++ b/arch/arm/mach-sunxi/Kconfig @@ -397,9 +397,9 @@ config SYS_CLK_FREQ default 1008000000 if MACH_SUN5I default 1008000000 if MACH_SUN6I default 912000000 if MACH_SUN7I
default 816000000 if MACH_SUN50I || MACH_SUN50I_H5 default 1008000000 if MACH_SUN8IEven orangepi pc2 has 1.1v after power-on and it's work fine [1] did you find an issue with neo2?
Yes, the boot process randomly hang at SPL stage -- but when it
enters
ATF it will run smoothly as the ATF will re-configure CPUx frequency to 816MHz.
OK, Linux has similar issue, I will check it meanwhile.
According to the official operating point table [2], 1008MHz is bound to 1.2V, and 816MHz is bound to 1.1V.
Does this common for all H5 SDK or orangepi design?
For all H5 SDK. It's the original comment in H5 SDK from AW.
thanks!
On Tue, Oct 31, 2017 at 04:05:36PM +0800, icenowy@aosc.io wrote:
在 2017-10-31 15:57，Jagan Teki 写道：
On Tue, Oct 31, 2017 at 5:06 AM, Icenowy Zheng icenowy@aosc.io wrote:
Some H5 boards are designed to start at 1.1V CPUx voltage (e.g. Nano Pi NEO2), which may not work properly at 1008MHz if the chip's quality is not so good.
Lower the default CPUx frequency of H5 to 816MHz.
Signed-off-by: Icenowy Zheng icenowy@aosc.io
arch/arm/mach-sunxi/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig index 09cfec6f57..1fededd0a3 100644 --- a/arch/arm/mach-sunxi/Kconfig +++ b/arch/arm/mach-sunxi/Kconfig @@ -397,9 +397,9 @@ config SYS_CLK_FREQ default 1008000000 if MACH_SUN5I default 1008000000 if MACH_SUN6I default 912000000 if MACH_SUN7I
default 816000000 if MACH_SUN50I || MACH_SUN50I_H5 default 1008000000 if MACH_SUN8IEven orangepi pc2 has 1.1v after power-on and it's work fine [1] did you find an issue with neo2?
So you have one single model that fails, and you change the default frequency of all the boards using that SoC?
It seems a bit overkill.
I guess we have two solutions: 1) Change the frequency in that board config 2) Change the voltage in that board config
There's no need to enforce a SoC-wide change.
Maxime
在 2017-10-31 21:54，Maxime Ripard 写道：
On Tue, Oct 31, 2017 at 04:05:36PM +0800, icenowy@aosc.io wrote:
在 2017-10-31 15:57，Jagan Teki 写道：
On Tue, Oct 31, 2017 at 5:06 AM, Icenowy Zheng icenowy@aosc.io wrote:
Some H5 boards are designed to start at 1.1V CPUx voltage (e.g. Nano Pi NEO2), which may not work properly at 1008MHz if the chip's quality is not so good.
Lower the default CPUx frequency of H5 to 816MHz.
Signed-off-by: Icenowy Zheng icenowy@aosc.io
arch/arm/mach-sunxi/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig index 09cfec6f57..1fededd0a3 100644 --- a/arch/arm/mach-sunxi/Kconfig +++ b/arch/arm/mach-sunxi/Kconfig @@ -397,9 +397,9 @@ config SYS_CLK_FREQ default 1008000000 if MACH_SUN5I default 1008000000 if MACH_SUN6I default 912000000 if MACH_SUN7I
default 816000000 if MACH_SUN50I || MACH_SUN50I_H5 default 1008000000 if MACH_SUN8IEven orangepi pc2 has 1.1v after power-on and it's work fine [1] did you find an issue with neo2?
So you have one single model that fails, and you change the default frequency of all the boards using that SoC?
But I think we have already set the default frequency to 816MHz for A64, and it seems that several H5 boards are designed to start at 1.1v (see the notes by Jagan above).
It seems a bit overkill.
I guess we have two solutions:
- Change the frequency in that board config
- Change the voltage in that board config
NEO2 don't have any voltage adjusting, it's fixed at 1.1V.
And according to the Orange Pi PC2 and Prime schematics, they both start at 1.1V. (The Prime schematics even says "For H5 adjust VDD-CPUX to 1.1V).
There's no need to enforce a SoC-wide change.
Maxime
Hi,
Icenowy Zheng píše v St 01. 11. 2017 v 08:31 +0800:
And according to the Orange Pi PC2 and Prime schematics, they both start at 1.1V. (The Prime schematics even says "For H5 adjust VDD-CPUX to 1.1V).
