From mboxrd@z Thu Jan 1 00:00:00 1970 From: swarren@wwwdotorg.org (Stephen Warren) Date: Wed, 25 Jul 2012 14:02:44 -0600 Subject: [PATCH 2/2] ARM: dt: tegra trimslice: add vbus-gpio property In-Reply-To: <1343246564-21527-1-git-send-email-swarren@wwwdotorg.org> References: <1343246564-21527-1-git-send-email-swarren@wwwdotorg.org> Message-ID: <1343246564-21527-2-git-send-email-swarren@wwwdotorg.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Stephen Warren On TrimSlice, Tegra's USB1 port may be routed to either an external micro USB port, or an internal USB->SATA bridge for SSD or HDD. This muxing is controlled by a GPIO. Whilst not strictly a VBUS GPIO, the TrimSlice board files caused this GPIO to be set appropriately to enable the SATA bridge by passing it as the VBUS GPIO to the USB driver. Echo this same configuration in device tree to enable the SATA bridge. An alternative might be to implement a full USB bus mux driver. However, that seems over-complex right now. Cc: # v3.5 (file is named tegra-trimslice.dts there) Signed-off-by: Stephen Warren --- arch/arm/boot/dts/tegra20-trimslice.dts | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/arch/arm/boot/dts/tegra20-trimslice.dts b/arch/arm/boot/dts/tegra20-trimslice.dts index 84a9523..27fb8a6 100644 --- a/arch/arm/boot/dts/tegra20-trimslice.dts +++ b/arch/arm/boot/dts/tegra20-trimslice.dts @@ -276,6 +276,7 @@ usb at c5000000 { status = "okay"; + nvidia,vbus-gpio = <&gpio 170 0>; /* gpio PV2 */ }; usb at c5004000 { -- 1.7.0.4