Commit bb916ebb authored by Doug Anderson's avatar Doug Anderson Committed by Jonathan Cameron
Browse files

iio: adc: Add dt support for turning on the phy in exynos-adc 



Without this change the exynos adc controller needed to have its phy
enabled in some out-of-driver C code.  Add support for specifying the
phy enable register by listing it in the reg list.

Signed-off-by: default avatarDoug Anderson <dianders@chromium.org>
Tested-by: default avatarNaveen Krishna Chatradhi <ch.naveen@samsung.com>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent f2f7a449

Documentation/devicetree/bindings/arm/samsung/exynos-adc.txt

+2 −2
Original line number Diff line number Diff line
@@ -15,7 +15,7 @@ Required properties: 
			Must be "samsung,exynos-adc-v2" for

				future controllers.

- reg:			Contains ADC register address range (base address and

			length).

			length) and the address of the phy enable register.

- interrupts: 		Contains the interrupt information for the timer. The

			format is being dependent on which interrupt controller

			the Samsung device uses.
@@ -27,7 +27,7 @@ Example: adding device info in dtsi file 


adc: adc@12D10000 {

	compatible = "samsung,exynos-adc-v1";

	reg = <0x12D10000 0x100>;

	reg = <0x12D10000 0x100>, <0x10040718 0x4>;

	interrupts = <0 106 0>;

	#io-channel-cells = <1>;

	io-channel-ranges;

drivers/iio/adc/exynos_adc.c

+13 −1
Original line number Diff line number Diff line
@@ -85,6 +85,7 @@ enum adc_version { 


struct exynos_adc {

	void __iomem		*regs;

	void __iomem		*enable_reg;

	struct clk		*clk;

	unsigned int		irq;

	struct regulator	*vdd;
@@ -269,13 +270,19 @@ static int exynos_adc_probe(struct platform_device *pdev) 
	info = iio_priv(indio_dev);



	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);



	info->regs = devm_request_and_ioremap(&pdev->dev, mem);

	if (!info->regs) {

		ret = -ENOMEM;

		goto err_iio;

	}



	mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);

	info->enable_reg = devm_request_and_ioremap(&pdev->dev, mem);

	if (!info->enable_reg) {

		ret = -ENOMEM;

		goto err_iio;

	}



	irq = platform_get_irq(pdev, 0);

	if (irq < 0) {

		dev_err(&pdev->dev, "no irq resource?\n");
@@ -295,6 +302,8 @@ static int exynos_adc_probe(struct platform_device *pdev) 
		goto err_iio;

	}



	writel(1, info->enable_reg);



	info->clk = devm_clk_get(&pdev->dev, "adc");

	if (IS_ERR(info->clk)) {

		dev_err(&pdev->dev, "failed getting clock, err = %ld\n",
@@ -370,6 +379,7 @@ static int exynos_adc_remove(struct platform_device *pdev) 
				exynos_adc_remove_devices);

	regulator_disable(info->vdd);

	clk_disable_unprepare(info->clk);

	writel(0, info->enable_reg);

	iio_device_unregister(indio_dev);

	free_irq(info->irq, info);

	iio_device_free(indio_dev);
@@ -395,6 +405,7 @@ static int exynos_adc_suspend(struct device *dev) 
	}



	clk_disable_unprepare(info->clk);

	writel(0, info->enable_reg);

	regulator_disable(info->vdd);



	return 0;
@@ -410,6 +421,7 @@ static int exynos_adc_resume(struct device *dev) 
	if (ret)

		return ret;



	writel(1, info->enable_reg);

	clk_prepare_enable(info->clk);



	exynos_adc_hw_init(info);

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