[PATCH v2 0/2] add the Amlogic Meson PCIe phy driver

[PATCH v2 0/2] add the Amlogic Meson PCIe phy driver

[Hanjie Lin]

This patcheset add the driver and dt-bindings for
the Meson-PCIE-PHY controller.

Changes since v1: [0]
 - move 'apb' and 'port' reset to ctrl driver
 - format correcting

[0] : https://lkml.org/lkml/2018/8/14/66 

Yue Wang (2):
  dt-bindings: phy: add DT bindings for Amlogic Meson PCIe Phy
    controller
  PCI: meson: add the Amlogic Meson PCIe phy driver

 .../bindings/phy/amlogic,meson-pcie-phy.txt        |  21 ++++
 drivers/phy/amlogic/Kconfig                        |   8 ++
 drivers/phy/amlogic/Makefile                       |   1 +
 drivers/phy/amlogic/phy-meson-axg-pcie.c           | 124 +++++++++++++++++++++
 4 files changed, 154 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/amlogic,meson-pcie-phy.txt
 create mode 100644 drivers/phy/amlogic/phy-meson-axg-pcie.c

-- 
2.7.4

[PATCH v2 1/2] dt-bindings: phy: add DT bindings for Amlogic Meson PCIe Phy controller

[Hanjie Lin]

From: Yue Wang <yue.wang@amlogic.com>

The Meson-PCIE-PHY controller supports the 5-Gbps data rate
of the PCI Express Gen 2 specification and is backward compatible
with the 2.5-Gbps Gen 1.1 specification with only
inferred idle detection supported on Amlogic SoCs.

Signed-off-by: Hanjie Lin <hanjie.lin@amlogic.com>
Signed-off-by: Yue Wang <yue.wang@amlogic.com>
---
 .../bindings/phy/amlogic,meson-pcie-phy.txt         | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/amlogic,meson-pcie-phy.txt

diff --git a/Documentation/devicetree/bindings/phy/amlogic,meson-pcie-phy.txt b/Documentation/devicetree/bindings/phy/amlogic,meson-pcie-phy.txt
new file mode 100644
index 0000000..e2f0a27
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/amlogic,meson-pcie-phy.txt
@@ -0,0 +1,21 @@
+* Amlogic Meson AXG PCIE PHY binding
+
+Required properties:
+- compatible:	Should be
+	- "amlogic,axg-pcie-phy"
+- #phys-cells:	must be 0 (see phy-bindings.txt in this directory)
+- reg:		The base address and length of the registers
+- resets:	phandle to the reset lines
+- reset-names:	must contain "phy" and "peripheral"
+	- "phy"	PHY reset
+Optional properties:
+- phy-supply:	see phy-bindings.txt in this directory
+
+Example:
+	pcie_phy: pcie-phy@ff644000 {
+		#phy-cells = <0>;
+		compatible = "amlogic,axg-pcie-phy";
+		reg = <0x0 0xff644000 0x0 0x2000>;
+		resets = <&reset RESET_PCIE_PHY>;
+		reset-names = "phy";
+	};
-- 
2.7.4

Re: [PATCH v2 1/2] dt-bindings: phy: add DT bindings for Amlogic Meson PCIe Phy controller

[Rob Herring]

On Fri, 24 Aug 2018 15:33:25 +0800, Hanjie Lin wrote:
> From: Yue Wang <yue.wang@amlogic.com>
> 
> The Meson-PCIE-PHY controller supports the 5-Gbps data rate
> of the PCI Express Gen 2 specification and is backward compatible
> with the 2.5-Gbps Gen 1.1 specification with only
> inferred idle detection supported on Amlogic SoCs.
> 
> Signed-off-by: Hanjie Lin <hanjie.lin@amlogic.com>
> Signed-off-by: Yue Wang <yue.wang@amlogic.com>
> ---
>  .../bindings/phy/amlogic,meson-pcie-phy.txt         | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/amlogic,meson-pcie-phy.txt
> 

Reviewed-by: Rob Herring <robh@kernel.org>

Re: [PATCH v2 1/2] dt-bindings: phy: add DT bindings for Amlogic Meson PCIe Phy controller

[Hanjie Lin]

On 2018/8/29 8:37, Rob Herring wrote:
> On Fri, 24 Aug 2018 15:33:25 +0800, Hanjie Lin wrote:
>> From: Yue Wang <yue.wang@amlogic.com>
>>
>> The Meson-PCIE-PHY controller supports the 5-Gbps data rate
>> of the PCI Express Gen 2 specification and is backward compatible
>> with the 2.5-Gbps Gen 1.1 specification with only
>> inferred idle detection supported on Amlogic SoCs.
>>
>> Signed-off-by: Hanjie Lin <hanjie.lin@amlogic.com>
>> Signed-off-by: Yue Wang <yue.wang@amlogic.com>
>> ---
>>  .../bindings/phy/amlogic,meson-pcie-phy.txt         | 21 +++++++++++++++++++++
>>  1 file changed, 21 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/phy/amlogic,meson-pcie-phy.txt
>>
> 
> Reviewed-by: Rob Herring <robh@kernel.org>
> 
> .
> 

Thanks for the review.

As described during the discussion [0], we consider it's too overkill to
have a dedicated phy driver which only process reset line. So we will abandon phy driver 
and integrate phy reset into the controller driver int the next version. 

[0] https://lkml.kernel.org/r/1535096165-45827-1-git-send-email-hanjie.lin@amlogic.