On Mon, Feb 6, 2017 at 7:33 AM, Lucas Stach [off-list ref] wrote:

Am Montag, den 06.02.2017, 07:17 -0800 schrieb Andrey Smirnov:

quoted

Add various bits of code needed to support i.MX7D variant of the IP.

Cc: yurovsky at gmail.com
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Fabio Estevam <redacted>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Lee Jones <redacted>
Cc: linux-arm-kernel at lists.infradead.org
Cc: devicetree at vger.kernel.org
Cc: linux-kernel at vger.kernel.org
Signed-off-by: Andrey Smirnov <redacted>

Two small comments inline, otherwise looks real good now.

quoted

---
 .../devicetree/bindings/pci/fsl,imx6q-pcie.txt     |   6 +-
 drivers/pci/host/pci-imx6.c                        | 121 ++++++++++++++++-----
 include/linux/mfd/syscon/imx7-iomuxc-gpr.h         |   4 +
 3 files changed, 105 insertions(+), 26 deletions(-)

diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt
index 83aeb1f..9f57759 100644
--- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt
+++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt

@@ -4,7 +4,11 @@ This PCIe host controller is based on the Synopsis Designware PCIe IP
 and thus inherits all the common properties defined in designware-pcie.txt.

 Required properties:
-- compatible: "fsl,imx6q-pcie", "fsl,imx6sx-pcie", "fsl,imx6qp-pcie"
+- compatible:
+     - "fsl,imx6q-pcie"
+     - "fsl,imx6sx-pcie",
+     - "fsl,imx6qp-pcie"
+     - "fsl,imx7d-pcie"
 - reg: base address and length of the PCIe controller
 - interrupts: A list of interrupt outputs of the controller. Must contain an
   entry for each entry in the interrupt-names property.

This misses an "Additional required properties for imx7d-pcie" section
listing the required reset handles.

Darn! Forgot to update this part. Will fix in v4.

quoted

diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c
index 3ef8093..34a21c9 100644
--- a/drivers/pci/host/pci-imx6.c
+++ b/drivers/pci/host/pci-imx6.c

[...]

quoted

 static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
 {
      struct pcie_port *pp = &imx6_pcie->pp;

@@ -381,6 +416,11 @@ static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
      }

      switch (imx6_pcie->variant) {
+     case IMX7D:
+             reset_control_assert(imx6_pcie->apps_reset);

Can this reset assertion be moved into imx6_pcie_assert_core_reset()?
This may change the programming order slightly from the downstream
driver, but I guess that won't hurt if this is the equivalent of the
LTSSM enable signal.

I don't see why it wouldn't be possible to move it. I'll give it a try
on a real HW and update v4 accordingly.

Thanks,
Andrey Smirnov