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[Qemu-devel] [PATCH 05/10] device_tree: Add support for reading device t
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PATCH 05/10] device_tree: Add support for reading device tree properties |
Date: |
Fri, 20 Jul 2012 16:00:25 +0100 |
Add support for reading device tree properties (both generic
and single-cell ones) to QEMU's convenience wrapper layer.
Signed-off-by: Peter Maydell <address@hidden>
Reviewed-by: Peter A. G. Crosthwaite <address@hidden>
---
device_tree.c | 30 ++++++++++++++++++++++++++++++
device_tree.h | 4 ++++
2 files changed, 34 insertions(+), 0 deletions(-)
diff --git a/device_tree.c b/device_tree.c
index b366fdd..d7a9b6b 100644
--- a/device_tree.c
+++ b/device_tree.c
@@ -178,6 +178,36 @@ int qemu_devtree_setprop_string(void *fdt, const char
*node_path,
return r;
}
+const void *qemu_devtree_getprop(void *fdt, const char *node_path,
+ const char *property, int *lenp)
+{
+ int len;
+ const void *r;
+ if (!lenp) {
+ lenp = &len;
+ }
+ r = fdt_getprop(fdt, findnode_nofail(fdt, node_path), property, lenp);
+ if (!r) {
+ fprintf(stderr, "%s: Couldn't get %s/%s: %s\n", __func__,
+ node_path, property, fdt_strerror(*lenp));
+ exit(1);
+ }
+ return r;
+}
+
+uint32_t qemu_devtree_getprop_cell(void *fdt, const char *node_path,
+ const char *property)
+{
+ int len;
+ const uint32_t *p = qemu_devtree_getprop(fdt, node_path, property, &len);
+ if (len != 4) {
+ fprintf(stderr, "%s: %s/%s not 4 bytes long (not a cell?)\n",
+ __func__, node_path, property);
+ exit(1);
+ }
+ return be32_to_cpu(*p);
+}
+
uint32_t qemu_devtree_get_phandle(void *fdt, const char *path)
{
uint32_t r;
diff --git a/device_tree.h b/device_tree.h
index 2244270..f7a3e6c 100644
--- a/device_tree.h
+++ b/device_tree.h
@@ -28,6 +28,10 @@ int qemu_devtree_setprop_string(void *fdt, const char
*node_path,
int qemu_devtree_setprop_phandle(void *fdt, const char *node_path,
const char *property,
const char *target_node_path);
+const void *qemu_devtree_getprop(void *fdt, const char *node_path,
+ const char *property, int *lenp);
+uint32_t qemu_devtree_getprop_cell(void *fdt, const char *node_path,
+ const char *property);
uint32_t qemu_devtree_get_phandle(void *fdt, const char *path);
uint32_t qemu_devtree_alloc_phandle(void *fdt);
int qemu_devtree_nop_node(void *fdt, const char *node_path);
--
1.7.5.4
- Re: [Qemu-devel] [PULL 00/10] arm-devs queue, (continued)
- Re: [Qemu-devel] [PULL 00/10] arm-devs queue, Blue Swirl, 2012/07/07
- [Qemu-devel] [PULL 00/10] arm-devs queue, Peter Maydell, 2012/07/20
- [Qemu-devel] [PATCH 04/10] hw/arm_boot.c: Check for RAM sizes exceeding ATAGS capacity, Peter Maydell, 2012/07/20
- [Qemu-devel] [PATCH 09/10] hw/exynos4210_rtc.c: remove unnecessary code, Peter Maydell, 2012/07/20
- [Qemu-devel] [PATCH 08/10] hw/exynos4210_rtc.c: Fix calculating for value of year, Peter Maydell, 2012/07/20
- [Qemu-devel] [PATCH 06/10] hw/arm_boot.c: Support DTBs which use 64 bit addresses, Peter Maydell, 2012/07/20
- [Qemu-devel] [PATCH 03/10] hw/arm_boot.c: Consistently use ram_size from arm_boot_info struct, Peter Maydell, 2012/07/20
- [Qemu-devel] [PATCH 10/10] exynos4210: add Exynos4210 i2c implementation, Peter Maydell, 2012/07/20
- [Qemu-devel] [PATCH 07/10] hw/vexpress.c: Allow >4GB of RAM for Cortex-A15 daughterboard, Peter Maydell, 2012/07/20
- [Qemu-devel] [PATCH 01/10] hw/pl011.c: Avoid crash on read when no chr backend present, Peter Maydell, 2012/07/20
- [Qemu-devel] [PATCH 05/10] device_tree: Add support for reading device tree properties,
Peter Maydell <=
- [Qemu-devel] [PATCH 02/10] hw/arm_boot.c: Make ram_size a uint64_t, Peter Maydell, 2012/07/20