[PATCH v4 0/4] Add dbi2 and atu for i.MX8M PCIe EP

[PATCH v4 0/4] Add dbi2 and atu for i.MX8M PCIe EP

[Richard Zhu]

v4 changes:
- Add Frank's reviewed tag, and re-format the commit message.

v3 changes:
- Refine the commit descriptions.

v2 changes:
Thanks for Conor's comments.
- Place the new added properties at the end.

Ideally, dbi2 and atu base addresses should be fetched from DT.
Add dbi2 and atu base addresses for i.MX8M PCIe EP here.

[PATCH v4 1/4] dt-bindings: imx6q-pcie: Add reg-name "dbi2" and "atu"
[PATCH v4 2/4] dts: arm64: imx8mq: Add dbi2 and atu reg for i.MX8MQ
[PATCH v4 3/4] dts: arm64: imx8mp: Add dbi2 and atu reg for i.MX8MP
[PATCH v4 4/4] dts: arm64: imx8mm: Add dbi2 and atu reg for i.MX8MM

Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml | 13 +++++++++----
arch/arm64/boot/dts/freescale/imx8mm.dtsi                    |  8 +++++---
arch/arm64/boot/dts/freescale/imx8mp.dtsi                    |  7 +++++--
arch/arm64/boot/dts/freescale/imx8mq.dtsi                    |  8 +++++---
4 files changed, 24 insertions(+), 12 deletions(-)

[PATCH v4 1/4] dt-bindings: imx6q-pcie: Add reg-name "dbi2" and "atu" for i.MX8M PCIe Endpoint

[Richard Zhu]

Add reg-name: "dbi2", "atu" for i.MX8M PCIe Endpoint.

For i.MX8M PCIe EP, the dbi2 and atu addresses are pre-defined in the
driver. This method is not good.

In commit b7d67c6130ee ("PCI: imx6: Add iMX95 Endpoint (EP) support"),
Frank suggests to fetch the dbi2 and atu from DT directly. This commit is
preparation to do that for i.MX8M PCIe EP.

These changes wouldn't break driver function. When "dbi2" and "atu"
properties are present, i.MX PCIe driver would fetch the according base
addresses from DT directly. If only two reg properties are provided, i.MX
PCIe driver would fall back to the old method.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
---
 .../devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml  | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml
index a06f75df8458..84ca12e8b25b 100644
--- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml
+++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml
@@ -65,12 +65,14 @@ allOf:
     then:
       properties:
         reg:
-          minItems: 2
-          maxItems: 2
+          minItems: 4
+          maxItems: 4
         reg-names:
           items:
             - const: dbi
             - const: addr_space
+            - const: dbi2
+            - const: atu
 
   - if:
       properties:
@@ -129,8 +131,11 @@ examples:
 
     pcie_ep: pcie-ep@33800000 {
       compatible = "fsl,imx8mp-pcie-ep";
-      reg = <0x33800000 0x000400000>, <0x18000000 0x08000000>;
-      reg-names = "dbi", "addr_space";
+      reg = <0x33800000 0x100000>,
+            <0x18000000 0x8000000>,
+            <0x33900000 0x100000>,
+            <0x33b00000 0x100000>;
+      reg-names = "dbi", "addr_space", "dbi2", "atu";
       clocks = <&clk IMX8MP_CLK_HSIO_ROOT>,
                <&clk IMX8MP_CLK_HSIO_AXI>,
                <&clk IMX8MP_CLK_PCIE_ROOT>;
-- 
2.37.1

[PATCH v4 2/4] dts: arm64: imx8mq: Add dbi2 and atu reg for i.MX8MQ PCIe EP

[Richard Zhu]

Add dbi2 and iatu reg for i.MX8MQ PCIe EP.

For i.MX8M PCIe EP, the dbi2 and atu addresses are pre-defined in the
driver. This method is not good.

In commit b7d67c6130ee ("PCI: imx6: Add iMX95 Endpoint (EP) support"),
Frank suggests to fetch the dbi2 and atu from DT directly. This commit is
preparation to do that for i.MX8MQ PCIe EP.

