[PATCH v6 3/3] PCI: imx6: Add support for i.MX6 PCIe controller

[Richard Zhu]

Hi Shawn & Harro:

> -----Original Message-----
> From: Zhu Richard-R65037
> Sent: Tuesday, November 26, 2013 12:36 PM
> To: 'Shawn Guo'
> Cc: Harro Haan; linux-arm-kernel at lists.infradead.org; Sinan Akman; Marek Vašut;
> Pratyush Anand; Tim Harvey; Jingoo Han; Troy Kisky; Sean Cross; Sascha Hauer;
> Bjorn Helgaas
> Subject: RE: [PATCH v6 3/3] PCI: imx6: Add support for i.MX6 PCIe controller
> 
> Hi Shawn:
> 
> 
> > -----Original Message-----
> > From: Shawn Guo [mailto:shawn.guo at linaro.org]
> > Sent: Tuesday, November 26, 2013 12:32 PM
> > To: Zhu Richard-R65037
> > Cc: Harro Haan; linux-arm-kernel at lists.infradead.org; Sinan Akman;
> > Marek Vašut; Pratyush Anand; Tim Harvey; Jingoo Han; Troy Kisky; Sean
> > Cross; Sascha Hauer; Bjorn Helgaas
> > Subject: Re: [PATCH v6 3/3] PCI: imx6: Add support for i.MX6 PCIe
> > controller
> >
> > Richard,
> >
> > On Tue, Nov 26, 2013 at 02:20:15AM +0000, Richard Zhu wrote:
<...>
> >
> > Since v3.13-rc1 is out there with pci-imx6 driver merged, can you
> > please give it a test to see what's missing there at platform level to
> > get PCIe support on imx6q-sabresd?  That will be easy for Harro to follow.
> >
> > Shawn
> [Richard] Ok, no problem, I'm preparing the test, would post the status later.
> 
[Richard] Based on the tag " pci-v3.13-fixes-1" on pci git-repos, imx6 pcie had been tested on imx6 sabresd board.

The pcie works after enable pcie support in imx6qdl-sabresd.dtsi file.

Patch:
Author: Richard Zhu <r65037 at freescale.com>
Date:   Tue Nov 26 13:29:24 2013 +0800

    pcie: imx6: enable pcie on imx6qdl sabresd board

    Add pcie device tree node into imx6qdl dts file,
    enable pcie on imx6qdl sabresd board

    Signed-off-by: Richard Zhu <r65037 at freescale.com>

diff --git a/arch/arm/boot/dts/imx6qdl-sabresd.dtsi b/arch/arm/boot/dts/imx6qdl-sabresd.dtsi
index e75e11b..b821f87 100644
--- a/arch/arm/boot/dts/imx6qdl-sabresd.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-sabresd.dtsi
@@ -212,6 +212,12 @@
        };
 };

+&pcie {
+       power-on-gpio = <&gpio3 19 0>;
+       reset-gpio = <&gpio7 12 0>;
+       status = "okay";
+};
+
 &pwm1 {
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_pwm0_1>;

LOGs when e1000e nic is used:
uname -a
Linux freescale 3.12.0+ #49 SMP Tue Nov 26 13:26:03 CST 2013 armv7l GNU/Linux
root at freescale ~$ lspci -v
00:00.0 PCI bridge: Unknown device 16c3:abcd (rev 01) (prog-if 00 [Normal decode])
        Flags: bus master, fast devsel, latency 0
        Memory at 01000000 (32-bit, non-prefetchable) [size=1M]
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
        I/O behind bridge: 00001000-00001fff
        Memory behind bridge: 01100000-011fffff
        Prefetchable memory behind bridge: 01200000-012fffff
        [virtual] Expansion ROM at 01300000 [disabled] [size=64K]
        Capabilities: [40] Power Management version 3
        Capabilities: [50] Message Signalled Interrupts: Mask+ 64bit+ Queue=0/0 Enable-
        Capabilities: [70] Express Root Port (Slot-) IRQ 0
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [140] Virtual Channel

01:00.0 Ethernet controller: Intel Corporation Unknown device 10d3
        Subsystem: Intel Corporation Unknown device a01f
        Flags: bus master, fast devsel, latency 0, IRQ 155
        Memory at 01180000 (32-bit, non-prefetchable) [size=128K]
        Memory at 01100000 (32-bit, non-prefetchable) [size=512K]
        I/O ports at 1000 [disabled] [size=32]
        Memory at 011a0000 (32-bit, non-prefetchable) [size=16K]
        [virtual] Expansion ROM at 01200000 [disabled] [size=256K]
        Capabilities: [c8] Power Management version 2
        Capabilities: [d0] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
        Capabilities: [e0] Express Endpoint IRQ 0
        Capabilities: [a0] MSI-X: Enable- Mask- TabSize=5
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [140] Device Serial Number 8b-18-3a-ff-ff-21-1b-00
> >
<...>
> 
> Best Regards
> Richard Zhu

[Richard] 
Best Regards
Richard Zhu