From: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
When calculating the bus speed, the clock should be on, of course. Most
bootloaders left them on, so this went unnoticed so far.
Move the ioremapping out of this clock-enabled-block and prepare for
adding hw initialization there, too.
Reported-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
---
drivers/i2c/busses/i2c-rcar.c | 26 +++++++++++++++++---------
1 file changed, 17 insertions(+), 9 deletions(-)
diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c
index b0ae560b38c308..dac0f5d1945341 100644
--- a/drivers/i2c/busses/i2c-rcar.c
+++ b/drivers/i2c/busses/i2c-rcar.c
@@ -650,19 +650,23 @@ static int rcar_i2c_probe(struct platform_device *pdev)
return PTR_ERR(priv->clk);
}
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ priv->io = devm_ioremap_resource(dev, res);
+ if (IS_ERR(priv->io))
+ return PTR_ERR(priv->io);
+
bus_speed = 100000; /* default 100 kHz */
of_property_read_u32(dev->of_node, "clock-frequency", &bus_speed);
priv->devtype = (enum rcar_i2c_type)of_match_device(rcar_i2c_dt_ids, dev)->data;
+ pm_runtime_enable(dev);
+ pm_runtime_get_sync(dev);
ret = rcar_i2c_clock_calculate(priv, bus_speed, dev);
if (ret < 0)
- return ret;
+ goto out_pm_put;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- priv->io = devm_ioremap_resource(dev, res);
- if (IS_ERR(priv->io))
- return PTR_ERR(priv->io);
+ pm_runtime_put(dev);
irq = platform_get_irq(pdev, 0);
init_waitqueue_head(&priv->wait);
@@ -682,22 +686,26 @@ static int rcar_i2c_probe(struct platform_device *pdev)
dev_name(dev), priv);
if (ret < 0) {
dev_err(dev, "cannot get irq %d\n", irq);
- return ret;
+ goto out_pm_disable;
}
- pm_runtime_enable(dev);
platform_set_drvdata(pdev, priv);
ret = i2c_add_numbered_adapter(adap);
if (ret < 0) {
dev_err(dev, "reg adap failed: %d\n", ret);
- pm_runtime_disable(dev);
- return ret;
+ goto out_pm_disable;
}
dev_info(dev, "probed\n");
return 0;
+
+ out_pm_put:
+ pm_runtime_put(dev);
+ out_pm_disable:
+ pm_runtime_disable(dev);
+ return ret;
}
static int rcar_i2c_remove(struct platform_device *pdev)
--
2.1.4
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