clocksource/drivers/imx-sysctr: handle nxp,no-divider property

MrVan · dlezcano · commit 27b30995b75d · 2022-09-20T10:49:46.000+02:00
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@nxp.com> Link: https://lore.kernel.org/r/20220902111207.2902493-3-peng.fan@oss.nxp.com Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
diff --git 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);
