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Commit ac05fba3 authored by Linus Walleij's avatar Linus Walleij Committed by Alexandre Belloni
Browse files

rtc: gemini: Add optional clock handling 



This makes the Gemini optionally take two clock references to
the PCLK and EXTCLK. As we are adding a clock framework to the
Gemini platform we need to make sure that we get the right
references.

Acked-by: default avatarHans Ulli Kroll <ulli.kroll@googlemail.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@free-electrons.com>
parent e48585de

drivers/rtc/rtc-gemini.c

+28 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
#include <linux/platform_device.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/clk.h>



#define DRV_NAME        "rtc-gemini"
@@ -38,6 +39,8 @@ struct gemini_rtc { 
	struct rtc_device	*rtc_dev;

	void __iomem		*rtc_base;

	int			rtc_irq;

	struct clk		*pclk;

	struct clk		*extclk;

};



enum gemini_rtc_offsets {
@@ -127,6 +130,27 @@ static int gemini_rtc_probe(struct platform_device *pdev) 
		return -ENOMEM;

	platform_set_drvdata(pdev, rtc);



	rtc->pclk = devm_clk_get(dev, "PCLK");

	if (IS_ERR(rtc->pclk)) {

		dev_err(dev, "could not get PCLK\n");

	} else {

		ret = clk_prepare_enable(rtc->pclk);

		if (ret) {

			dev_err(dev, "failed to enable PCLK\n");

			return ret;

		}

	}

	rtc->extclk = devm_clk_get(dev, "EXTCLK");

	if (IS_ERR(rtc->extclk)) {

		dev_err(dev, "could not get EXTCLK\n");

	} else {

		ret = clk_prepare_enable(rtc->extclk);

		if (ret) {

			dev_err(dev, "failed to enable EXTCLK\n");

			return ret;

		}

	}



	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);

	if (!res)

		return -ENODEV;
@@ -156,6 +180,10 @@ static int gemini_rtc_remove(struct platform_device *pdev) 
{

	struct gemini_rtc *rtc = platform_get_drvdata(pdev);



	if (!IS_ERR(rtc->extclk))

		clk_disable_unprepare(rtc->extclk);

	if (!IS_ERR(rtc->pclk))

		clk_disable_unprepare(rtc->pclk);

	rtc_device_unregister(rtc->rtc_dev);



	return 0;