Orange Pi PC2 starts at the same voltage as Orange Pi PC. That is at 1.308V.
It can be calculated from 0.6×(1+11.8÷10) as per the values of Ru1/Ru2 resistors in the schema. It is also my experience of working with these boards and writing the sy8106a driver.
regards, Ondrej
There's no need to enforce a SoC-wide change.
Maxime
'Ondřej Jirman' via linux-sunxi píše v St 01. 11. 2017 v 03:10 +0100:
Hi,
Icenowy Zheng píše v St 01. 11. 2017 v 08:31 +0800:
And according to the Orange Pi PC2 and Prime schematics, they both start at 1.1V. (The Prime schematics even says "For H5 adjust VDD-CPUX to 1.1V).
Orange Pi PC2 starts at the same voltage as Orange Pi PC. That is at 1.308V.
It can be calculated from 0.6×(1+11.8÷10) as per the values of Ru1/Ru2 resistors in the schema. It is also my experience of working with these boards and writing the sy8106a driver.
Anyway, I may be mis-remembering in the case of PC2. So please ignore me. :) I'm only sure in the case of Orange Pi PC, which is not relevant here. Sorry.
regards, Ondrej
There's no need to enforce a SoC-wide change.
Maxime
On Wed, Nov 1, 2017 at 7:40 AM, Ondřej Jirman megi@xff.cz wrote:
Hi,
Icenowy Zheng píše v St 01. 11. 2017 v 08:31 +0800:
And according to the Orange Pi PC2 and Prime schematics, they both start at 1.1V. (The Prime schematics even says "For H5 adjust VDD-CPUX to 1.1V).
Orange Pi PC2 starts at the same voltage as Orange Pi PC. That is at 1.308V.
It can be calculated from 0.6×(1+11.8÷10) as per the values of Ru1/Ru2 resistors in the schema. It is also my experience of working with these boards and writing the sy8106a driver.
I think you reverse the Ru values according to pc2 and prime schematic CPUX Vout = 0.6x(1+Ru1/Ru2)
so Ru1 10K and Ru2 11.8K then Vout = 0.6x(1+10/11.8) => 1.10V
thanks!
On Wed, Nov 01, 2017 at 08:31:46AM +0800, Icenowy Zheng wrote:
在 2017-10-31 21:54，Maxime Ripard 写道：
On Tue, Oct 31, 2017 at 04:05:36PM +0800, icenowy@aosc.io wrote:
在 2017-10-31 15:57，Jagan Teki 写道：
On Tue, Oct 31, 2017 at 5:06 AM, Icenowy Zheng icenowy@aosc.io wrote:
Some H5 boards are designed to start at 1.1V CPUx voltage (e.g. Nano Pi NEO2), which may not work properly at 1008MHz if the chip's quality is not so good.
Lower the default CPUx frequency of H5 to 816MHz.
Signed-off-by: Icenowy Zheng icenowy@aosc.io
arch/arm/mach-sunxi/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig index 09cfec6f57..1fededd0a3 100644 --- a/arch/arm/mach-sunxi/Kconfig +++ b/arch/arm/mach-sunxi/Kconfig @@ -397,9 +397,9 @@ config SYS_CLK_FREQ default 1008000000 if MACH_SUN5I default 1008000000 if MACH_SUN6I default 912000000 if MACH_SUN7I
default 816000000 if MACH_SUN50I || MACH_SUN50I_H5 default 1008000000 if MACH_SUN8IEven orangepi pc2 has 1.1v after power-on and it's work fine [1] did you find an issue with neo2?
So you have one single model that fails, and you change the default frequency of all the boards using that SoC?
But I think we have already set the default frequency to 816MHz for A64, and it seems that several H5 boards are designed to start at 1.1v (see the notes by Jagan above).
It seems a bit overkill.
I guess we have two solutions:
- Change the frequency in that board config
- Change the voltage in that board config
NEO2 don't have any voltage adjusting, it's fixed at 1.1V.
And according to the Orange Pi PC2 and Prime schematics, they both start at 1.1V. (The Prime schematics even says "For H5 adjust VDD-CPUX to 1.1V).
And what about the Zero Plus 2 ?
Maxime
On Thu, Nov 2, 2017 at 7:26 PM, Maxime Ripard maxime.ripard@free-electrons.com wrote:
On Wed, Nov 01, 2017 at 08:31:46AM +0800, Icenowy Zheng wrote:
在 2017-10-31 21:54，Maxime Ripard 写道：
On Tue, Oct 31, 2017 at 04:05:36PM +0800, icenowy@aosc.io wrote:
在 2017-10-31 15:57，Jagan Teki 写道：
On Tue, Oct 31, 2017 at 5:06 AM, Icenowy Zheng icenowy@aosc.io wrote:
Some H5 boards are designed to start at 1.1V CPUx voltage (e.g. Nano Pi NEO2), which may not work properly at 1008MHz if the chip's quality is not so good.
