[PATCH 5.13 366/800] clocksource/drivers/timer-ti-dm: Save and restore timer TIOCP_CFG
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-07-12 08:34:01
Also in:
lkml
Subsystem:
clocksource, clockevent drivers, the rest · Maintainers:
Daniel Lezcano, Thomas Gleixner, Linus Torvalds
From: Tony Lindgren <tony@atomide.com>
[ Upstream commit 9517c577f9f722270584cfb1a7b4e1354e408658 ]
As we are using cpu_pm to save and restore context, we must also save and
restore the timer sysconfig register TIOCP_CFG. This is needed because
we are not calling PM runtime functions at all with cpu_pm.
Fixes: b34677b0999a ("clocksource/drivers/timer-ti-dm: Implement cpu_pm notifier for context save and restore")
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Adam Ford <redacted>
Cc: Andreas Kemnade <andreas@kemnade.info>
Cc: Lokesh Vutla <redacted>
Cc: Peter Ujfalusi <redacted>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Daniel Lezcano <redacted>
Link: https://lore.kernel.org/r/20210415085506.56828-1-tony@atomide.com (local)
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/clocksource/timer-ti-dm.c | 6 ++++++
include/clocksource/timer-ti-dm.h | 1 +
2 files changed, 7 insertions(+)
diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
index 33eeabf9c3d1..e5c631f1b5cb 100644
--- a/drivers/clocksource/timer-ti-dm.c
+++ b/drivers/clocksource/timer-ti-dm.c@@ -78,6 +78,9 @@ static void omap_dm_timer_write_reg(struct omap_dm_timer *timer, u32 reg, static void omap_timer_restore_context(struct omap_dm_timer *timer) { + __omap_dm_timer_write(timer, OMAP_TIMER_OCP_CFG_OFFSET, + timer->context.ocp_cfg, 0); + omap_dm_timer_write_reg(timer, OMAP_TIMER_WAKEUP_EN_REG, timer->context.twer); omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG,
@@ -95,6 +98,9 @@ static void omap_timer_restore_context(struct omap_dm_timer *timer) static void omap_timer_save_context(struct omap_dm_timer *timer) { + timer->context.ocp_cfg = + __omap_dm_timer_read(timer, OMAP_TIMER_OCP_CFG_OFFSET, 0); + timer->context.tclr = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); timer->context.twer =
diff --git a/include/clocksource/timer-ti-dm.h b/include/clocksource/timer-ti-dm.h
index 4c61dade8835..f6da8a132639 100644
--- a/include/clocksource/timer-ti-dm.h
+++ b/include/clocksource/timer-ti-dm.h@@ -74,6 +74,7 @@ #define OMAP_TIMER_ERRATA_I103_I767 0x80000000 struct timer_regs { + u32 ocp_cfg; u32 tidr; u32 tier; u32 twer;
--
2.30.2