linux-kernel - [PATCH v3 4/7] cpufreq: apple-soc: Use 32-bit read for status register

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Message-ID: <20241218182834.22334-5-towinchenmi@gmail.com>
Date: Thu, 19 Dec 2024 02:25:06 +0800
From: Nick Chan <towinchenmi@...il.com>
To: Hector Martin <marcan@...can.st>,
	Sven Peter <sven@...npeter.dev>,
	Alyssa Rosenzweig <alyssa@...enzweig.io>,
	"Rafael J . Wysocki" <rafael@...nel.org>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Asahi Linux <asahi@...ts.linux.dev>,
	Linux ARM Kernel Architecture <linux-arm-kernel@...ts.infradead.org>,
	Linux power management <linux-pm@...r.kernel.org>,
	Devicetree <devicetree@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Cc: Nick Chan <towinchenmi@...il.com>
Subject: [PATCH v3 4/7] cpufreq: apple-soc: Use 32-bit read for status register

Apple A7-A9(X) SoCs requires 32-bit reads on the status register. Newer
SoCs accepts 32-bit reads on the status register as well.

Signed-off-by: Nick Chan <towinchenmi@...il.com>
---
 drivers/cpufreq/apple-soc-cpufreq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/cpufreq/apple-soc-cpufreq.c b/drivers/cpufreq/apple-soc-cpufreq.c
index 90e34105b50b..b27d261fe5a6 100644
--- a/drivers/cpufreq/apple-soc-cpufreq.c
+++ b/drivers/cpufreq/apple-soc-cpufreq.c
@@ -122,7 +122,7 @@ static unsigned int apple_soc_cpufreq_get_rate(unsigned int cpu)
 	unsigned int pstate;
 
 	if (priv->info->cur_pstate_mask) {
-		u64 reg = readq_relaxed(priv->reg_base + APPLE_DVFS_STATUS);
+		u32 reg = readl_relaxed(priv->reg_base + APPLE_DVFS_STATUS);
 
 		pstate = (reg & priv->info->cur_pstate_mask) >>  priv->info->cur_pstate_shift;
 	} else {
-- 
2.47.1