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| author | Florian Fainelli <f.fainelli@gmail.com> | 2018-08-31 22:20:37 +0300 |
|---|---|---|
| committer | Florian Fainelli <f.fainelli@gmail.com> | 2018-09-13 21:09:23 +0300 |
| commit | 046ead61dc6973da049e606485858cdbb601b1e0 (patch) | |
| tree | 80011e53e1ac51fa1a99a40a9603c0429935f5e2 /arch/arm/boot | |
| parent | b0465fdfdd7e7c1afe2fae1cb36b94e1ce89732e (diff) | |
| download | linux-046ead61dc6973da049e606485858cdbb601b1e0.tar.xz | |
ARM: dts: NSP: Enable SFP on bcm958625hr
Enable the SFP connected to port 5 of the switch and wire up all GPIOs
to the SFP cage. Because of a hardware limitation of the i2c controller
on the iProc SoCs which prevents large i2c (> 63 bytes) transactions to
work, we use the i2c-gpio interface instead, which does not have that
limitation. This allows us to read the SFP module EEPROM, which would
not be possible otherwise since it exceeds that size during a single
read transfer.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Diffstat (limited to 'arch/arm/boot')
| -rw-r--r-- | arch/arm/boot/dts/bcm958625hr.dts | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/bcm958625hr.dts b/arch/arm/boot/dts/bcm958625hr.dts index ea3fc194f8f3..a53a2f629d74 100644 --- a/arch/arm/boot/dts/bcm958625hr.dts +++ b/arch/arm/boot/dts/bcm958625hr.dts @@ -58,6 +58,24 @@ open-source; priority = <200>; }; + + /* Hardware I2C block cannot do more than 63 bytes per transfer, + * which would prevent reading from a SFP's EEPROM (256 byte). + */ + i2c1: i2c { + compatible = "i2c-gpio"; + sda-gpios = <&gpioa 5 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>; + scl-gpios = <&gpioa 4 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>; + }; + + sfp: sfp { + compatible = "sff,sfp"; + i2c-bus = <&i2c1>; + mod-def0-gpios = <&gpioa 28 GPIO_ACTIVE_LOW>; + los-gpios = <&gpioa 24 GPIO_ACTIVE_HIGH>; + tx-fault-gpios = <&gpioa 30 GPIO_ACTIVE_HIGH>; + tx-disable-gpios = <&gpioa 26 GPIO_ACTIVE_HIGH>; + }; }; &amac0 { @@ -210,6 +228,14 @@ reg = <4>; }; + port@5 { + label = "sfp"; + phy-mode = "sgmii"; + reg = <5>; + sfp = <&sfp>; + managed = "in-band-status"; + }; + port@8 { ethernet = <&amac2>; label = "cpu"; |