These changes wouldn't break driver function. When "dbi2" and "atu"
properties are present, i.MX PCIe driver would fetch the according base
addresses from DT directly. If only two reg properties are provided, i.MX
PCIe driver would fall back to the old method.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx8mq.dtsi | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
index e03186bbc415..d51de8d899b2 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
@@ -1819,9 +1819,11 @@ pcie1: pcie@33c00000 {
 
 		pcie1_ep: pcie-ep@33c00000 {
 			compatible = "fsl,imx8mq-pcie-ep";
-			reg = <0x33c00000 0x000400000>,
-			      <0x20000000 0x08000000>;
-			reg-names = "dbi", "addr_space";
+			reg = <0x33c00000 0x100000>,
+			      <0x20000000 0x8000000>,
+			      <0x33d00000 0x100000>,
+			      <0x33f00000 0x100000>;
+			reg-names = "dbi", "addr_space", "dbi2", "atu";
 			num-lanes = <1>;
 			interrupts = <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>;
 			interrupt-names = "dma";
-- 
2.37.1

[PATCH v4 3/4] dts: arm64: imx8mp: Add dbi2 and atu reg for i.MX8MP PCIe EP

[Richard Zhu]

Add dbi2 and iatu reg for i.MX8MP PCIe EP.

For i.MX8M PCIe EP, the dbi2 and atu addresses are pre-defined in the
driver. This method is not good.

In commit b7d67c6130ee ("PCI: imx6: Add iMX95 Endpoint (EP) support"),
Frank suggests to fetch the dbi2 and atu from DT directly. This commit is
preparation to do that for i.MX8MP PCIe EP.

These changes wouldn't break driver function. When "dbi2" and "atu"
properties are present, i.MX PCIe driver would fetch the according base
addresses from DT directly. If only two reg properties are provided, i.MX
PCIe driver would fall back to the old method.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx8mp.dtsi | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
index 603dfe80216f..53748227db10 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
@@ -2125,8 +2125,11 @@ pcie: pcie@33800000 {
 
 		pcie_ep: pcie-ep@33800000 {
 			compatible = "fsl,imx8mp-pcie-ep";
-			reg = <0x33800000 0x000400000>, <0x18000000 0x08000000>;
-			reg-names = "dbi", "addr_space";
+			reg = <0x33800000 0x100000>,
+			      <0x18000000 0x8000000>,
+			      <0x33900000 0x100000>,
+			      <0x33b00000 0x100000>;
+			reg-names = "dbi", "addr_space", "dbi2", "atu";
 			clocks = <&clk IMX8MP_CLK_HSIO_ROOT>,
 				 <&clk IMX8MP_CLK_HSIO_AXI>,
 				 <&clk IMX8MP_CLK_PCIE_ROOT>;
-- 
2.37.1

[PATCH v4 4/4] dts: arm64: imx8mm: Add dbi2 and atu reg for i.MX8MM PCIe EP

[Richard Zhu]

Add dbi2 and iatu reg for i.MX8MM PCIe EP.

For i.MX8M PCIe EP, the dbi2 and atu addresses are pre-defined in the
driver. This method is not good.

In commit b7d67c6130ee ("PCI: imx6: Add iMX95 Endpoint (EP) support"),
Frank suggests to fetch the dbi2 and atu from DT directly. This commit is
preparation to do that for i.MX8MM PCIe EP.

These changes wouldn't break driver function. When "dbi2" and "atu"
properties are present, i.MX PCIe driver would fetch the according base
addresses from DT directly. If only two reg properties are provided, i.MX
PCIe driver would fall back to the old method.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx8mm.dtsi | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
index 9535dedcef59..4de3bf22902b 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
@@ -1375,9 +1375,11 @@ pcie0: pcie@33800000 {
 
 		pcie0_ep: pcie-ep@33800000 {
 			compatible = "fsl,imx8mm-pcie-ep";
-			reg = <0x33800000 0x400000>,
-			      <0x18000000 0x8000000>;
-			reg-names = "dbi", "addr_space";
+			reg = <0x33800000 0x100000>,
+			      <0x18000000 0x8000000>,
+			      <0x33900000 0x100000>,
+			      <0x33b00000 0x100000>;
+			reg-names = "dbi", "addr_space", "dbi2", "atu";
 			num-lanes = <1>;
 			interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_HIGH>;
 			interrupt-names = "dma";
-- 
2.37.1

