From 12ce2f1b43c4033b4be346f5f69d11dd7e5c78b3 Mon Sep 17 00:00:00 2001
From: Fugang Duan <fugang.duan@nxp.com>
Date: Wed, 20 Mar 2019 15:06:58 +0800
Subject: [PATCH] MLK-21194 rpmsg: imx_rpmsg: clear pending partition reboot
irq status
Clear pending interrupt status of partition reboot during rpmsg
driver probe to avoid to unregister/register virtio device again.
Tested-by: Clark Wang <xiaoning.wang@nxp.com>
Reviewed-by: Richard Zhu <hongxing.zhu@nxp.com>
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
---
drivers/rpmsg/imx_rpmsg.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/rpmsg/imx_rpmsg.c b/drivers/rpmsg/imx_rpmsg.c
index fab8b6ba257d6a..e8878967b6cc48 100644
--- a/drivers/rpmsg/imx_rpmsg.c
+++ b/drivers/rpmsg/imx_rpmsg.c
@@ -694,6 +694,8 @@ static int imx_rpmsg_probe(struct platform_device *pdev)
uint32_t mu_id;
sc_err_t sciErr;
static sc_ipc_t mu_ipchandle;
+ uint32_t irq_status;
+
/* Get muB partition id and enable irq in SCFW then */
if (of_property_read_u32(np, "mub-partition",
&rpdev->mub_partition))
@@ -712,6 +714,15 @@ static int imx_rpmsg_probe(struct platform_device *pdev)
return sciErr;
};
+ /* Clear any pending partition reset interrupt during
+ * rpmsg probe.
+ */
+ sciErr = sc_irq_status(mu_ipchandle, SC_R_MU_1A,
+ SC_IRQ_GROUP_REBOOTED,
+ &irq_status);
+ if (sciErr != SC_ERR_NONE)
+ pr_info("Cannot get partition reboot interrupt status\n");
+
/* Request for the partition reset interrupt. */
sciErr = sc_irq_enable(mu_ipchandle, SC_R_MU_1A,
SC_IRQ_GROUP_REBOOTED,
--
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