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arm64: dts: marvell: 7040-db: Document the gpio expander 

Document all the GPIO of the expander based on the schematics

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
This commit is contained in:
Gregory CLEMENT 2017-10-05 18:05:11 +02:00
parent 30571678d8
commit a5f5c5bbef
1 changed files with 10 additions and 0 deletions
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arch/arm64/boot/dts/marvell/armada-7040-db.dts
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@ -143,6 +143,16 @@ expander0: pca9555@21 {
gpio-controller;
#gpio-cells = <2>;
reg = <0x21>;
/*
* IO0_0: USB3_PWR_EN0 IO1_0: USB_3_1_Dev_Detect
* IO0_1: USB3_PWR_EN1 IO1_1: USB2_1_current_limit
* IO0_2: DDR3_4_Detect IO1_2: Hcon_IO_RstN
* IO0_3: USB2_DEVICE_DETECT
* IO0_4: GPIO_0 IO1_4: SD_Status
* IO0_5: GPIO_1 IO1_5: LDO_5V_Enable
* IO0_6: IHB_5V_Enable IO1_6: PWR_EN_eMMC
* IO0_7: IO1_7: SDIO_Vcntrl
*/
};
};