linux-kernel - [PATCH v3 4/4] ARM: dts: keystone: Add "ti,da830-uart" compatible string

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Message-Id: <1483642460-6891-5-git-send-email-david@lechnology.com>
Date:   Thu,  5 Jan 2017 12:54:20 -0600
From:   David Lechner <david@...hnology.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sekhar Nori <nsekhar@...com>,
        Santosh Shilimkar <ssantosh@...nel.org>
Cc:     David Lechner <david@...hnology.com>,
        Franklin S Cooper Jr <fcooper@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Kevin Hilman <khilman@...nel.org>,
        Axel Haslam <ahaslam@...libre.com>,
        Alexandre Bailon <abailon@...libre.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Jiri Slaby <jslaby@...e.com>, linux-serial@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v3 4/4] ARM: dts: keystone: Add "ti,da830-uart" compatible string

The TI Keystone SoCs have extra UART registers beyond the standard 8250
registers, so we need a new compatible string to indicate this. Also, at
least one of these registers uses the full 32 bits, so we need to specify
reg-io-width in addition to reg-shift.

"ns16550a" is left in the compatible specification since it does work as
long as the bootloader configures the SoC UART power management registers.

Signed-off-by: David Lechner <david@...hnology.com>
---

v3 changes:
* None

v2 changes:
* This is a new patch in v2

 arch/arm/boot/dts/keystone-k2g.dtsi | 2 +-
 arch/arm/boot/dts/keystone-k2l.dtsi | 4 ++--
 arch/arm/boot/dts/keystone.dtsi     | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/arm/boot/dts/keystone-k2g.dtsi b/arch/arm/boot/dts/keystone-k2g.dtsi
index 63c7cf0c..7d7b9a8 100644
--- a/arch/arm/boot/dts/keystone-k2g.dtsi
+++ b/arch/arm/boot/dts/keystone-k2g.dtsi
@@ -90,7 +90,7 @@
 		};
 
 		uart0: serial@...30c00 {
-			compatible = "ns16550a";
+			compatible = "ti,da830-uart", "ns16550a";
 			current-speed = <115200>;
 			reg-shift = <2>;
 			reg-io-width = <4>;
diff --git a/arch/arm/boot/dts/keystone-k2l.dtsi b/arch/arm/boot/dts/keystone-k2l.dtsi
index 0c5e74e..e91633f 100644
--- a/arch/arm/boot/dts/keystone-k2l.dtsi
+++ b/arch/arm/boot/dts/keystone-k2l.dtsi
@@ -35,7 +35,7 @@
 		/include/ "keystone-k2l-clocks.dtsi"
 
 		uart2: serial@...48400 {
-			compatible = "ns16550a";
+			compatible = "ti,da830-uart", "ns16550a";
 			current-speed = <115200>;
 			reg-shift = <2>;
 			reg-io-width = <4>;
@@ -45,7 +45,7 @@
 		};
 
 		uart3:	serial@...48800 {
-			compatible = "ns16550a";
+			compatible = "ti,da830-uart", "ns16550a";
 			current-speed = <115200>;
 			reg-shift = <2>;
 			reg-io-width = <4>;
diff --git a/arch/arm/boot/dts/keystone.dtsi b/arch/arm/boot/dts/keystone.dtsi
index 02708ba..9152610 100644
--- a/arch/arm/boot/dts/keystone.dtsi
+++ b/arch/arm/boot/dts/keystone.dtsi
@@ -98,7 +98,7 @@
 		/include/ "keystone-clocks.dtsi"
 
 		uart0: serial@...30c00 {
-			compatible = "ns16550a";
+			compatible = "ti,da830-uart", "ns16550a";
 			current-speed = <115200>;
 			reg-shift = <2>;
 			reg-io-width = <4>;
@@ -108,7 +108,7 @@
 		};
 
 		uart1:	serial@...31000 {
-			compatible = "ns16550a";
+			compatible = "ti,da830-uart", "ns16550a";
 			current-speed = <115200>;
 			reg-shift = <2>;
 			reg-io-width = <4>;
-- 
2.7.4