[PATCH v2 4/6] drivers: soc: xilinx: Fix error message on SGI registration failure
From: Jay Buddhabhatti <hidden>
Date: 2023-10-04 09:43:10
Also in:
lkml
Subsystem:
the rest, xilinx event management driver · Maintainers:
Linus Torvalds, Michal Simek
Failure to register SGI for firmware event notification is non-fatal error when feature is not supported by other modules such as Xen and TF-A. Add _info level log message for such special case. Also add XST_PM_INVALID_VERSION error code and map it to -EOPNOSUPP Linux kernel error code. If feature is not supported or EEMI API version is mismatch, firmware can return XST_PM_INVALID_VERSION = 4 or XST_PM_NO_FEATURE = 19 error code. Co-developed-by: Tanmay Shah <redacted> Signed-off-by: Tanmay Shah <redacted> Signed-off-by: Jay Buddhabhatti <redacted> --- drivers/firmware/xilinx/zynqmp.c | 4 +++- drivers/soc/xilinx/xlnx_event_manager.c | 7 ++++++- include/linux/firmware/xlnx-zynqmp.h | 1 + 3 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 00ea2508f692..de09d77cf1e4 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c@@ -92,6 +92,8 @@ static int zynqmp_pm_ret_code(u32 ret_status) return 0; case XST_PM_NO_FEATURE: return -ENOTSUPP; + case XST_PM_INVALID_VERSION: + return -EOPNOTSUPP; case XST_PM_NO_ACCESS: return -EACCES; case XST_PM_ABORT_SUSPEND:
@@ -379,7 +381,7 @@ int zynqmp_pm_register_sgi(u32 sgi_num, u32 reset) ret = zynqmp_pm_invoke_fn(TF_A_PM_REGISTER_SGI, sgi_num, reset, 0, 0, 0, NULL); - if (!ret) + if (ret != -EOPNOTSUPP && !ret) return ret; /* try old implementation as fallback strategy if above fails */
diff --git a/drivers/soc/xilinx/xlnx_event_manager.c b/drivers/soc/xilinx/xlnx_event_manager.c
index 38cfc161a713..bfa5cf4a0cab 100644
--- a/drivers/soc/xilinx/xlnx_event_manager.c
+++ b/drivers/soc/xilinx/xlnx_event_manager.c@@ -653,7 +653,12 @@ static int xlnx_event_manager_probe(struct platform_device *pdev) ret = zynqmp_pm_register_sgi(sgi_num, 0); if (ret) { - dev_err(&pdev->dev, "SGI %d Registration over TF-A failed with %d\n", sgi_num, ret); + if (ret == -EOPNOTSUPP) + dev_info(&pdev->dev, "PM firmware event notification not supported\n"); + else + dev_err(&pdev->dev, "SGI %d registration failed, err %d\n", + sgi_num, ret); + xlnx_event_cleanup_sgi(pdev); return ret; }
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 86fb73269d95..4afd5d63177e 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h@@ -160,6 +160,7 @@ enum pm_api_id { /* PMU-FW return status codes */ enum pm_ret_status { XST_PM_SUCCESS = 0, + XST_PM_INVALID_VERSION = 4, XST_PM_NO_FEATURE = 19, XST_PM_INTERNAL = 2000, XST_PM_CONFLICT = 2001,
--
2.25.1
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