[PATCH 1/3] rtc: gemini: Add optional clock handling
Hans Ulli Kroll
ulli.kroll at googlemail.com
Fri May 19 11:11:31 PDT 2017
Hi Linus,
On Thu, 18 May 2017, Linus Walleij wrote:
> 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.
>
> Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
> ---
> drivers/rtc/rtc-gemini.c | 28 ++++++++++++++++++++++++++++
> 1 file changed, 28 insertions(+)
>
> diff --git a/drivers/rtc/rtc-gemini.c b/drivers/rtc/rtc-gemini.c
> index 5279390bb42d..d69a35aa80e7 100644
> --- a/drivers/rtc/rtc-gemini.c
> +++ b/drivers/rtc/rtc-gemini.c
> @@ -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 = 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 = 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;
> --
> 2.9.3
>
>
Acked-by: Hans Ulli Kroll <ulli.kroll at googlemail.com>
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