linux-kernel - [PATCH 2/2] clocksource/drivers/imx-sysctr: handle nxp,no-divider property

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Message-Id: <20220902111207.2902493-3-peng.fan@oss.nxp.com>
Date:   Fri,  2 Sep 2022 19:12:07 +0800
From:   "Peng Fan (OSS)" <peng.fan@....nxp.com>
To:     daniel.lezcano@...aro.org, tglx@...utronix.de, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, Peng Fan <peng.fan@....com>
Subject: [PATCH 2/2] clocksource/drivers/imx-sysctr: handle nxp,no-divider property

From: Peng Fan <peng.fan@....com>

The previous hardware design embedds a internal divider for base clock.
New design not has that divider, so check the nxp,no-divider property,
if true, directly use base clock input, otherwise divide by 3 as before.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 drivers/clocksource/timer-imx-sysctr.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/clocksource/timer-imx-sysctr.c b/drivers/clocksource/timer-imx-sysctr.c
index 523e37662a6e..5a7a951c4efc 100644
--- a/drivers/clocksource/timer-imx-sysctr.c
+++ b/drivers/clocksource/timer-imx-sysctr.c
@@ -134,8 +134,10 @@ static int __init sysctr_timer_init(struct device_node *np)
 	if (ret)
 		return ret;
 
-	/* system counter clock is divided by 3 internally */
-	to_sysctr.of_clk.rate /= SYS_CTR_CLK_DIV;
+	if (!of_property_read_bool(np, "nxp,no-divider")) {
+		/* system counter clock is divided by 3 internally */
+		to_sysctr.of_clk.rate /= SYS_CTR_CLK_DIV;
+	}
 
 	sys_ctr_base = timer_of_base(&to_sysctr);
 	cmpcr = readl(sys_ctr_base + CMPCR);
-- 
2.37.1