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From:   =?UTF-8?q?Jonathan=20Neusch=C3=A4fer?= <j.neuschaefer@gmx.net>
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        =?UTF-8?q?Jonathan=20Neusch=C3=A4fer?= <j.neuschaefer@gmx.net>,
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Subject: [PATCH v2 2/7] clocksource: timer-npcm7xx: Enable timer 1 clock before use
Date:   Fri, 29 Apr 2022 19:20:25 +0200
Message-Id: <20220429172030.398011-3-j.neuschaefer@gmx.net>
In-Reply-To: <20220429172030.398011-1-j.neuschaefer@gmx.net>
References: <20220429172030.398011-1-j.neuschaefer@gmx.net>
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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 Neusch=C3=A4fer <j.neuschaefer@gmx.net>
=2D--

v2:
- Provide context in pr_warn message

v1:
- https://lore.kernel.org/lkml/20220422183012.444674-3-j.neuschaefer@gmx.n=
et/
=2D--
 drivers/clocksource/timer-npcm7xx.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/clocksource/timer-npcm7xx.c b/drivers/clocksource/tim=
er-npcm7xx.c
index a00520cbb660a..9af30af5f989a 100644
=2D-- 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 =3D timer_of_init(np, &npcm7xx_to);
@@ -199,6 +200,15 @@ static int __init npcm7xx_timer_init(struct device_no=
de *np)
 	npcm7xx_to.of_clk.rate =3D npcm7xx_to.of_clk.rate /
 		(NPCM7XX_Tx_MIN_PRESCALE + 1);

+	/* Enable the clock for timer1, if it exists */
+	clk =3D 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();

=2D-
2.35.1