[PATCH v3 03/10] soc: ti: k3-navss-ringacc: Initialize base address of ring cfg registers

[Chintan Vankar]

From: Kishon Vijay Abraham I <kishon at ti.com>

Initialize base address of ring config registers required to natively
setup ring cfg registers in the absence of Device Manager (DM) services
at R5 SPL stage. Since register property is defined as "ring" for PKTDMA
and "cfg" for UDMA, configure base address of ring configuration register
accordingly.

Signed-off-by: Kishon Vijay Abraham I <kishon at ti.com>
Signed-off-by: Siddharth Vadapalli <s-vadapalli at ti.com>
Signed-off-by: Chintan Vankar <c-vankar at ti.com>
---

Link to v2:
https://lore.kernel.org/r/20240425120822.2048012-4-c-vankar@ti.com/

Changes from v2 to v3:
- Since register property is defined as "ring" for PKTDMA and "cfg"
  for UDMA, change conditon to configure the base address of ring
  configuration register accordingly.

 drivers/soc/ti/k3-navss-ringacc.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/ti/k3-navss-ringacc.c b/drivers/soc/ti/k3-navss-ringacc.c
index d3f3d4761c..8ffb6137df 100644
--- a/drivers/soc/ti/k3-navss-ringacc.c
+++ b/drivers/soc/ti/k3-navss-ringacc.c
@@ -1029,8 +1029,8 @@ static int k3_nav_ringacc_init(struct udevice *dev, struct k3_nav_ringacc *ringa
 struct k3_nav_ringacc *k3_ringacc_dmarings_init(struct udevice *dev,
 						struct k3_ringacc_init_data *data)
 {
+	void __iomem *base_rt, *base_cfg;
 	struct k3_nav_ringacc *ringacc;
-	void __iomem *base_rt;
 	int i;
 
 	ringacc = devm_kzalloc(dev, sizeof(*ringacc), GFP_KERNEL);
@@ -1048,6 +1048,20 @@ struct k3_nav_ringacc *k3_ringacc_dmarings_init(struct udevice *dev,
 	if (!base_rt)
 		return ERR_PTR(-EINVAL);
 
+	/*
+	 * Since register property is defined as "ring" for PKTDMA and
+	 * "cfg" for UDMA, configure base address of ring configuration
+	 * register accordingly.
+	 */
+	base_cfg = dev_remap_addr_name(dev, "ring");
+	pr_debug("ring %p\n", base_cfg);
+	if (!base_cfg) {
+		base_cfg = dev_remap_addr_name(dev, "cfg");
+		pr_debug("cfg %p\n", base_cfg);
+		if (!base_cfg)
+			return ERR_PTR(-EINVAL);
+	}
+
 	ringacc->rings = devm_kzalloc(dev,
 				      sizeof(*ringacc->rings) *
 				      ringacc->num_rings * 2,
@@ -1062,6 +1076,7 @@ struct k3_nav_ringacc *k3_ringacc_dmarings_init(struct udevice *dev,
 	for (i = 0; i < ringacc->num_rings; i++) {
 		struct k3_nav_ring *ring = &ringacc->rings[i];
 
+		ring->cfg = base_cfg + KNAV_RINGACC_CFG_REGS_STEP * i;
 		ring->rt = base_rt + K3_DMARING_RING_RT_REGS_STEP * i;
 		ring->parent = ringacc;
 		ring->ring_id = i;
-- 
2.34.1