From: Tony Lindgren <tony@atomide.com>
To: Daniel Lezcano <daniel.lezcano@linaro.org>,
Thomas Gleixner <tglx@linutronix.de>
Cc: Keerthy <j-keerthy@ti.com>,
linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Aaro Koskinen <aaro.koskinen@iki.fi>,
Adam Ford <aford173@gmail.com>,
Andreas Kemnade <andreas@kemnade.info>,
Lokesh Vutla <lokeshvutla@ti.com>,
Peter Ujfalusi <peter.ujfalusi@gmail.com>
Subject: [PATCH] clocksource/drivers/timer-ti-dm: Save and restore timer TIOCP_CFG
Date: Thu, 15 Apr 2021 11:55:06 +0300 [thread overview]
Message-ID: <20210415085506.56828-1-tony@atomide.com> (raw)
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>
---
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
--- 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
--- 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;
--
2.31.1
reply other threads:[~2021-04-15 8:55 UTC|newest]
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