git.openwrt.org Git - openwrt/staging/xback.git/blob

   1 From 6964affe65066651eca21e97247d3b7cac5153dc Mon Sep 17 00:00:00 2001
   2 From: Andre Przywara <andre.przywara@arm.com>
   3 Date: Mon, 31 Oct 2022 11:13:53 +0000
   4 Subject: [PATCH] dt-bindings: phy: Add special clock for Allwinner H616 PHY
   5
   6 The USB PHY IP in the Allwinner H616 SoC requires a quirk that involves
   7 some resources from port 2's PHY and HCI IP. In particular the PMU clock
   8 for port 2 must be surely ungated before accessing the REG_HCI_PHY_CTL
   9 register of port 2. To allow each USB port to be controlled
  10 independently of port 2, we need a handle to that particular PMU clock
  11 in the *PHY* node, as the HCI and PHY part might be handled by separate
  12 drivers.
  13
  14 Add that clock to the requirements of the H616 PHY binding, so that a
  15 PHY driver can apply the quirk in isolation, without requiring help from
  16 port 2's HCI driver.
  17
  18 Signed-off-by: Andre Przywara <andre.przywara@arm.com>
  19 Reviewed-by: Rob Herring <robh@kernel.org>
  20 Link: https://lore.kernel.org/r/20221031111358.3387297-3-andre.przywara@arm.com
  21 Signed-off-by: Vinod Koul <vkoul@kernel.org>
  22 ---
  23  .../phy/allwinner,sun8i-h3-usb-phy.yaml       | 26 +++++++++++++++++++
  24  1 file changed, 26 insertions(+)
  25
  26 --- a/Documentation/devicetree/bindings/phy/allwinner,sun8i-h3-usb-phy.yaml
  27 +++ b/Documentation/devicetree/bindings/phy/allwinner,sun8i-h3-usb-phy.yaml
  28 @@ -36,18 +36,22 @@ properties:
  29        - const: pmu3
  30
  31    clocks:
  32 +    minItems: 4
  33      items:
  34        - description: USB OTG PHY bus clock
  35        - description: USB Host 0 PHY bus clock
  36        - description: USB Host 1 PHY bus clock
  37        - description: USB Host 2 PHY bus clock
  38 +      - description: PMU clock for host port 2
  39
  40    clock-names:
  41 +    minItems: 4
  42      items:
  43        - const: usb0_phy
  44        - const: usb1_phy
  45        - const: usb2_phy
  46        - const: usb3_phy
  47 +      - const: pmu2_clk
  48
  49    resets:
  50      items:
  51 @@ -96,6 +100,28 @@ required:
  52    - resets
  53    - reset-names
  54
  55 +allOf:
  56 +  - if:
  57 +      properties:
  58 +        compatible:
  59 +          contains:
  60 +            enum:
  61 +              - allwinner,sun50i-h616-usb-phy
  62 +    then:
  63 +      properties:
  64 +        clocks:
  65 +          minItems: 5
  66 +
  67 +        clock-names:
  68 +          minItems: 5
  69 +    else:
  70 +      properties:
  71 +        clocks:
  72 +          maxItems: 4
  73 +
  74 +        clock-names:
  75 +          maxItems: 4
  76 +
  77  additionalProperties: false
  78
  79  examples: