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| author |   Codrin Ciubotariu <codrin.ciubotariu@microchip.com> | 2020-06-15 12:55:23 +0300 |
|---|---|---|
| committer |   Alexandre Belloni <alexandre.belloni@bootlin.com> | 2020-06-17 23:24:50 +0200 |
| commit | 07e324d4dfef7b9df22c950055636b9d0b890af4 (patch) | |
| tree | f7be77d348beffcb28e99b8c0daa5df175e61024 /arch/arm/boot/dts/at91-sama5d2_xplained.dts | |
| parent | Linux 5.8-rc1 (diff) | |
| download | wireguard-linux-07e324d4dfef7b9df22c950055636b9d0b890af4.tar.xz wireguard-linux-07e324d4dfef7b9df22c950055636b9d0b890af4.zip | |
ARM: dts: at91: sama5d2_xplained: classd: pull-down the R1 and R3 lines
The R1 and R3 lines drive NMOS transistors that are OFF with a low level.
On the SAMA5D2 Xplained board, if the pins corresponding to R1 and R3
have pull-ups enabled, there is an extra 2 x 30uA power consumption.
Use pull-downs for these 2 lines to remove the unnecessary power
consumption.
Fixes: b133ca7a653c ("ARM: dts: at91: sama5d2_xplained: add pin muxing and enable classd")
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20200615095525.43414-1-codrin.ciubotariu@microchip.com
Diffstat (limited to 'arch/arm/boot/dts/at91-sama5d2_xplained.dts')
| -rw-r--r-- | arch/arm/boot/dts/at91-sama5d2_xplained.dts | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/arch/arm/boot/dts/at91-sama5d2_xplained.dts b/arch/arm/boot/dts/at91-sama5d2_xplained.dts index a927165ea7c2..0e17df568d0b 100644 --- a/arch/arm/boot/dts/at91-sama5d2_xplained.dts +++ b/arch/arm/boot/dts/at91-sama5d2_xplained.dts @@ -490,14 +490,18 @@ bias-pull-up; }; - pinctrl_classd_default: classd_default { + pinctrl_classd_default_pfets: classd_default_pfets { pinmux = <PIN_PB1__CLASSD_R0>, - <PIN_PB2__CLASSD_R1>, - <PIN_PB3__CLASSD_R2>, - <PIN_PB4__CLASSD_R3>; + <PIN_PB3__CLASSD_R2>; bias-pull-up; }; + pinctrl_classd_default_nfets: classd_default_nfets { + pinmux = <PIN_PB2__CLASSD_R1>, + <PIN_PB4__CLASSD_R3>; + bias-pull-down; + }; + pinctrl_flx0_default: flx0_default { pinmux = <PIN_PB28__FLEXCOM0_IO0>, <PIN_PB29__FLEXCOM0_IO1>; @@ -696,7 +700,7 @@ classd: classd@fc048000 { pinctrl-names = "default"; - pinctrl-0 = <&pinctrl_classd_default>; + pinctrl-0 = <&pinctrl_classd_default_pfets &pinctrl_classd_default_nfets>; atmel,pwm-type = "diff"; atmel,non-overlap-time = <10>; status = "okay"; |