Re: [PATCH v4 1/4] dt-bindings: imx6q-pcie: Add reg-name "dbi2" and "atu" for i.MX8M PCIe Endpoint

[Rob Herring (Arm)]

On Mon, 29 Jul 2024 09:56:42 +0800, Richard Zhu wrote:
> Add reg-name: "dbi2", "atu" for i.MX8M PCIe Endpoint.
> 
> For i.MX8M PCIe EP, the dbi2 and atu addresses are pre-defined in the
> driver. This method is not good.
> 
> In commit b7d67c6130ee ("PCI: imx6: Add iMX95 Endpoint (EP) support"),
> Frank suggests to fetch the dbi2 and atu from DT directly. This commit is
> preparation to do that for i.MX8M PCIe EP.
> 
> These changes wouldn't break driver function. When "dbi2" and "atu"
> properties are present, i.MX PCIe driver would fetch the according base
> addresses from DT directly. If only two reg properties are provided, i.MX
> PCIe driver would fall back to the old method.
> 
> Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
> Reviewed-by: Frank Li <Frank.Li@nxp.com>
> ---
>  .../devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml  | 13 +++++++++----
>  1 file changed, 9 insertions(+), 4 deletions(-)
> 

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

Re: [PATCH v4 2/4] dts: arm64: imx8mq: Add dbi2 and atu reg for i.MX8MQ PCIe EP

[Shawn Guo]

On Mon, Jul 29, 2024 at 09:56:43AM +0800, Richard Zhu wrote:
> Add dbi2 and iatu reg for i.MX8MQ PCIe EP.
> 
> For i.MX8M PCIe EP, the dbi2 and atu addresses are pre-defined in the
> driver. This method is not good.
> 
> In commit b7d67c6130ee ("PCI: imx6: Add iMX95 Endpoint (EP) support"),
> Frank suggests to fetch the dbi2 and atu from DT directly. This commit is
> preparation to do that for i.MX8MQ PCIe EP.
> 
> These changes wouldn't break driver function. When "dbi2" and "atu"
> properties are present, i.MX PCIe driver would fetch the according base
> addresses from DT directly. If only two reg properties are provided, i.MX
> PCIe driver would fall back to the old method.
> 
> Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
> Reviewed-by: Frank Li <Frank.Li@nxp.com>

"arm64: dts: ..." for subject prefix.

Shawn

RE: [PATCH v4 2/4] dts: arm64: imx8mq: Add dbi2 and atu reg for i.MX8MQ PCIe EP

[Hongxing Zhu]

> -----Original Message-----
> From: Shawn Guo <shawnguo2@yeah.net>
> Sent: 2024年8月13日 10:51
> To: Hongxing Zhu <hongxing.zhu@nxp.com>
> Cc: robh@kernel.org; krzk+dt@kernel.org; conor+dt@kernel.org;
> shawnguo@kernel.org; l.stach@pengutronix.de; devicetree@vger.kernel.org;
> linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
> linux-kernel@vger.kernel.org; kernel@pengutronix.de; imx@lists.linux.dev
> Subject: Re: [PATCH v4 2/4] dts: arm64: imx8mq: Add dbi2 and atu reg for
> i.MX8MQ PCIe EP
> 
> On Mon, Jul 29, 2024 at 09:56:43AM +0800, Richard Zhu wrote:
> > Add dbi2 and iatu reg for i.MX8MQ PCIe EP.
> >
> > For i.MX8M PCIe EP, the dbi2 and atu addresses are pre-defined in the
> > driver. This method is not good.
> >
> > In commit b7d67c6130ee ("PCI: imx6: Add iMX95 Endpoint (EP) support"),
> > Frank suggests to fetch the dbi2 and atu from DT directly. This commit
> > is preparation to do that for i.MX8MQ PCIe EP.
> >
> > These changes wouldn't break driver function. When "dbi2" and "atu"
> > properties are present, i.MX PCIe driver would fetch the according
> > base addresses from DT directly. If only two reg properties are
> > provided, i.MX PCIe driver would fall back to the old method.
> >
> > Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
> > Reviewed-by: Frank Li <Frank.Li@nxp.com>
> 
> "arm64: dts: ..." for subject prefix.
Sorry, would be correct in v5.

Best Regards
Richard Zhu
> 
> Shawn