linux-kernel - [PATCH 2/2] spi: bcm63xx-hsspi: fix pm

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Date:   Tue, 23 Feb 2021 16:18:51 +0100
From:   Álvaro Fernández Rojas 
        <noltari@...il.com>
To:     jonas.gorski@...il.com, Mark Brown <broonie@...nel.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        bcm-kernel-feedback-list@...adcom.com, linux-spi@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Álvaro Fernández Rojas 
        <noltari@...il.com>
Subject: [PATCH 2/2] spi: bcm63xx-hsspi: fix pm_runtime

The driver sets auto_runtime_pm to true, but it doesn't call
pm_runtime_enable(), which results in "Failed to power device" when PM support
is enabled.

Signed-off-by: Álvaro Fernández Rojas <noltari@...il.com>
---
 drivers/spi/spi-bcm63xx-hsspi.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-bcm63xx-hsspi.c b/drivers/spi/spi-bcm63xx-hsspi.c
index 1f08d7553f07..b871fd810d80 100644
--- a/drivers/spi/spi-bcm63xx-hsspi.c
+++ b/drivers/spi/spi-bcm63xx-hsspi.c
@@ -21,6 +21,7 @@
 #include <linux/mutex.h>
 #include <linux/of.h>
 #include <linux/reset.h>
+#include <linux/pm_runtime.h>
 
 #define HSSPI_GLOBAL_CTRL_REG			0x0
 #define GLOBAL_CTRL_CS_POLARITY_SHIFT		0
@@ -439,13 +440,17 @@ static int bcm63xx_hsspi_probe(struct platform_device *pdev)
 	if (ret)
 		goto out_put_master;
 
+	pm_runtime_enable(&pdev->dev);
+
 	/* register and we are done */
 	ret = devm_spi_register_master(dev, master);
 	if (ret)
-		goto out_put_master;
+		goto out_pm_disable;
 
 	return 0;
 
+out_pm_disable:
+	pm_runtime_disable(&pdev->dev);
 out_put_master:
 	spi_master_put(master);
 out_disable_pll_clk:
-- 
2.20.1