From mboxrd@z Thu Jan 1 00:00:00 1970 From: kernel-TqfNSX0MhmxHKSADF0wUEw@public.gmane.org Subject: [PATCH 2/2] dt/bindings: control CS via standard GPIO operations instead of SPI-HW Date: Wed, 4 Mar 2015 16:40:04 +0000 Message-ID: <1425487205-5477-2-git-send-email-kernel@martin.sperl.org> References: <1425487205-5477-1-git-send-email-kernel@martin.sperl.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1425487205-5477-1-git-send-email-kernel-TqfNSX0MhmxHKSADF0wUEw@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-rpi-kernel" Errors-To: linux-rpi-kernel-bounces+glkr-linux-rpi-kernel=m.gmane.org-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org To: linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-rpi-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org List-Id: devicetree@vger.kernel.org From: Martin Sperl Change the device tree to use cs-gpios for the spi bus master and standard gpio operation instead of relying on the HW with just 2 chip_selects using ALT0. This reassigns the existing CS pins 7(=CS1) and 8(=CS0) as output instead of ALT0 (=SPI HW block controlled) and adds them in the list of cs-gpios for the spi-bus. Signed-off-by: Martin Sperl --- arch/arm/boot/dts/bcm2835-rpi.dtsi | 4 ++-- arch/arm/boot/dts/bcm2835.dtsi | 1 + 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/arm/boot/dts/bcm2835-rpi.dtsi b/arch/arm/boot/dts/bcm2835-rpi.dtsi index c706448..f0e36ab 100644 --- a/arch/arm/boot/dts/bcm2835-rpi.dtsi +++ b/arch/arm/boot/dts/bcm2835-rpi.dtsi @@ -20,12 +20,12 @@ pinctrl-names = "default"; gpioout: gpioout { - brcm,pins = <6>; + brcm,pins = <6 7 8>; brcm,function = <1>; /* GPIO out */ }; alt0: alt0 { - brcm,pins = <0 1 2 3 4 5 7 8 9 10 11 14 15 40 45>; + brcm,pins = <0 1 2 3 4 5 9 10 11 14 15 40 45>; brcm,function = <4>; /* alt0 */ }; diff --git a/arch/arm/boot/dts/bcm2835.dtsi b/arch/arm/boot/dts/bcm2835.dtsi index 3342cb1..74d08e1 100644 --- a/arch/arm/boot/dts/bcm2835.dtsi +++ b/arch/arm/boot/dts/bcm2835.dtsi @@ -110,6 +110,7 @@ #address-cells = <1>; #size-cells = <0>; status = "disabled"; + cs-gpios = <&gpio 8 0>, <&gpio 7 0>; }; i2c0: i2c@20205000 { -- 1.7.10.4