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| author | Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> | 2013-08-13 16:25:23 +0400 |
|---|---|---|
| committer | Jason Cooper <jason@lakedaemon.net> | 2013-09-30 18:58:43 +0400 |
| commit | 52ba992e201f47b878019f268391aa0e27592906 (patch) | |
| tree | 597d5361fc22a4680c6ca1bff45becbe4b95a423 /Documentation | |
| parent | e5615c30c1c921dda957638ddf9c9437fcb7bb36 (diff) | |
| download | linux-52ba992e201f47b878019f268391aa0e27592906.tar.xz | |
PCI: mvebu: add support for reset on GPIO
This patch adds a check for DT passed reset-gpios property and deasserts/
asserts reset pin on probe/remove with configurable delay. Corresponding
binding documentation is also updated.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/pci/mvebu-pci.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pci/mvebu-pci.txt b/Documentation/devicetree/bindings/pci/mvebu-pci.txt index 638673aec306..8bb3245e1946 100644 --- a/Documentation/devicetree/bindings/pci/mvebu-pci.txt +++ b/Documentation/devicetree/bindings/pci/mvebu-pci.txt @@ -76,6 +76,8 @@ and the following optional properties: - marvell,pcie-lane: the physical PCIe lane number, for ports having multiple lanes. If this property is not found, we assume that the value is 0. +- reset-gpios: optional gpio to PERST# +- reset-delay-us: delay in us to wait after reset de-assertion Example: @@ -138,6 +140,10 @@ pcie-controller { interrupt-map = <0 0 0 0 &mpic 58>; marvell,pcie-port = <0>; marvell,pcie-lane = <0>; + /* low-active PERST# reset on GPIO 25 */ + reset-gpios = <&gpio0 25 1>; + /* wait 20ms for device settle after reset deassertion */ + reset-delay-us = <20000>; clocks = <&gateclk 5>; status = "disabled"; }; |