Lower the default CPUx frequency of H5 to 816MHz.
Signed-off-by: Icenowy Zheng icenowy@aosc.io
arch/arm/mach-sunxi/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig index 09cfec6f57..1fededd0a3 100644 --- a/arch/arm/mach-sunxi/Kconfig +++ b/arch/arm/mach-sunxi/Kconfig @@ -397,9 +397,9 @@ config SYS_CLK_FREQ default 1008000000 if MACH_SUN5I default 1008000000 if MACH_SUN6I default 912000000 if MACH_SUN7I
default 816000000 if MACH_SUN50I || MACH_SUN50I_H5 default 1008000000 if MACH_SUN8IEven orangepi pc2 has 1.1v after power-on and it's work fine [1] did you find an issue with neo2?
So you have one single model that fails, and you change the default frequency of all the boards using that SoC?
But I think we have already set the default frequency to 816MHz for A64, and it seems that several H5 boards are designed to start at 1.1v (see the notes by Jagan above).
It seems a bit overkill.
I guess we have two solutions:
- Change the frequency in that board config
- Change the voltage in that board config
NEO2 don't have any voltage adjusting, it's fixed at 1.1V.
And according to the Orange Pi PC2 and Prime schematics, they both start at 1.1V. (The Prime schematics even says "For H5 adjust VDD-CPUX to 1.1V).
And what about the Zero Plus 2 ?
Same equation with same reg values, but missing reg names on specific register area Page 7 [4] but hope both were same.
[4] http://linux-sunxi.org/images/f/f6/ORANGE_PI-ZERO-PLUS2_V1_0.pdf
thanks!
On Fri, Nov 03, 2017 at 02:21:51PM +0530, Jagan Teki wrote:
On Thu, Nov 2, 2017 at 7:26 PM, Maxime Ripard maxime.ripard@free-electrons.com wrote:
On Wed, Nov 01, 2017 at 08:31:46AM +0800, Icenowy Zheng wrote:
在 2017-10-31 21:54，Maxime Ripard 写道：
On Tue, Oct 31, 2017 at 04:05:36PM +0800, icenowy@aosc.io wrote:
在 2017-10-31 15:57，Jagan Teki 写道：
On Tue, Oct 31, 2017 at 5:06 AM, Icenowy Zheng icenowy@aosc.io wrote: > Some H5 boards are designed to start at 1.1V CPUx voltage (e.g. Nano > Pi > NEO2), which may not work properly at 1008MHz if the chip's quality is > not so good. > > Lower the default CPUx frequency of H5 to 816MHz. > > Signed-off-by: Icenowy Zheng icenowy@aosc.io > --- > arch/arm/mach-sunxi/Kconfig | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig > index 09cfec6f57..1fededd0a3 100644 > --- a/arch/arm/mach-sunxi/Kconfig > +++ b/arch/arm/mach-sunxi/Kconfig > @@ -397,9 +397,9 @@ config SYS_CLK_FREQ > default 1008000000 if MACH_SUN5I > default 1008000000 if MACH_SUN6I > default 912000000 if MACH_SUN7I > + default 816000000 if MACH_SUN50I || MACH_SUN50I_H5 > default 1008000000 if MACH_SUN8I
Even orangepi pc2 has 1.1v after power-on and it's work fine [1] did you find an issue with neo2?
So you have one single model that fails, and you change the default frequency of all the boards using that SoC?
But I think we have already set the default frequency to 816MHz for A64, and it seems that several H5 boards are designed to start at 1.1v (see the notes by Jagan above).
It seems a bit overkill.
I guess we have two solutions:
- Change the frequency in that board config
- Change the voltage in that board config
NEO2 don't have any voltage adjusting, it's fixed at 1.1V.
And according to the Orange Pi PC2 and Prime schematics, they both start at 1.1V. (The Prime schematics even says "For H5 adjust VDD-CPUX to 1.1V).
And what about the Zero Plus 2 ?
Same equation with same reg values, but missing reg names on specific register area Page 7 [4] but hope both were same.
Ok, so it's not some H5 boards, it's all of them. It makes sense then, once the commit log has been changed.
