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[v6,03/11] soc: ti: k3-navss-ringacc: Initialize base address of ring cfg registers

Message ID 20240826102515.2774296-4-c-vankar@ti.com
State Accepted
Delegated to: Tom Rini
Headers show
Series Add support for Ethernet Boot on SK-AM62 | expand

Commit Message

Chintan Vankar Aug. 26, 2024, 10:25 a.m. UTC 
From: Kishon Vijay Abraham I <kishon@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.

Reviewed-by: Alexander Sverdlin <alexander.sverdlin@siemens.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Signed-off-by: Chintan Vankar <c-vankar@ti.com>
---

Link to v5:
https://lore.kernel.org/r/20240813105400.4054657-4-c-vankar@ti.com/

Changes from v5 to v6:
- Added a Reviewed-by tag from Alexander Sverdlin.

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

Patch

diff --git a/drivers/soc/ti/k3-navss-ringacc.c b/drivers/soc/ti/k3-navss-ringacc.c
index b2643a30d3d..14114a65830 100644
--- a/drivers/soc/ti/k3-navss-ringacc.c
+++ b/drivers/soc/ti/k3-navss-ringacc.c
@@ -1028,8 +1028,8 @@  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);
@@ -1047,6 +1047,20 @@  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,
@@ -1061,6 +1075,7 @@  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;