[U-Boot] [PATCH 0/2] Refactor EEPROM device tree and add default offset length
Masahiro Yamada (2): ARM: UniPhier: move EEPROM device node into a separate DTS ARM: UniPhier: set I2C offset length of on-board EEPROM in DTS
arch/arm/dts/uniphier-ph1-ld4-ref.dts | 5 +---- arch/arm/dts/uniphier-ph1-pro4-ref.dts | 5 +---- arch/arm/dts/uniphier-ph1-sld3-ref.dts | 5 +---- arch/arm/dts/uniphier-ph1-sld8-ref.dts | 5 +---- arch/arm/dts/uniphier-ref-daughter.dtsi | 16 ++++++++++++++++ 5 files changed, 20 insertions(+), 16 deletions(-) create mode 100644 arch/arm/dts/uniphier-ref-daughter.dtsi
This EEPROM chip is installed on the expansion board commonly used on UniPhier platform. To avoid duplicated description, move the EEPROM node to a separate file and include it from other device tree sources.
Signed-off-by: Masahiro Yamada yamada.m@jp.panasonic.com ---
arch/arm/dts/uniphier-ph1-ld4-ref.dts | 5 +---- arch/arm/dts/uniphier-ph1-pro4-ref.dts | 5 +---- arch/arm/dts/uniphier-ph1-sld3-ref.dts | 5 +---- arch/arm/dts/uniphier-ph1-sld8-ref.dts | 5 +---- arch/arm/dts/uniphier-ref-daughter.dtsi | 15 +++++++++++++++ 5 files changed, 19 insertions(+), 16 deletions(-) create mode 100644 arch/arm/dts/uniphier-ref-daughter.dtsi
diff --git a/arch/arm/dts/uniphier-ph1-ld4-ref.dts b/arch/arm/dts/uniphier-ph1-ld4-ref.dts index 6855878..48678cc 100644 --- a/arch/arm/dts/uniphier-ph1-ld4-ref.dts +++ b/arch/arm/dts/uniphier-ph1-ld4-ref.dts @@ -9,6 +9,7 @@
/dts-v1/; /include/ "uniphier-ph1-ld4.dtsi" +/include/ "uniphier-ref-daughter.dtsi"
/ { model = "Panasonic UniPhier PH1-LD4 Reference Board"; @@ -46,10 +47,6 @@
&i2c0 { status = "okay"; - eeprom { - compatible = "i2c-eeprom"; - reg = <0x50>; - }; };
&usb0 { diff --git a/arch/arm/dts/uniphier-ph1-pro4-ref.dts b/arch/arm/dts/uniphier-ph1-pro4-ref.dts index 1227b62..3ba779b 100644 --- a/arch/arm/dts/uniphier-ph1-pro4-ref.dts +++ b/arch/arm/dts/uniphier-ph1-pro4-ref.dts @@ -9,6 +9,7 @@
/dts-v1/; /include/ "uniphier-ph1-pro4.dtsi" +/include/ "uniphier-ref-daughter.dtsi"
/ { model = "Panasonic UniPhier PH1-Pro4 Reference Board"; @@ -48,10 +49,6 @@
&i2c0 { status = "okay"; - eeprom { - compatible = "i2c-eeprom"; - reg = <0x50>; - }; };
&usb0 { diff --git a/arch/arm/dts/uniphier-ph1-sld3-ref.dts b/arch/arm/dts/uniphier-ph1-sld3-ref.dts index fefc592..4961be8 100644 --- a/arch/arm/dts/uniphier-ph1-sld3-ref.dts +++ b/arch/arm/dts/uniphier-ph1-sld3-ref.dts @@ -9,6 +9,7 @@
/dts-v1/; /include/ "uniphier-ph1-sld3.dtsi" +/include/ "uniphier-ref-daughter.dtsi"
/ { model = "Panasonic UniPhier PH1-sLD3 Reference Board"; @@ -45,10 +46,6 @@
&i2c0 { status = "okay"; - eeprom { - compatible = "i2c-eeprom"; - reg = <0x50>; - }; };
&usb0 { diff --git a/arch/arm/dts/uniphier-ph1-sld8-ref.dts b/arch/arm/dts/uniphier-ph1-sld8-ref.dts index 9b6d95c..294c3eb 100644 --- a/arch/arm/dts/uniphier-ph1-sld8-ref.dts +++ b/arch/arm/dts/uniphier-ph1-sld8-ref.dts @@ -9,6 +9,7 @@
/dts-v1/; /include/ "uniphier-ph1-sld8.dtsi" +/include/ "uniphier-ref-daughter.dtsi"
/ { model = "Panasonic UniPhier PH1-sLD8 Reference Board"; @@ -46,10 +47,6 @@
&i2c0 { status = "okay"; - eeprom { - compatible = "i2c-eeprom"; - reg = <0x50>; - }; };
&usb0 { diff --git a/arch/arm/dts/uniphier-ref-daughter.dtsi b/arch/arm/dts/uniphier-ref-daughter.dtsi new file mode 100644 index 0000000..7b681c6 --- /dev/null +++ b/arch/arm/dts/uniphier-ref-daughter.dtsi @@ -0,0 +1,15 @@ +/* + * Device Tree Source for UniPhier Reference Daughter Board + * + * Copyright (C) 2014 Panasonic Corporation + * Author: Masahiro Yamada yamada.m@jp.panasonic.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +&i2c0 { + eeprom { + compatible = "i2c-eeprom"; + reg = <0x50>; + }; +};
The EEPROM chip on the UniPhier reference daughter board expects 2-byte offset address.
Since 7132b9fd68a1 (dm: i2c: dts: Support an offset-len device tree property), I2C sub-nodes can have "u-boot,i2c-offset-len" property.
It is convenient to set the default I2C offset address length in Device Tree, so that we do not have to set it on the command line.
Signed-off-by: Masahiro Yamada yamada.m@jp.panasonic.com ---
arch/arm/dts/uniphier-ref-daughter.dtsi | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/arm/dts/uniphier-ref-daughter.dtsi b/arch/arm/dts/uniphier-ref-daughter.dtsi index 7b681c6..2bb7697 100644 --- a/arch/arm/dts/uniphier-ref-daughter.dtsi +++ b/arch/arm/dts/uniphier-ref-daughter.dtsi @@ -11,5 +11,6 @@ eeprom { compatible = "i2c-eeprom"; reg = <0x50>; + u-boot,i2c-offset-len = <2>; }; };
participants (1)
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Masahiro Yamada