[PATCH v4 02/12] bus: mvebu-mbus: Introduce device tree binding
From: Ezequiel Garcia <hidden>
Date: 2013-06-19 20:07:16
Also in:
linux-devicetree
Subsystem:
arm/marvell dove/mv78xx0/orion soc support, the rest · Maintainers:
Andrew Lunn, Sebastian Hesselbarth, Gregory Clement, Linus Torvalds
This patch adds the most fundamental device-tree initialization. We only introduce what's required to be able to probe the mvebu-mbus driver from the DT. Follow-up patches will extend the device tree binding, allowing to describe static address decoding windows. Signed-off-by: Thomas Petazzoni <redacted> Signed-off-by: Ezequiel Garcia <redacted> --- drivers/bus/mvebu-mbus.c | 36 ++++++++++++++++++++++++++++++++++++ include/linux/mbus.h | 1 + 2 files changed, 37 insertions(+)
diff --git a/drivers/bus/mvebu-mbus.c b/drivers/bus/mvebu-mbus.c
index d0feee5..23f6ae6 100644
--- a/drivers/bus/mvebu-mbus.c
+++ b/drivers/bus/mvebu-mbus.c@@ -883,3 +883,39 @@ int __init mvebu_mbus_init(const char *soc, phys_addr_t mbuswins_phys_base, sdramwins_phys_base, sdramwins_size); } + +#ifdef CONFIG_OF +int __init mvebu_mbus_dt_init(void) +{ + struct resource mbuswins_res, sdramwins_res; + struct device_node *np; + const struct of_device_id *of_id; + int ret; + + np = of_find_matching_node(NULL, of_mvebu_mbus_ids); + if (!np) { + pr_err("could not find a matching SoC family\n"); + return -ENODEV; + } + + of_id = of_match_node(of_mvebu_mbus_ids, np); + mbus_state.soc = of_id->data; + + if (of_address_to_resource(np, 0, &mbuswins_res)) { + pr_err("cannot get MBUS register address\n"); + return -EINVAL; + } + + if (of_address_to_resource(np, 1, &sdramwins_res)) { + pr_err("cannot get SDRAM register address\n"); + return -EINVAL; + } + + ret = mvebu_mbus_common_init(&mbus_state, + mbuswins_res.start, + resource_size(&mbuswins_res), + sdramwins_res.start, + resource_size(&sdramwins_res)); + return ret; +} +#endif
diff --git a/include/linux/mbus.h b/include/linux/mbus.h
index dba482e..a93c62b 100644
--- a/include/linux/mbus.h
+++ b/include/linux/mbus.h@@ -68,5 +68,6 @@ int mvebu_mbus_del_window(phys_addr_t base, size_t size); int mvebu_mbus_init(const char *soc, phys_addr_t mbus_phys_base, size_t mbus_size, phys_addr_t sdram_phys_base, size_t sdram_size); +int mvebu_mbus_dt_init(void); #endif /* __LINUX_MBUS_H */
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1.8.1.5