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Date: Thu, 20 Jun 2013 17:25:12 +0900
From: Jingoo Han <jg1.han@...sung.com>
To: 'Tomasz Figa' <tomasz.figa@...il.com>
Cc: 'Kukjin Kim' <kgene.kim@...sung.com>,
'Bjorn Helgaas' <bhelgaas@...gle.com>,
linux-samsung-soc@...r.kernel.org, linux-pci@...r.kernel.org,
devicetree-discuss@...ts.ozlabs.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
'Grant Likely' <grant.likely@...retlab.ca>,
'Andrew Murray' <andrew.murray@....com>,
'Thomas Petazzoni' <thomas.petazzoni@...e-electrons.com>,
'Thierry Reding' <thierry.reding@...onic-design.de>,
'Jason Gunthorpe' <jgunthorpe@...idianresearch.com>,
'Arnd Bergmann' <arnd@...db.de>,
'Surendranath Gurivireddy Balla' <suren.reddy@...sung.com>,
'Siva Reddy Kallam' <siva.kallam@...sung.com>,
'Thomas Abraham' <thomas.abraham@...aro.org>,
Jingoo Han <jg1.han@...sung.com>
Subject: RE: [PATCH V6 3/3] ARM: dts: Add pcie controller node for Samsung
EXYNOS5440 SoC
On Thursday, June 20, 2013 5:04 PM, Tomasz Figa wrote:
>
> Hi Jingoo,
>
> On Thursday 20 of June 2013 16:12:24 Jingoo Han wrote:
> > Exynos5440 has two PCIe controllers which can be used as root complex
> > for PCIe interface.
> >
> > Signed-off-by: Jingoo Han <jg1.han@...sung.com>
> > ---
> > arch/arm/boot/dts/exynos5440-ssdk5440.dts | 8 ++++++
> > arch/arm/boot/dts/exynos5440.dtsi | 40
> > ++++++++++++++++++++++++++++- 2 files changed, 47 insertions(+), 1
> > deletion(-)
> >
> > diff --git a/arch/arm/boot/dts/exynos5440-ssdk5440.dts
> > b/arch/arm/boot/dts/exynos5440-ssdk5440.dts index f32cd77..3d93804
> > 100644
> > --- a/arch/arm/boot/dts/exynos5440-ssdk5440.dts
> > +++ b/arch/arm/boot/dts/exynos5440-ssdk5440.dts
> > @@ -65,4 +65,12 @@
> > clock-frequency = <50000000>;
> > };
> > };
> > +
> > + pcie0@...000 {
> > + reset-gpio = <&pin_ctrl 5 0>;
> > + };
> > +
> > + pcie1@...000 {
> > + reset-gpio = <&pin_ctrl 22 0>;
> > + };
> > };
> > diff --git a/arch/arm/boot/dts/exynos5440.dtsi
> > b/arch/arm/boot/dts/exynos5440.dtsi index 03d40c0..6295eda 100644
> > --- a/arch/arm/boot/dts/exynos5440.dtsi
> > +++ b/arch/arm/boot/dts/exynos5440.dtsi
> > @@ -126,7 +126,7 @@
> > clock-names = "spi", "spi_busclk0";
> > };
> >
> > - pinctrl {
> > + pin_ctrl: pinctrl {
> > compatible = "samsung,exynos5440-pinctrl";
> > reg = <0xE0000 0x1000>;
> > interrupts = <0 37 0>, <0 38 0>, <0 39 0>, <0 40 0>,
> > @@ -230,4 +230,42 @@
> > clocks = <&clock 24>;
> > clock-names = "usbhost";
> > };
>
> I think this patch should be split into two:
> - patch adding just generlic PCIe nodes for Exynos5440,
> - patch adding label to the pinctrl node (which is a prerequisite) and
> board-specific properties of PCIe nodes.
Do you mean the following?
