From: Gavin Shan <gwshan@linux.vnet.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: linux-pci@vger.kernel.org, devicetree@vger.kernel.org,
benh@kernel.crashing.org, mpe@ellerman.id.au, aik@ozlabs.ru,
dja@axtens.net, bhelgaas@google.com, robherring2@gmail.com,
grant.likely@linaro.org, Gavin Shan <gwshan@linux.vnet.ibm.com>,
Jyri Sarha <jsarha@ti.com>
Subject: [PATCH v8 43/45] drivers/of: Specify parent node in of_fdt_unflatten_tree()
Date: Wed, 17 Feb 2016 14:44:26 +1100 [thread overview]
Message-ID: <1455680668-23298-44-git-send-email-gwshan@linux.vnet.ibm.com> (raw)
In-Reply-To: <1455680668-23298-1-git-send-email-gwshan@linux.vnet.ibm.com>
This adds one more argument to of_fdt_unflatten_tree() to specify
the parent node of the FDT blob that is going to be unflattened.
In the result, the function can be used to unflatten FDT blob that
represents device sub-tree in PowerNV PCI hotplug driver.
Cc: Jyri Sarha <jsarha@ti.com>
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
---
drivers/gpu/drm/tilcdc/tilcdc_slave_compat.c | 2 +-
drivers/of/fdt.c | 14 ++++++++++----
drivers/of/unittest.c | 2 +-
include/linux/of_fdt.h | 1 +
4 files changed, 13 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_slave_compat.c b/drivers/gpu/drm/tilcdc/tilcdc_slave_compat.c
index 106679b..f9c79da 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_slave_compat.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_slave_compat.c
@@ -157,7 +157,7 @@ struct device_node * __init tilcdc_get_overlay(struct kfree_table *kft)
if (!overlay_data || kfree_table_add(kft, overlay_data))
return NULL;
- of_fdt_unflatten_tree(overlay_data, &overlay);
+ of_fdt_unflatten_tree(overlay_data, NULL, &overlay);
if (!overlay) {
pr_warn("%s: Unfattening overlay tree failed\n", __func__);
return NULL;
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 3fc9a30..16a1ba5 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -450,11 +450,13 @@ static int unflatten_dt_nodes(const void *blob,
* pointers of the nodes so the normal device-tree walking functions
* can be used.
* @blob: The blob to expand
+ * @dad: Parent device node
* @mynodes: The device_node tree created by the call
* @dt_alloc: An allocator that provides a virtual address to memory
* for the resulting tree
*/
static void __unflatten_device_tree(const void *blob,
+ struct device_node *dad,
struct device_node **mynodes,
void * (*dt_alloc)(u64 size, u64 align))
{
@@ -479,7 +481,7 @@ static void __unflatten_device_tree(const void *blob,
}
/* First pass, scan for size */
- size = unflatten_dt_nodes(blob, NULL, NULL, NULL);
+ size = unflatten_dt_nodes(blob, NULL, dad, NULL);
if (size < 0)
return;
@@ -495,7 +497,7 @@ static void __unflatten_device_tree(const void *blob,
pr_debug(" unflattening %p...\n", mem);
/* Second pass, do actual unflattening */
- unflatten_dt_nodes(blob, mem, NULL, mynodes);
+ unflatten_dt_nodes(blob, mem, dad, mynodes);
if (be32_to_cpup(mem + size) != 0xdeadbeef)
pr_warning("End of tree marker overwritten: %08x\n",
be32_to_cpup(mem + size));
@@ -512,6 +514,9 @@ static DEFINE_MUTEX(of_fdt_unflatten_mutex);
/**
* of_fdt_unflatten_tree - create tree of device_nodes from flat blob
+ * @blob: Flat device tree blob
+ * @dad: Parent device node
+ * @mynodes: The device tree created by the call
*
* unflattens the device-tree passed by the firmware, creating the
* tree of struct device_node. It also fills the "name" and "type"
@@ -519,10 +524,11 @@ static DEFINE_MUTEX(of_fdt_unflatten_mutex);
* can be used.
