This patch adds functions to get a pointer to a sta2x11 instance data structure given a pointer to a connext device or device node. Such helpers will be used by the (now empty) common probe function, and maybe by the common clock framework. Signed-off-by: Davide Ciminaghi <ciminaghi@xxxxxxxxx> Acked-by: Giancarlo Asnaghi <giancarlo.asnaghi@xxxxxx> --- arch/x86/include/asm/sta2x11.h | 13 ++++++++ arch/x86/platform/sta2x11/sta2x11.c | 55 ++++++++++++++++++++++++++++++++++- 2 files changed, 67 insertions(+), 1 deletions(-) diff --git a/arch/x86/include/asm/sta2x11.h b/arch/x86/include/asm/sta2x11.h index 30dd761..6df0c87 100644 --- a/arch/x86/include/asm/sta2x11.h +++ b/arch/x86/include/asm/sta2x11.h @@ -49,6 +49,19 @@ struct sta2x11_instance_data { struct list_head list; }; +/* + * Helper functions: get the pointer to a sta2x11 instance given the pointer + * to a device/device node belonging to a connext chip + */ +extern struct sta2x11_instance_data * +sta2x11_node_to_instance(struct device_node *); + +static inline +struct sta2x11_instance_data *sta2x11_dev_to_instance(struct device *dev) +{ + return sta2x11_node_to_instance(dev->of_node); +} + #define STA2X11_SCTL_NAME "sta2x11-sctl" #define STA2X11_GPIO_NAME "sta2x11-gpio" #define STA2X11_SCR_NAME "sta2x11-scr" diff --git a/arch/x86/platform/sta2x11/sta2x11.c b/arch/x86/platform/sta2x11/sta2x11.c index 936a7ab..861d447 100644 --- a/arch/x86/platform/sta2x11/sta2x11.c +++ b/arch/x86/platform/sta2x11/sta2x11.c @@ -189,7 +189,60 @@ sta2x11_platform_regmap_configs[sta2x11_n_plat_devs] = { [sta2x11_scr] = &sta2x11_scr_regmap_config, }; -/* Probe for the four platform devices */ +static struct sta2x11_instance_data *find_instance(int id) +{ + struct sta2x11_instance_data *ptr; + list_for_each_entry(ptr, &connext_instances, list) + if (ptr->id == id) + return ptr; + return NULL; +} + +static struct sta2x11_instance_data +*connext_node_to_instance(struct device_node *n) +{ + struct resource r; + if (of_pci_parse_bus_range(n, &r) < 0) + return NULL; + return find_instance(r.start + 1); +} + +struct sta2x11_instance_data *sta2x11_node_to_instance(struct device_node *n) +{ + struct device_node *amba_bus, *pci_amba_bridge, *connext_node = NULL, + *parent; + + if (!of_node_cmp(n->type, "pci")) { + /* A pci node */ + for (parent = n->parent; parent; parent = parent->parent) { + if (of_device_is_compatible(parent, "pci104a,cc17")) { + connext_node = parent; + break; + } + } + if (!connext_node) + return NULL; + return connext_node_to_instance(connext_node); + } + + /* An amba or platform device (or even an amba bus node) */ + amba_bus = n; + if (!of_device_is_compatible(n, "arm,amba-bus")) + amba_bus = n->parent; + if (!amba_bus || !of_device_is_compatible(amba_bus, "arm,amba-bus")) + return NULL; + pci_amba_bridge = amba_bus->parent; + if (!pci_amba_bridge || !of_device_is_compatible(pci_amba_bridge, + "pci104a,cc18")) + return NULL; + connext_node = pci_amba_bridge->parent; + if (!connext_node || + !of_device_is_compatible(connext_node, "pci104a,cc17.0")) + return NULL; + return connext_node_to_instance(connext_node); +} +EXPORT_SYMBOL(sta2x11_node_to_instance); + static int sta2x11_platform_probe(struct platform_device *dev, enum sta2x11_plat_dev index) -- 1.7.7.2 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html