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Devicetree for 4.7:

Browse source 
- Rewrite of the unflattening code to avoid recursion and lessen the
   stack usage.
 
 - Rewrite of the phandle args parsing code to get rid of the fixed args
   size. This is needed for IOMMU code.
 
 - Sync to latest dtc which adds more dts style checking. These warnings
   are enabled with "W=1" compiles.
 
 - Tegra documentation updates related to the above warnings.
 
 - A bunch of spelling and other doc fixes.
 
 - Various vendor prefix additions.
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Merge tag 'devicetree-for-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull devicetree updates from Rob Herring:

 - Rewrite of the unflattening code to avoid recursion and lessen the
   stack usage.

 - Rewrite of the phandle args parsing code to get rid of the fixed args
   size.  This is needed for IOMMU code.

 - Sync to latest dtc which adds more dts style checking.  These
   warnings are enabled with "W=1" compiles.

 - Tegra documentation updates related to the above warnings.

 - A bunch of spelling and other doc fixes.

 - Various vendor prefix additions.

* tag 'devicetree-for-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (52 commits)
  devicetree: Add Creative Technology vendor id
  gpio: dt-bindings: add ibm,ppc4xx-gpio binding
  of/unittest: Remove unnecessary module.h header inclusion
  drivers/of: Fix build warning in populate_node()
  drivers/of: Fix depth when unflattening devicetree
  of: dynamic: changeset prop-update revert fix
  drivers/of: Export of_detach_node()
  drivers/of: Return allocated memory from of_fdt_unflatten_tree()
  drivers/of: Specify parent node in of_fdt_unflatten_tree()
  drivers/of: Rename unflatten_dt_node()
  drivers/of: Avoid recursively calling unflatten_dt_node()
  drivers/of: Split unflatten_dt_node()
  of: include errno.h in of_graph.h
  of: document refcount incrementation of of_get_cpu_node()
  Documentation: dt: soc: fix spelling mistakes
  Documentation: dt: power: fix spelling mistake
  Documentation: dt: pinctrl: fix spelling mistake
  Documentation: dt: opp: fix spelling mistake
  Documentation: dt: net: fix spelling mistakes
  Documentation: dt: mtd: fix spelling mistake
  ...
This commit is contained in:
Linus Torvalds 2016-05-20 14:51:34 -07:00
commit e7f44b65b5
56 changed files with 595 additions and 290 deletions
Download patch file Download diff file Expand all files Collapse all files

38
drivers/iommu/arm-smmu.c
View file

@ -50,7 +50,7 @@
#include "io-pgtable.h"
/* Maximum number of stream IDs assigned to a single device */
#define MAX_MASTER_STREAMIDS MAX_PHANDLE_ARGS
#define MAX_MASTER_STREAMIDS 128
/* Maximum number of context banks per SMMU */
#define ARM_SMMU_MAX_CBS 128
@ -397,6 +397,12 @@ struct arm_smmu_domain {
struct iommu_domain domain;
};
struct arm_smmu_phandle_args {
struct device_node *np;
int args_count;
uint32_t args[MAX_MASTER_STREAMIDS];
};
static DEFINE_SPINLOCK(arm_smmu_devices_lock);
static LIST_HEAD(arm_smmu_devices);
@ -506,7 +512,7 @@ static int insert_smmu_master(struct arm_smmu_device *smmu,
static int register_smmu_master(struct arm_smmu_device *smmu,
struct device *dev,
struct of_phandle_args *masterspec)
struct arm_smmu_phandle_args *masterspec)
{
int i;
struct arm_smmu_master *master;
@ -1875,7 +1881,8 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev)
struct arm_smmu_device *smmu;
struct device *dev = &pdev->dev;
struct rb_node *node;
struct of_phandle_args masterspec;
struct of_phandle_iterator it;
struct arm_smmu_phandle_args *masterspec;
int num_irqs, i, err;
smmu = devm_kzalloc(dev, sizeof(*smmu), GFP_KERNEL);
@ -1938,20 +1945,35 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev)
i = 0;
smmu->masters = RB_ROOT;
while (!of_parse_phandle_with_args(dev->of_node, "mmu-masters",
"#stream-id-cells", i,
&masterspec)) {
err = register_smmu_master(smmu, dev, &masterspec);
err = -ENOMEM;
/* No need to zero the memory for masterspec */
masterspec = kmalloc(sizeof(*masterspec), GFP_KERNEL);
if (!masterspec)
goto out_put_masters;
of_for_each_phandle(&it, err, dev->of_node,
"mmu-masters", "#stream-id-cells", 0) {
int count = of_phandle_iterator_args(&it, masterspec->args,
MAX_MASTER_STREAMIDS);
masterspec->np = of_node_get(it.node);
masterspec->args_count = count;
err = register_smmu_master(smmu, dev, masterspec);
if (err) {
dev_err(dev, "failed to add master %s\n",
masterspec.np->name);
masterspec->np->name);
kfree(masterspec);
goto out_put_masters;
}
i++;
}
dev_notice(dev, "registered %d master devices\n", i);
kfree(masterspec);
parse_driver_options(smmu);
if (smmu->version == ARM_SMMU_V2 &&