[tip: timers/core] clocksource/drivers/timer-npcm7xx: Enable timer 1 clock before use

[tip-bot2 for Jonathan Neuschäfer]

The following commit has been merged into the timers/core branch of tip:

Commit-ID:     db78539fc95cf62b0b8f274368fcd8202eac91f9
Gitweb:        https://git.kernel.org/tip/db78539fc95cf62b0b8f274368fcd8202eac91f9
Author:        Jonathan Neuschäfer <j.neuschaefer@xxxxxxx>
AuthorDate:    Fri, 04 Nov 2022 17:18:46 +01:00
Committer:     Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
CommitterDate: Fri, 02 Dec 2022 12:48:28 +01:00

clocksource/drivers/timer-npcm7xx: Enable timer 1 clock before use

In the WPCM450 SoC, the clocks for each timer can be gated individually.
To prevent the timer 1 clock from being gated, enable it explicitly.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@xxxxxxx>
Reviewed-by: Joel Stanley <joel@xxxxxxxxx>
Link: https://lore.kernel.org/r/20221104161850.2889894-3-j.neuschaefer@xxxxxxx
Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
---
 drivers/clocksource/timer-npcm7xx.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/clocksource/timer-npcm7xx.c b/drivers/clocksource/timer-npcm7xx.c
index a00520c..9af30af 100644
--- a/drivers/clocksource/timer-npcm7xx.c
+++ b/drivers/clocksource/timer-npcm7xx.c
@@ -188,6 +188,7 @@ static void __init npcm7xx_clocksource_init(void)
 
 static int __init npcm7xx_timer_init(struct device_node *np)
 {
+	struct clk *clk;
 	int ret;
 
 	ret = timer_of_init(np, &npcm7xx_to);
@@ -199,6 +200,15 @@ static int __init npcm7xx_timer_init(struct device_node *np)
 	npcm7xx_to.of_clk.rate = npcm7xx_to.of_clk.rate /
 		(NPCM7XX_Tx_MIN_PRESCALE + 1);
 
+	/* Enable the clock for timer1, if it exists */
+	clk = of_clk_get(np, 1);
+	if (clk) {
+		if (!IS_ERR(clk))
+			clk_prepare_enable(clk);
+		else
+			pr_warn("%pOF: Failed to get clock for timer1: %pe", np, clk);
+	}
+
 	npcm7xx_clocksource_init();
 	npcm7xx_clockevents_init();