linux-kernel - [PATCH v3 05/21] ARM: dts: at91: Add generic compatible string for I2C EEPROM

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Message-Id: <20170414010445.21727-6-javier@osg.samsung.com>
Date:   Thu, 13 Apr 2017 22:04:29 -0300
From:   Javier Martinez Canillas <javier@....samsung.com>
To:     linux-kernel@...r.kernel.org
Cc:     Wolfram Sang <wsa@...-dreams.de>,
        Javier Martinez Canillas <javier@....samsung.com>,
        devicetree@...r.kernel.org, Russell King <linux@...linux.org.uk>,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
        Rob Herring <robh+dt@...nel.org>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Peter Rosin <peda@...ntia.se>,
        Mark Rutland <mark.rutland@....com>,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v3 05/21] ARM: dts: at91: Add generic compatible string for I2C EEPROM

The at24 driver allows to register I2C EEPROM chips using different vendor
and devices, but the I2C subsystem does not take the vendor into account
when matching using the I2C table since it only has device entries.

But when matching using an OF table, both the vendor and device has to be
taken into account so the driver defines only a set of compatible strings
using the "atmel" vendor as a generic fallback for compatible I2C devices.

So add this generic fallback to the device node compatible string to make
the device to match the driver using the OF device ID table.

Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
Acked-by: Peter Rosin <peda@...ntia.se>

---

Changes in v3:
- Add Peter Rosin acked-by tag.

Changes in v2: None

 arch/arm/boot/dts/at91-linea.dtsi   | 2 +-
 arch/arm/boot/dts/at91-tse850-3.dts | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/at91-linea.dtsi b/arch/arm/boot/dts/at91-linea.dtsi
index 0721c8472509..9bf9aaeff3e8 100644
--- a/arch/arm/boot/dts/at91-linea.dtsi
+++ b/arch/arm/boot/dts/at91-linea.dtsi
@@ -31,7 +31,7 @@
 	status = "okay";
 
 	eeprom@51 {
-		compatible = "st,24c64";
+		compatible = "st,24c64", "atmel,24c64";
 		reg = <0x51>;
 		pagesize = <32>;
 	};
diff --git a/arch/arm/boot/dts/at91-tse850-3.dts b/arch/arm/boot/dts/at91-tse850-3.dts
index 7a68805a4eb5..e760e5982565 100644
--- a/arch/arm/boot/dts/at91-tse850-3.dts
+++ b/arch/arm/boot/dts/at91-tse850-3.dts
@@ -239,7 +239,7 @@
 	};
 
 	eeprom@50 {
-		compatible = "nxp,24c02";
+		compatible = "nxp,24c02", "atmel,24c02";
 		reg = <0x50>;
 		pagesize = <16>;
 	};
-- 
2.9.3