1. patch adding just generlic PCIe nodes for Exynos5440
[PATCH] ARM: dts: Add pcie controller node for Samsung EXYNOS5440 SoC
arch/arm/boot/dts/exynos5440.dtsi
+
+ pcie@...000 {
+ compatible = "samsung,exynos5440-pcie";
+ reg = <0x290000 0x1000
+ 0x270000 0x1000
+ 0x271000 0x40>;
+ interrupts = <0 20 0>, <0 21 0>, <0 22 0>;
+ clocks = <&clock 28>, <&clock 27>;
+ clock-names = "pcie", "pcie_bus";
+ #address-cells = <3>;
+ #size-cells = <2>;
+ device_type = "pci";
+ ranges = <0x00000800 0 0x40000000 0x40000000 0 0x00001000 /* configuration space */
+ 0x81000000 0 0 0x40001000 0 0x00010000 /* downstream I/O */
+ 0x82000000 0 0x40011000 0x40011000 0 0x1ffef000>; /* non-prefetchable memory */
+ #interrupt-cells = <1>;
+ interrupt-map-mask = <0 0 0 0>;
+ interrupt-map = <0x0 0 &gic 53>;
+ };
+
+ pcie@...000 {
+ compatible = "samsung,exynos5440-pcie";
+ reg = <0x2a0000 0x1000
+ 0x272000 0x1000
+ 0x271040 0x40>;
+ interrupts = <0 23 0>, <0 24 0>, <0 25 0>;
+ clocks = <&clock 29>, <&clock 27>;
+ clock-names = "pcie", "pcie_bus";
+ #address-cells = <3>;
+ #size-cells = <2>;
+ device_type = "pci";
+ ranges = <0x00000800 0 0x60000000 0x60000000 0 0x00001000 /* configuration space */
+ 0x81000000 0 0 0x60001000 0 0x00010000 /* downstream I/O */
+ 0x82000000 0 0x60011000 0x60011000 0 0x1ffef000>; /* non-prefetchable memory */
+ #interrupt-cells = <1>;
+ interrupt-map-mask = <0 0 0 0>;
+ interrupt-map = <0x0 0 &gic 56>;
+ };
2. patch adding label to the pinctrl node (which is a prerequisite) and
board-specific properties of PCIe nodes.
[PATCH] ARM: dts: Add pcie controller node for exynos5440-ssdk5440
arch/arm/boot/dts/exynos5440-ssdk5440.dts
+
+ pcie0@...000 {
+ reset-gpio = <&pin_ctrl 5 0>;
+ };
+
+ pcie1@...000 {
+ reset-gpio = <&pin_ctrl 22 0>;
+ };
arch/arm/boot/dts/exynos5440.dtsi
- pinctrl {
+ pin_ctrl: pinctrl {
>
> > +
> > + pcie0@...000 {
>
> Node naming looks incorrect here. The name should be as generic as
> possible, without any hardware-specific IDs, e.g. pcie, not pcie0. The
> @290000 suffix is enough to make the node unique.
I see. You are right.
I will fix it.
Best regards,
Jingoo Han
>
> > + compatible = "samsung,exynos5440-pcie";
> > + reg = <0x290000 0x1000
> > + 0x270000 0x1000
> > + 0x271000 0x40>;
> > + interrupts = <0 20 0>, <0 21 0>, <0 22 0>;
> > + clocks = <&clock 28>, <&clock 27>;
> > + clock-names = "pcie", "pcie_bus";
> > + #address-cells = <3>;
> > + #size-cells = <2>;
> > + device_type = "pci";
> > + ranges = <0x00000800 0 0x40000000 0x40000000 0 0x00001000
> /*
> > configuration space */ + 0x81000000 0 0
> 0x40001000 0 0x00010000
> > /* downstream I/O */ + 0x82000000 0 0x40011000
> 0x40011000 0
> > 0x1ffef000>; /* non-prefetchable memory */ + #interrupt-cells =
> <1>;
> > + interrupt-map-mask = <0 0 0 0>;
> > + interrupt-map = <0x0 0 &gic 53>;
> > + };
> > +
> > + pcie1@...000 {
>
> Same here.
>
> Best regards,
> Tomasz
>
> > + compatible = "samsung,exynos5440-pcie";
> > + reg = <0x2a0000 0x1000
> > + 0x272000 0x1000
> > + 0x271040 0x40>;
> > + interrupts = <0 23 0>, <0 24 0>, <0 25 0>;
> > + clocks = <&clock 29>, <&clock 27>;
> > + clock-names = "pcie", "pcie_bus";
> > + #address-cells = <3>;
> > + #size-cells = <2>;
> > + device_type = "pci";
> > + ranges = <0x00000800 0 0x60000000 0x60000000 0 0x00001000
> /*
> > configuration space */ + 0x81000000 0 0
> 0x60001000 0 0x00010000
> > /* downstream I/O */ + 0x82000000 0 0x60011000
> 0x60011000 0
> > 0x1ffef000>; /* non-prefetchable memory */ + #interrupt-cells =
> <1>;
> > + interrupt-map-mask = <0 0 0 0>;
> > + interrupt-map = <0x0 0 &gic 56>;
> > + };
> > };
--
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