*/
void of_fdt_unflatten_tree(const unsigned long *blob,
+ struct device_node *dad,
struct device_node **mynodes)
{
mutex_lock(&of_fdt_unflatten_mutex);
- __unflatten_device_tree(blob, mynodes, &kernel_tree_alloc);
+ __unflatten_device_tree(blob, dad, mynodes, &kernel_tree_alloc);
mutex_unlock(&of_fdt_unflatten_mutex);
}
EXPORT_SYMBOL_GPL(of_fdt_unflatten_tree);
@@ -1180,7 +1186,7 @@ bool __init early_init_dt_scan(void *params)
*/
void __init unflatten_device_tree(void)
{
- __unflatten_device_tree(initial_boot_params, &of_root,
+ __unflatten_device_tree(initial_boot_params, NULL, &of_root,
early_init_dt_alloc_memory_arch);
/* Get pointer to "/chosen" and "/aliases" nodes for use everywhere */
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index 979b6e4..ec36f93 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -921,7 +921,7 @@ static int __init unittest_data_add(void)
"not running tests\n", __func__);
return -ENOMEM;
}
- of_fdt_unflatten_tree(unittest_data, &unittest_data_node);
+ of_fdt_unflatten_tree(unittest_data, NULL, &unittest_data_node);
if (!unittest_data_node) {
pr_warn("%s: No tree to attach; not running tests\n", __func__);
return -ENODATA;
diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h
index df9ef38..3644960 100644
--- a/include/linux/of_fdt.h
+++ b/include/linux/of_fdt.h
@@ -38,6 +38,7 @@ extern bool of_fdt_is_big_endian(const void *blob,
extern int of_fdt_match(const void *blob, unsigned long node,
const char *const *compat);
extern void of_fdt_unflatten_tree(const unsigned long *blob,
+ struct device_node *dad,
struct device_node **mynodes);
/* TBD: Temporary export of fdt globals - remove when code fully merged */
--
2.1.0
next prev parent reply other threads:[~2016-02-17 3:46 UTC|newest]
Thread overview: 152+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-17 3:43 [PATCH v8 00/45] powerpc/powernv: PCI hotplug support Gavin Shan
2016-02-17 3:43 ` [PATCH v8 01/45] PCI: Add pcibios_setup_bridge() Gavin Shan
2016-02-17 3:43 ` [PATCH v8 02/45] powerpc/pci: Override pcibios_setup_bridge() Gavin Shan
2016-04-13 5:52 ` Alexey Kardashevskiy
2016-02-17 3:43 ` [PATCH v8 03/45] powerpc/pci: Cleanup on struct pci_controller_ops Gavin Shan
2016-02-17 4:18 ` Andrew Donnellan
2016-04-13 5:52 ` Alexey Kardashevskiy
2016-04-19 23:59 ` Gavin Shan
2016-02-17 3:43 ` [PATCH v8 04/45] powerpc/powernv: Cleanup on pci_controller_ops instances Gavin Shan
2016-02-17 4:38 ` Andrew Donnellan
2016-02-17 3:43 ` [PATCH v8 05/45] powerpc/powernv: Drop phb->bdfn_to_pe() Gavin Shan
2016-04-13 5:53 ` Alexey Kardashevskiy
2016-02-17 3:43 ` [PATCH v8 06/45] powerpc/powernv: Reorder fields in struct pnv_phb Gavin Shan
2016-04-13 5:56 ` Alexey Kardashevskiy
2016-02-17 3:43 ` [PATCH v8 07/45] powerpc/powernv: Rename PE# " Gavin Shan
2016-04-13 5:57 ` Alexey Kardashevskiy
2016-02-17 3:43 ` [PATCH v8 08/45] powerpc/powernv: Fix initial IO and M32 segmap Gavin Shan
2016-04-13 6:21 ` Alexey Kardashevskiy
2016-04-13 7:53 ` Gavin Shan
2016-04-13 9:53 ` Alexey Kardashevskiy
2016-02-17 3:43 ` [PATCH v8 09/45] powerpc/powernv: Simplify pnv_ioda_setup_pe_seg() Gavin Shan
2016-04-13 6:45 ` Alexey Kardashevskiy
2016-04-20 0:04 ` Gavin Shan
2016-02-17 3:43 ` [PATCH v8 10/45] powerpc/powernv: IO and M32 mapping based on PCI device resources Gavin Shan
