diff options
| author | Sergio Paracuellos <sergio.paracuellos@gmail.com> | 2020-03-21 08:26:49 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-21 10:31:54 +0100 |
| commit | 0d326e722d76f1e8227f92573c6b7b69025c52b4 (patch) | |
| tree | 17463aec1ece01253539b7341f60d7e5f48ccd82 /drivers/staging/mt7621-dts | |
| parent | 5d6633b26bc3b6d1f84f014397380215c4dcde39 (diff) | |
staging: mt7621-dts: gpio 8 and 9 are vendor specific
There are three pins that can be used for reset gpios.
As mentioned in the application note, there are two
possible way of wiring pcie reset:
* connect gpio19 to all pcie reset pins
* connect gpio19 to pcie0 reset and pick two other
gpios for pcie1 and pcie2
gpio7 and gpio8 may not be used as pcie reset and are
vendor specific. Hence, maintain common mt7621.dtsi with
only gpio19 which is common and make an overlay for gnubee
board which uses all gpio's as resets for pcie. After this
changes release gpios in driver code is not needed anymore.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200321072650.7784-2-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/mt7621-dts')
| -rw-r--r-- | drivers/staging/mt7621-dts/gbpc1.dts | 4 | ||||
| -rw-r--r-- | drivers/staging/mt7621-dts/mt7621.dtsi | 4 |
2 files changed, 5 insertions, 3 deletions
diff --git a/drivers/staging/mt7621-dts/gbpc1.dts b/drivers/staging/mt7621-dts/gbpc1.dts index 1fb560ff059c..a7c0d3115d72 100644 --- a/drivers/staging/mt7621-dts/gbpc1.dts +++ b/drivers/staging/mt7621-dts/gbpc1.dts @@ -114,6 +114,10 @@ &pcie { pinctrl-names = "default"; pinctrl-0 = <&pcie_pins>; + + reset-gpios = <&gpio 19 GPIO_ACTIVE_LOW>, + <&gpio 8 GPIO_ACTIVE_LOW>, + <&gpio 7 GPIO_ACTIVE_LOW>; status = "okay"; }; diff --git a/drivers/staging/mt7621-dts/mt7621.dtsi b/drivers/staging/mt7621-dts/mt7621.dtsi index 10fb497cf81a..9e5cf68731bb 100644 --- a/drivers/staging/mt7621-dts/mt7621.dtsi +++ b/drivers/staging/mt7621-dts/mt7621.dtsi @@ -538,9 +538,7 @@ phys = <&pcie0_phy 1>, <&pcie2_phy 0>; phy-names = "pcie-phy0", "pcie-phy2"; - reset-gpios = <&gpio 19 GPIO_ACTIVE_LOW>, - <&gpio 8 GPIO_ACTIVE_LOW>, - <&gpio 7 GPIO_ACTIVE_LOW>; + reset-gpios = <&gpio 19 GPIO_ACTIVE_LOW>; pcie@0,0 { reg = <0x0000 0 0 0 0>; |