The following commit has been merged into the timers/core branch of tip:
Commit-ID: 753e83408b7f2980b7a5bfcf01f1175a937a2340
Gitweb: https://git.kernel.org/tip/753e83408b7f2980b7a5bfcf01f1175a937a2340
Author: Suman Anna <s-anna@xxxxxx>
AuthorDate: Wed, 12 Feb 2020 23:35:04 -06:00
Committer: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
CommitterDate: Thu, 27 Feb 2020 10:32:11 +01:00
clocksource/drivers/timer-ti-dm: Drop bogus omap_dm_timer_of_set_source()
The function omap_dm_timer_of_set_source() was originally added in
commit 31a7448f4fa8a ("ARM: OMAP: dmtimer: Add clock source from DT"),
and is designed to set a clock source from DT using the clocks property
of a timer node. This design choice is okay for clk provider nodes but
otherwise is a bad design as typically the clocks property is used to
specify the functional clocks for a device, and not its parents.
The timer nodes now all define a timer functional clock after the
conversion to ti-sysc and the new clkctrl layout, and this results
in an attempt to set the same functional clock as its parent when a
consumer driver attempts to acquire any of these timers in the
omap_dm_timer_prepare() function. This was masked and worked around
in commit 983a5a43ec25 ("clocksource: timer-ti-dm: Fix pwm dmtimer
usage of fck reparenting"). Fix all of this by simply dropping the
entire function.
Any DT configuration of clock sources should be achieved using
assigned-clocks and assigned-clock-parents properties provided
by the Common Clock Framework.
Cc: Tony Lindgren <tony@xxxxxxxxxxx>
Cc: Tero Kristo <t-kristo@xxxxxx>
Cc: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
Cc: H. Nikolaus Schaller <hns@xxxxxxxxxxxxx>
Cc: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
Cc: Keerthy <j-keerthy@xxxxxx>
Cc: Ladislav Michl <ladis@xxxxxxxxxxxxxx>
Cc: Pavel Machek <pavel@xxxxxx>
Cc: Sebastian Reichel <sre@xxxxxxxxxx>
Signed-off-by: Suman Anna <s-anna@xxxxxx>
Tested-by: Lokesh Vutla <lokeshvutla@xxxxxx>
Tested-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20200213053504.22638-1-s-anna@xxxxxx
---
drivers/clocksource/timer-ti-dm.c | 33 +------------------------------
1 file changed, 1 insertion(+), 32 deletions(-)
diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
index acc9360..6a0adb7 100644
--- a/drivers/clocksource/timer-ti-dm.c
+++ b/drivers/clocksource/timer-ti-dm.c
@@ -138,35 +138,6 @@ static int omap_dm_timer_reset(struct omap_dm_timer *timer)
return 0;
}
-static int omap_dm_timer_of_set_source(struct omap_dm_timer *timer)
-{
- int ret;
- struct clk *parent;
-
- /*
- * FIXME: OMAP1 devices do not use the clock framework for dmtimers so
- * do not call clk_get() for these devices.
- */
- if (!timer->fclk)
- return -ENODEV;
-
- parent = clk_get(&timer->pdev->dev, NULL);
- if (IS_ERR(parent))
- return -ENODEV;
-
- /* Bail out if both clocks point to fck */
- if (clk_is_match(parent, timer->fclk))
- return 0;
-
- ret = clk_set_parent(timer->fclk, parent);
- if (ret < 0)
- pr_err("%s: failed to set parent\n", __func__);
-
- clk_put(parent);
-
- return ret;
-}
-
static int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
{
int ret;
@@ -276,9 +247,7 @@ static int omap_dm_timer_prepare(struct omap_dm_timer *timer)
__omap_dm_timer_enable_posted(timer);
omap_dm_timer_disable(timer);
- rc = omap_dm_timer_of_set_source(timer);
- if (rc == -ENODEV)
- return omap_dm_timer_set_source(timer, OMAP_TIMER_SRC_32_KHZ);
+ rc = omap_dm_timer_set_source(timer, OMAP_TIMER_SRC_32_KHZ);
return rc;
}
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