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ef60c9aa98
commit70c96dfac0upstream. As per code flow s3c_rtc_setfreq() will get called with rtc clock disabled and in set_freq we perform h/w registers read/write, which results in a kernel crash on exynos7 platform while probing rtc driver. Below is code flow: s3c_rtc_probe() clk_prepare_enable(info->rtc_clk) // rtc clock enabled s3c_rtc_gettime() // will enable clk if not done, and disable it upon exit s3c_rtc_setfreq() //then this will be called with clk disabled This patch take cares of such issue by adding s3c_rtc_{enable/disable}_clk in s3c_rtc_setfreq(). Fixes:24e1455493("drivers/rtc/rtc-s3c.c: delete duplicate clock control") Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by: Pankaj Dubey <pankaj.dubey@samsung.com> Tested-by: Pankaj Dubey <pankaj.dubey@samsung.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
842 lines
21 KiB
842 lines
21 KiB