[PATCH 3/3] drivers: remoteproc: add Versal and Versal-NET support

Tanmay Shah
2024-03-15T21:16:18Z

AMD-Xilinx Versal and Versal-NET are successor of ZynqMP platform. ZynqMP
remoteproc driver is mostly compatible with new platforms except few
platform specific differences.

Versal has same IP of cortex-R5 cores hence maintained compatible string
same as ZynqMP platform. However, hardcode TCM addresses are not
supported for new platforms and must be provided in device-tree as per
new bindings. This makes TCM representation data-driven and easy to
maintain. This check is provided in the driver.

For Versal-NET platform, TCM doesn't need to be configured in lockstep
mode or split mode. Hence that call to PMC firmware is avoided in the
driver for Versal-NET platform.

Signed-off-by: Tanmay Shah <tanmay.shah@amd.com>
---
drivers/remoteproc/xlnx_r5_remoteproc.c | 19 +++++++++++++++----
1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/drivers/remoteproc/xlnx_r5_remoteproc.c b/drivers/remoteproc/xlnx_r5_remoteproc.c
index d4a22caebaad..193bc159d1b4 100644
--- a/drivers/remoteproc/xlnx_r5_remoteproc.c
+++ b/drivers/remoteproc/xlnx_r5_remoteproc.c
@@ -323,9 +323,12 @@ static int zynqmp_r5_set_mode(struct zynqmp_r5_core *r5_core,
return ret;
}

- ret = zynqmp_pm_set_tcm_config(r5_core->pm_domain_id, tcm_mode);
- if (ret < 0)
- dev_err(r5_core->dev, "failed to configure TCM\n");
+ /* TCM configuration is not needed in versal-net */
+ if (device_is_compatible(r5_core->dev, "xlnx,zynqmp-r5f")) {
+ ret = zynqmp_pm_set_tcm_config(r5_core->pm_domain_id, tcm_mode);
+ if (ret < 0)
+ dev_err(r5_core->dev, "failed to configure TCM\n");
+ }

return ret;
}
@@ -933,10 +936,17 @@ static int zynqmp_r5_core_init(struct zynqmp_r5_cluster *cluster,
int ret, i;

r5_core = cluster->r5_cores[0];
+
+ /*
+ * New platforms must use device tree for TCM parsing.
+ * Only ZynqMP uses hardcode TCM.
+ */
if (of_find_property(r5_core->np, "reg", NULL))
ret = zynqmp_r5_get_tcm_node_from_dt(cluster);
- else
+ else if (of_machine_is_compatible("xlnx,zynqmp"))
ret = zynqmp_r5_get_tcm_node(cluster);
+ else
+ ret = -EINVAL;

if (ret) {
dev_err(dev, "can't get tcm, err %d\n", ret);
@@ -1198,6 +1208,7 @@ static int zynqmp_r5_remoteproc_probe(struct platform_device *pdev)
/* Match table for OF platform binding */
static const struct of_device_id zynqmp_r5_remoteproc_match[] = {
{ .compatible = "xlnx,zynqmp-r5fss", },
+ { .compatible = "xlnx,versal-net-r52fss", },
{ /* end of list */ },
};
MODULE_DEVICE_TABLE(of, zynqmp_r5_remoteproc_match);
--
2.25.1