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Thu, 25 Jan 2024 04:31:23 -0600 (CST) Received: from ediex02.ad.cirrus.com (198.61.84.81) by ediex01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Thu, 25 Jan 2024 10:31:17 +0000 Received: from ediswmail9.ad.cirrus.com (198.61.86.93) by anon-ediex02.ad.cirrus.com (198.61.84.81) with Microsoft SMTP Server id 15.2.1118.40 via Frontend Transport; Thu, 25 Jan 2024 10:31:17 +0000 Received: from ediswws07.ad.cirrus.com (ediswws07.ad.cirrus.com [198.90.208.14]) by ediswmail9.ad.cirrus.com (Postfix) with ESMTP id AA5D5820270; Thu, 25 Jan 2024 10:31:17 +0000 (UTC) From: Charles Keepax To: CC: , , , , Subject: [PATCH v2 7/7] ASoC: cs42l43: Use fls to calculate the pre-divider for the PLL Date: Thu, 25 Jan 2024 10:31:17 +0000 Message-ID: <20240125103117.2622095-7-ckeepax@opensource.cirrus.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20240125103117.2622095-1-ckeepax@opensource.cirrus.com> References: <20240125103117.2622095-1-ckeepax@opensource.cirrus.com> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: wTqMl6uxuAiMH9BltiOe4Yhf_F3B6Eqw X-Proofpoint-GUID: wTqMl6uxuAiMH9BltiOe4Yhf_F3B6Eqw X-Proofpoint-Spam-Reason: safe Message-ID-Hash: KXZNA77E2ILRD3CIJUY34CBL47VAR2TH X-Message-ID-Hash: KXZNA77E2ILRD3CIJUY34CBL47VAR2TH X-MailFrom: prvs=8754d201d6=ckeepax@opensource.cirrus.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.9 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: Use fls to calculate the pre-divider and input frequency for the PLL, this is marginally faster than the previous loop. Suggested-by: Andy Shevchenko Signed-off-by: Charles Keepax --- Changes since v1: - Change / into >> Thanks, Charles sound/soc/codecs/cs42l43.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/sound/soc/codecs/cs42l43.c b/sound/soc/codecs/cs42l43.c index 23e9557494afa..2c402086924d3 100644 --- a/sound/soc/codecs/cs42l43.c +++ b/sound/soc/codecs/cs42l43.c @@ -1338,10 +1338,9 @@ static int cs42l43_enable_pll(struct cs42l43_codec *priv) dev_dbg(priv->dev, "Enabling PLL at %uHz\n", freq); - while (freq > cs42l43_pll_configs[ARRAY_SIZE(cs42l43_pll_configs) - 1].freq) { - div++; - freq /= 2; - } + div = fls(freq) - + fls(cs42l43_pll_configs[ARRAY_SIZE(cs42l43_pll_configs) - 1].freq); + freq >>= div; if (div <= CS42L43_PLL_REFCLK_DIV_MASK) { int i;