forked from Minki/linux
clk: max77686: Register OF clock provider
If max77686 chip is instantiated from device tree, it is desirable to have an OF clock provider to allow device tree based look-up of clocks. This patch adds OF clock provider registration to the clk-max77686 driver. Signed-off-by: Tomasz Figa <t.figa@samsung.com> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
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Documentation/devicetree/bindings/clock/maxim,max77686.txt
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38
Documentation/devicetree/bindings/clock/maxim,max77686.txt
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@ -0,0 +1,38 @@
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Binding for Maxim MAX77686 32k clock generator block
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This is a part of device tree bindings of MAX77686 multi-function device.
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More information can be found in bindings/mfd/max77686.txt file.
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The MAX77686 contains three 32.768khz clock outputs that can be controlled
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(gated/ungated) over I2C.
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Following properties should be presend in main device node of the MFD chip.
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Required properties:
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- #clock-cells: simple one-cell clock specifier format is used, where the
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only cell is used as an index of the clock inside the provider. Following
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indices are allowed:
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- 0: 32khz_ap clock,
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- 1: 32khz_cp clock,
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- 2: 32khz_pmic clock.
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Example: Node of the MFD chip
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max77686: max77686@09 {
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compatible = "maxim,max77686";
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interrupt-parent = <&wakeup_eint>;
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interrupts = <26 0>;
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reg = <0x09>;
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#clock-cells = <1>;
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/* ... */
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};
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Example: Clock consumer node
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foo@0 {
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compatible = "bar,foo";
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/* ... */
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clock-names = "my-clock";
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clocks = <&max77686 2>;
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};
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@ -7,6 +7,9 @@ different i2c slave address,presently for which we are statically creating i2c
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client while probing.This document describes the binding for mfd device and
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PMIC submodule.
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Binding for the built-in 32k clock generator block is defined separately
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in bindings/clk/maxim,max77686.txt file.
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Required properties:
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- compatible : Must be "maxim,max77686";
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- reg : Specifies the i2c slave address of PMIC block.
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@ -169,6 +169,26 @@ static int max77686_clk_probe(struct platform_device *pdev)
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platform_set_drvdata(pdev, clocks);
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if (iodev->dev->of_node) {
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struct clk_onecell_data *of_data;
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of_data = devm_kzalloc(&pdev->dev,
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sizeof(*of_data), GFP_KERNEL);
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if (!of_data) {
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ret = -ENOMEM;
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goto err_clocks;
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}
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of_data->clks = clocks;
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of_data->clk_num = MAX77686_CLKS_NUM;
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ret = of_clk_add_provider(iodev->dev->of_node,
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of_clk_src_onecell_get, of_data);
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if (ret) {
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dev_err(&pdev->dev, "failed to register OF clock provider\n");
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goto err_clocks;
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}
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}
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return 0;
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err_clocks:
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@ -182,9 +202,13 @@ err_clocks:
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static int max77686_clk_remove(struct platform_device *pdev)
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{
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struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
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struct clk **clocks = platform_get_drvdata(pdev);
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int i;
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if (iodev->dev->of_node)
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of_clk_del_provider(iodev->dev->of_node);
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for (i = 0; i < MAX77686_CLKS_NUM; i++) {
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struct clk_hw *hw = __clk_get_hw(clocks[i]);
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struct max77686_clk *max77686 = to_max77686_clk(hw);
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