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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: Doug Anderson <dianders@chromium.org> Tested-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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2 changed files with 15 additions and 3 deletions
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@ -15,7 +15,7 @@ Required properties:
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Must be "samsung,exynos-adc-v2" for
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future controllers.
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- reg: Contains ADC register address range (base address and
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length).
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length) and the address of the phy enable register.
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- interrupts: Contains the interrupt information for the timer. The
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format is being dependent on which interrupt controller
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the Samsung device uses.
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@ -27,7 +27,7 @@ Example: adding device info in dtsi file
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adc: adc@12D10000 {
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compatible = "samsung,exynos-adc-v1";
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reg = <0x12D10000 0x100>;
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reg = <0x12D10000 0x100>, <0x10040718 0x4>;
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interrupts = <0 106 0>;
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#io-channel-cells = <1>;
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io-channel-ranges;
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@ -85,6 +85,7 @@ enum adc_version {
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struct exynos_adc {
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void __iomem *regs;
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void __iomem *enable_reg;
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struct clk *clk;
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unsigned int irq;
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struct regulator *vdd;
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@ -269,13 +270,19 @@ static int exynos_adc_probe(struct platform_device *pdev)
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info = iio_priv(indio_dev);
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mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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info->regs = devm_request_and_ioremap(&pdev->dev, mem);
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if (!info->regs) {
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ret = -ENOMEM;
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goto err_iio;
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}
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mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
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info->enable_reg = devm_request_and_ioremap(&pdev->dev, mem);
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if (!info->enable_reg) {
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ret = -ENOMEM;
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goto err_iio;
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}
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irq = platform_get_irq(pdev, 0);
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if (irq < 0) {
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dev_err(&pdev->dev, "no irq resource?\n");
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@ -295,6 +302,8 @@ static int exynos_adc_probe(struct platform_device *pdev)
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goto err_iio;
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}
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writel(1, info->enable_reg);
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info->clk = devm_clk_get(&pdev->dev, "adc");
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if (IS_ERR(info->clk)) {
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dev_err(&pdev->dev, "failed getting clock, err = %ld\n",
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@ -370,6 +379,7 @@ static int exynos_adc_remove(struct platform_device *pdev)
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exynos_adc_remove_devices);
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regulator_disable(info->vdd);
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clk_disable_unprepare(info->clk);
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writel(0, info->enable_reg);
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iio_device_unregister(indio_dev);
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free_irq(info->irq, info);
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iio_device_free(indio_dev);
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@ -395,6 +405,7 @@ static int exynos_adc_suspend(struct device *dev)
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}
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clk_disable_unprepare(info->clk);
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writel(0, info->enable_reg);
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regulator_disable(info->vdd);
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return 0;
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@ -410,6 +421,7 @@ static int exynos_adc_resume(struct device *dev)
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if (ret)
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return ret;
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writel(1, info->enable_reg);
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clk_prepare_enable(info->clk);
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exynos_adc_hw_init(info);
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