usb: musb: cppi41: allow it to work again
since commit 33c300cb90a6 ("usb: musb: dsps:
don't fake of_node to musb core") we have been
preventing CPPI 4.1 from probing due to NULL
of_node. We can't revert said commit otherwise
a different regression would show up, so the fix
is to look for the parent device's (glue layer's)
of_node instead, since that's the thing which
is actually described in DTS.
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c
index 4d1b44c..d07cafb 100644
--- a/drivers/usb/musb/musb_cppi41.c
+++ b/drivers/usb/musb/musb_cppi41.c
@@ -614,7 +614,7 @@
{
struct musb *musb = controller->musb;
struct device *dev = musb->controller;
- struct device_node *np = dev->of_node;
+ struct device_node *np = dev->parent->of_node;
struct cppi41_dma_channel *cppi41_channel;
int count;
int i;
@@ -664,7 +664,7 @@
musb_dma->status = MUSB_DMA_STATUS_FREE;
musb_dma->max_len = SZ_4M;
- dc = dma_request_slave_channel(dev, str);
+ dc = dma_request_slave_channel(dev->parent, str);
if (!dc) {
dev_err(dev, "Failed to request %s.\n", str);
ret = -EPROBE_DEFER;
@@ -695,7 +695,7 @@
struct cppi41_dma_controller *controller;
int ret = 0;
- if (!musb->controller->of_node) {
+ if (!musb->controller->parent->of_node) {
dev_err(musb->controller, "Need DT for the DMA engine.\n");
return NULL;
}