linux-kernel - [PATCH 1/3] Documentation: dt: keystone: provide SoC specific compatible flags

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Date:	Tue, 22 Sep 2015 11:08:36 -0500
From:	Nishanth Menon <nm@...com>
To:	Santosh Shilimkar <ssantosh@...nel.org>
CC:	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, Nishanth Menon <nm@...com>
Subject: [PATCH 1/3] Documentation: dt: keystone: provide SoC specific compatible flags

Keystone2 devices are used on more platforms than just Texas
Instruments reference evaluation platforms called EVMs. Providing a
generic compatible "ti,keystone" is not sufficient to differentiate
various SoC definitions possible on various platforms. So, provide
compatible matches for each SoC family by itself.

This allows SoC specific logic to be run time handled based on
of_machine_is_compatible("ti,k2hk") or as needed for the dependent
processor instead of needing to use board dependent compatibles that
are needed now.

Signed-off-by: Nishanth Menon <nm@...com>
---
 .../devicetree/bindings/arm/keystone/keystone.txt    | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/arm/keystone/keystone.txt b/Documentation/devicetree/bindings/arm/keystone/keystone.txt
index 59d7a46f85eb..800d2d02e27b 100644
--- a/Documentation/devicetree/bindings/arm/keystone/keystone.txt
+++ b/Documentation/devicetree/bindings/arm/keystone/keystone.txt
@@ -9,12 +9,26 @@ Required properties:
    the form "ti,keystone-*". Generic devices like gic, arch_timers, ns16550
    type UART should use the specified compatible for those devices.
 
+SoC families:
+
+- Keystone 2 generic SoC:
+   compatible = "ti,keystone"
+
+SoCs:
+
+- Keystone 2 Hawking/Kepler
+   compatible = ti,k2hk", "ti,keystone"
+- Keystone 2 Lamarr
+   compatible = ti,k2l", "ti,keystone"
+- Keystone 2 Edison
+   compatible = ti,k2e", "ti,keystone"
+
 Boards:
 -  Keystone 2 Hawking/Kepler EVM
-   compatible = "ti,k2hk-evm","ti,keystone"
+   compatible = "ti,k2hk-evm", "ti,k2hk", "ti,keystone"
 
 -  Keystone 2 Lamarr EVM
-   compatible = "ti,k2l-evm","ti,keystone"
+   compatible = "ti,k2l-evm", "ti, k2l", "ti,keystone"
 
 -  Keystone 2 Edison EVM
-   compatible = "ti,k2e-evm","ti,keystone"
+   compatible = "ti,k2e-evm", "ti,k2e", "ti,keystone"
-- 
2.1.4

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