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| author | John Crispin <john@openwrt.org> | 2016-02-08 08:26:19 +0000 |
|---|---|---|
| committer | John Crispin <john@openwrt.org> | 2016-02-08 08:26:19 +0000 |
| commit | 7f672e66f8da2e51b72138697a6d055814df3ef5 (patch) | |
| tree | 37ff9a79e4c21a7e4be4e2bc43575c6491f67b72 | |
| parent | 480e15f2ce23c28eb75422c46eecd870e494fc6d (diff) | |
| download | upstream-7f672e66f8da2e51b72138697a6d055814df3ef5.tar.gz upstream-7f672e66f8da2e51b72138697a6d055814df3ef5.tar.bz2 upstream-7f672e66f8da2e51b72138697a6d055814df3ef5.zip | |
rampis: HLK-RM04 - Setup I2C as GPIO
The I2C function of the RT5350 SoC on the HLK-RM04 is used for GPIO1 and GPIO2.
Take note that the I2C_SD pin is GPIO1 on the RT5350 and is exposed on the HLK-RM04 as GPIO0
Likewise the I2C_SCLK pin is GPIO2 on the RT5350 and is exposed on the HLK-RM04 as GPIO1
group mode 1 mode 2 hlk-rm04 pin & export
i2c i2c_sd gpio1 (pin 8, hlk-rm04:gpio0)
i2c i2c_sclk gpio2 (pin 9, hlk-rm04:gpio1)
reference:
http://www.hlktech.net/product_detail.php?ProId=39
http://cdn.sparkfun.com/datasheets/Wireless/WiFi/RT5350.pdf
Signed-off-by: John Clark <inindev@gmail.com>
SVN-Revision: 48664
| -rw-r--r-- | target/linux/ramips/dts/HLKRM04.dts | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/target/linux/ramips/dts/HLKRM04.dts b/target/linux/ramips/dts/HLKRM04.dts index 5f43642c12..713b51f29b 100644 --- a/target/linux/ramips/dts/HLKRM04.dts +++ b/target/linux/ramips/dts/HLKRM04.dts @@ -60,7 +60,7 @@ pinctrl { state_default: pinctrl0 { gpio { - ralink,group = "jtag"; + ralink,group = "i2c", "jtag"; ralink,function = "gpio"; }; }; @@ -82,6 +82,25 @@ status = "okay"; }; + gpio-export { + compatible = "gpio-export"; + #size-cells = <0>; + + /* I2C */ + gpio1 { + /* I2C_I2C_SD */ + gpio-export,name = "hlk-rm04:gpio0"; + gpio-export,direction_may_change = <1>; + gpios = <&gpio0 1 0>; + }; + gpio2 { + /* I2C_I2C_SCLK */ + gpio-export,name = "hlk-rm04:gpio1"; + gpio-export,direction_may_change = <1>; + gpios = <&gpio0 2 0>; + }; + }; + gpio-keys-polled { compatible = "gpio-keys-polled"; #address-cells = <1>; |