* [PATCH] ARM: dts: imx6sx-sdb: Add 198MHz operational point
@ 2016-04-29 2:34 Fabio Estevam
2016-05-03 8:37 ` Shawn Guo
0 siblings, 1 reply; 2+ messages in thread
From: Fabio Estevam @ 2016-04-29 2:34 UTC (permalink / raw)
To: linux-arm-kernel
From: Fabio Estevam <fabio.estevam@nxp.com>
imx6sx-sdb has custom operating points entries because it has one
power supply that drives both VDDARM_IN and VDDSOC_IN.
As per the MX6UL datasheet we have the following minimum voltages for
198 MHz operation (after adding the 25mV margin value):
VDDARM_IN = 0.975 V
VDDSOC_IN = 1.175 V
So use 1.175V for the 198MHz operation.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
---
arch/arm/boot/dts/imx6sx-sdb.dts | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm/boot/dts/imx6sx-sdb.dts b/arch/arm/boot/dts/imx6sx-sdb.dts
index 0ad164a..5bb8fd5 100644
--- a/arch/arm/boot/dts/imx6sx-sdb.dts
+++ b/arch/arm/boot/dts/imx6sx-sdb.dts
@@ -18,12 +18,14 @@
996000 1250000
792000 1175000
396000 1175000
+ 198000 1175000
>;
fsl,soc-operating-points = <
/* ARM kHz SOC uV */
996000 1250000
792000 1175000
396000 1175000
+ 198000 1175000
>;
};
--
1.9.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [PATCH] ARM: dts: imx6sx-sdb: Add 198MHz operational point
2016-04-29 2:34 [PATCH] ARM: dts: imx6sx-sdb: Add 198MHz operational point Fabio Estevam
@ 2016-05-03 8:37 ` Shawn Guo
0 siblings, 0 replies; 2+ messages in thread
From: Shawn Guo @ 2016-05-03 8:37 UTC (permalink / raw)
To: linux-arm-kernel
On Thu, Apr 28, 2016 at 11:34:27PM -0300, Fabio Estevam wrote:
> From: Fabio Estevam <fabio.estevam@nxp.com>
>
> imx6sx-sdb has custom operating points entries because it has one
> power supply that drives both VDDARM_IN and VDDSOC_IN.
>
> As per the MX6UL datasheet we have the following minimum voltages for
> 198 MHz operation (after adding the 25mV margin value):
> VDDARM_IN = 0.975 V
> VDDSOC_IN = 1.175 V
>
> So use 1.175V for the 198MHz operation.
>
> Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Applied, thanks.
^ permalink raw reply [flat|nested] 2+ messages in thread
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