Hello Chanwoo,
On Thu, Aug 28, 2014 at 11:02 AM, Chanwoo Choi <cw00.c...@samsung.com> wrote:
> This patch add support for RTC of Exynos3250 SoC. The Exynos3250 needs source
> clock(32.768KHz) for RTC block. If source clock of RTC is registerd on clock
> list of common clk framework, Exynos RTC drvier have to control this clock.
>
> Clock list for s3c-rtc device:
> - rtc : CLK_RTC of CLK_GATE_IP_PERIR is gate clock for RTC.
> - rtc_src : XrtcXTI is 32.768.kHz source clock for RTC.
Is this RTC source clock needed for all Exynos SoCs?
> @@ -480,11 +530,19 @@ static int s3c_rtc_probe(struct platform_device *pdev)
>
> info->rtc_clk = devm_clk_get(&pdev->dev, "rtc");
> if (IS_ERR(info->rtc_clk)) {
> - dev_err(&pdev->dev, "failed to find rtc clock source\n");
> + dev_err(&pdev->dev, "failed to find rtc clock\n");
> return PTR_ERR(info->rtc_clk);
> }
> clk_prepare_enable(info->rtc_clk);
>
> + info->rtc_src_clk = devm_clk_get(&pdev->dev, "rtc_src");
> + if (IS_ERR(info->rtc_src_clk)) {
> + dev_err(&pdev->dev, "failed to find rtc source clock\n");
> + return PTR_ERR(info->rtc_src_clk);
On an Exynos5420 Peach Pit machine I'm having the following error and
the driver fails to probe:
[ 2.095700] s3c-rtc: probe of 101e0000.rtc failed with error -2
Reverting this patch fixes the issue and the s3c RTC works again on
this machine.
Best regards,
Javier
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