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Add support to fdt_slicer for the new style partition data documented in

Browse Source 
devicetree/bindings/mtd/partition.txt.

In the old style, all the children of the device node which did not have a
compatible property were the partitions.  In the new style, there is a child
node of the device which has a compatible string of "fixed-partitions", and
its children are the individual partitions.

Also, support the read-only property by setting the corresponding slice flag.
This commit is contained in:
Ian Lepore 2019-02-27 04:58:18 +00:00
parent 85f55a2a97
commit a6bcabcd06
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=344616
1 changed files with 44 additions and 21 deletions
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65
sys/dev/fdt/fdt_slicer.c
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@ -51,27 +51,17 @@ static int fill_slices(device_t dev, const char *provider,
static void fdt_slicer_init(void);
static int
fill_slices(device_t dev, const char *provider __unused,
struct flash_slice *slices, int *slices_num)
fill_slices_from_node(phandle_t node, struct flash_slice *slices, int *count)
{
char *slice_name;
phandle_t node, child;
char *label;
phandle_t child;
u_long base, size;
int i;
int flags, i;
ssize_t nmlen;
/*
* We assume the caller provides buffer for FLASH_SLICES_MAX_NUM
* flash_slice structures.
*/
if (slices == NULL) {
*slices_num = 0;
return (ENOMEM);
}
i = 0;
node = ofw_bus_get_node(dev);
for (child = OF_child(node); child != 0; child = OF_peer(child)) {
flags = FLASH_SLICES_FLAG_NONE;
/* Nodes with a compatible property are not slices. */
if (OF_hasprop(child, "compatible"))
@ -95,28 +85,61 @@ fill_slices(device_t dev, const char *provider __unused,
}
/* Retrieve label. */
nmlen = OF_getprop_alloc(child, "label", (void **)&slice_name);
nmlen = OF_getprop_alloc(child, "label", (void **)&label);
if (nmlen <= 0) {
/* Use node name if no label defined */
nmlen = OF_getprop_alloc(child, "name",
(void **)&slice_name);
nmlen = OF_getprop_alloc(child, "name", (void **)&label);
if (nmlen <= 0) {
debugf("slice i=%d with no name\n", i);
slice_name = NULL;
label = NULL;
}
}
if (OF_hasprop(child, "read-only"))
flags |= FLASH_SLICES_FLAG_RO;
/* Fill slice entry data. */
slices[i].base = base;
slices[i].size = size;
slices[i].label = slice_name;
slices[i].label = label;
slices[i].flags = flags;
i++;
}
*slices_num = i;
*count = i;
return (0);
}
static int
fill_slices(device_t dev, const char *provider __unused,
struct flash_slice *slices, int *slices_num)
{
phandle_t child, node;
/*
* We assume the caller provides buffer for FLASH_SLICES_MAX_NUM
* flash_slice structures.
*/
if (slices == NULL) {
*slices_num = 0;
return (ENOMEM);
}
node = ofw_bus_get_node(dev);
/*
* If there is a child node whose compatible is "fixed-partitions" then
* we have new-style data where all partitions are the children of that
* node. Otherwise we have old-style data where all the children of the
* device node are the partitions.
*/
child = fdt_find_compatible(node, "fixed-partitions", false);
if (child == 0)
return fill_slices_from_node(node, slices, slices_num);
else
return fill_slices_from_node(child, slices, slices_num);
}
static void
fdt_slicer_init(void)
{