Maxime
On Fri, Nov 3, 2017 at 10:00 PM, Maxime Ripard maxime.ripard@free-electrons.com wrote:
On Fri, Nov 03, 2017 at 02:21:51PM +0530, Jagan Teki wrote:
On Thu, Nov 2, 2017 at 7:26 PM, Maxime Ripard maxime.ripard@free-electrons.com wrote:
On Wed, Nov 01, 2017 at 08:31:46AM +0800, Icenowy Zheng wrote:
在 2017-10-31 21:54，Maxime Ripard 写道：
On Tue, Oct 31, 2017 at 04:05:36PM +0800, icenowy@aosc.io wrote:
在 2017-10-31 15:57，Jagan Teki 写道： > On Tue, Oct 31, 2017 at 5:06 AM, Icenowy Zheng icenowy@aosc.io wrote: > > Some H5 boards are designed to start at 1.1V CPUx voltage (e.g. Nano > > Pi > > NEO2), which may not work properly at 1008MHz if the chip's quality is > > not so good. > > > > Lower the default CPUx frequency of H5 to 816MHz. > > > > Signed-off-by: Icenowy Zheng icenowy@aosc.io > > --- > > arch/arm/mach-sunxi/Kconfig | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig > > index 09cfec6f57..1fededd0a3 100644 > > --- a/arch/arm/mach-sunxi/Kconfig > > +++ b/arch/arm/mach-sunxi/Kconfig > > @@ -397,9 +397,9 @@ config SYS_CLK_FREQ > > default 1008000000 if MACH_SUN5I > > default 1008000000 if MACH_SUN6I > > default 912000000 if MACH_SUN7I > > + default 816000000 if MACH_SUN50I || MACH_SUN50I_H5 > > default 1008000000 if MACH_SUN8I > > Even orangepi pc2 has 1.1v after power-on and it's work fine [1] did > you find an issue with neo2?
So you have one single model that fails, and you change the default frequency of all the boards using that SoC?
But I think we have already set the default frequency to 816MHz for A64, and it seems that several H5 boards are designed to start at 1.1v (see the notes by Jagan above).
It seems a bit overkill.
I guess we have two solutions:
- Change the frequency in that board config
- Change the voltage in that board config
NEO2 don't have any voltage adjusting, it's fixed at 1.1V.
And according to the Orange Pi PC2 and Prime schematics, they both start at 1.1V. (The Prime schematics even says "For H5 adjust VDD-CPUX to 1.1V).
And what about the Zero Plus 2 ?
Same equation with same reg values, but missing reg names on specific register area Page 7 [4] but hope both were same.
Ok, so it's not some H5 boards, it's all of them. It makes sense then, once the commit log has been changed.
Let me test and will apply all fine.
thanks!
On Mon, Nov 6, 2017 at 1:40 PM, Jagan Teki jagannadh.teki@gmail.com wrote:
On Fri, Nov 3, 2017 at 10:00 PM, Maxime Ripard maxime.ripard@free-electrons.com wrote:
On Fri, Nov 03, 2017 at 02:21:51PM +0530, Jagan Teki wrote:
On Thu, Nov 2, 2017 at 7:26 PM, Maxime Ripard maxime.ripard@free-electrons.com wrote:
On Wed, Nov 01, 2017 at 08:31:46AM +0800, Icenowy Zheng wrote:
在 2017-10-31 21:54，Maxime Ripard 写道：
On Tue, Oct 31, 2017 at 04:05:36PM +0800, icenowy@aosc.io wrote: > 在 2017-10-31 15:57，Jagan Teki 写道： > > On Tue, Oct 31, 2017 at 5:06 AM, Icenowy Zheng icenowy@aosc.io wrote: > > > Some H5 boards are designed to start at 1.1V CPUx voltage (e.g. Nano > > > Pi > > > NEO2), which may not work properly at 1008MHz if the chip's quality is > > > not so good. > > > > > > Lower the default CPUx frequency of H5 to 816MHz. > > > > > > Signed-off-by: Icenowy Zheng icenowy@aosc.io > > > --- > > > arch/arm/mach-sunxi/Kconfig | 2 +- > > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > > > diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig > > > index 09cfec6f57..1fededd0a3 100644 > > > --- a/arch/arm/mach-sunxi/Kconfig > > > +++ b/arch/arm/mach-sunxi/Kconfig > > > @@ -397,9 +397,9 @@ config SYS_CLK_FREQ > > > default 1008000000 if MACH_SUN5I > > > default 1008000000 if MACH_SUN6I > > > default 912000000 if MACH_SUN7I > > > + default 816000000 if MACH_SUN50I || MACH_SUN50I_H5 > > > default 1008000000 if MACH_SUN8I
Applied to u-boot-sunxi/master
participants (6)
-
Icenowy Zheng -
icenowy＠aosc.io
-
Jagan Teki -
Maxime Ripard -
Ondřej Jirman -
Ondřej Jirman