i2c: i2c-ocores: DT bindings and minor fixes.
Cleanups to i2c-cores, no change in logic, changes are: * Move i2c-ocores device tree documentation from source file to Documentation/devicetree/bindings/i2c/i2c-ocores.txt. * Add \n to dev_warn and dev_err messages where missing * Minor updates to the text and formatting fixes. Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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@ -0,0 +1,27 @@
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Device tree configuration for i2c-ocores
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Required properties:
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- compatible : "opencores,i2c-ocores"
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- reg : bus address start and address range size of device
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- interrupts : interrupt number
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- regstep : size of device registers in bytes
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- clock-frequency : frequency of bus clock in Hz
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- #address-cells : should be <1>
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- #size-cells : should be <0>
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Example:
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i2c0: ocores@a0000000 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "opencores,i2c-ocores";
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reg = <0xa0000000 0x8>;
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interrupts = <10>;
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regstep = <1>;
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clock-frequency = <20000000>;
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dummy@60 {
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compatible = "dummy";
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reg = <0x60>;
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};
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};
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@ -10,40 +10,9 @@
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*/
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/*
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* Device tree configuration:
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*
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* Required properties:
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* - compatible : "opencores,i2c-ocores"
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* - reg : bus address start and address range size of device
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* - interrupts : interrupt number
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* - regstep : size of device registers in bytes
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* - clock-frequency : frequency of bus clock in Hz
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*
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* Example:
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*
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* i2c0: ocores@a0000000 {
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* compatible = "opencores,i2c-ocores";
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* reg = <0xa0000000 0x8>;
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* interrupts = <10>;
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*
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* regstep = <1>;
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* clock-frequency = <20000000>;
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*
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* -- Devices connected on this I2C bus get
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* -- defined here; address- and size-cells
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* -- apply to these child devices
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*
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* #address-cells = <1>;
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* #size-cells = <0>;
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*
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* dummy@60 {
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* compatible = "dummy";
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* reg = <60>;
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* };
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* };
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*
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* This driver can be used from the device tree, see
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* Documentation/devicetree/bindings/i2c/ocore-i2c.txt
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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@ -247,14 +216,14 @@ static struct i2c_adapter ocores_adapter = {
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};
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#ifdef CONFIG_OF
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static int ocores_i2c_of_probe(struct platform_device* pdev,
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struct ocores_i2c* i2c)
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static int ocores_i2c_of_probe(struct platform_device *pdev,
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struct ocores_i2c *i2c)
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{
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const __be32* val;
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val = of_get_property(pdev->dev.of_node, "regstep", NULL);
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if (!val) {
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dev_err(&pdev->dev, "Missing required parameter 'regstep'");
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dev_err(&pdev->dev, "Missing required parameter 'regstep'\n");
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return -ENODEV;
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}
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i2c->regstep = be32_to_cpup(val);
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@ -262,7 +231,7 @@ static int ocores_i2c_of_probe(struct platform_device* pdev,
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val = of_get_property(pdev->dev.of_node, "clock-frequency", NULL);
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if (!val) {
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dev_err(&pdev->dev,
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"Missing required parameter 'clock-frequency'");
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"Missing required parameter 'clock-frequency'\n");
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return -ENODEV;
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}
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i2c->clock_khz = be32_to_cpup(val) / 1000;
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@ -351,7 +320,7 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
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return 0;
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}
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static int __devexit ocores_i2c_remove(struct platform_device* pdev)
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static int __devexit ocores_i2c_remove(struct platform_device *pdev)
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{
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struct ocores_i2c *i2c = platform_get_drvdata(pdev);
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