clocksource/drivers/timer-ti-dm: Save and restore timer TIOCP_CFG

[ 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 <aford173@gmail.com>
Cc: Andreas Kemnade <andreas@kemnade.info>
Cc: Lokesh Vutla <lokeshvutla@ti.com>
Cc: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210415085506.56828-1-tony@atomide.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
index 33eeabf..e5c631f 100644 (file)
--- 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 4c61dad..f6da8a1 100644 (file)
--- 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;