On Tuesday, July 01, 2014 6:45 AM, Murali Karicheri wrote:
>
> Keystone PCIe controller is based on v3.65 version of the
> designware h/w. Main differences are
> 1. No ATU support
> 2. Legacy and MSI irq functions are implemented in
> application register space
> 3. MSI interrupts are multiplexed over 8 IRQ lines to the Host
> side.
> All of the Application register space handing code are organized into
> pci-keystone-dw.c and the functions are called from pci-keystone.c
> to implement PCI controller driver. Also add necessary DT documentation
> for the driver.
>
> Signed-off-by: Murali Karicheri <m-kariche...@ti.com>
>
> CC: Santosh Shilimkar <santosh.shilim...@ti.com>
> CC: Russell King <li...@arm.linux.org.uk>
> CC: Grant Likely <grant.lik...@linaro.org>
> CC: Rob Herring <robh...@kernel.org>
> CC: Mohit Kumar <mohit.ku...@st.com>
> CC: Jingoo Han <jg1....@samsung.com>
> CC: Bjorn Helgaas <bhelg...@google.com>
> CC: Pratyush Anand <pratyush.an...@st.com>
> CC: Richard Zhu <r65...@freescale.com>
> CC: Kishon Vijay Abraham I <kis...@ti.com>
> CC: Marek Vasut <ma...@denx.de>
> CC: Arnd Bergmann <a...@arndb.de>
> CC: Pawel Moll <pawel.m...@arm.com>
> CC: Mark Rutland <mark.rutl...@arm.com>
> CC: Ian Campbell <ijc+devicet...@hellion.org.uk>
> CC: Kumar Gala <ga...@codeaurora.org>
> CC: Randy Dunlap <rdun...@infradead.org>
> CC: Grant Likely <grant.lik...@linaro.org>
> ---
> .../devicetree/bindings/pci/pci-keystone.txt | 69 +++
> drivers/pci/host/Kconfig | 5 +
> drivers/pci/host/Makefile | 1 +
> drivers/pci/host/pci-keystone-dw.c | 523
> ++++++++++++++++++++
> drivers/pci/host/pci-keystone.c | 381 ++++++++++++++
> drivers/pci/host/pci-keystone.h | 56 +++
> 6 files changed, 1035 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/pci/pci-keystone.txt
> create mode 100644 drivers/pci/host/pci-keystone-dw.c
> create mode 100644 drivers/pci/host/pci-keystone.c
> create mode 100644 drivers/pci/host/pci-keystone.h
>
[.....]
> +
> +static int __init ks_pcie_probe(struct platform_device *pdev)
> +{
> + struct device_node *np = pdev->dev.of_node;
> + struct device *dev = &pdev->dev;
> + struct keystone_pcie *ks_pcie;
> + struct pcie_port *pp;
> + struct resource *res;
> + void __iomem *reg_p;
> + struct phy *phy;
> + int ret = 0;
> + u32 val;
> +
> + ks_pcie = devm_kzalloc(&pdev->dev, sizeof(*ks_pcie),
> + GFP_KERNEL);
> + if (!ks_pcie) {
> + dev_err(dev, "no memory for keystone pcie\n");
> + return -ENOMEM;
> + }
> + pp = &ks_pcie->pp;
> +
> + /* initialize SerDes Phy if present */
> + phy = devm_phy_get(dev, "pcie-phy");
> + if (phy)
> + ret = phy_init(phy);
Why don't you check 'ret' value?
How about the following?
+ /* initialize SerDes Phy if present */
+ phy = devm_phy_get(dev, "pcie-phy");
+ if (!IS_ERR_OR_NULL(phy) {
+ ret = phy_init(phy);
+ if (ret <0)
+ return ret;
+ }
Best regards,
Jingoo Han
[....]
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