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Wysocki" , Viresh Kumar , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Asahi Linux , Linux ARM Kernel Architecture , Linux power management , Devicetree , LKML Cc: Nick Chan Subject: [PATCH v2 4/7] cpufreq: apple-soc: Use 32-bit read for status register Date: Thu, 12 Dec 2024 15:03:03 +0800 Message-ID: <20241212070344.3858-5-towinchenmi@gmail.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241212070344.3858-1-towinchenmi@gmail.com> References: <20241212070344.3858-1-towinchenmi@gmail.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- 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