3 Commits

Author	SHA1	Message	Date
Shubhi Garg	b60b757d9c	rtc: fix year calculation in max77851 pmic rtc ... Add +100 to year only if PMIC does not have separate alarm enable registers. Since MAX77851 has separate alarm enable register , MAX77851 RTC supports year calculation from 0..199 so we do not need to add 100 on reading RTC YEAR register. Currently, default, driver is adding +100 which is wrong. This change fixes rtc year calculation. Bug 200749982 Change-Id: Ibaf1d2fb81e59cc21c22d509cf9ffc7b6005916c Signed-off-by: Shubhi Garg <shgarg@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-5.10/+/2727859 (cherry picked from commit b43364942c67fdf7958a42bfad5fe02725da00e3) Reviewed-on: https://git-master.nvidia.com/r/c/linux-5.10/+/2728926 Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2947785 Reviewed-by: svcacv <svcacv@nvidia.com> Reviewed-by: Bitan Biswas <bbiswas@nvidia.com> Tested-by: Bitan Biswas <bbiswas@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>	2023-09-14 13:25:47 -07:00
Shubhi Garg	5b1a5fc4b6	rtc: fix max77851 pmic rtc hang in set time ... When we set time from max77851 pmic RTC, it hangs because it calls read_time function which locks via mutex twice. System goes in deadlock state. Reading time is not required during time set as it is not performing anything thus removing it. Following logs are seen during hang: [ 242.930292] INFO: task systemd-timedat:1127 blocked for more than 120 seconds. [ 242.937695] Tainted: G E 5.10.104-tegra #1 [ 242.943743] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 242.951643] task:systemd-timedat state:D stack: 0 pid: 1127 ppid: 1 flags:0x00000808 [ 242.960074] Call trace: [ 242.962618] __switch_to+0xd0/0x120 [ 242.966193] __schedule+0x404/0xab0 [ 242.969709] schedule+0x78/0x110 [ 242.972963] schedule_preempt_disabled+0x2c/0x50 [ 242.977621] __mutex_lock.isra.0+0x1b4/0x5b0 [ 242.981925] __mutex_lock_slowpath+0x48/0x90 [ 242.986226] mutex_lock+0x74/0x80 [ 242.989610] max77851_rtc_read_time+0x48/0xf0 [ 242.994004] max77851_rtc_set_time+0xd4/0x1a0 [ 242.998398] rtc_set_time+0xac/0x220 [ 243.002003] rtc_dev_ioctl+0x478/0x950 [ 243.005805] __arm64_sys_ioctl+0xac/0xf0 [ 243.009773] el0_svc_common.constprop.0+0x80/0x1d0 [ 243.014605] do_el0_svc+0x38/0xb0 [ 243.017950] el0_svc+0x1c/0x30 [ 243.021029] el0_sync_handler+0xa8/0xb0 [ 243.024898] el0_sync+0x16c/0x180 Bug 200749982 Change-Id: I6f7d88871184bf64a03fa789746a189e0c0aa826 Signed-off-by: Shubhi Garg <shgarg@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-5.10/+/2726550 (cherry picked from commit 129e9c03af0db8857d65e65ea72ce19ae2656b27) Reviewed-on: https://git-master.nvidia.com/r/c/linux-5.10/+/2728925 Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2947784 Tested-by: Bitan Biswas <bbiswas@nvidia.com> Reviewed-by: Bitan Biswas <bbiswas@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>	2023-09-14 13:25:42 -07:00
Shubhi Garg	da71dfa5a5	rtc: max77851: add max77851 rtc driver ... Add max77851 rtc driver into nvidia-oot repo Fix jammy-src kernel-only build max77851 rtc in embedded recovery defconfig - guard regmap function calls with CONFIG_REGMAP_IRQ - guard i2c call with CONFIG_I2C Bug 200749982 Change-Id: I9bfcbfa7bab42f393c7baa1f3dba78d599ca510a Signed-off-by: Shubhi Garg <shgarg@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-5.10/+/2595387 Signed-off-by: Bitan Biswas <bbiswas@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2947783 GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>	2023-09-14 13:25:37 -07:00