Hi Scott,
please see my comments inline.
On 09/28/2013 12:54 AM, Scott Wood wrote:
On Wed, 2013-09-18 at 19:02 +0800, Minghuan Lian wrote:
@@ -592,6 +719,7 @@ int fsl_pci_mcheck_exception(struct pt_regs *regs)
#if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
struct device_node *fsl_pci_primary;
+extern const struct of_device_id fsl_pci_ids[];
Externs go in headers.
[Minghuan] ok.
-static int fsl_pci_probe(struct platform_device *pdev)
+static int __init fsl_pci_probe(struct platform_device *pdev)
{
int ret;
- struct device_node *node;
+ struct fsl_pci *pci;
+
+ if (!of_device_is_available(pdev->dev.of_node)) {
+ dev_warn(&pdev->dev, "disabled\n");
+ return -ENODEV;
+ }
This should be dev_dbg().
[Minghuan] ok.
-#ifdef CONFIG_PM
-static int fsl_pci_resume(struct device *dev)
+static int __exit fsl_pci_remove(struct platform_device *pdev)
Why __exit? What happens if someone unbinds the PCI controller via
sysfs?
[Minghuan] Sorry. should remove __exit
+/*
+ * Structure of a PCI controller (host bridge)
+ */
+struct fsl_pci {
+ struct list_head node;
+ int is_pcie;
bool is_pcie;
[Minghuan] ok.
+/* Return link status 0-> link, 1-> no link */
+int fsl_pci_check_link(struct fsl_pci *pci);
bool
[Minghuan] ok.
+
+/*
+ * The fsl_arch_* functions are arch hooks. Those functions are
+ * implemented as weak symbols so that they can be overridden by
+ * architecture specific code if needed.
+ */
+
+/* Return PCI64 DMA offset */
+u64 fsl_arch_pci64_dma_offset(void);
Is this always guaranteed to exist?
[Minghuan] Yes. I define a __weak implementation in pci-fsl.c
+/* Register PCI/PCIe controller to architecture system */
+int __weak fsl_arch_pci_sys_register(struct fsl_pci *pci);
+
+/* Remove PCI/PCIe controller from architecture system */
+void __weak fsl_arch_pci_sys_remove(struct fsl_pci *pci);
Why do these need to be weak? Won't there be exactly one implementation
per supported arch?
[Minghuan] I added __weak for compiling kernel when selecting pci-fsl
module but
there is no related arch pci implementation.
I can remove the __weak, and use
"depends on FSL_SOC_BOOKE || PPC_86xx" in Kconfig to make sure there is
one implementation
of supported arch.
-Scott
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