2016-02-17 3:43 ` [PATCH v8 11/45] powerpc/powernv: Track M64 segment consumption Gavin Shan
2016-04-13 7:09 ` Alexey Kardashevskiy
2016-04-20 0:05 ` Gavin Shan
2016-02-17 3:43 ` [PATCH v8 12/45] powerpc/powernv: Rename M64 related functions Gavin Shan
2016-04-13 7:20 ` Alexey Kardashevskiy
2016-02-17 3:43 ` [PATCH v8 13/45] powerpc/powernv/ioda1: M64 support on P7IOC Gavin Shan
2016-04-13 7:47 ` Alexey Kardashevskiy
2016-04-20 0:22 ` Gavin Shan
2016-04-20 2:55 ` Alexey Kardashevskiy
2016-02-17 3:43 ` [PATCH v8 14/45] powerpc/powernv/ioda1: Rename pnv_pci_ioda_setup_dma_pe() Gavin Shan
2016-04-13 7:36 ` Alexey Kardashevskiy
2016-02-17 3:43 ` [PATCH v8 15/45] powerpc/powernv/ioda1: Introduce PNV_IODA1_DMA32_SEGSIZE Gavin Shan
2016-04-13 8:29 ` Alexey Kardashevskiy
2016-04-13 23:54 ` Gavin Shan
2016-04-14 3:36 ` Alexey Kardashevskiy
2016-04-20 0:25 ` Gavin Shan
2016-02-17 3:43 ` [PATCH v8 16/45] powerpc/powernv: Remove DMA32 PE list Gavin Shan
2016-04-13 8:59 ` Alexey Kardashevskiy
2016-04-20 0:34 ` Gavin Shan
2016-02-17 3:44 ` [PATCH v8 17/45] powerpc/powernv/ioda1: Improve DMA32 segment track Gavin Shan
2016-04-19 1:50 ` Alexey Kardashevskiy
2016-04-20 0:49 ` Gavin Shan
2016-04-20 5:10 ` Alexey Kardashevskiy
2016-02-17 3:44 ` [PATCH v8 18/45] powerpc/powernv: Increase PE# capacity Gavin Shan
2016-04-19 2:02 ` Alexey Kardashevskiy
2016-04-20 0:52 ` Gavin Shan
2016-02-17 3:44 ` [PATCH v8 19/45] powerpc/powernv: Use PE instead of number during setup and release Gavin Shan
2016-04-19 2:50 ` Alexey Kardashevskiy
2016-02-17 3:44 ` [PATCH v8 20/45] powerpc/powernv: Allocate PE# in reverse order Gavin Shan
2016-04-19 3:07 ` Alexey Kardashevskiy
2016-04-20 1:04 ` Gavin Shan
2016-02-17 3:44 ` [PATCH v8 21/45] powerpc/powernv: Create PEs at PCI hot plugging time Gavin Shan
2016-04-19 4:16 ` Alexey Kardashevskiy
2016-04-20 1:12 ` Gavin Shan
2016-04-20 3:00 ` Alexey Kardashevskiy
2016-04-20 3:35 ` Gavin Shan
2016-02-17 3:44 ` [PATCH v8 22/45] powerpc/powernv/ioda1: Support releasing IODA1 TCE table Gavin Shan
2016-04-19 4:28 ` Alexey Kardashevskiy
2016-04-20 1:15 ` Gavin Shan
2016-04-20 3:17 ` Alexey Kardashevskiy
2016-02-17 3:44 ` [PATCH v8 23/45] powerpc/powernv: Dynamically release PEs Gavin Shan
2016-04-19 5:19 ` Alexey Kardashevskiy
2016-02-17 3:44 ` [PATCH v8 24/45] powerpc/pci: Rename pcibios_{add,remove}_pci_devices() Gavin Shan
2016-04-19 5:28 ` Alexey Kardashevskiy
2016-04-20 1:23 ` Gavin Shan
2016-04-20 3:21 ` Alexey Kardashevskiy
2016-02-17 3:44 ` [PATCH v8 25/45] powerpc/pci: Rename pcibios_find_pci_bus() Gavin Shan
2016-04-19 5:31 ` Alexey Kardashevskiy
2016-02-17 3:44 ` [PATCH v8 26/45] powerpc/pci: Move pci_find_bus_by_node() around Gavin Shan
2016-02-17 3:44 ` [PATCH v8 27/45] powerpc/pci: Export pci_add_device_node_info() Gavin Shan
2016-04-19 5:35 ` Alexey Kardashevskiy
2016-02-17 3:44 ` [PATCH v8 28/45] powerpc/pci: Introduce pci_remove_device_node_info() Gavin Shan
2016-04-19 5:48 ` Alexey Kardashevskiy
2016-04-20 1:25 ` Gavin Shan
2016-02-17 3:44 ` [PATCH v8 29/45] powerpc/pci: Export pci_traverse_device_nodes() Gavin Shan
2016-04-19 5:51 ` Alexey Kardashevskiy
2016-04-20 1:27 ` Gavin Shan
2016-04-20 3:39 ` Alexey Kardashevskiy
2016-02-17 3:44 ` [PATCH v8 30/45] powerpc/pci: Delay populating pdn Gavin Shan
2016-04-19 8:19 ` Alexey Kardashevskiy
