linux-kernel - [PATCH 15/16] soc: imx: gpcv2: support reset defer probe

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Date:   Thu, 29 Apr 2021 15:30:49 +0800
From:   "Peng Fan (OSS)" <peng.fan@....nxp.com>
To:     robh+dt@...nel.org, shawnguo@...nel.org, s.hauer@...gutronix.de
Cc:     kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        p.zabel@...gutronix.de, l.stach@...gutronix.de, krzk@...nel.org,
        agx@...xcpu.org, marex@...x.de, andrew.smirnov@...il.com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, ping.bai@....com,
        frieder.schrempf@...tron.de, aford173@...il.com, abel.vesa@....com,
        Peng Fan <peng.fan@....com>
Subject: [PATCH 15/16] soc: imx: gpcv2: support reset defer probe

From: Peng Fan <peng.fan@....com>

When gpcv2 probe, the reset controller might not be ready, so we need
defer probe

Signed-off-by: Peng Fan <peng.fan@....com>
---
 drivers/soc/imx/gpcv2.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c
index 072f519462a5..49dd137f6b94 100644
--- a/drivers/soc/imx/gpcv2.c
+++ b/drivers/soc/imx/gpcv2.c
@@ -784,9 +784,12 @@ static int imx_pgc_domain_probe(struct platform_device *pdev)
 				     "Failed to get domain's clocks\n");
 
 	domain->reset = devm_reset_control_array_get_optional_exclusive(domain->dev);
-	if (IS_ERR(domain->reset))
+	if (IS_ERR(domain->reset)) {
+		if (PTR_ERR(domain->reset) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
 		return dev_err_probe(domain->dev, PTR_ERR(domain->reset),
 				     "Failed to get domain's resets\n");
+	}
 
 	pm_runtime_enable(domain->dev);
 
-- 
2.30.0