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i2c: rcar: make sure clocks are on when doing clock calculation 

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@renesas.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Wolfram Sang 2015-11-19 16:56:41 +01:00 committed by Wolfram Sang
parent 31ade3b83e
commit e43e0df13f
1 changed files with 17 additions and 9 deletions
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26
drivers/i2c/busses/i2c-rcar.c
View File

@ -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)