2016-04-20 2:13 ` Gavin Shan
2016-04-20 3:54 ` Alexey Kardashevskiy
2016-02-17 3:44 ` [PATCH v8 31/45] powerpc/pci: Don't scan empty slot Gavin Shan
2016-04-19 8:19 ` Alexey Kardashevskiy
2016-02-17 3:44 ` [PATCH v8 32/45] powerpc/pci: Update bridge windows on PCI plug Gavin Shan
2016-04-19 8:47 ` Alexey Kardashevskiy
2016-02-17 3:44 ` [PATCH v8 33/45] powerpc/powernv: Simplify pnv_eeh_reset() Gavin Shan
2016-02-17 4:35 ` Andrew Donnellan
2016-04-19 8:49 ` Alexey Kardashevskiy
2016-02-17 3:44 ` [PATCH v8 34/45] powerpc/powernv: Exclude root bus in pnv_pci_reset_secondary_bus() Gavin Shan
2016-04-19 8:57 ` Alexey Kardashevskiy
2016-02-17 3:44 ` [PATCH v8 35/45] powerpc/powernv: Fundamental reset " Gavin Shan
2016-04-19 9:04 ` Alexey Kardashevskiy
2016-04-20 1:36 ` Gavin Shan
2016-02-17 3:44 ` [PATCH v8 36/45] powerpc/powernv: Support PCI slot ID Gavin Shan
2016-04-19 9:28 ` Alexey Kardashevskiy
2016-04-20 2:28 ` Gavin Shan
2016-04-20 4:14 ` Alexey Kardashevskiy
2016-04-22 4:23 ` Alistair Popple
2016-02-17 3:44 ` [PATCH v8 37/45] powerpc/powernv: Use firmware PCI slot reset infrastructure Gavin Shan
2016-04-19 9:34 ` Alexey Kardashevskiy
2016-04-20 2:33 ` Gavin Shan
2016-04-20 4:17 ` Alexey Kardashevskiy
2016-02-17 3:44 ` [PATCH v8 38/45] powerpc/powernv: Functions to get/set PCI slot status Gavin Shan
2016-04-19 9:39 ` Alexey Kardashevskiy
2016-04-20 2:36 ` Gavin Shan
2016-04-20 4:25 ` Alexey Kardashevskiy
2016-02-17 3:44 ` [PATCH v8 39/45] powerpc/powernv: Select OF_DYNAMIC Gavin Shan
2016-04-19 9:42 ` Alexey Kardashevskiy
2016-04-20 2:38 ` Gavin Shan
2016-02-17 3:44 ` [PATCH v8 40/45] drivers/of: Split unflatten_dt_node() Gavin Shan
2016-02-17 14:30 ` Rob Herring
2016-04-20 2:38 ` Gavin Shan
2016-05-02 2:02 ` Gavin Shan
2016-02-17 3:44 ` [PATCH v8 41/45] drivers/of: Avoid recursively calling unflatten_dt_node() Gavin Shan
2016-02-17 14:53 ` Rob Herring
2016-02-17 3:44 ` [PATCH v8 42/45] drivers/of: Rename unflatten_dt_node() Gavin Shan
2016-02-17 14:59 ` Rob Herring
2016-02-19 3:16 ` Gavin Shan
2016-03-02 2:40 ` Rob Herring
2016-03-08 0:56 ` Gavin Shan
2016-03-17 13:31 ` Rob Herring
2016-03-17 22:44 ` Gavin Shan
2016-02-17 3:44 ` Gavin Shan [this message]
2016-02-17 15:00 ` [PATCH v8 43/45] drivers/of: Specify parent node in of_fdt_unflatten_tree() Rob Herring
2016-02-17 15:58 ` Jyri Sarha
2016-02-17 3:44 ` [PATCH v8 44/45] drivers/of: Return allocated memory from of_fdt_unflatten_tree() Gavin Shan
2016-02-17 3:44 ` [PATCH v8 45/45] PCI/hotplug: PowerPC PowerNV PCI hotplug driver Gavin Shan
2016-04-15 0:47 ` Alistair Popple
2016-04-15 1:39 ` Gavin Shan
2016-04-19 10:36 ` Alexey Kardashevskiy
2016-04-20 1:55 ` Alistair Popple
2016-05-02 23:41 ` Gavin Shan
2016-05-03 0:44 ` Alexey Kardashevskiy
2016-05-02 3:44 ` Gavin Shan
2016-05-02 6:11 ` Alexey Kardashevskiy
2016-05-02 23:38 ` Gavin Shan
2016-04-13 7:28 ` [PATCH v8 00/45] powerpc/powernv: PCI hotplug support Alexey Kardashevskiy
2016-04-13 7:42 ` Gavin Shan
2016-04-13 9:14 ` Alexey Kardashevskiy
2016-04-13 23:42 ` Gavin Shan
2016-04-13 23:57 ` Alistair Popple
2016-04-14 1:30 ` Gavin Shan
2016-04-14 3:38 ` Alexey Kardashevskiy
2016-04-15 16:10 ` Rob Herring
2016-04-20 2:40 ` Gavin Shan
2016-04-14 3:26 ` Alexey Kardashevskiy
2016-04-14 5:25 ` Gavin Shan
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