The patch: "timers: Introduce in-kernel alarm-timer interface" (sha1: ff3ead96d17f47ee70c294a5cc2cce9b61e82f0f) introduced new requirement that RTC drivers with alarm functionality can't be used as a module. When module is unloaded there is still a reference that's why rtc_device_release() is not called and ida is not freed.
That's why when module is loaded again it can't use the same RTC number based on aliases. Log: sh-4.3# modprobe rtc-zynqmp [ 42.468565] rtc_zynqmp ffa60000.rtc: rtc core: registered ffa60000.rtc as rtc5 sh-4.3# rmmod rtc-zynqmp sh-4.3# modprobe rtc-zynqmp [ 48.648222] rtc_zynqmp ffa60000.rtc: /aliases ID 5 not available [ 48.654280] rtc_zynqmp ffa60000.rtc: rtc core: registered ffa60000.rtc as rtc0 This patch is removing module support which is just a workaround till alarm-timer interface is fixed to support device releasing when alarm timer is not used. Signed-off-by: Michal Simek <[email protected]> --- Based on discussion: https://www.mail-archive.com/[email protected]/msg00908.html --- drivers/rtc/Kconfig | 2 +- drivers/rtc/rtc-zynqmp.c | 15 +-------------- 2 files changed, 2 insertions(+), 15 deletions(-) diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 72419ac2c52a..a2bbe7c2cf92 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -1225,7 +1225,7 @@ config RTC_DRV_OPAL will be called rtc-opal. config RTC_DRV_ZYNQMP - tristate "Xilinx Zynq Ultrascale+ MPSoC RTC" + bool "Xilinx Zynq Ultrascale+ MPSoC RTC" depends on OF help If you say yes here you get support for the RTC controller found on diff --git a/drivers/rtc/rtc-zynqmp.c b/drivers/rtc/rtc-zynqmp.c index da18a8ae3c1d..5fc50145dbd2 100644 --- a/drivers/rtc/rtc-zynqmp.c +++ b/drivers/rtc/rtc-zynqmp.c @@ -268,14 +268,6 @@ static int xlnx_rtc_probe(struct platform_device *pdev) return PTR_ERR_OR_ZERO(xrtcdev->rtc); } -static int xlnx_rtc_remove(struct platform_device *pdev) -{ - xlnx_rtc_alarm_irq_enable(&pdev->dev, 0); - device_init_wakeup(&pdev->dev, 0); - - return 0; -} - static int __maybe_unused xlnx_rtc_suspend(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); @@ -312,7 +304,6 @@ static int __maybe_unused xlnx_rtc_resume(struct device *dev) static struct platform_driver xlnx_rtc_driver = { .probe = xlnx_rtc_probe, - .remove = xlnx_rtc_remove, .driver = { .name = KBUILD_MODNAME, .pm = &xlnx_rtc_pm_ops, @@ -320,8 +311,4 @@ static int __maybe_unused xlnx_rtc_resume(struct device *dev) }, }; -module_platform_driver(xlnx_rtc_driver); - -MODULE_DESCRIPTION("Xilinx Zynq MPSoC RTC driver"); -MODULE_AUTHOR("Xilinx Inc."); -MODULE_LICENSE("GPL v2"); +builtin_platform_driver(xlnx_rtc_driver); -- 1.9.1
