diff options
Diffstat (limited to 'target/linux/mvebu/patches-3.10/0044-bus-mvebu-mbus-Introduce-device-tree-binding.patch')
| -rw-r--r-- | target/linux/mvebu/patches-3.10/0044-bus-mvebu-mbus-Introduce-device-tree-binding.patch | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/target/linux/mvebu/patches-3.10/0044-bus-mvebu-mbus-Introduce-device-tree-binding.patch b/target/linux/mvebu/patches-3.10/0044-bus-mvebu-mbus-Introduce-device-tree-binding.patch new file mode 100644 index 0000000000..ef2d1b4792 --- /dev/null +++ b/target/linux/mvebu/patches-3.10/0044-bus-mvebu-mbus-Introduce-device-tree-binding.patch @@ -0,0 +1,83 @@ +From e4123095febc94c547c0459db752e7879db79d76 Mon Sep 17 00:00:00 2001 +From: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> +Date: Tue, 21 May 2013 10:48:54 -0300 +Subject: [PATCH 044/203] bus: mvebu-mbus: Introduce device tree binding + +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 <thomas.petazzoni@free-electrons.com> +Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> +Tested-by: Andrew Lunn <andrew@lunn.ch> +Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> +--- + drivers/bus/mvebu-mbus.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++++ + include/linux/mbus.h | 1 + + 2 files changed, 50 insertions(+) + +--- a/drivers/bus/mvebu-mbus.c ++++ b/drivers/bus/mvebu-mbus.c +@@ -900,3 +900,52 @@ int __init mvebu_mbus_init(const char *s + 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, *controller; ++ const struct of_device_id *of_id; ++ const __be32 *prop; ++ 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; ++ ++ prop = of_get_property(np, "controller", NULL); ++ if (!prop) { ++ pr_err("required 'controller' property missing\n"); ++ return -EINVAL; ++ } ++ ++ controller = of_find_node_by_phandle(be32_to_cpup(prop)); ++ if (!controller) { ++ pr_err("could not find an 'mbus-controller' node\n"); ++ return -ENODEV; ++ } ++ ++ if (of_address_to_resource(controller, 0, &mbuswins_res)) { ++ pr_err("cannot get MBUS register address\n"); ++ return -EINVAL; ++ } ++ ++ if (of_address_to_resource(controller, 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 +--- a/include/linux/mbus.h ++++ b/include/linux/mbus.h +@@ -74,5 +74,6 @@ int mvebu_mbus_del_window(phys_addr_t ba + 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 */ |