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 --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;