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spi: cadence-qspi: allow parsing both "new" and "legacy" partitions 

In the "legacy" way, partitions are listed directly under the flash
node. In the "new" way, there is a partitions node under the flash node,
and the partitions are listed under that node. Allow parsing both styles
of partitions for finding the PHY pattern location.

Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
This commit is contained in:
Pratyush Yadav 2022-04-19 16:14:47 +05:30 committed by Praneeth Bajjuri
parent 842c6777d0
commit 2743c767ff
1 changed files with 36 additions and 12 deletions
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48
drivers/spi/cadence_qspi.c
View File

@ -911,12 +911,41 @@ static void cadence_spi_mem_do_calibration(struct spi_slave *spi,
ret);
}
static int cadence_spi_ofdata_phy_pattern(struct cadence_spi_platdata *plat,
ofnode flash_node)
{
ofnode subnode;
const char *label;
u32 start;
subnode = ofnode_find_subnode(flash_node, "partitions");
if (!ofnode_valid(subnode))
/*
* Maybe the node has legacy style partitions, listed directly
* under flash node.
*/
subnode = ofnode_first_subnode(flash_node);
else
subnode = ofnode_first_subnode(subnode);
while (ofnode_valid(subnode)) {
label = ofnode_read_string(subnode, "label");
if (label && strcmp(label, "ospi.phypattern") == 0) {
if (!ofnode_read_u32_array(subnode, "reg", &start, 1))
return start;
break;
}
subnode = ofnode_next_subnode(subnode);
}
return -ENOENT;
}
static int cadence_spi_ofdata_to_platdata(struct udevice *bus)
{
struct cadence_spi_platdata *plat = bus->platdata;
ofnode subnode;
const char *label;
u32 start;
int ret;
plat->regbase = (void *)devfdt_get_addr_index(bus, 0);
plat->ahbbase = (void *)devfdt_get_addr_size_index(bus, 1,
@ -969,16 +998,11 @@ static int cadence_spi_ofdata_to_platdata(struct udevice *bus)
48);
/* Find the PHY tuning pattern partition. */
subnode = ofnode_first_subnode(subnode);
while (ofnode_valid(subnode)) {
label = ofnode_read_string(subnode, "label");
if (label && strcmp(label, "ospi.phypattern") == 0) {
if (!ofnode_read_u32_array(subnode, "reg", &start, 1))
plat->phy_pattern_start = start;
break;
}
subnode = ofnode_next_subnode(subnode);
}
ret = cadence_spi_ofdata_phy_pattern(plat, subnode);
if (ret < 0)
dev_dbg(plat->dev, "Unable to find PHY pattern partition\n");
else
plat->phy_pattern_start = ret;
debug("%s: regbase=%p ahbbase=%p max-frequency=%d page-size=%d\n",
__func__, plat->regbase, plat->ahbbase, plat->max_hz,