From: Dmitry Osipenko Subject: [PATCH v5 17/20] PM / devfreq: tegra30: Increase sampling period to 16ms Date: Tue, 30 Jul 2019 19:22:33 +0300 Message-ID: <20190730162236.6063-18-digetx@gmail.com> References: <20190730162236.6063-1-digetx@gmail.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20190730162236.6063-1-digetx@gmail.com> Sender: linux-kernel-owner@vger.kernel.org To: Thierry Reding , MyungJoo Ham , Kyungmin Park , Chanwoo Choi , Jonathan Hunter , Tomeu Vizoso Cc: linux-pm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: linux-tegra@vger.kernel.org Increase sampling period by 4ms to get a nicer pow2 value, converting diving into shifts in the code. That's more preferable for Tegra30 that doesn't have hardware divider instructions because of older Cortex-A9 CPU. In a result boosting events are delayed by 4ms, which is not sensible in practice at all. Reviewed-by: Chanwoo Choi Signed-off-by: Dmitry Osipenko --- drivers/devfreq/tegra30-devfreq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c index 8280f96f4cb9..3543fba74b52 100644 --- a/drivers/devfreq/tegra30-devfreq.c +++ b/drivers/devfreq/tegra30-devfreq.c @@ -67,7 +67,7 @@ * translates to 2 ^ (K_VAL + 1). ex: 2 ^ (6 + 1) = 128 */ #define ACTMON_AVERAGE_WINDOW_LOG2 6 -#define ACTMON_SAMPLING_PERIOD 12 /* ms */ +#define ACTMON_SAMPLING_PERIOD 16 /* ms */ #define KHZ 1000 -- 2.22.0