Older Qualcomm SoCs (e.g. msm8953) have a qcom,rpm-proc with an smd-edge
subnode without compatible, which breaks probing any devices underneath
smd-edge like rpmcc. Manually find and bind nop_parent to smd-edge so
that probing of child devices can continue.
Example devicetree hierarchy:
/remoteproc -> qcom,rpm-proc
smd-edge -> (no compatible)
rpm-requests -> qcom,smd-rpm
clock-controller -> qcom,rpmcc
power-controller -> qcom,*-rpmpd
Signed-off-by: Luca Weiss <[email protected]>
---
drivers/clk/clk-stub.c | 36 +++++++++++++++++++++++++++++++++++-
1 file changed, 35 insertions(+), 1 deletion(-)
diff --git a/drivers/clk/clk-stub.c b/drivers/clk/clk-stub.c
index 4a6c71016da..6daf0efa8d0 100644
--- a/drivers/clk/clk-stub.c
+++ b/drivers/clk/clk-stub.c
@@ -9,10 +9,10 @@
#include <clk-uclass.h>
#include <dm.h>
+#include <dm/lists.h>
/* NOP parent nodes to stub clocks */
static const struct udevice_id nop_parent_ids[] = {
- { .compatible = "qcom,rpm-proc" },
{ .compatible = "qcom,glink-rpm" },
{ .compatible = "qcom,glink-smd-rpm" },
{ }
@@ -26,6 +26,40 @@ U_BOOT_DRIVER(nop_parent) = {
.flags = DM_FLAG_DEFAULT_PD_CTRL_OFF,
};
+int rpm_proc_bind(struct udevice *dev)
+{
+ ofnode child;
+ struct udevice *child_dev;
+ int ret;
+
+ /* smd-edge subnode has no compatible, bind nop_parent manually */
+ child = ofnode_find_subnode(dev_ofnode(dev), "smd-edge");
+ if (ofnode_valid(child)) {
+ ret = device_bind_driver_to_node(dev, "nop_parent", "smd-edge",
child, NULL);
+ if (ret)
+ return ret;
+ }
+
+ dev_for_each_subnode(child, dev) {
+ ret = lists_bind_fdt(dev, child, &child_dev, NULL, false);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct udevice_id rpm_proc_ids[] = {
+ { .compatible = "qcom,rpm-proc" },
+};
+
+U_BOOT_DRIVER(rpm_proc) = {
+ .name = "rpm_proc",
+ .id = UCLASS_NOP,
+ .of_match = rpm_proc_ids,
+ .bind = rpm_proc_bind,
+};
+
static ulong stub_clk_set_rate(struct clk *clk, ulong rate)
{
return (clk->rate = rate);
--
2.55.0
