Message ID | 20190529065056.27516-1-Anson.Huang@nxp.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Series | ARM: dts: imx7d-sdb: Make SW2's voltage fixed | expand |
On 29.05.2019 09:49, Anson.Huang@nxp.com wrote: > From: Anson Huang <Anson.Huang@nxp.com> > > On i.MX7D SDB board, SW2 supplies a lot of peripheral devices, > its voltage should be fixed at 1.8V. The commit 43967d9b5a7c > ("ARM: dts: imx7d-sdb: Assign corresponding power supply for LDOs") > assigns SW2 as the supplier of vdd1p0d, and when its comsumers > pcie-phy/mipi-phy try to set the vdd1p0d to 1.0V, regulator core > will also set SW2 to its best(min) voltage to 1.5V, and it will > lead to board reset. > > This patch makes SW2's voltage fixed at 1.8V to avoid this issue. > > Fixes: 43967d9b5a7c ("ARM: dts: imx7d-sdb: Assign corresponding power supply for LDOs") > Reported-by: Leonard Crestez <leonard.crestez@nxp.com> > Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com> Other boards don't seem to be affected by the original series.
On Wed, May 29, 2019 at 02:50:56PM +0800, Anson.Huang@nxp.com wrote: > From: Anson Huang <Anson.Huang@nxp.com> > > On i.MX7D SDB board, SW2 supplies a lot of peripheral devices, > its voltage should be fixed at 1.8V. The commit 43967d9b5a7c > ("ARM: dts: imx7d-sdb: Assign corresponding power supply for LDOs") > assigns SW2 as the supplier of vdd1p0d, and when its comsumers > pcie-phy/mipi-phy try to set the vdd1p0d to 1.0V, regulator core > will also set SW2 to its best(min) voltage to 1.5V, and it will > lead to board reset. > > This patch makes SW2's voltage fixed at 1.8V to avoid this issue. > > Fixes: 43967d9b5a7c ("ARM: dts: imx7d-sdb: Assign corresponding power supply for LDOs") > Reported-by: Leonard Crestez <leonard.crestez@nxp.com> > Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Applied, thanks.
diff --git a/arch/arm/boot/dts/imx7d-sdb.dts b/arch/arm/boot/dts/imx7d-sdb.dts index efc83bc..a5365b8 100644 --- a/arch/arm/boot/dts/imx7d-sdb.dts +++ b/arch/arm/boot/dts/imx7d-sdb.dts @@ -263,8 +263,8 @@ }; sw2_reg: sw2 { - regulator-min-microvolt = <1500000>; - regulator-max-microvolt = <1850000>; + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <1800000>; regulator-boot-on; regulator-always-on; };