i2c: Tegra: Add DeviceTree support
This patch modifies the tegra i2c driver so that it can be initiailized using the device tree along with the devices connected to the i2c bus. Signed-off-by: John Bonesio <bones@secretlab.ca> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: OIof Johansson <olof@lixom.net> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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@ -26,6 +26,7 @@
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#include <linux/delay.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/slab.h>
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#include <linux/i2c-tegra.h>
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#include <linux/i2c-tegra.h>
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#include <linux/of_i2c.h>
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#include <asm/unaligned.h>
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#include <asm/unaligned.h>
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@ -546,6 +547,7 @@ static int tegra_i2c_probe(struct platform_device *pdev)
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struct resource *iomem;
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struct resource *iomem;
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struct clk *clk;
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struct clk *clk;
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struct clk *i2c_clk;
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struct clk *i2c_clk;
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const unsigned int *prop;
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void *base;
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void *base;
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int irq;
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int irq;
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int ret = 0;
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int ret = 0;
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@ -603,7 +605,17 @@ static int tegra_i2c_probe(struct platform_device *pdev)
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i2c_dev->irq = irq;
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i2c_dev->irq = irq;
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i2c_dev->cont_id = pdev->id;
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i2c_dev->cont_id = pdev->id;
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i2c_dev->dev = &pdev->dev;
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i2c_dev->dev = &pdev->dev;
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i2c_dev->bus_clk_rate = pdata ? pdata->bus_clk_rate : 100000;
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i2c_dev->bus_clk_rate = 100000; /* default clock rate */
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if (pdata) {
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i2c_dev->bus_clk_rate = pdata->bus_clk_rate;
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} else if (i2c_dev->dev->of_node) { /* if there is a device tree node ... */
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prop = of_get_property(i2c_dev->dev->of_node,
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"clock-frequency", NULL);
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if (prop)
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i2c_dev->bus_clk_rate = be32_to_cpup(prop);
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}
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if (pdev->id == 3)
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if (pdev->id == 3)
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i2c_dev->is_dvc = 1;
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i2c_dev->is_dvc = 1;
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@ -633,6 +645,7 @@ static int tegra_i2c_probe(struct platform_device *pdev)
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i2c_dev->adapter.algo = &tegra_i2c_algo;
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i2c_dev->adapter.algo = &tegra_i2c_algo;
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i2c_dev->adapter.dev.parent = &pdev->dev;
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i2c_dev->adapter.dev.parent = &pdev->dev;
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i2c_dev->adapter.nr = pdev->id;
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i2c_dev->adapter.nr = pdev->id;
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i2c_dev->adapter.dev.of_node = pdev->dev.of_node;
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ret = i2c_add_numbered_adapter(&i2c_dev->adapter);
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ret = i2c_add_numbered_adapter(&i2c_dev->adapter);
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if (ret) {
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if (ret) {
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@ -640,6 +653,8 @@ static int tegra_i2c_probe(struct platform_device *pdev)
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goto err_free_irq;
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goto err_free_irq;
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}
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}
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of_i2c_register_devices(&i2c_dev->adapter);
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return 0;
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return 0;
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err_free_irq:
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err_free_irq:
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free_irq(i2c_dev->irq, i2c_dev);
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free_irq(i2c_dev->irq, i2c_dev);
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